diff --git a/.github/workflows/update-canary-snapshots.yaml b/.github/workflows/update-canary-snapshots.yaml
new file mode 100644
index 000000000..fc1c4fe13
--- /dev/null
+++ b/.github/workflows/update-canary-snapshots.yaml
@@ -0,0 +1,57 @@
+name: Update canary snapshots
+
+on:
+  schedule:
+    - cron: "0 8 * * 1"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    timeout-minutes: 90
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version-file: .tool-versions
+      - name: Setup pnpm
+        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+      - name: Build
+        run: pnpm run build
+      - name: Update canary snapshots
+        env:
+          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
+          COHERE_API_KEY: ${{ secrets.COHERE_API_KEY }}
+          COPILOT_API_KEY: ${{ secrets.COPILOT_API_KEY }}
+          CURSOR_API_KEY: ${{ secrets.CURSOR_API_KEY }}
+          GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
+          GROQ_API_KEY: ${{ secrets.GROQ_API_KEY }}
+          HUGGINGFACE_API_KEY: ${{ secrets.HUGGINGFACE_API_KEY }}
+          MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          OPENROUTER_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}
+        run: node e2e/scripts/run-canary-tests-docker.mjs --update
+      - name: Open PR if snapshots changed
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          if git diff --quiet -- 'e2e/scenarios'; then
+            echo "No canary snapshot changes."
+            exit 0
+          fi
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          BRANCH="canary-snapshots/$(date +%Y%m%d)"
+          git checkout -b "$BRANCH"
+          git add e2e/scenarios
+          git commit -m "chore(e2e): update canary snapshots $(date +%Y-%m-%d)"
+          git push origin "$BRANCH"
+          gh pr create \
+            --title "chore(e2e): update canary snapshots $(date +%Y-%m-%d)" \
+            --body "Automated canary snapshot update. Review for unexpected structural changes in provider instrumentation before merging."
diff --git a/dev-packages/seinfeld/src/internal/well-known-headers.ts b/dev-packages/seinfeld/src/internal/well-known-headers.ts
index a9e99f4d8..425e426a2 100644
--- a/dev-packages/seinfeld/src/internal/well-known-headers.ts
+++ b/dev-packages/seinfeld/src/internal/well-known-headers.ts
@@ -16,6 +16,7 @@ export const AUTH_HEADERS = [
   "api-key",
   "x-api-key",
   "x-anthropic-api-key",
+  "x-goog-api-key",
   "cookie",
   "set-cookie",
   "proxy-authorization",
diff --git a/dev-packages/seinfeld/src/msw.ts b/dev-packages/seinfeld/src/msw.ts
index 527adc7a4..3474948bb 100644
--- a/dev-packages/seinfeld/src/msw.ts
+++ b/dev-packages/seinfeld/src/msw.ts
@@ -132,7 +132,11 @@ export async function buildResponse(
   ctx?: { store: CassetteStore; name: string },
 ): Promise<Response> {
   // Expand \n-joined set-cookie back into multiple header entries.
-  const headers = expandSetCookieHeader(recorded.headers);
+  // Strip encoding headers: stored bytes are already decoded by the fetch
+  // layer (undici decompresses gzip/deflate before handing the body to MSW
+  // handlers). Preserving content-encoding would cause callers to attempt a
+  // second decode of already-plain bytes, which throws a zlib error.
+  const headers = expandSetCookieHeader(stripEncodingHeaders(recorded.headers));
   const init: ResponseInit = { status: recorded.status, headers };
   if (recorded.statusText) init.statusText = recorded.statusText;
   // 1xx/204/304 responses must not have a body, per Fetch spec.
@@ -169,6 +173,22 @@ export async function buildResponse(
   return new Response(buffer, init);
 }
 
+const ENCODING_HEADERS = new Set([
+  "content-encoding",
+  "transfer-encoding",
+  "content-length",
+]);
+
+function stripEncodingHeaders(
+  headers: Record<string, string>,
+): Record<string, string> {
+  return Object.fromEntries(
+    Object.entries(headers).filter(
+      ([key]) => !ENCODING_HEADERS.has(key.toLowerCase()),
+    ),
+  );
+}
+
 /**
  * Return a `[string, string][]` header list from a `Record<string, string>`,
  * splitting any `\n`-delimited `set-cookie` value back into separate entries.
diff --git a/dev-packages/seinfeld/src/recorder.ts b/dev-packages/seinfeld/src/recorder.ts
index 0b8b77aeb..23aeb48fc 100644
--- a/dev-packages/seinfeld/src/recorder.ts
+++ b/dev-packages/seinfeld/src/recorder.ts
@@ -8,6 +8,7 @@ import type {
   CassetteEntry,
   CassetteMode,
   RecordedRequest,
+  RecordedResponse,
 } from "./cassette";
 import { AggregateCassetteMissError, CassetteMissError } from "./errors";
 import { CURRENT_FORMAT_VERSION } from "./format";
@@ -221,8 +222,22 @@ async function handleRecord(
     response: redactedResponse,
   });
 
-  // Return the real response to the caller. recordResponseDraft only used
-  // .clone() internally, so realResponse body is still available to clone.
+  // Return the response to the caller.
+  //
+  // For non-draft bodies (JSON, text, empty, SSE), build a fresh Response
+  // from the already-captured bytes. This avoids a Node.js/undici issue
+  // where realResponse.clone() after recordResponseDraft() (which already
+  // teed the body stream) can return an empty body, causing callers to
+  // misparse the response.
+  //
+  // For binary-draft bodies (large responses above the threshold), the
+  // bytes haven't been materialised yet, so fall back to realResponse.clone().
+  if (captured.body.kind !== "binary-draft") {
+    return buildResponse(captured as unknown as RecordedResponse, {
+      store: ctx.store,
+      name: ctx.name,
+    });
+  }
   return realResponse.clone();
 }
 
diff --git a/dev-packages/seinfeld/src/redactor/index.ts b/dev-packages/seinfeld/src/redactor/index.ts
index 7f3f0fa49..95521c602 100644
--- a/dev-packages/seinfeld/src/redactor/index.ts
+++ b/dev-packages/seinfeld/src/redactor/index.ts
@@ -49,6 +49,13 @@ export interface RedactionConfig {
    * forms, or in SSE event lines that are not JSON.
    */
   redactBodyText?: Array<RegExp | { pattern: RegExp; replacement?: string }>;
+  /**
+   * When `true`, all request headers are omitted from the persisted cassette.
+   * Request headers are never used for replay matching (only method, URL, and
+   * body are compared), so dropping them entirely is a safe way to prevent
+   * credentials from leaking into cassette files committed to version control.
+   */
+  omitRequestHeaders?: boolean;
   /** Custom request transform run after declarative redaction. */
   redactRequest?: (req: RecordedRequest) => RecordedRequest;
   /** Custom response transform run after declarative redaction. */
@@ -172,7 +179,9 @@ function applyRequestRedactionConfig(
 ): RecordedRequest {
   let result: RecordedRequest = req;
 
-  if (config.redactHeaders && config.redactHeaders.length > 0) {
+  if (config.omitRequestHeaders) {
+    result = { ...result, headers: {} };
+  } else if (config.redactHeaders && config.redactHeaders.length > 0) {
     result = {
       ...result,
       headers: maskHeaders(result.headers, config.redactHeaders),
diff --git a/dev-packages/seinfeld/src/redactor/presets.ts b/dev-packages/seinfeld/src/redactor/presets.ts
index 58fcf81d7..9459cd048 100644
--- a/dev-packages/seinfeld/src/redactor/presets.ts
+++ b/dev-packages/seinfeld/src/redactor/presets.ts
@@ -32,6 +32,7 @@ const AGGRESSIVE_REDACTION: RedactionConfig = {
  * APIs use per-request credentials that could appear in response bodies.
  */
 const PARANOID_REDACTION: RedactionConfig = {
+  omitRequestHeaders: true,
   redactHeaders: CREDENTIAL_HEADERS,
   redactBodyFields: [/^(api_?key|token|secret|password|authorization)$/i],
   redactBodyText: [
diff --git a/dev-packages/seinfeld/test/redactor.test.ts b/dev-packages/seinfeld/test/redactor.test.ts
index 3ebc91254..996f8c828 100644
--- a/dev-packages/seinfeld/test/redactor.test.ts
+++ b/dev-packages/seinfeld/test/redactor.test.ts
@@ -355,9 +355,9 @@ describe("resolveRedactors", () => {
 });
 
 describe("'paranoid' preset", () => {
-  it("masks credential headers", () => {
+  it("drops all request headers", () => {
     const out = applyRequestRedaction(baseReq, "paranoid");
-    expect(out.headers.Authorization).toBe(REDACTED_SENTINEL);
+    expect(out.headers).toEqual({});
   });
 
   it("masks common credential field names in JSON bodies", () => {
diff --git a/dev-packages/seinfeld/test/store/file-store.test.ts b/dev-packages/seinfeld/test/store/file-store.test.ts
index ce2649aae..8e54d84ed 100644
--- a/dev-packages/seinfeld/test/store/file-store.test.ts
+++ b/dev-packages/seinfeld/test/store/file-store.test.ts
@@ -62,7 +62,7 @@ describe("createJsonFileStore", () => {
     const store = createJsonFileStore({ rootDir: dir });
     await store.save("demo", makeCassette());
     const raw = await readFile(join(dir, "demo.cassette.json"), "utf8");
-    expect(raw).toMatch(/^\{\n {2}"version": 1/);
+    expect(raw).toMatch(/^\{\n {2}"entries":/);
     expect(raw.endsWith("\n")).toBe(true);
   });
 
@@ -70,7 +70,7 @@ describe("createJsonFileStore", () => {
     const store = createJsonFileStore({ rootDir: dir, pretty: false });
     await store.save("demo", makeCassette());
     const raw = await readFile(join(dir, "demo.cassette.json"), "utf8");
-    expect(raw.startsWith('{"version":1')).toBe(true);
+    expect(raw.startsWith('{"entries":')).toBe(true);
     expect(raw.endsWith("\n")).toBe(false);
   });
 
diff --git a/e2e/helpers/cassette-preload.mjs b/e2e/helpers/cassette-preload.mjs
index 54e153dd6..28734e406 100644
--- a/e2e/helpers/cassette-preload.mjs
+++ b/e2e/helpers/cassette-preload.mjs
@@ -50,7 +50,59 @@ async function bootCassettePreload(cassetteDir) {
 
   await cassette.start();
 
-  process.on("beforeExit", async () => {
+  if (mode === "record") {
+    installRecordModeGuard(cassette);
+  } else {
+    process.on("beforeExit", async () => {
+      try {
+        await cassette.stop();
+      } catch (err) {
+        process.stderr.write(
+          `[cassette] stop error: ${err instanceof Error ? err.message : String(err)}\n`,
+        );
+        process.exit(1);
+      }
+    });
+  }
+}
+
+/**
+ * In record mode, `beforeExit` can fire in the gap between sequential HTTP
+ * calls (e.g. ADK's two-step tool-call flow: first call returns a functionCall,
+ * tool executes synchronously, then the second call sends the result). The gap
+ * between calls has no pending I/O, so the event loop empties and `beforeExit`
+ * fires prematurely — causing only a partial cassette to be saved.
+ *
+ * Fix: wrap `globalThis.fetch` (after MSW has installed its proxy) to track
+ * in-flight request count. A drain timer is set after each request completes
+ * and reset when the next request starts. `cassette.stop()` is only called
+ * when the drain timer fires with no in-flight requests, guaranteeing all
+ * sequential HTTP calls have been captured before we flush.
+ *
+ * @param {import("@braintrust/seinfeld").Cassette} cassette
+ */
+function installRecordModeGuard(cassette) {
+  // How long to wait after the last HTTP call before flushing the cassette.
+  // Must be long enough for the scenario to initiate the next sequential
+  // request. For ADK tool-call flows, the event loop empties between calls
+  // (MSW doesn't maintain a keep-alive socket) so the drain delay must be
+  // large enough to cover any gap between sequential Gemini API calls.
+  const DRAIN_DELAY_MS = 2000;
+
+  const mswFetch = globalThis.fetch;
+  let inFlight = 0;
+  /** @type {ReturnType<typeof setTimeout> | null} */
+  let drainTimer = null;
+  let stopping = false;
+
+  async function stopOnDrain() {
+    if (stopping) return;
+    if (inFlight > 0) return; // new request started before drain fired
+    stopping = true;
+    if (drainTimer) {
+      clearTimeout(drainTimer);
+      drainTimer = null;
+    }
     try {
       await cassette.stop();
     } catch (err) {
@@ -59,6 +111,32 @@ async function bootCassettePreload(cassetteDir) {
       );
       process.exit(1);
     }
+  }
+
+  function scheduleDrain() {
+    if (stopping) return;
+    if (drainTimer) clearTimeout(drainTimer);
+    drainTimer = setTimeout(stopOnDrain, DRAIN_DELAY_MS);
+  }
+
+  globalThis.fetch = async function recordGuardFetch(input, init) {
+    // Cancel any pending drain — a new request is starting.
+    if (drainTimer) {
+      clearTimeout(drainTimer);
+      drainTimer = null;
+    }
+    inFlight++;
+    try {
+      return await mswFetch(input, init);
+    } finally {
+      inFlight--;
+      scheduleDrain();
+    }
+  };
+
+  // Fallback: if the scenario makes no HTTP calls, still flush the cassette.
+  process.on("beforeExit", async () => {
+    await stopOnDrain();
   });
 }
 
diff --git a/e2e/helpers/file-snapshot.ts b/e2e/helpers/file-snapshot.ts
index 726b86b74..d5dd68bee 100644
--- a/e2e/helpers/file-snapshot.ts
+++ b/e2e/helpers/file-snapshot.ts
@@ -1,5 +1,8 @@
+import { mkdirSync, writeFileSync } from "node:fs";
 import { dirname, join } from "node:path";
 import { fileURLToPath } from "node:url";
+import { expect } from "vitest";
+import { isCanaryMode } from "./scenario-installer";
 import { normalizeForSnapshot, type Json } from "./normalize";
 
 function sortJsonKeys(value: Json): Json {
@@ -22,9 +25,33 @@ export function formatJsonFileSnapshot(value: Json): string {
   return `${JSON.stringify(sortJsonKeys(normalizeForSnapshot(value)), null, 2)}\n`;
 }
 
+export async function matchFileSnapshot(
+  value: string,
+  path: string,
+): Promise<void> {
+  // In canary mode always write the snapshot and pass — never fail on content
+  // differences. The e2e-canary job catches live API failures; snapshot drift
+  // is surfaced separately by the update-canary-snapshots PR workflow.
+  if (isCanaryMode()) {
+    mkdirSync(dirname(path), { recursive: true });
+    writeFileSync(path, value, "utf8");
+    return;
+  }
+  await expect(value).toMatchFileSnapshot(path);
+}
+
 export function resolveFileSnapshotPath(
   testModuleUrl: string,
   filename: string,
 ): string {
-  return join(dirname(fileURLToPath(testModuleUrl)), "__snapshots__", filename);
+  // Canary tests use the latest provider versions, which may produce different
+  // span shapes. Keep their snapshots separate so pinned and canary baselines
+  // can diverge independently.
+  const subdir = isCanaryMode() ? "canary" : "";
+  return join(
+    dirname(fileURLToPath(testModuleUrl)),
+    "__snapshots__",
+    subdir,
+    filename,
+  );
 }
diff --git a/e2e/scenarios/ai-sdk-instrumentation/__cassettes__/ai-sdk-v3.cassette.json b/e2e/scenarios/ai-sdk-instrumentation/__cassettes__/ai-sdk-v3.cassette.json
index f2462120f..e4e77102e 100644
--- a/e2e/scenarios/ai-sdk-instrumentation/__cassettes__/ai-sdk-v3.cassette.json
+++ b/e2e/scenarios/ai-sdk-instrumentation/__cassettes__/ai-sdk-v3.cassette.json
@@ -1,21 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-28T23:46:48.426Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "de4c41d5522cc15c",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:46:48.426Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -29,21 +19,12 @@
             "model": "gpt-4o-mini-2024-07-18",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "vary": "Accept-Encoding",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -82,20 +63,27 @@
               "total_tokens": 20
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "vary": "Accept-Encoding",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "2da350587967e9a1",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 1,
       "recordedAt": "2026-04-28T23:46:48.426Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -113,22 +101,13 @@
             },
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "text/event-stream; charset=utf-8",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
-          "kind": "sse",
           "chunks": [
             "data: {\"id\":\"chatcmpl-DZmQW9Y9oCvSBaUCWQm4l6AfqpCRl\",\"object\":\"chat.completion.chunk\",\"created\":1777420004,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_9a79c9e034\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"refusal\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"RO7NJHVUZ\"}",
             "data: {\"id\":\"chatcmpl-DZmQW9Y9oCvSBaUCWQm4l6AfqpCRl\",\"object\":\"chat.completion.chunk\",\"created\":1777420004,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_9a79c9e034\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"One\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"qyo47mYC\"}",
@@ -140,21 +119,28 @@
             "data: {\"id\":\"chatcmpl-DZmQW9Y9oCvSBaUCWQm4l6AfqpCRl\",\"object\":\"chat.completion.chunk\",\"created\":1777420004,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_9a79c9e034\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"usage\":null,\"obfuscation\":\"d1PRf\"}",
             "data: {\"id\":\"chatcmpl-DZmQW9Y9oCvSBaUCWQm4l6AfqpCRl\",\"object\":\"chat.completion.chunk\",\"created\":1777420004,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_9a79c9e034\",\"choices\":[],\"usage\":{\"prompt_tokens\":22,\"completion_tokens\":6,\"total_tokens\":28,\"prompt_tokens_details\":{\"cached_tokens\":0,\"audio_tokens\":0},\"completion_tokens_details\":{\"reasoning_tokens\":0,\"audio_tokens\":0,\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0}},\"obfuscation\":\"QLsV6jl5fu2\"}",
             "data: [DONE]"
-          ]
-        }
+          ],
+          "kind": "sse"
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "text/event-stream; charset=utf-8",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "f15f56a896602309",
       "matchKey": "POST api.openai.com/v1/embeddings",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:46:48.426Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/embeddings",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -162,20 +148,12 @@
             "input": ["Paris is the capital of France."],
             "model": "text-embedding-3-small"
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/embeddings"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
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diff --git a/e2e/scenarios/ai-sdk-instrumentation/__cassettes__/ai-sdk-v5.cassette.json b/e2e/scenarios/ai-sdk-instrumentation/__cassettes__/ai-sdk-v5.cassette.json
index a9bf05fa4..275c29f37 100644
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             "event: response.completed\ndata: {\"type\": \"response.completed\", \"response\": {\"id\": \"resp_9059463ef40d1fa09b5b5033a6f06af2\", \"object\": \"response\", \"created_at\": 1777330404, \"status\": \"completed\", \"background\": false, \"completed_at\": 1777330405, \"error\": null, \"frequency_penalty\": 0.0, \"incomplete_details\": null, \"instructions\": null, \"max_output_tokens\": 32, \"max_tool_calls\": null, \"model\": \"gpt-4o-mini-2024-07-18\", \"moderation\": null, \"output\": [{\"id\": \"msg_9074cbeba8658e9da876d06205edad52\", \"type\": \"message\", \"status\": \"completed\", \"content\": [{\"type\": \"output_text\", \"annotations\": [], \"logprobs\": [], \"text\": \"STREAM HELLO\"}], \"role\": \"assistant\"}], \"parallel_tool_calls\": true, \"presence_penalty\": 0.0, \"previous_response_id\": null, \"prompt_cache_key\": null, \"prompt_cache_retention\": \"in_memory\", \"reasoning\": {\"effort\": null, \"summary\": null}, \"safety_identifier\": null, \"service_tier\": \"default\", \"store\": true, \"temperature\": 0.0, \"text\": {\"format\": {\"type\": \"text\"}, \"verbosity\": \"medium\"}, \"tool_choice\": \"auto\", \"tools\": [], \"top_logprobs\": 0, \"top_p\": 1.0, \"truncation\": \"disabled\", \"usage\": {\"input_tokens\": 20, \"input_tokens_details\": {\"cached_tokens\": 0}, \"output_tokens\": 2, \"output_tokens_details\": {\"reasoning_tokens\": 0}, \"total_tokens\": 22}, \"user\": null, \"metadata\": {}}, \"sequence_number\": 10}"
-          ]
-        }
+          ],
+          "kind": "sse"
+        },
+        "headers": {
+          "content-type": "text/event-stream; charset=utf-8",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 15,
       "id": "d55b2b2323a80add",
       "matchKey": "POST api.openai.com/v1/responses",
-      "callIndex": 15,
       "recordedAt": "2026-04-27T22:52:52.069Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/responses",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1849,16 +1809,12 @@
             "model": "gpt-4o-mini-2024-07-18",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1933,20 +1889,22 @@
             },
             "user": null
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "f15f56a896602309",
       "matchKey": "POST api.openai.com/v1/embeddings",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:46:54.779Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/embeddings",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1954,20 +1912,12 @@
             "input": ["Paris is the capital of France."],
             "model": "text-embedding-3-small"
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/embeddings"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -2536,20 +2486,26 @@
               "total_tokens": 7
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "e534fd943eb3c71c",
       "matchKey": "POST api.openai.com/v1/embeddings",
-      "callIndex": 1,
       "recordedAt": "2026-04-28T23:46:54.779Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/embeddings",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -2561,20 +2517,12 @@
             ],
             "model": "text-embedding-3-small"
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/embeddings"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -4261,57 +4209,60 @@
               "total_tokens": 16
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "7682bac2e3324e9b",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 0,
       "recordedAt": "2026-04-27T22:52:52.069Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "content-type": "application/json",
-          "anthropic-version": "2023-06-01"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "model": "claude-haiku-4-5-20251001",
             "max_tokens": 24,
             "messages": [
               {
-                "role": "user",
-                "content": "placeholder"
+                "content": "placeholder",
+                "role": "user"
               }
             ],
+            "model": "claude-haiku-4-5-20251001",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "id": "msg_e8d4b7077032e1020155251bbfd4c447",
-            "type": "message",
-            "role": "assistant",
-            "model": "claude-haiku-4-5-20251001",
             "content": [
               {
-                "type": "text",
-                "text": "CACHE_OK"
+                "text": "CACHE_OK",
+                "type": "text"
               }
             ],
+            "id": "msg_e8d4b7077032e1020155251bbfd4c447",
+            "model": "claude-haiku-4-5-20251001",
+            "role": "assistant",
             "stop_reason": "end_turn",
             "stop_sequence": null,
+            "type": "message",
             "usage": {
               "cache_creation": {
                 "ephemeral_1h_input_tokens": 0,
@@ -4325,57 +4276,54 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "e5788878513bb84c",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 1,
       "recordedAt": "2026-04-27T22:52:52.069Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "content-type": "application/json",
-          "anthropic-version": "2023-06-01"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "model": "claude-haiku-4-5-20251001",
             "max_tokens": 24,
             "messages": [
               {
-                "role": "user",
-                "content": "placeholder"
+                "content": "placeholder",
+                "role": "user"
               }
             ],
+            "model": "claude-haiku-4-5-20251001",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "id": "msg_a01859a5f0014615c8716221e6bf4e26",
-            "type": "message",
-            "role": "assistant",
-            "model": "claude-haiku-4-5-20251001",
             "content": [
               {
-                "type": "text",
-                "text": "CACHE_OK"
+                "text": "CACHE_OK",
+                "type": "text"
               }
             ],
+            "id": "msg_a01859a5f0014615c8716221e6bf4e26",
+            "model": "claude-haiku-4-5-20251001",
+            "role": "assistant",
             "stop_reason": "end_turn",
             "stop_sequence": null,
+            "type": "message",
             "usage": {
               "cache_creation": {
                 "ephemeral_1h_input_tokens": 0,
@@ -4389,57 +4337,54 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 2,
       "id": "4840019345a20466",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 2,
       "recordedAt": "2026-04-27T22:52:52.069Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "content-type": "application/json",
-          "anthropic-version": "2023-06-01"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "model": "claude-haiku-4-5-20251001",
             "max_tokens": 24,
             "messages": [
               {
-                "role": "user",
-                "content": "placeholder"
+                "content": "placeholder",
+                "role": "user"
               }
             ],
+            "model": "claude-haiku-4-5-20251001",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "id": "msg_cc3f30e39ba442c11ea54b8be93073ab",
-            "type": "message",
-            "role": "assistant",
-            "model": "claude-haiku-4-5-20251001",
             "content": [
               {
-                "type": "text",
-                "text": "CACHE_OK"
+                "text": "CACHE_OK",
+                "type": "text"
               }
             ],
+            "id": "msg_cc3f30e39ba442c11ea54b8be93073ab",
+            "model": "claude-haiku-4-5-20251001",
+            "role": "assistant",
             "stop_reason": "end_turn",
             "stop_sequence": null,
+            "type": "message",
             "usage": {
               "cache_creation": {
                 "ephemeral_1h_input_tokens": 0,
@@ -4453,44 +4398,50 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "0a446726c242300c",
       "matchKey": "POST api.cohere.com/v2/rerank",
-      "callIndex": 0,
       "recordedAt": "2026-04-27T22:53:01.327Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.cohere.com/v2/rerank",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "model": "rerank-v3.5",
-            "query": "Which document is about France?",
             "documents": [
               "Athens is in Greece.",
               "Paris is in France.",
               "Lima is in Peru."
             ],
+            "model": "rerank-v3.5",
+            "query": "Which document is about France?",
             "top_n": 2
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/rerank"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
             "id": "rerank-67c987130d583954",
+            "meta": {
+              "api_version": {
+                "version": "2"
+              },
+              "billed_units": {
+                "search_units": 1
+              }
+            },
             "results": [
               {
                 "document": {
@@ -4506,18 +4457,20 @@
                 "index": 2,
                 "relevance_score": 0.00013
               }
-            ],
-            "meta": {
-              "api_version": {
-                "version": "2"
-              },
-              "billed_units": {
-                "search_units": 1
-              }
-            }
+            ]
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-27T22:53:01.327Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/ai-sdk-instrumentation/assertions.ts b/e2e/scenarios/ai-sdk-instrumentation/assertions.ts
index adf3774e0..c2f2b8c8c 100644
--- a/e2e/scenarios/ai-sdk-instrumentation/assertions.ts
+++ b/e2e/scenarios/ai-sdk-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -1299,7 +1300,7 @@ export function defineAISDKInstrumentationAssertions(options: {
     }
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(
           buildSpanSummary(events, {
             agentSpanName: options.agentSpanName,
@@ -1311,11 +1312,12 @@ export function defineAISDKInstrumentationAssertions(options: {
             supportsStreamObject: options.supportsStreamObject,
           }),
         ),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
 
     test("matches the shared payload snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(
           buildPayloadSummary(events, {
             agentSpanName: options.agentSpanName,
@@ -1327,7 +1329,8 @@ export function defineAISDKInstrumentationAssertions(options: {
             supportsStreamObject: options.supportsStreamObject,
           }),
         ),
-      ).toMatchFileSnapshot(payloadSnapshotPath);
+        payloadSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/ai-sdk-otel-export/__cassettes__/ai-sdk-v5.cassette.json b/e2e/scenarios/ai-sdk-otel-export/__cassettes__/ai-sdk-v5.cassette.json
index 4e96fc72b..3f4f21352 100644
--- a/e2e/scenarios/ai-sdk-otel-export/__cassettes__/ai-sdk-v5.cassette.json
+++ b/e2e/scenarios/ai-sdk-otel-export/__cassettes__/ai-sdk-v5.cassette.json
@@ -1,21 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-27T22:52:52.069Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "7233dc0e813c46f6",
       "matchKey": "POST api.openai.com/v1/responses",
-      "callIndex": 0,
       "recordedAt": "2026-04-27T22:52:52.069Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/responses",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -34,18 +24,12 @@
             "model": "gpt-4o-mini-2024-07-18",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -120,20 +104,24 @@
             },
             "user": null
           }
-        }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "8317e7e21b94baab",
       "matchKey": "POST api.openai.com/v1/responses",
-      "callIndex": 1,
       "recordedAt": "2026-04-27T22:52:52.069Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/responses",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -153,20 +141,13 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "text/event-stream; charset=utf-8",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff"
-        },
         "body": {
-          "kind": "sse",
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       "id": "d3dcb10944ef4066",
       "matchKey": "POST api.openai.com/v1/responses",
-      "callIndex": 4,
       "recordedAt": "2026-04-27T22:53:01.327Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/responses",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -571,18 +553,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -669,20 +645,24 @@
             },
             "user": null
           }
-        }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 5,
       "id": "64b3ec51c84fc886",
       "matchKey": "POST api.openai.com/v1/responses",
-      "callIndex": 5,
       "recordedAt": "2026-04-27T22:53:01.327Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/responses",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -749,18 +729,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -847,8 +821,22 @@
             },
             "user": null
           }
-        }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-27T22:53:01.327Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts b/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts
index 791040cb0..68f9b4f28 100644
--- a/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts
+++ b/e2e/scenarios/ai-sdk-otel-export/scenario.test.ts
@@ -1,6 +1,7 @@
 import { expect, test } from "vitest";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import {
@@ -138,7 +139,8 @@ for (const scenario of scenarios) {
                 ? a.name.localeCompare(b.name)
                 : Number(a.hasParent) - Number(b.hasParent),
             );
-          await expect(formatJsonFileSnapshot(spanSummary)).toMatchFileSnapshot(
+          await matchFileSnapshot(
+            formatJsonFileSnapshot(spanSummary),
             resolveFileSnapshotPath(
               import.meta.url,
               `${scenario.dependencyName}.otel-spans.json`,
@@ -146,7 +148,7 @@ for (const scenario of scenarios) {
           );
 
           // Snapshot request metadata.
-          await expect(
+          await matchFileSnapshot(
             formatJsonFileSnapshot(
               otelRequests
                 .map((request) =>
@@ -169,7 +171,6 @@ for (const scenario of scenarios) {
                   rawBody: "<omitted>",
                 })),
             ),
-          ).toMatchFileSnapshot(
             resolveFileSnapshotPath(
               import.meta.url,
               `${scenario.dependencyName}.otel-requests.json`,
diff --git a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0273.cassette.json b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0273.cassette.json
index 96ef87208..f85e7345d 100644
--- a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0273.cassette.json
+++ b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0273.cassette.json
@@ -1,24 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-28T23:04:55.016Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "7013a168b3f007e8",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:04:55.016Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -32,32 +19,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
-          "anthropic-ratelimit-input-tokens-limit": "4000000",
-          "anthropic-ratelimit-input-tokens-remaining": "4000000",
-          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:49Z",
-          "anthropic-ratelimit-output-tokens-limit": "800000",
-          "anthropic-ratelimit-output-tokens-remaining": "800000",
-          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:49Z",
-          "anthropic-ratelimit-requests-limit": "20000",
-          "anthropic-ratelimit-requests-remaining": "19999",
-          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:49Z",
-          "anthropic-ratelimit-tokens-limit": "4800000",
-          "anthropic-ratelimit-tokens-remaining": "4800000",
-          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:49Z",
-          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
-          "content-type": "application/json",
-          "request-id": "req_011CaX1J8U578f1B48KS1Rh5",
-          "vary": "Accept-Encoding",
-          "x-envoy-upstream-service-time": "644",
-          "x-robots-tag": "none"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -87,23 +54,38 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:49Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:49Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:49Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:49Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1J8U578f1B48KS1Rh5",
+          "vary": "Accept-Encoding",
+          "x-envoy-upstream-service-time": "644",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "d5bfecff47d61304",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 1,
       "recordedAt": "2026-04-28T23:04:55.016Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -117,31 +99,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
-          "anthropic-ratelimit-input-tokens-limit": "4000000",
-          "anthropic-ratelimit-input-tokens-remaining": "4000000",
-          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:50Z",
-          "anthropic-ratelimit-output-tokens-limit": "800000",
-          "anthropic-ratelimit-output-tokens-remaining": "800000",
-          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:50Z",
-          "anthropic-ratelimit-requests-limit": "20000",
-          "anthropic-ratelimit-requests-remaining": "19999",
-          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:49Z",
-          "anthropic-ratelimit-tokens-limit": "4800000",
-          "anthropic-ratelimit-tokens-remaining": "4800000",
-          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:50Z",
-          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
-          "content-type": "application/json",
-          "request-id": "req_011CaX1JC7LwQMrzDUYFcQML",
-          "x-envoy-upstream-service-time": "449",
-          "x-robots-tag": "none"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -171,23 +134,37 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:50Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:50Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:49Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:50Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1JC7LwQMrzDUYFcQML",
+          "x-envoy-upstream-service-time": "449",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 2,
       "id": "4f7d9d4ecc36bbea",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 2,
       "recordedAt": "2026-04-28T23:04:55.016Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -214,31 +191,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
-          "anthropic-ratelimit-input-tokens-limit": "4000000",
-          "anthropic-ratelimit-input-tokens-remaining": "3999000",
-          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:51Z",
-          "anthropic-ratelimit-output-tokens-limit": "800000",
-          "anthropic-ratelimit-output-tokens-remaining": "800000",
-          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:51Z",
-          "anthropic-ratelimit-requests-limit": "20000",
-          "anthropic-ratelimit-requests-remaining": "19999",
-          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:50Z",
-          "anthropic-ratelimit-tokens-limit": "4800000",
-          "anthropic-ratelimit-tokens-remaining": "4799000",
-          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:51Z",
-          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
-          "content-type": "application/json",
-          "request-id": "req_011CaX1JFmN4pShuvbcKC6Ej",
-          "x-envoy-upstream-service-time": "1065",
-          "x-robots-tag": "none"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -268,23 +226,37 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "3999000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:51Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:51Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:50Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4799000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:51Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1JFmN4pShuvbcKC6Ej",
+          "x-envoy-upstream-service-time": "1065",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 3,
       "id": "343d969b488b84f2",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 3,
       "recordedAt": "2026-04-28T23:04:55.016Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -299,11 +271,24 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-haiku-4-5-20251001\",\"id\":\"msg_01YPdGeF3zFRM14L8B2cC6TL\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":24,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":1,\"service_tier\":\"standard\",\"inference_geo\":\"not_available\"}}     }",
+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}  }",
+            "event: ping\ndata: {\"type\": \"ping\"}",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1 one\\n2 two\\n3 three\"}          }",
+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0            }",
+            "event: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":24,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":15} }",
+            "event: message_stop\ndata: {\"type\":\"message_stop\"        }"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
           "anthropic-ratelimit-input-tokens-limit": "4000000",
@@ -325,35 +310,16 @@
           "x-envoy-upstream-service-time": "458",
           "x-robots-tag": "none"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
-            "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-haiku-4-5-20251001\",\"id\":\"msg_01YPdGeF3zFRM14L8B2cC6TL\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":24,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":1,\"service_tier\":\"standard\",\"inference_geo\":\"not_available\"}}     }",
-            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}  }",
-            "event: ping\ndata: {\"type\": \"ping\"}",
-            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1 one\\n2 two\\n3 three\"}          }",
-            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0            }",
-            "event: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":24,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":15} }",
-            "event: message_stop\ndata: {\"type\":\"message_stop\"        }"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 4,
       "id": "81b48f1d594c2f95",
       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 4,
       "recordedAt": "2026-04-28T23:04:55.016Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json",
-          "x-stainless-helper-method": "stream"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -368,11 +334,24 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-haiku-4-5-20251001\",\"id\":\"msg_012EbUGmLfEc7GsCBMZAKpSK\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":24,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":1,\"service_tier\":\"standard\",\"inference_geo\":\"not_available\"}}  }",
+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}}",
+            "event: ping\ndata: {\"type\": \"ping\"}",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1 one\\n2 two\\n3 three\"}       }",
+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0        }",
+            "event: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":24,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":15}             }",
+            "event: message_stop\ndata: {\"type\":\"message_stop\"       }"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
           "anthropic-ratelimit-input-tokens-limit": "4000000",
@@ -395,34 +374,16 @@
           "x-envoy-upstream-service-time": "354",
           "x-robots-tag": "none"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
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-            "event: ping\ndata: {\"type\": \"ping\"}",
-            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1 one\\n2 two\\n3 three\"}       }",
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-            "event: message_stop\ndata: {\"type\":\"message_stop\"       }"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
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+      "callIndex": 5,
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       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 5,
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-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
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-          "accept-encoding": "gzip,deflate",
-          "anthropic-version": "2023-06-01",
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-        },
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           "value": {
@@ -458,11 +419,27 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-haiku-4-5-20251001\",\"id\":\"msg_01V3odUVvBp7MxCnzqZFrW1u\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":687,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":13,\"service_tier\":\"standard\",\"inference_geo\":\"not_available\"}}             }",
+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"tool_use\",\"id\":\"toolu_016LWtxJSJr8E91HsktMeniw\",\"name\":\"get_weather\",\"input\":{},\"caller\":{\"type\":\"direct\"}}        }",
+            "event: ping\ndata: {\"type\": \"ping\"}",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"\"}              }",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"{\\\"location\\\":\"}          }",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\" \\\"Paris, F\"}              }",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"rance\\\"}\"}     }",
+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0          }",
+            "event: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"tool_use\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":687,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":26}      }",
+            "event: message_stop\ndata: {\"type\":\"message_stop\" }"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
           "anthropic-ratelimit-input-tokens-limit": "4000000",
@@ -484,37 +461,16 @@
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-            "event: message_stop\ndata: {\"type\":\"message_stop\" }"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
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-      "callIndex": 6,
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-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "anthropic-version": "2023-06-01",
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         "body": {
           "kind": "json",
           "value": {
@@ -544,31 +500,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
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-          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:54Z",
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-          "x-envoy-upstream-service-time": "777",
-          "x-robots-tag": "none"
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         "body": {
           "kind": "json",
           "value": {
@@ -605,8 +542,35 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:54Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:54Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:54Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:54Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1JWbaztP1hnBgHhiE9",
+          "x-envoy-upstream-service-time": "777",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-28T23:04:55.016Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0390.cassette.json b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0390.cassette.json
index 7f1714075..541627b32 100644
--- a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0390.cassette.json
+++ b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0390.cassette.json
@@ -1,24 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-28T23:05:04.506Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
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-      "callIndex": 0,
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-          "anthropic-version": "2023-06-01",
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           "value": {
@@ -32,31 +19,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
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-          "x-envoy-upstream-service-time": "527",
-          "x-robots-tag": "none"
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         "body": {
           "kind": "json",
           "value": {
@@ -86,23 +54,37 @@
               "service_tier": "standard"
             }
           }
-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:04:56Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:57Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:56Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:56Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1JhPUZohCzcrA7aLbk",
+          "x-envoy-upstream-service-time": "527",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
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       "recordedAt": "2026-04-28T23:05:04.506Z",
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-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
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-          "anthropic-version": "2023-06-01",
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           "value": {
@@ -116,31 +98,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
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-        "statusText": "OK",
-        "headers": {
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           "value": {
@@ -170,23 +133,37 @@
               "service_tier": "standard"
             }
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-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
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+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
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+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:04:57Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:04:57Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:04:57Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1JkM5WrGjnNsurkQcf",
+          "x-envoy-upstream-service-time": "478",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
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+      "callIndex": 2,
       "id": "4f7d9d4ecc36bbea",
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-      "callIndex": 2,
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-        "url": "https://api.anthropic.com/v1/messages",
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           "value": {
@@ -213,32 +190,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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       "response": {
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+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:05:03Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:05:03Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:05:03Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:05:03Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1KAVPXbzhquDgAN9zV",
+          "x-envoy-upstream-service-time": "451",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 8,
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       "matchKey": "POST api.anthropic.com/v1/messages",
-      "callIndex": 8,
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-        "url": "https://api.anthropic.com/v1/messages?beta=true",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
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           "kind": "json",
           "value": {
@@ -723,11 +669,24 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages?beta=true"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
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+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}          }",
+            "event: ping\ndata: {\"type\": \"ping\"}",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1 one\\n2 two\\n3 three\"}   }",
+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0               }",
+            "event: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":24,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":15}     }",
+            "event: message_stop\ndata: {\"type\":\"message_stop\"               }"
+          ],
+          "kind": "sse"
+        },
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           "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
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@@ -749,19 +708,14 @@
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-            "event: message_stop\ndata: {\"type\":\"message_stop\"               }"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-28T23:05:04.506Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0712.cassette.json b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0712.cassette.json
index 8dab358bf..a8bfcd4bd 100644
--- a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0712.cassette.json
+++ b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0712.cassette.json
@@ -1,23 +1,11 @@
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-    "createdAt": "2026-04-28T23:05:21.143Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
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-      "callIndex": 0,
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-        "url": "https://api.anthropic.com/v1/messages",
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-          "anthropic-version": "2023-06-01",
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           "value": {
@@ -31,31 +19,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
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           "kind": "json",
           "value": {
@@ -85,22 +54,37 @@
               "service_tier": "standard"
             }
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-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:05:06Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:05:06Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:05:06Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:05:06Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1KQHrTTUsJD6ZngbPK",
+          "x-envoy-upstream-service-time": "481",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
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-      "callIndex": 1,
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-          "anthropic-version": "2023-06-01",
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           "value": {
@@ -114,31 +98,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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-        "statusText": "OK",
-        "headers": {
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@@ -168,22 +133,37 @@
               "service_tier": "standard"
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+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
+          "anthropic-ratelimit-input-tokens-limit": "4000000",
+          "anthropic-ratelimit-input-tokens-remaining": "4000000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:05:08Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:05:08Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:05:06Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:05:08Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1KSvrWSahaJxjY4dBu",
+          "x-envoy-upstream-service-time": "1421",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
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+      "callIndex": 2,
       "id": "4f7d9d4ecc36bbea",
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-      "callIndex": 2,
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@@ -210,32 +190,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
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@@ -265,22 +225,38 @@
               "service_tier": "standard"
             }
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-        }
+        },
+        "headers": {
+          "anthropic-organization-id": "27796668-7351-40ac-acc4-024aee8995a5",
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+          "anthropic-ratelimit-input-tokens-remaining": "3999000",
+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:05:09Z",
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+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:05:09Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:05:08Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4799000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:05:09Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1KaKc2AQf7kwAnmANR",
+          "vary": "Accept-Encoding",
+          "x-envoy-upstream-service-time": "1030",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
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@@ -295,11 +271,24 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
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+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}     }",
+            "event: ping\ndata: {\"type\": \"ping\"}",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1 one\\n2 two\\n3 three\"}             }",
+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0   }",
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+            "event: message_stop\ndata: {\"type\":\"message_stop\"   }"
+          ],
+          "kind": "sse"
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-            "event: message_stop\ndata: {\"type\":\"message_stop\"   }"
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-        }
+        "status": 200,
+        "statusText": "OK"
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     },
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@@ -363,11 +334,24 @@
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+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
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+          "x-envoy-upstream-service-time": "476",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
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     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-28T23:05:21.143Z",
+    "seinfeldVersion": "0.0.0"
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+  "version": 1
 }
diff --git a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0730.cassette.json b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0730.cassette.json
index 085f0b3d4..9684fd74b 100644
--- a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0730.cassette.json
+++ b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0730.cassette.json
@@ -1,23 +1,11 @@
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-  "meta": {
-    "createdAt": "2026-04-28T23:05:39.662Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
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-      "callIndex": 0,
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-          "anthropic-version": "2023-06-01",
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@@ -31,31 +19,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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-        "statusText": "OK",
-        "headers": {
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@@ -85,22 +54,37 @@
               "service_tier": "standard"
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+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:05:23Z",
+          "anthropic-ratelimit-output-tokens-limit": "800000",
+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:05:23Z",
+          "anthropic-ratelimit-requests-limit": "20000",
+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:05:23Z",
+          "anthropic-ratelimit-tokens-limit": "4800000",
+          "anthropic-ratelimit-tokens-remaining": "4797000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:05:23Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1Leb7Edhbzd2iVmkEG",
+          "x-envoy-upstream-service-time": "467",
+          "x-robots-tag": "none"
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+        "statusText": "OK"
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@@ -114,31 +98,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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-        "statusText": "OK",
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@@ -168,22 +133,37 @@
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+          "anthropic-ratelimit-tokens-remaining": "4800000",
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+          "x-envoy-upstream-service-time": "433",
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+        "statusText": "OK"
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@@ -210,32 +190,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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@@ -265,22 +225,38 @@
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+          "vary": "Accept-Encoding",
+          "x-envoy-upstream-service-time": "1148",
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+        "statusText": "OK"
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@@ -295,11 +271,24 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
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+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}  }",
+            "event: ping\ndata: {\"type\": \"ping\"}",
+            "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1 one\\n2 two\\n3 three\"} }",
+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0           }",
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+            "event: message_stop\ndata: {\"type\":\"message_stop\"              }"
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@@ -322,34 +311,16 @@
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+        "status": 200,
+        "statusText": "OK"
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@@ -364,11 +335,24 @@
             "stream": true,
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+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}    }",
+            "event: ping\ndata: {\"type\": \"ping\"}",
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+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0          }",
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+            "event: message_stop\ndata: {\"type\":\"message_stop\"           }"
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@@ -391,33 +375,16 @@
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-            "event: message_stop\ndata: {\"type\":\"message_stop\"           }"
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+        "status": 200,
+        "statusText": "OK"
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@@ -453,11 +420,29 @@
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+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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-        "statusText": "OK",
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diff --git a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0780.cassette.json b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0780.cassette.json
index f14200c51..d5b26e4f5 100644
--- a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0780.cassette.json
+++ b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0780.cassette.json
@@ -1,23 +1,11 @@
 {
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-    "createdAt": "2026-04-28T23:05:55.548Z",
-    "seinfeldVersion": "0.0.0"
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@@ -31,31 +19,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
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+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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-        "statusText": "OK",
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@@ -85,22 +54,37 @@
               "service_tier": "standard"
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+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:05:41Z",
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+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:05:41Z",
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+          "x-envoy-upstream-service-time": "517",
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@@ -114,32 +98,12 @@
             "model": "claude-haiku-4-5",
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+        "method": "POST",
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@@ -169,22 +133,38 @@
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+          "anthropic-ratelimit-requests-remaining": "19999",
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+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:05:42Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1N3ZFkZKhvMD3JSKPQ",
+          "vary": "Accept-Encoding",
+          "x-envoy-upstream-service-time": "415",
+          "x-robots-tag": "none"
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+        "status": 200,
+        "statusText": "OK"
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@@ -211,31 +191,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
           }
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+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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-        "statusText": "OK",
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@@ -265,22 +226,37 @@
               "service_tier": "standard"
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+          "anthropic-ratelimit-tokens-remaining": "4799000",
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+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
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+          "request-id": "req_011CaX1N6rwnD2VhV7zREkUY",
+          "x-envoy-upstream-service-time": "1203",
+          "x-robots-tag": "none"
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+        "statusText": "OK"
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@@ -295,11 +271,24 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
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+            "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}   }",
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@@ -321,34 +310,16 @@
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-            "event: message_stop\ndata: {\"type\":\"message_stop\"       }"
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+        "status": 200,
+        "statusText": "OK"
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@@ -363,11 +334,24 @@
             "stream": true,
             "temperature": 0
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-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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       "response": {
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-        "statusText": "OK",
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+            "event: message_stop\ndata: {\"type\":\"message_stop\"               }"
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@@ -389,33 +373,16 @@
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+        "status": 200,
+        "statusText": "OK"
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@@ -451,11 +418,27 @@
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+        "headers": {},
+        "method": "POST",
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-        "statusText": "OK",
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+          "vary": "Accept-Encoding",
+          "x-envoy-upstream-service-time": "516",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
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-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-28T23:05:55.548Z",
+    "seinfeldVersion": "0.0.0"
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 }
diff --git a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0800.cassette.json b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0800.cassette.json
index 5b4763ea5..6198c9572 100644
--- a/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0800.cassette.json
+++ b/e2e/scenarios/anthropic-instrumentation/__cassettes__/anthropic-v0800.cassette.json
@@ -1,23 +1,11 @@
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-    "seinfeldVersion": "0.0.0"
-  },
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@@ -31,32 +19,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
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-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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@@ -86,22 +54,38 @@
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+          "anthropic-ratelimit-input-tokens-reset": "2026-04-28T23:05:57Z",
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+          "anthropic-ratelimit-output-tokens-remaining": "800000",
+          "anthropic-ratelimit-output-tokens-reset": "2026-04-28T23:05:58Z",
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+          "anthropic-ratelimit-requests-remaining": "19999",
+          "anthropic-ratelimit-requests-reset": "2026-04-28T23:05:57Z",
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+          "anthropic-ratelimit-tokens-remaining": "4800000",
+          "anthropic-ratelimit-tokens-reset": "2026-04-28T23:05:57Z",
+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
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+          "request-id": "req_011CaX1PAsa75STLhmpF4hNW",
+          "vary": "Accept-Encoding",
+          "x-envoy-upstream-service-time": "667",
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@@ -115,32 +99,12 @@
             "model": "claude-haiku-4-5",
             "temperature": 0
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-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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@@ -170,22 +134,38 @@
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+        "statusText": "OK"
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@@ -212,31 +192,12 @@
             "model": "claude-haiku-4-5",
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+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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@@ -266,22 +227,37 @@
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+          "anthropic-ratelimit-tokens-remaining": "4799000",
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+        "statusText": "OK"
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@@ -296,11 +272,24 @@
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+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.anthropic.com/v1/messages"
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       "response": {
-        "status": 200,
-        "statusText": "OK",
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+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0            }",
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@@ -323,34 +312,16 @@
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+        "status": 200,
+        "statusText": "OK"
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@@ -365,11 +336,24 @@
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+        "method": "POST",
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+            "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0              }",
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+        "status": 200,
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@@ -453,11 +420,28 @@
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+        "method": "POST",
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+          "content-security-policy": "default-src 'none'; frame-ancestors 'none'",
+          "content-type": "application/json",
+          "request-id": "req_011CaX1QBu7k15zEwE3wkUNF",
+          "x-envoy-upstream-service-time": "722",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-28T23:06:11.918Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/anthropic-instrumentation/assertions.ts b/e2e/scenarios/anthropic-instrumentation/assertions.ts
index 2401efc27..3fe1d5f2a 100644
--- a/e2e/scenarios/anthropic-instrumentation/assertions.ts
+++ b/e2e/scenarios/anthropic-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -927,7 +928,7 @@ export function defineAnthropicInstrumentationAssertions(options: {
     }
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(
           buildSpanSummary(
             events,
@@ -936,11 +937,12 @@ export function defineAnthropicInstrumentationAssertions(options: {
             options.supportsThinking,
           ),
         ),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
 
     test("matches the shared payload snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(
           buildPayloadSummary(
             events,
@@ -949,7 +951,8 @@ export function defineAnthropicInstrumentationAssertions(options: {
             options.supportsThinking,
           ),
         ),
-      ).toMatchFileSnapshot(payloadSnapshotPath);
+        payloadSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.1.cassette.json b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.1.cassette.json
new file mode 100644
index 000000000..71b2531d1
--- /dev/null
+++ b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.1.cassette.json
@@ -0,0 +1,8 @@
+{
+  "entries": [],
+  "meta": {
+    "createdAt": "2026-05-07T00:38:38.115Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
+}
diff --git a/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.76.cassette.json b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.76.cassette.json
new file mode 100644
index 000000000..a216bfde9
--- /dev/null
+++ b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.76.cassette.json
@@ -0,0 +1,8 @@
+{
+  "entries": [],
+  "meta": {
+    "createdAt": "2026-05-07T00:39:27.234Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
+}
diff --git a/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.79.cassette.json b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.79.cassette.json
new file mode 100644
index 000000000..030e571a1
--- /dev/null
+++ b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.79.cassette.json
@@ -0,0 +1,8 @@
+{
+  "entries": [],
+  "meta": {
+    "createdAt": "2026-05-07T00:40:15.280Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
+}
diff --git a/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.81.cassette.json b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.81.cassette.json
new file mode 100644
index 000000000..f25ce8594
--- /dev/null
+++ b/e2e/scenarios/claude-agent-sdk-instrumentation/__cassettes__/claude-agent-sdk-v0.2.81.cassette.json
@@ -0,0 +1,8 @@
+{
+  "entries": [],
+  "meta": {
+    "createdAt": "2026-05-07T00:41:01.727Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
+}
diff --git a/e2e/scenarios/claude-agent-sdk-instrumentation/assertions.ts b/e2e/scenarios/claude-agent-sdk-instrumentation/assertions.ts
index 97938f04a..d766c1f4d 100644
--- a/e2e/scenarios/claude-agent-sdk-instrumentation/assertions.ts
+++ b/e2e/scenarios/claude-agent-sdk-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -686,9 +687,10 @@ export function defineClaudeAgentSDKInstrumentationAssertions(options: {
     });
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildSpanSummary(events)),
-      ).toMatchFileSnapshot(snapshotPath);
+        snapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/cohere-instrumentation/__cassettes__/cohere-v7-14-0.cassette.json b/e2e/scenarios/cohere-instrumentation/__cassettes__/cohere-v7-14-0.cassette.json
index a5994ee90..5e86a46ad 100644
--- a/e2e/scenarios/cohere-instrumentation/__cassettes__/cohere-v7-14-0.cassette.json
+++ b/e2e/scenarios/cohere-instrumentation/__cassettes__/cohere-v7-14-0.cassette.json
@@ -1,107 +1,91 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-05-05T00:00:00.000Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "cohere-v2-chat-sync-01",
       "matchKey": "POST api.cohere.com/v2/chat",
-      "callIndex": 0,
       "recordedAt": "2026-05-05T00:00:00.000Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.cohere.com/v2/chat",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "model": "command-a-03-2025",
+            "max_tokens": 32,
             "messages": [
               {
-                "role": "user",
-                "content": "Reply with exactly OK."
+                "content": "Reply with exactly OK.",
+                "role": "user"
               }
             ],
-            "max_tokens": 32,
-            "temperature": 0,
-            "stream": false
+            "model": "command-a-03-2025",
+            "stream": false,
+            "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/chat"
       },
       "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "id": "c8f4de69-bf3d-490e-97a1-40052615873c",
             "finish_reason": "COMPLETE",
+            "id": "c8f4de69-bf3d-490e-97a1-40052615873c",
             "message": {
-              "role": "assistant",
               "content": [
                 {
-                  "type": "text",
-                  "text": "OK."
+                  "text": "OK.",
+                  "type": "text"
                 }
-              ]
+              ],
+              "role": "assistant"
             },
             "usage": {
               "billed_units": {
                 "input_tokens": 5,
                 "output_tokens": 2
               },
+              "cached_tokens": 877,
               "tokens": {
                 "input_tokens": 886,
                 "output_tokens": 2
-              },
-              "cached_tokens": 877
+              }
             }
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json"
+        },
+        "status": 200
       }
     },
     {
+      "callIndex": 1,
       "id": "cohere-v2-chat-stream-01",
       "matchKey": "POST api.cohere.com/v2/chat",
-      "callIndex": 1,
       "recordedAt": "2026-05-05T00:00:00.000Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.cohere.com/v2/chat",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "model": "command-a-03-2025",
+            "max_tokens": 32,
             "messages": [
               {
-                "role": "user",
-                "content": "Reply with exactly STREAM."
+                "content": "Reply with exactly STREAM.",
+                "role": "user"
               }
             ],
-            "max_tokens": 32,
-            "temperature": 0,
-            "stream": true
+            "model": "command-a-03-2025",
+            "stream": true,
+            "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/chat"
       },
       "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "text/event-stream"
-        },
         "body": {
-          "kind": "sse",
           "chunks": [
             "data: {\"type\":\"message-start\",\"id\":\"msg-stream-abc\",\"delta\":{\"message\":{\"role\":\"assistant\"}}}",
             "data: {\"type\":\"content-start\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"type\":\"text\",\"text\":\"\"}}}}",
@@ -109,41 +93,38 @@
             "data: {\"type\":\"content-end\",\"index\":0}",
             "data: {\"type\":\"message-end\",\"id\":\"msg-stream-abc\",\"delta\":{\"finish_reason\":\"COMPLETE\",\"usage\":{\"cached_tokens\":0,\"billed_units\":{\"input_tokens\":6,\"output_tokens\":1},\"tokens\":{\"input_tokens\":887,\"output_tokens\":1}}}}",
             "data: [DONE]"
-          ]
-        }
+          ],
+          "kind": "sse"
+        },
+        "headers": {
+          "content-type": "text/event-stream"
+        },
+        "status": 200
       }
     },
     {
+      "callIndex": 0,
       "id": "cohere-v2-embed-01",
       "matchKey": "POST api.cohere.com/v2/embed",
-      "callIndex": 0,
       "recordedAt": "2026-05-05T00:00:00.000Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.cohere.com/v2/embed",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "texts": ["braintrust tracing"],
-            "model": "embed-english-v3.0",
+            "embedding_types": ["float"],
             "input_type": "search_document",
-            "embedding_types": ["float"]
+            "model": "embed-english-v3.0",
+            "texts": ["braintrust tracing"]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/embed"
       },
       "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "id": "embed-abc-123",
             "embeddings": {
               "float": [
                 [
@@ -152,7 +133,7 @@
                 ]
               ]
             },
-            "texts": ["braintrust tracing"],
+            "id": "embed-abc-123",
             "meta": {
               "api_version": {
                 "version": "2"
@@ -160,46 +141,52 @@
               "billed_units": {
                 "input_tokens": 2
               }
-            }
+            },
+            "texts": ["braintrust tracing"]
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json"
+        },
+        "status": 200
       }
     },
     {
+      "callIndex": 0,
       "id": "cohere-v2-rerank-01",
       "matchKey": "POST api.cohere.com/v2/rerank",
-      "callIndex": 0,
       "recordedAt": "2026-05-05T00:00:00.000Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.cohere.com/v2/rerank",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
-            "model": "rerank-english-v3.0",
-            "query": "What is the capital of France?",
             "documents": [
               "Paris is the capital city of France.",
               "Vienna is the capital city of Austria.",
               "Canberra is the capital city of Australia."
             ],
+            "model": "rerank-english-v3.0",
+            "query": "What is the capital of France?",
             "top_n": 2
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/rerank"
       },
       "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
             "id": "rerank-abc-456",
+            "meta": {
+              "api_version": {
+                "version": "2"
+              },
+              "billed_units": {
+                "search_units": 1
+              }
+            },
             "results": [
               {
                 "document": {
@@ -215,18 +202,19 @@
                 "index": 1,
                 "relevance_score": 0.00013
               }
-            ],
-            "meta": {
-              "api_version": {
-                "version": "2"
-              },
-              "billed_units": {
-                "search_units": 1
-              }
-            }
+            ]
           }
-        }
+        },
+        "headers": {
+          "content-type": "application/json"
+        },
+        "status": 200
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-05-05T00:00:00.000Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/cohere-instrumentation/assertions.ts b/e2e/scenarios/cohere-instrumentation/assertions.ts
index bd0a6941a..e3dcab925 100644
--- a/e2e/scenarios/cohere-instrumentation/assertions.ts
+++ b/e2e/scenarios/cohere-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import type { Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -329,7 +330,7 @@ export function defineCohereInstrumentationAssertions(options: {
         context.skip();
       }
 
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(
           buildSpanSummary(
             events,
@@ -337,7 +338,8 @@ export function defineCohereInstrumentationAssertions(options: {
             options.useV2Namespace ?? false,
           ),
         ),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/cursor-sdk-instrumentation/assertions.ts b/e2e/scenarios/cursor-sdk-instrumentation/assertions.ts
index e67359f92..9d4500c3f 100644
--- a/e2e/scenarios/cursor-sdk-instrumentation/assertions.ts
+++ b/e2e/scenarios/cursor-sdk-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -289,9 +290,10 @@ export function defineCursorSDKInstrumentationAssertions(options: {
     });
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(summarize(events)),
-      ).toMatchFileSnapshot(snapshotPath);
+        snapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/deno-browser/scenario.test.ts b/e2e/scenarios/deno-browser/scenario.test.ts
index cbf2d16d5..86930d192 100644
--- a/e2e/scenarios/deno-browser/scenario.test.ts
+++ b/e2e/scenarios/deno-browser/scenario.test.ts
@@ -1,6 +1,7 @@
 import { expect, test } from "vitest";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
@@ -149,7 +150,7 @@ test(
           ]),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             [
               basicSpan,
@@ -162,19 +163,17 @@ test(
               currentSpan,
             ].map((event) => summarizeEvent(event!)) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "span-events.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             payloadRowsForTestRunId(payloads(), testRunId) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "log-payloads.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             requests.map((request) =>
               summarizeRequest(request, {
@@ -182,7 +181,6 @@ test(
               }),
             ) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "request-flow.json"),
         );
       },
diff --git a/e2e/scenarios/deno-node/scenario.test.ts b/e2e/scenarios/deno-node/scenario.test.ts
index e4088101d..15143b375 100644
--- a/e2e/scenarios/deno-node/scenario.test.ts
+++ b/e2e/scenarios/deno-node/scenario.test.ts
@@ -1,6 +1,7 @@
 import { expect, test } from "vitest";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
@@ -159,7 +160,7 @@ test(
           ]),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             [
               basicSpan,
@@ -172,19 +173,17 @@ test(
               currentSpan,
             ].map((event) => summarizeEvent(event!)) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "span-events.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             payloadRowsForTestRunId(payloads(), testRunId) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "log-payloads.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             requests.map((request) =>
               summarizeRequest(request, {
@@ -192,7 +191,6 @@ test(
               }),
             ) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "request-flow.json"),
         );
       },
diff --git a/e2e/scenarios/github-copilot-instrumentation/__snapshots__/github-copilot-v0-auto.span-events.json b/e2e/scenarios/github-copilot-instrumentation/__snapshots__/github-copilot-v0-auto.span-events.json
new file mode 100644
index 000000000..c7678cc5d
--- /dev/null
+++ b/e2e/scenarios/github-copilot-instrumentation/__snapshots__/github-copilot-v0-auto.span-events.json
@@ -0,0 +1,147 @@
+{
+  "basic": {
+    "llm": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "model": "gpt-4.1"
+      },
+      "metric_keys": [
+        "completion_reasoning_tokens",
+        "completion_tokens",
+        "prompt_tokens",
+        "reasoning_tokens",
+        "tokens"
+      ],
+      "name": "github.copilot.llm",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:5>",
+      "span_parents": [
+        "<span:4>"
+      ],
+      "type": "llm"
+    },
+    "operation": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "github-copilot-basic-operation",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:2>",
+      "span_parents": [
+        "<span:1>"
+      ],
+      "type": null
+    },
+    "session": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "github_copilot.end_reason": "complete",
+        "github_copilot.model": "gpt-4.1"
+      },
+      "metric_keys": [],
+      "name": "Copilot Session",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:3>",
+      "span_parents": [
+        "<span:2>"
+      ],
+      "type": "task"
+    },
+    "turn": {
+      "has_input": true,
+      "has_output": true,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "Copilot Turn",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:4>",
+      "span_parents": [
+        "<span:3>"
+      ],
+      "type": "task"
+    }
+  },
+  "root": {
+    "has_input": false,
+    "has_output": false,
+    "metadata": {
+      "scenario": "github-copilot-instrumentation"
+    },
+    "metric_keys": [],
+    "name": "github-copilot-instrumentation-root",
+    "root_span_id": "<span:1>",
+    "span_id": "<span:1>",
+    "span_parents": [],
+    "type": "task"
+  },
+  "tool": {
+    "llm": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "model": "gpt-4.1"
+      },
+      "metric_keys": [
+        "completion_reasoning_tokens",
+        "completion_tokens",
+        "prompt_cached_tokens",
+        "prompt_tokens",
+        "reasoning_tokens",
+        "tokens"
+      ],
+      "name": "github.copilot.llm",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:9>",
+      "span_parents": [
+        "<span:8>"
+      ],
+      "type": "llm"
+    },
+    "operation": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "github-copilot-tool-operation",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:6>",
+      "span_parents": [
+        "<span:1>"
+      ],
+      "type": null
+    },
+    "session": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "github_copilot.end_reason": "complete",
+        "github_copilot.model": "gpt-4.1"
+      },
+      "metric_keys": [],
+      "name": "Copilot Session",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:7>",
+      "span_parents": [
+        "<span:6>"
+      ],
+      "type": "task"
+    },
+    "tool": null,
+    "turn": {
+      "has_input": false,
+      "has_output": true,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "Copilot Turn",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:8>",
+      "span_parents": [
+        "<span:7>"
+      ],
+      "type": "task"
+    }
+  }
+}
diff --git a/e2e/scenarios/github-copilot-instrumentation/__snapshots__/github-copilot-v0-wrapped.span-events.json b/e2e/scenarios/github-copilot-instrumentation/__snapshots__/github-copilot-v0-wrapped.span-events.json
new file mode 100644
index 000000000..c7678cc5d
--- /dev/null
+++ b/e2e/scenarios/github-copilot-instrumentation/__snapshots__/github-copilot-v0-wrapped.span-events.json
@@ -0,0 +1,147 @@
+{
+  "basic": {
+    "llm": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "model": "gpt-4.1"
+      },
+      "metric_keys": [
+        "completion_reasoning_tokens",
+        "completion_tokens",
+        "prompt_tokens",
+        "reasoning_tokens",
+        "tokens"
+      ],
+      "name": "github.copilot.llm",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:5>",
+      "span_parents": [
+        "<span:4>"
+      ],
+      "type": "llm"
+    },
+    "operation": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "github-copilot-basic-operation",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:2>",
+      "span_parents": [
+        "<span:1>"
+      ],
+      "type": null
+    },
+    "session": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "github_copilot.end_reason": "complete",
+        "github_copilot.model": "gpt-4.1"
+      },
+      "metric_keys": [],
+      "name": "Copilot Session",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:3>",
+      "span_parents": [
+        "<span:2>"
+      ],
+      "type": "task"
+    },
+    "turn": {
+      "has_input": true,
+      "has_output": true,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "Copilot Turn",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:4>",
+      "span_parents": [
+        "<span:3>"
+      ],
+      "type": "task"
+    }
+  },
+  "root": {
+    "has_input": false,
+    "has_output": false,
+    "metadata": {
+      "scenario": "github-copilot-instrumentation"
+    },
+    "metric_keys": [],
+    "name": "github-copilot-instrumentation-root",
+    "root_span_id": "<span:1>",
+    "span_id": "<span:1>",
+    "span_parents": [],
+    "type": "task"
+  },
+  "tool": {
+    "llm": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "model": "gpt-4.1"
+      },
+      "metric_keys": [
+        "completion_reasoning_tokens",
+        "completion_tokens",
+        "prompt_cached_tokens",
+        "prompt_tokens",
+        "reasoning_tokens",
+        "tokens"
+      ],
+      "name": "github.copilot.llm",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:9>",
+      "span_parents": [
+        "<span:8>"
+      ],
+      "type": "llm"
+    },
+    "operation": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "github-copilot-tool-operation",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:6>",
+      "span_parents": [
+        "<span:1>"
+      ],
+      "type": null
+    },
+    "session": {
+      "has_input": false,
+      "has_output": false,
+      "metadata": {
+        "github_copilot.end_reason": "complete",
+        "github_copilot.model": "gpt-4.1"
+      },
+      "metric_keys": [],
+      "name": "Copilot Session",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:7>",
+      "span_parents": [
+        "<span:6>"
+      ],
+      "type": "task"
+    },
+    "tool": null,
+    "turn": {
+      "has_input": false,
+      "has_output": true,
+      "metadata": null,
+      "metric_keys": [],
+      "name": "Copilot Turn",
+      "root_span_id": "<span:1>",
+      "span_id": "<span:8>",
+      "span_parents": [
+        "<span:7>"
+      ],
+      "type": "task"
+    }
+  }
+}
diff --git a/e2e/scenarios/github-copilot-instrumentation/assertions.ts b/e2e/scenarios/github-copilot-instrumentation/assertions.ts
index ee706c9f2..2d4ec9042 100644
--- a/e2e/scenarios/github-copilot-instrumentation/assertions.ts
+++ b/e2e/scenarios/github-copilot-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -235,9 +236,10 @@ export function defineGitHubCopilotInstrumentationAssertions(options: {
     });
 
     test("matches the span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildSpanSummary(events)),
-      ).toMatchFileSnapshot(snapshotPath);
+        snapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/github-copilot-instrumentation/scenario.test.ts b/e2e/scenarios/github-copilot-instrumentation/scenario.test.ts
index 7b4d793ad..7fe0a87f2 100644
--- a/e2e/scenarios/github-copilot-instrumentation/scenario.test.ts
+++ b/e2e/scenarios/github-copilot-instrumentation/scenario.test.ts
@@ -7,6 +7,9 @@ import {
 import { defineGitHubCopilotInstrumentationAssertions } from "./assertions";
 import { GITHUB_COPILOT_SCENARIO_TIMEOUT_MS } from "./constants.mjs";
 
+const hasCopilotKey =
+  !!process.env.COPILOT_API_KEY || !!process.env.BRAINTRUST_E2E_MODEL_BASE_URL;
+
 const scenarioDir = await prepareScenarioDir({
   scenarioDir: resolveScenarioDir(import.meta.url),
 });
@@ -15,35 +18,38 @@ const copilotSdkVersion = await readInstalledPackageVersion(
   "@github/copilot-sdk",
 );
 
-describe(`github copilot sdk ${copilotSdkVersion}`, () => {
-  defineGitHubCopilotInstrumentationAssertions({
-    name: "wrapped instrumentation",
-    runScenario: async ({ runScenarioDir }) => {
-      await runScenarioDir({
-        entry: "scenario.ts",
-        runContext: { variantKey: "github-copilot-v0-wrapped" },
-        scenarioDir,
-        timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
-      });
-    },
-    snapshotName: "github-copilot-v0-wrapped",
-    testFileUrl: import.meta.url,
-    timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
-  });
+describe.skipIf(!hasCopilotKey)(
+  `github copilot sdk ${copilotSdkVersion}`,
+  () => {
+    defineGitHubCopilotInstrumentationAssertions({
+      name: "wrapped instrumentation",
+      runScenario: async ({ runScenarioDir }) => {
+        await runScenarioDir({
+          entry: "scenario.ts",
+          runContext: { variantKey: "github-copilot-v0-wrapped" },
+          scenarioDir,
+          timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
+        });
+      },
+      snapshotName: "github-copilot-v0-wrapped",
+      testFileUrl: import.meta.url,
+      timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
+    });
 
-  defineGitHubCopilotInstrumentationAssertions({
-    name: "auto-hook instrumentation",
-    runScenario: async ({ runNodeScenarioDir }) => {
-      await runNodeScenarioDir({
-        entry: "scenario.mjs",
-        nodeArgs: ["--import", "braintrust/hook.mjs"],
-        runContext: { variantKey: "github-copilot-v0-auto" },
-        scenarioDir,
-        timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
-      });
-    },
-    snapshotName: "github-copilot-v0-auto",
-    testFileUrl: import.meta.url,
-    timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
-  });
-});
+    defineGitHubCopilotInstrumentationAssertions({
+      name: "auto-hook instrumentation",
+      runScenario: async ({ runNodeScenarioDir }) => {
+        await runNodeScenarioDir({
+          entry: "scenario.mjs",
+          nodeArgs: ["--import", "braintrust/hook.mjs"],
+          runContext: { variantKey: "github-copilot-v0-auto" },
+          scenarioDir,
+          timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
+        });
+      },
+      snapshotName: "github-copilot-v0-auto",
+      testFileUrl: import.meta.url,
+      timeoutMs: GITHUB_COPILOT_SCENARIO_TIMEOUT_MS,
+    });
+  },
+);
diff --git a/e2e/scenarios/google-adk-instrumentation/__cassettes__/google-adk-v061.cassette.json b/e2e/scenarios/google-adk-instrumentation/__cassettes__/google-adk-v061.cassette.json
new file mode 100644
index 000000000..138030d89
--- /dev/null
+++ b/e2e/scenarios/google-adk-instrumentation/__cassettes__/google-adk-v061.cassette.json
@@ -0,0 +1,257 @@
+{
+  "entries": [
+    {
+      "callIndex": 0,
+      "id": "ecdbd469610aca8b",
+      "matchKey": "POST generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent",
+      "recordedAt": "2026-05-07T21:22:52.090Z",
+      "request": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "contents": [
+              {
+                "parts": [
+                  {
+                    "text": "What is the weather in Paris, France?"
+                  }
+                ],
+                "role": "user"
+              }
+            ],
+            "generationConfig": {
+              "temperature": 0
+            },
+            "systemInstruction": {
+              "parts": [
+                {
+                  "text": "You are an agent. Your internal name is \"weather_agent\".\n\nFor weather questions, first call the get_weather tool exactly once, then answer with the tool result in one short sentence. Do not answer from memory and do not call any tool after you have a tool result."
+                }
+              ],
+              "role": "user"
+            },
+            "tools": [
+              {
+                "functionDeclarations": [
+                  {
+                    "description": "Get the current weather in a given location",
+                    "name": "get_weather",
+                    "parameters": {
+                      "properties": {
+                        "location": {
+                          "description": "The city and country to look up",
+                          "type": "STRING"
+                        }
+                      },
+                      "required": ["location"],
+                      "type": "OBJECT"
+                    }
+                  }
+                ]
+              }
+            ]
+          }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent"
+      },
+      "response": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "candidates": [
+              {
+                "content": {
+                  "parts": [
+                    {
+                      "functionCall": {
+                        "args": {
+                          "location": "Paris, France"
+                        },
+                        "name": "get_weather"
+                      }
+                    }
+                  ],
+                  "role": "model"
+                },
+                "finishMessage": "Model generated function call(s).",
+                "finishReason": "STOP",
+                "index": 0
+              }
+            ],
+            "modelVersion": "gemini-2.5-flash-lite",
+            "responseId": "qwL9aee0NPTM-sAP8qfteQ",
+            "usageMetadata": {
+              "candidatesTokenCount": 17,
+              "promptTokenCount": 115,
+              "promptTokensDetails": [
+                {
+                  "modality": "TEXT",
+                  "tokenCount": 115
+                }
+              ],
+              "serviceTier": "standard",
+              "totalTokenCount": 132
+            }
+          }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+          "content-encoding": "gzip",
+          "content-length": "377",
+          "content-type": "application/json; charset=UTF-8",
+          "date": "Thu, 07 May 2026 21:22:52 GMT",
+          "server": "scaffolding on HTTPServer2",
+          "server-timing": "gfet4t7; dur=603",
+          "vary": "Origin, X-Origin, Referer",
+          "x-content-type-options": "nosniff",
+          "x-frame-options": "SAMEORIGIN",
+          "x-gemini-service-tier": "standard",
+          "x-xss-protection": "0"
+        },
+        "status": 200
+      }
+    },
+    {
+      "callIndex": 1,
+      "id": "57c53193f8eaebc1",
+      "matchKey": "POST generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent",
+      "recordedAt": "2026-05-07T21:22:52.949Z",
+      "request": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "contents": [
+              {
+                "parts": [
+                  {
+                    "text": "What is the weather in Paris, France?"
+                  }
+                ],
+                "role": "user"
+              },
+              {
+                "parts": [
+                  {
+                    "functionCall": {
+                      "args": {
+                        "location": "Paris, France"
+                      },
+                      "name": "get_weather"
+                    }
+                  }
+                ],
+                "role": "model"
+              },
+              {
+                "parts": [
+                  {
+                    "functionResponse": {
+                      "name": "get_weather",
+                      "response": {
+                        "condition": "sunny",
+                        "location": "Paris, France",
+                        "temperature": 72
+                      }
+                    }
+                  }
+                ],
+                "role": "user"
+              }
+            ],
+            "generationConfig": {
+              "temperature": 0
+            },
+            "systemInstruction": {
+              "parts": [
+                {
+                  "text": "You are an agent. Your internal name is \"weather_agent\".\n\nFor weather questions, first call the get_weather tool exactly once, then answer with the tool result in one short sentence. Do not answer from memory and do not call any tool after you have a tool result."
+                }
+              ],
+              "role": "user"
+            },
+            "tools": [
+              {
+                "functionDeclarations": [
+                  {
+                    "description": "Get the current weather in a given location",
+                    "name": "get_weather",
+                    "parameters": {
+                      "properties": {
+                        "location": {
+                          "description": "The city and country to look up",
+                          "type": "STRING"
+                        }
+                      },
+                      "required": ["location"],
+                      "type": "OBJECT"
+                    }
+                  }
+                ]
+              }
+            ]
+          }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent"
+      },
+      "response": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "candidates": [
+              {
+                "content": {
+                  "parts": [
+                    {
+                      "text": "The weather in Paris, France is sunny with a temperature of 72 degrees."
+                    }
+                  ],
+                  "role": "model"
+                },
+                "finishReason": "STOP",
+                "index": 0
+              }
+            ],
+            "modelVersion": "gemini-2.5-flash-lite",
+            "responseId": "rAL9acrtKsCZ_uMP74Xy6Ac",
+            "usageMetadata": {
+              "candidatesTokenCount": 17,
+              "promptTokenCount": 162,
+              "promptTokensDetails": [
+                {
+                  "modality": "TEXT",
+                  "tokenCount": 162
+                }
+              ],
+              "serviceTier": "standard",
+              "totalTokenCount": 179
+            }
+          }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+          "content-encoding": "gzip",
+          "content-length": "346",
+          "content-type": "application/json; charset=UTF-8",
+          "date": "Thu, 07 May 2026 21:22:52 GMT",
+          "server": "scaffolding on HTTPServer2",
+          "server-timing": "gfet4t7; dur=747",
+          "vary": "Origin, X-Origin, Referer",
+          "x-content-type-options": "nosniff",
+          "x-frame-options": "SAMEORIGIN",
+          "x-gemini-service-tier": "standard",
+          "x-xss-protection": "0"
+        },
+        "status": 200
+      }
+    }
+  ],
+  "meta": {
+    "createdAt": "2026-05-07T17:33:24.316Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
+}
diff --git a/e2e/scenarios/google-adk-instrumentation/__cassettes__/google-adk-v1000.cassette.json b/e2e/scenarios/google-adk-instrumentation/__cassettes__/google-adk-v1000.cassette.json
new file mode 100644
index 000000000..084e06dfd
--- /dev/null
+++ b/e2e/scenarios/google-adk-instrumentation/__cassettes__/google-adk-v1000.cassette.json
@@ -0,0 +1,257 @@
+{
+  "entries": [
+    {
+      "callIndex": 0,
+      "id": "ecdbd469610aca8b",
+      "matchKey": "POST generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent",
+      "recordedAt": "2026-05-07T21:23:20.914Z",
+      "request": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "contents": [
+              {
+                "parts": [
+                  {
+                    "text": "What is the weather in Paris, France?"
+                  }
+                ],
+                "role": "user"
+              }
+            ],
+            "generationConfig": {
+              "temperature": 0
+            },
+            "systemInstruction": {
+              "parts": [
+                {
+                  "text": "You are an agent. Your internal name is \"weather_agent\".\n\nFor weather questions, first call the get_weather tool exactly once, then answer with the tool result in one short sentence. Do not answer from memory and do not call any tool after you have a tool result."
+                }
+              ],
+              "role": "user"
+            },
+            "tools": [
+              {
+                "functionDeclarations": [
+                  {
+                    "description": "Get the current weather in a given location",
+                    "name": "get_weather",
+                    "parameters": {
+                      "properties": {
+                        "location": {
+                          "description": "The city and country to look up",
+                          "type": "STRING"
+                        }
+                      },
+                      "required": ["location"],
+                      "type": "OBJECT"
+                    }
+                  }
+                ]
+              }
+            ]
+          }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent"
+      },
+      "response": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "candidates": [
+              {
+                "content": {
+                  "parts": [
+                    {
+                      "functionCall": {
+                        "args": {
+                          "location": "Paris, France"
+                        },
+                        "name": "get_weather"
+                      }
+                    }
+                  ],
+                  "role": "model"
+                },
+                "finishMessage": "Model generated function call(s).",
+                "finishReason": "STOP",
+                "index": 0
+              }
+            ],
+            "modelVersion": "gemini-2.5-flash-lite",
+            "responseId": "yAL9afzxI8mU_uMPtNuVgAg",
+            "usageMetadata": {
+              "candidatesTokenCount": 17,
+              "promptTokenCount": 115,
+              "promptTokensDetails": [
+                {
+                  "modality": "TEXT",
+                  "tokenCount": 115
+                }
+              ],
+              "serviceTier": "standard",
+              "totalTokenCount": 132
+            }
+          }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+          "content-encoding": "gzip",
+          "content-length": "380",
+          "content-type": "application/json; charset=UTF-8",
+          "date": "Thu, 07 May 2026 21:23:20 GMT",
+          "server": "scaffolding on HTTPServer2",
+          "server-timing": "gfet4t7; dur=4682",
+          "vary": "Origin, X-Origin, Referer",
+          "x-content-type-options": "nosniff",
+          "x-frame-options": "SAMEORIGIN",
+          "x-gemini-service-tier": "standard",
+          "x-xss-protection": "0"
+        },
+        "status": 200
+      }
+    },
+    {
+      "callIndex": 1,
+      "id": "57c53193f8eaebc1",
+      "matchKey": "POST generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent",
+      "recordedAt": "2026-05-07T21:23:21.799Z",
+      "request": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "contents": [
+              {
+                "parts": [
+                  {
+                    "text": "What is the weather in Paris, France?"
+                  }
+                ],
+                "role": "user"
+              },
+              {
+                "parts": [
+                  {
+                    "functionCall": {
+                      "args": {
+                        "location": "Paris, France"
+                      },
+                      "name": "get_weather"
+                    }
+                  }
+                ],
+                "role": "model"
+              },
+              {
+                "parts": [
+                  {
+                    "functionResponse": {
+                      "name": "get_weather",
+                      "response": {
+                        "condition": "sunny",
+                        "location": "Paris, France",
+                        "temperature": 72
+                      }
+                    }
+                  }
+                ],
+                "role": "user"
+              }
+            ],
+            "generationConfig": {
+              "temperature": 0
+            },
+            "systemInstruction": {
+              "parts": [
+                {
+                  "text": "You are an agent. Your internal name is \"weather_agent\".\n\nFor weather questions, first call the get_weather tool exactly once, then answer with the tool result in one short sentence. Do not answer from memory and do not call any tool after you have a tool result."
+                }
+              ],
+              "role": "user"
+            },
+            "tools": [
+              {
+                "functionDeclarations": [
+                  {
+                    "description": "Get the current weather in a given location",
+                    "name": "get_weather",
+                    "parameters": {
+                      "properties": {
+                        "location": {
+                          "description": "The city and country to look up",
+                          "type": "STRING"
+                        }
+                      },
+                      "required": ["location"],
+                      "type": "OBJECT"
+                    }
+                  }
+                ]
+              }
+            ]
+          }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent"
+      },
+      "response": {
+        "body": {
+          "kind": "json",
+          "value": {
+            "candidates": [
+              {
+                "content": {
+                  "parts": [
+                    {
+                      "text": "The weather in Paris, France is sunny with a temperature of 72 degrees."
+                    }
+                  ],
+                  "role": "model"
+                },
+                "finishReason": "STOP",
+                "index": 0
+              }
+            ],
+            "modelVersion": "gemini-2.5-flash-lite",
+            "responseId": "yQL9acjNI8_JjMcP7ZqTiQQ",
+            "usageMetadata": {
+              "candidatesTokenCount": 17,
+              "promptTokenCount": 162,
+              "promptTokensDetails": [
+                {
+                  "modality": "TEXT",
+                  "tokenCount": 162
+                }
+              ],
+              "serviceTier": "standard",
+              "totalTokenCount": 179
+            }
+          }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+          "content-encoding": "gzip",
+          "content-length": "348",
+          "content-type": "application/json; charset=UTF-8",
+          "date": "Thu, 07 May 2026 21:23:21 GMT",
+          "server": "scaffolding on HTTPServer2",
+          "server-timing": "gfet4t7; dur=831",
+          "vary": "Origin, X-Origin, Referer",
+          "x-content-type-options": "nosniff",
+          "x-frame-options": "SAMEORIGIN",
+          "x-gemini-service-tier": "standard",
+          "x-xss-protection": "0"
+        },
+        "status": 200
+      }
+    }
+  ],
+  "meta": {
+    "createdAt": "2026-05-07T17:34:20.722Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
+}
diff --git a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.log-payloads.json b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.log-payloads.json
index 406961eca..ae0c41d40 100644
--- a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.log-payloads.json
+++ b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.log-payloads.json
@@ -14,6 +14,7 @@
       "operation": "simple-run"
     },
     "metrics": {
+      "end": 0,
       "start": 0
     },
     "name": "adk-simple-run-operation",
@@ -34,7 +35,12 @@
       "provider": "google-adk"
     },
     "metrics": {
-      "start": 0
+      "completion_tokens": "<number>",
+      "duration": 0,
+      "end": 0,
+      "prompt_tokens": "<number>",
+      "start": 0,
+      "tokens": "<number>"
     },
     "name": "Google ADK Runner",
     "type": "task"
@@ -46,6 +52,8 @@
       "provider": "google-adk"
     },
     "metrics": {
+      "duration": 0,
+      "end": 0,
       "start": 0
     },
     "name": "Agent: weather_agent",
@@ -73,56 +81,6 @@
     },
     "type": "tool"
   },
-  {
-    "metadata": {
-      "google_adk.agent_name": "weather_agent",
-      "model": "gemini-2.5-flash-lite",
-      "provider": "google-adk"
-    },
-    "metrics": {
-      "duration": 0,
-      "end": 0,
-      "start": 0
-    },
-    "name": "Agent: weather_agent",
-    "type": "task"
-  },
-  {
-    "input": {
-      "messages": [
-        {
-          "content": "What is the weather in Paris, France?",
-          "role": "user"
-        }
-      ]
-    },
-    "metadata": {
-      "google_adk.session_id": "test-session-1",
-      "google_adk.user_id": "test-user",
-      "provider": "google-adk"
-    },
-    "metrics": {
-      "completion_tokens": "<number>",
-      "duration": 0,
-      "end": 0,
-      "prompt_tokens": "<number>",
-      "start": 0,
-      "tokens": "<number>"
-    },
-    "name": "Google ADK Runner",
-    "type": "task"
-  },
-  {
-    "metadata": {
-      "operation": "simple-run"
-    },
-    "metrics": {
-      "end": 0,
-      "start": 0
-    },
-    "name": "adk-simple-run-operation",
-    "type": null
-  },
   {
     "metadata": {
       "scenario": "google-adk-instrumentation"
diff --git a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.span-events.json b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.span-events.json
index 2bf665c39..b5f28e218 100644
--- a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.span-events.json
+++ b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v061.span-events.json
@@ -34,7 +34,12 @@
       "google_adk.user_id": "test-user",
       "provider": "google-adk"
     },
-    "metric_keys": [],
+    "metric_keys": [
+      "completion_tokens",
+      "duration",
+      "prompt_tokens",
+      "tokens"
+    ],
     "name": "Google ADK Runner",
     "root_span_id": "<span:1>",
     "span_id": "<span:3>",
@@ -50,7 +55,9 @@
       "model": "gemini-2.5-flash-lite",
       "provider": "google-adk"
     },
-    "metric_keys": [],
+    "metric_keys": [
+      "duration"
+    ],
     "name": "Agent: weather_agent",
     "root_span_id": "<span:1>",
     "span_id": "<span:4>",
@@ -77,44 +84,5 @@
       "<span:4>"
     ],
     "type": "tool"
-  },
-  {
-    "has_input": false,
-    "metadata": {
-      "google_adk.agent_name": "weather_agent",
-      "model": "gemini-2.5-flash-lite",
-      "provider": "google-adk"
-    },
-    "metric_keys": [
-      "duration"
-    ],
-    "name": "Agent: weather_agent",
-    "root_span_id": "<span:1>",
-    "span_id": "<span:4>",
-    "span_parents": [
-      "<span:3>"
-    ],
-    "type": "task"
-  },
-  {
-    "has_input": true,
-    "metadata": {
-      "google_adk.session_id": "test-session-1",
-      "google_adk.user_id": "test-user",
-      "provider": "google-adk"
-    },
-    "metric_keys": [
-      "completion_tokens",
-      "duration",
-      "prompt_tokens",
-      "tokens"
-    ],
-    "name": "Google ADK Runner",
-    "root_span_id": "<span:1>",
-    "span_id": "<span:3>",
-    "span_parents": [
-      "<span:2>"
-    ],
-    "type": "task"
   }
 ]
diff --git a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.log-payloads.json b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.log-payloads.json
index 406961eca..ae0c41d40 100644
--- a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.log-payloads.json
+++ b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.log-payloads.json
@@ -14,6 +14,7 @@
       "operation": "simple-run"
     },
     "metrics": {
+      "end": 0,
       "start": 0
     },
     "name": "adk-simple-run-operation",
@@ -34,7 +35,12 @@
       "provider": "google-adk"
     },
     "metrics": {
-      "start": 0
+      "completion_tokens": "<number>",
+      "duration": 0,
+      "end": 0,
+      "prompt_tokens": "<number>",
+      "start": 0,
+      "tokens": "<number>"
     },
     "name": "Google ADK Runner",
     "type": "task"
@@ -46,6 +52,8 @@
       "provider": "google-adk"
     },
     "metrics": {
+      "duration": 0,
+      "end": 0,
       "start": 0
     },
     "name": "Agent: weather_agent",
@@ -73,56 +81,6 @@
     },
     "type": "tool"
   },
-  {
-    "metadata": {
-      "google_adk.agent_name": "weather_agent",
-      "model": "gemini-2.5-flash-lite",
-      "provider": "google-adk"
-    },
-    "metrics": {
-      "duration": 0,
-      "end": 0,
-      "start": 0
-    },
-    "name": "Agent: weather_agent",
-    "type": "task"
-  },
-  {
-    "input": {
-      "messages": [
-        {
-          "content": "What is the weather in Paris, France?",
-          "role": "user"
-        }
-      ]
-    },
-    "metadata": {
-      "google_adk.session_id": "test-session-1",
-      "google_adk.user_id": "test-user",
-      "provider": "google-adk"
-    },
-    "metrics": {
-      "completion_tokens": "<number>",
-      "duration": 0,
-      "end": 0,
-      "prompt_tokens": "<number>",
-      "start": 0,
-      "tokens": "<number>"
-    },
-    "name": "Google ADK Runner",
-    "type": "task"
-  },
-  {
-    "metadata": {
-      "operation": "simple-run"
-    },
-    "metrics": {
-      "end": 0,
-      "start": 0
-    },
-    "name": "adk-simple-run-operation",
-    "type": null
-  },
   {
     "metadata": {
       "scenario": "google-adk-instrumentation"
diff --git a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.span-events.json b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.span-events.json
index 2bf665c39..b5f28e218 100644
--- a/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.span-events.json
+++ b/e2e/scenarios/google-adk-instrumentation/__snapshots__/google-adk-v1000.span-events.json
@@ -34,7 +34,12 @@
       "google_adk.user_id": "test-user",
       "provider": "google-adk"
     },
-    "metric_keys": [],
+    "metric_keys": [
+      "completion_tokens",
+      "duration",
+      "prompt_tokens",
+      "tokens"
+    ],
     "name": "Google ADK Runner",
     "root_span_id": "<span:1>",
     "span_id": "<span:3>",
@@ -50,7 +55,9 @@
       "model": "gemini-2.5-flash-lite",
       "provider": "google-adk"
     },
-    "metric_keys": [],
+    "metric_keys": [
+      "duration"
+    ],
     "name": "Agent: weather_agent",
     "root_span_id": "<span:1>",
     "span_id": "<span:4>",
@@ -77,44 +84,5 @@
       "<span:4>"
     ],
     "type": "tool"
-  },
-  {
-    "has_input": false,
-    "metadata": {
-      "google_adk.agent_name": "weather_agent",
-      "model": "gemini-2.5-flash-lite",
-      "provider": "google-adk"
-    },
-    "metric_keys": [
-      "duration"
-    ],
-    "name": "Agent: weather_agent",
-    "root_span_id": "<span:1>",
-    "span_id": "<span:4>",
-    "span_parents": [
-      "<span:3>"
-    ],
-    "type": "task"
-  },
-  {
-    "has_input": true,
-    "metadata": {
-      "google_adk.session_id": "test-session-1",
-      "google_adk.user_id": "test-user",
-      "provider": "google-adk"
-    },
-    "metric_keys": [
-      "completion_tokens",
-      "duration",
-      "prompt_tokens",
-      "tokens"
-    ],
-    "name": "Google ADK Runner",
-    "root_span_id": "<span:1>",
-    "span_id": "<span:3>",
-    "span_parents": [
-      "<span:2>"
-    ],
-    "type": "task"
   }
 ]
diff --git a/e2e/scenarios/google-adk-instrumentation/assertions.ts b/e2e/scenarios/google-adk-instrumentation/assertions.ts
index 1e6d4c2b5..c0b1a2b3b 100644
--- a/e2e/scenarios/google-adk-instrumentation/assertions.ts
+++ b/e2e/scenarios/google-adk-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -305,7 +306,8 @@ export function defineGoogleADKInstrumentationAssertions(options: {
         ) as Json,
       );
 
-      await expect(formatJsonFileSnapshot(spanSummary)).toMatchFileSnapshot(
+      await matchFileSnapshot(
+        formatJsonFileSnapshot(spanSummary),
         spanSnapshotPath,
       );
     });
@@ -323,7 +325,8 @@ export function defineGoogleADKInstrumentationAssertions(options: {
         ) as Json,
       );
 
-      await expect(formatJsonFileSnapshot(payloadSummary)).toMatchFileSnapshot(
+      await matchFileSnapshot(
+        formatJsonFileSnapshot(payloadSummary),
         payloadSnapshotPath,
       );
     });
diff --git a/e2e/scenarios/google-adk-instrumentation/cassette-filter.mjs b/e2e/scenarios/google-adk-instrumentation/cassette-filter.mjs
new file mode 100644
index 000000000..64d540de7
--- /dev/null
+++ b/e2e/scenarios/google-adk-instrumentation/cassette-filter.mjs
@@ -0,0 +1,13 @@
+// @ts-check
+/** @type {import("@braintrust/seinfeld").FilterSpec} */
+export const filter = [
+  "default",
+  {
+    // Strip the Google API key from URL query params before matching.
+    ignoreQueryParams: ["key"],
+    // Ignore all body fields — conversation history contains volatile tool
+    // call IDs (functionCall.id) that change every run. callIndex is the
+    // sole discriminator, which is stable as long as call order is stable.
+    ignoreBodyFields: ["**"],
+  },
+];
diff --git a/e2e/scenarios/google-genai-instrumentation/assertions.ts b/e2e/scenarios/google-genai-instrumentation/assertions.ts
index a23bc5a84..77f56f47b 100644
--- a/e2e/scenarios/google-genai-instrumentation/assertions.ts
+++ b/e2e/scenarios/google-genai-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -647,15 +648,17 @@ export function defineGoogleGenAIInstrumentationAssertions(options: {
     });
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildSpanSummary(events)),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
 
     test("matches the shared payload snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildPayloadSummary(events)),
-      ).toMatchFileSnapshot(payloadSnapshotPath);
+        payloadSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/groq-instrumentation/__cassettes__/groq-v1-auto.cassette.json b/e2e/scenarios/groq-instrumentation/__cassettes__/groq-v1-auto.cassette.json
index b16b4e24b..ee0893842 100644
--- a/e2e/scenarios/groq-instrumentation/__cassettes__/groq-v1-auto.cassette.json
+++ b/e2e/scenarios/groq-instrumentation/__cassettes__/groq-v1-auto.cassette.json
@@ -1,22 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-28T23:26:10.191Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "3dffad7c90a4c3b7",
       "matchKey": "POST api.groq.com/openai/v1/chat/completions",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:26:10.191Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.groq.com/openai/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -30,18 +19,12 @@
             "model": "llama-3.3-70b-versatile",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.groq.com/openai/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "cache-control": "private, max-age=0, no-store, no-cache, must-revalidate",
-          "content-type": "application/json",
-          "vary": "Origin",
-          "x-groq-region": "yka"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -77,21 +60,24 @@
               "seed": 791665023
             }
           }
-        }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "cache-control": "private, max-age=0, no-store, no-cache, must-revalidate",
+          "content-type": "application/json",
+          "vary": "Origin",
+          "x-groq-region": "yka"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "cfcb31431404c5e9",
       "matchKey": "POST api.groq.com/openai/v1/chat/completions",
-      "callIndex": 1,
       "recordedAt": "2026-04-28T23:26:10.191Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.groq.com/openai/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -105,11 +91,21 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.groq.com/openai/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"chatcmpl-816c178a-d48e-427a-9d43-b297ce642dca\",\"object\":\"chat.completion.chunk\",\"created\":1777418770,\"model\":\"llama-3.3-70b-versatile\",\"system_fingerprint\":\"fp_d42c28f9ce\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\"},\"logprobs\":null,\"finish_reason\":null}],\"x_groq\":{\"id\":\"req_01kqb6m5h0ensv6tyv4s6trne8\",\"seed\":404224346}}",
+            "data: {\"id\":\"chatcmpl-816c178a-d48e-427a-9d43-b297ce642dca\",\"object\":\"chat.completion.chunk\",\"created\":1777418770,\"model\":\"llama-3.3-70b-versatile\",\"system_fingerprint\":\"fp_d42c28f9ce\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"STREAM\"},\"logprobs\":null,\"finish_reason\":null}]}",
+            "data: {\"id\":\"chatcmpl-816c178a-d48e-427a-9d43-b297ce642dca\",\"object\":\"chat.completion.chunk\",\"created\":1777418770,\"model\":\"llama-3.3-70b-versatile\",\"system_fingerprint\":\"fp_d42c28f9ce\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"x_groq\":{\"id\":\"req_01kqb6m5h0ensv6tyv4s6trne8\",\"usage\":{\"queue_time\":0.071718519,\"prompt_tokens\":40,\"prompt_time\":0.0032231,\"completion_tokens\":2,\"completion_time\":0.014202935,\"total_tokens\":42,\"total_time\":0.017426035}},\"usage\":{\"queue_time\":0.071718519,\"prompt_tokens\":40,\"prompt_time\":0.0032231,\"completion_tokens\":2,\"completion_time\":0.014202935,\"total_tokens\":42,\"total_time\":0.017426035}}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
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@@ -154,11 +138,21 @@
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@@ -226,18 +207,12 @@
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index 993dd860a..c99440c64 100644
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+++ b/e2e/scenarios/groq-instrumentation/__cassettes__/groq-v1-wrapped.cassette.json
@@ -1,22 +1,11 @@
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@@ -30,18 +19,12 @@
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+        "method": "POST",
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@@ -154,11 +138,21 @@
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@@ -226,18 +207,12 @@
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+  "version": 1
 }
diff --git a/e2e/scenarios/groq-instrumentation/assertions.ts b/e2e/scenarios/groq-instrumentation/assertions.ts
index 0087f18a8..1d7e9f0b8 100644
--- a/e2e/scenarios/groq-instrumentation/assertions.ts
+++ b/e2e/scenarios/groq-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import type { Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -197,9 +198,10 @@ export function defineGroqInstrumentationAssertions(options: {
     });
 
     test("matches span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildSpanSummary(events)),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/huggingface-instrumentation/__cassettes__/huggingface-v281.cassette.json b/e2e/scenarios/huggingface-instrumentation/__cassettes__/huggingface-v281.cassette.json
index 9ffb57fa0..92e41356d 100644
--- a/e2e/scenarios/huggingface-instrumentation/__cassettes__/huggingface-v281.cassette.json
+++ b/e2e/scenarios/huggingface-instrumentation/__cassettes__/huggingface-v281.cassette.json
@@ -1,21 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-28T23:26:31.789Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "0c8ac8ab9b5a4b7b",
       "matchKey": "POST router.huggingface.co/v1/chat/completions",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:26:31.789Z",
       "request": {
-        "method": "POST",
-        "url": "https://router.huggingface.co/v1/chat/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -29,40 +19,12 @@
             "model": "meta-llama/Llama-3.1-8B-Instruct",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://router.huggingface.co/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-allow-origin": "*",
-          "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
-          "content-type": "application/json",
-          "cross-origin-opener-policy": "same-origin",
-          "inference-id": "chatcmpl-7509cd26-39fe-4d81-99f8-cada665429a6",
-          "referrer-policy": "strict-origin-when-cross-origin",
-          "vary": "Origin",
-          "via": "1.1 09701f8b2a1866d72a24a6230bb8aac8.cloudfront.net (CloudFront)",
-          "x-amz-cf-id": "FYz5kyt43qFq8HPOCIZCf8c9AXbgPEpRVTMz2Ejm3IPg6ypu76UhgA==",
-          "x-amz-cf-pop": "YVR52-P2",
-          "x-cache": "Miss from cloudfront",
-          "x-content-type-options": "nosniff",
-          "x-inference-provider": "cerebras",
-          "x-powered-by": "huggingface-moon",
-          "x-ratelimit-limit-requests-day": "2880000",
-          "x-ratelimit-limit-requests-hour": "120000",
-          "x-ratelimit-limit-requests-minute": "2000",
-          "x-ratelimit-limit-tokens-day": "9223372036854775807",
-          "x-ratelimit-limit-tokens-hour": "9223372036854775807",
-          "x-ratelimit-limit-tokens-minute": "9223372036854775807",
-          "x-ratelimit-remaining-requests-day": "2879998",
-          "x-ratelimit-remaining-requests-hour": "119998",
-          "x-ratelimit-remaining-requests-minute": "1998",
-          "x-ratelimit-remaining-tokens-day": "9223372036854767616",
-          "x-ratelimit-remaining-tokens-hour": "9223372036854767616",
-          "x-ratelimit-remaining-tokens-minute": "9223372036854767616",
-          "x-robots-tag": "none"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -102,20 +64,46 @@
               "total_tokens": 43
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-allow-origin": "*",
+          "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
+          "content-type": "application/json",
+          "cross-origin-opener-policy": "same-origin",
+          "inference-id": "chatcmpl-7509cd26-39fe-4d81-99f8-cada665429a6",
+          "referrer-policy": "strict-origin-when-cross-origin",
+          "vary": "Origin",
+          "via": "1.1 09701f8b2a1866d72a24a6230bb8aac8.cloudfront.net (CloudFront)",
+          "x-amz-cf-id": "FYz5kyt43qFq8HPOCIZCf8c9AXbgPEpRVTMz2Ejm3IPg6ypu76UhgA==",
+          "x-amz-cf-pop": "YVR52-P2",
+          "x-cache": "Miss from cloudfront",
+          "x-content-type-options": "nosniff",
+          "x-inference-provider": "cerebras",
+          "x-powered-by": "huggingface-moon",
+          "x-ratelimit-limit-requests-day": "2880000",
+          "x-ratelimit-limit-requests-hour": "120000",
+          "x-ratelimit-limit-requests-minute": "2000",
+          "x-ratelimit-limit-tokens-day": "9223372036854775807",
+          "x-ratelimit-limit-tokens-hour": "9223372036854775807",
+          "x-ratelimit-limit-tokens-minute": "9223372036854775807",
+          "x-ratelimit-remaining-requests-day": "2879998",
+          "x-ratelimit-remaining-requests-hour": "119998",
+          "x-ratelimit-remaining-requests-minute": "1998",
+          "x-ratelimit-remaining-tokens-day": "9223372036854767616",
+          "x-ratelimit-remaining-tokens-hour": "9223372036854767616",
+          "x-ratelimit-remaining-tokens-minute": "9223372036854767616",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "fc34799b16885e8f",
       "matchKey": "POST router.huggingface.co/v1/chat/completions",
-      "callIndex": 1,
       "recordedAt": "2026-04-28T23:26:31.789Z",
       "request": {
-        "method": "POST",
-        "url": "https://router.huggingface.co/v1/chat/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -130,11 +118,22 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://router.huggingface.co/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{\"role\":\"assistant\"},\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
+            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{\"content\":\"OK\"},\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
+            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{\"content\":\".\"},\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
+            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{},\"finish_reason\":\"stop\",\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\",\"usage\":{\"total_tokens\":43,\"completion_tokens\":3,\"completion_tokens_details\":{\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0,\"reasoning_tokens\":0},\"prompt_tokens\":40,\"prompt_tokens_details\":{\"cached_tokens\":0}},\"time_info\":{\"queue_time\":0.00007562,\"prompt_time\":0.001808968,\"completion_time\":0.001196566,\"total_time\":0.0053615570068359375,\"created\":1777418782.8657675}}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "access-control-allow-origin": "*",
           "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
@@ -164,29 +163,16 @@
           "x-ratelimit-remaining-tokens-minute": "9223372036854767616",
           "x-robots-tag": "none"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
-            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{\"role\":\"assistant\"},\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
-            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{\"content\":\"OK\"},\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
-            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{\"content\":\".\"},\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
-            "data: {\"id\":\"chatcmpl-1d5e227c-0969-44ce-b4ee-eec47ad65366\",\"choices\":[{\"delta\":{},\"finish_reason\":\"stop\",\"index\":0}],\"created\":1777418782,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\",\"usage\":{\"total_tokens\":43,\"completion_tokens\":3,\"completion_tokens_details\":{\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0,\"reasoning_tokens\":0},\"prompt_tokens\":40,\"prompt_tokens_details\":{\"cached_tokens\":0}},\"time_info\":{\"queue_time\":0.00007562,\"prompt_time\":0.001808968,\"completion_time\":0.001196566,\"total_time\":0.0053615570068359375,\"created\":1777418782.8657675}}",
-            "data: [DONE]"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 2,
       "id": "3b65b128c60765b5",
       "matchKey": "POST router.huggingface.co/v1/chat/completions",
-      "callIndex": 2,
       "recordedAt": "2026-04-28T23:26:31.789Z",
       "request": {
-        "method": "POST",
-        "url": "https://router.huggingface.co/v1/chat/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -222,11 +208,21 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://router.huggingface.co/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"chatcmpl-da090f57-c015-46b0-a383-2816eab29130\",\"choices\":[{\"delta\":{\"role\":\"assistant\"},\"index\":0}],\"created\":1777418783,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
+            "data: {\"id\":\"chatcmpl-da090f57-c015-46b0-a383-2816eab29130\",\"choices\":[{\"delta\":{\"tool_calls\":[{\"function\":{\"name\":\"get_current_weather\",\"arguments\":\"{\\\"location\\\": \\\"San Francisco\\\"}\"},\"type\":\"function\",\"id\":\"a377190e9\",\"index\":0}]},\"index\":0}],\"created\":1777418783,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
+            "data: {\"id\":\"chatcmpl-da090f57-c015-46b0-a383-2816eab29130\",\"choices\":[{\"delta\":{},\"finish_reason\":\"tool_calls\",\"index\":0}],\"created\":1777418783,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\",\"usage\":{\"total_tokens\":414,\"completion_tokens\":20,\"completion_tokens_details\":{\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0,\"reasoning_tokens\":0},\"prompt_tokens\":394,\"prompt_tokens_details\":{\"cached_tokens\":0}},\"time_info\":{\"queue_time\":0.003320794,\"prompt_time\":0.018529026,\"completion_time\":0.008036854,\"total_time\":0.0320587158203125,\"created\":1777418783.1274838}}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "access-control-allow-origin": "*",
           "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
@@ -256,28 +252,16 @@
           "x-ratelimit-remaining-tokens-minute": "9223372036854769664",
           "x-robots-tag": "none"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
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-            "data: {\"id\":\"chatcmpl-da090f57-c015-46b0-a383-2816eab29130\",\"choices\":[{\"delta\":{\"tool_calls\":[{\"function\":{\"name\":\"get_current_weather\",\"arguments\":\"{\\\"location\\\": \\\"San Francisco\\\"}\"},\"type\":\"function\",\"id\":\"a377190e9\",\"index\":0}]},\"index\":0}],\"created\":1777418783,\"model\":\"llama3.1-8b\",\"system_fingerprint\":\"fp_96e7e4453bc38316a23a\",\"object\":\"chat.completion.chunk\"}",
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-            "data: [DONE]"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "ddb680b3e06dedc6",
       "matchKey": "POST router.huggingface.co/featherless-ai/v1/completions",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:26:31.789Z",
       "request": {
-        "method": "POST",
-        "url": "https://router.huggingface.co/featherless-ai/v1/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -287,11 +271,24 @@
             "prompt": "The capital of France is",
             "stream": true
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://router.huggingface.co/featherless-ai/v1/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[{\"index\":0,\"text\":\" Paris\",\"finish_reason\":null}]}",
+            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[{\"index\":0,\"text\":\".\\n\",\"finish_reason\":null}]}",
+            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[{\"index\":0,\"text\":\"The\",\"finish_reason\":null}]}",
+            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[{\"index\":0,\"text\":\" capital\",\"finish_reason\":null}]}",
+            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[{\"index\":0,\"text\":\"\",\"finish_reason\":\"length\"}],\"system_fingerprint\":\"fp1-nst-nes\"}",
+            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[],\"usage\":{\"prompt_tokens\":6,\"total_tokens\":10,\"completion_tokens\":4}}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "access-control-allow-credentials": "true",
           "access-control-allow-origin": "*",
@@ -312,36 +309,32 @@
           "x-powered-by": "huggingface-moon",
           "x-robots-tag": "none"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
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-            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[{\"index\":0,\"text\":\".\\n\",\"finish_reason\":null}]}",
-            "data: {\"id\":\"b77280bd-35f3-4914-becc-5aa70de3e63e\",\"object\":\"text_completion\",\"created\":1777418783,\"model\":\"arcee-ai/Trinity-Large-Thinking\",\"choices\":[{\"index\":0,\"text\":\"The\",\"finish_reason\":null}]}",
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-            "data: [DONE]"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "daf98736c72b7239",
       "matchKey": "GET huggingface.co/api/models/thenlper/gte-large",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:26:31.789Z",
       "request": {
-        "method": "GET",
-        "url": "https://huggingface.co/api/models/thenlper/gte-large?expand%5B%5D=pipeline_tag",
-        "headers": {},
         "body": {
           "kind": "empty"
-        }
+        },
+        "headers": {},
+        "method": "GET",
+        "url": "https://huggingface.co/api/models/thenlper/gte-large?expand%5B%5D=pipeline_tag"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "kind": "json",
+          "value": {
+            "_id": "64c23f1bd872858a39ed8154",
+            "id": "thenlper/gte-large",
+            "pipeline_tag": "sentence-similarity"
+          }
+        },
         "headers": {
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         "body": {
           "kind": "empty"
-        }
+        },
+        "headers": {},
+        "method": "GET",
+        "url": "https://huggingface.co/api/models/meta-llama/Llama-3.1-8B?expand%5B%5D=inferenceProviderMapping"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "kind": "json",
+          "value": {
+            "_id": "66944f1fe0c5c2e493a804f5",
+            "id": "meta-llama/Llama-3.1-8B",
+            "inferenceProviderMapping": {
+              "featherless-ai": {
+                "isModelAuthor": false,
+                "providerId": "meta-llama/Meta-Llama-3.1-8B",
+                "status": "live",
+                "task": "text-generation"
+              }
+            }
+          }
+        },
         "headers": {
           "access-control-allow-origin": "https://huggingface.co",
           "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
@@ -343,34 +345,16 @@
           "x-cache": "Miss from cloudfront",
           "x-powered-by": "huggingface-moon"
         },
-        "body": {
-          "kind": "json",
-          "value": {
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-            "id": "meta-llama/Llama-3.1-8B",
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-                "providerId": "meta-llama/Meta-Llama-3.1-8B",
-                "status": "live",
-                "task": "text-generation"
-              }
-            }
-          }
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "c67c1732b0eb4954",
       "matchKey": "POST router.huggingface.co/featherless-ai/v1/completions",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:27:00.376Z",
       "request": {
-        "method": "POST",
-        "url": "https://router.huggingface.co/featherless-ai/v1/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -380,32 +364,12 @@
             "prompt": "The capital of France is",
             "return_full_text": false
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://router.huggingface.co/featherless-ai/v1/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-allow-credentials": "true",
-          "access-control-allow-methods": "authorization,content-type",
-          "access-control-allow-origin": "*",
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-          "content-type": "application/json",
-          "cross-origin-opener-policy": "same-origin",
-          "nel": "{\"report_to\":\"cf-nel\",\"success_fraction\":0.0,\"max_age\":604800}",
-          "referrer-policy": "strict-origin-when-cross-origin",
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-          "request-id": "77a83fb1-28d4-4149-91dc-1095761ff8bb",
-          "vary": "Origin",
-          "via": "1.1 0c5ff101632b59c47cd99b22ac6119c0.cloudfront.net (CloudFront)",
-          "x-amz-cf-id": "6oDHlh9NODviiBKZNQBskUGa-Jc1G1hilHHWON71MZseefjgqGjuJA==",
-          "x-amz-cf-pop": "YVR52-P2",
-          "x-cache": "Miss from cloudfront",
-          "x-inference-provider": "featherless-ai",
-          "x-powered-by": "huggingface-moon",
-          "x-robots-tag": "none"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -428,20 +392,38 @@
               "total_tokens": 9
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-allow-credentials": "true",
+          "access-control-allow-methods": "authorization,content-type",
+          "access-control-allow-origin": "*",
+          "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
+          "cache-control": "no-cache",
+          "content-type": "application/json",
+          "cross-origin-opener-policy": "same-origin",
+          "nel": "{\"report_to\":\"cf-nel\",\"success_fraction\":0.0,\"max_age\":604800}",
+          "referrer-policy": "strict-origin-when-cross-origin",
+          "report-to": "{\"group\":\"cf-nel\",\"max_age\":604800,\"endpoints\":[{\"url\":\"https://a.nel.cloudflare.com/report/v4?s=mY34x%2BlzkHQrNLKzegMC%2FXGXl2HoG5BSXeTItnSdVkCSmrB1mkKIItZfxIU35DlGMLmFPqxlHzT6rg8fEKE%2Fcp81x2PF1a%2BytIDYQEeBWRMTo53fw91K%2FkhEl27osKm%2FFO07dw%3D%3D\"}]}",
+          "request-id": "77a83fb1-28d4-4149-91dc-1095761ff8bb",
+          "vary": "Origin",
+          "via": "1.1 0c5ff101632b59c47cd99b22ac6119c0.cloudfront.net (CloudFront)",
+          "x-amz-cf-id": "6oDHlh9NODviiBKZNQBskUGa-Jc1G1hilHHWON71MZseefjgqGjuJA==",
+          "x-amz-cf-pop": "YVR52-P2",
+          "x-cache": "Miss from cloudfront",
+          "x-inference-provider": "featherless-ai",
+          "x-powered-by": "huggingface-moon",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "aa2159c29ed1e98c",
       "matchKey": "POST router.huggingface.co/featherless-ai/v1/completions",
-      "callIndex": 1,
       "recordedAt": "2026-04-28T23:27:00.376Z",
       "request": {
-        "method": "POST",
-        "url": "https://router.huggingface.co/featherless-ai/v1/completions",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -452,11 +434,24 @@
             "return_full_text": false,
             "stream": true
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://router.huggingface.co/featherless-ai/v1/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\" Paris\",\"index\":0,\"finish_reason\":null}]}",
+            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\".\",\"index\":0,\"finish_reason\":null}]}",
+            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\" It\",\"index\":0,\"finish_reason\":null}]}",
+            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\" is\",\"index\":0,\"finish_reason\":null}]}",
+            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\"\",\"index\":0,\"finish_reason\":\"length\"}],\"system_fingerprint\":\"fp1-rss-paw\"}",
+            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"created\":1777418818,\"choices\":[],\"usage\":{\"prompt_tokens\":5,\"completion_tokens\":4,\"total_tokens\":9}}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "access-control-allow-credentials": "true",
           "access-control-allow-origin": "*",
@@ -477,36 +472,39 @@
           "x-powered-by": "huggingface-moon",
           "x-robots-tag": "none"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
-            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\" Paris\",\"index\":0,\"finish_reason\":null}]}",
-            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\".\",\"index\":0,\"finish_reason\":null}]}",
-            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\" It\",\"index\":0,\"finish_reason\":null}]}",
-            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\" is\",\"index\":0,\"finish_reason\":null}]}",
-            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"created\":1777418818,\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"choices\":[{\"text\":\"\",\"index\":0,\"finish_reason\":\"length\"}],\"system_fingerprint\":\"fp1-rss-paw\"}",
-            "data: {\"id\":\"e0b96a4b-9a97-4b29-a3ad-e7b39ce3a19a\",\"object\":\"text_completion\",\"model\":\"meta-llama/Meta-Llama-3.1-8B\",\"created\":1777418818,\"choices\":[],\"usage\":{\"prompt_tokens\":5,\"completion_tokens\":4,\"total_tokens\":9}}",
-            "data: [DONE]"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "daf98736c72b7239",
       "matchKey": "GET huggingface.co/api/models/thenlper/gte-large",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:27:00.376Z",
       "request": {
-        "method": "GET",
-        "url": "https://huggingface.co/api/models/thenlper/gte-large?expand%5B%5D=inferenceProviderMapping",
-        "headers": {},
         "body": {
           "kind": "empty"
-        }
+        },
+        "headers": {},
+        "method": "GET",
+        "url": "https://huggingface.co/api/models/thenlper/gte-large?expand%5B%5D=inferenceProviderMapping"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "kind": "json",
+          "value": {
+            "_id": "64c23f1bd872858a39ed8154",
+            "id": "thenlper/gte-large",
+            "inferenceProviderMapping": {
+              "hf-inference": {
+                "isModelAuthor": false,
+                "providerId": "thenlper/gte-large",
+                "status": "live",
+                "task": "sentence-similarity"
+              }
+            }
+          }
+        },
         "headers": {
           "access-control-allow-origin": "https://huggingface.co",
           "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
@@ -524,64 +522,27 @@
           "x-cache": "Miss from cloudfront",
           "x-powered-by": "huggingface-moon"
         },
-        "body": {
-          "kind": "json",
-          "value": {
-            "_id": "64c23f1bd872858a39ed8154",
-            "id": "thenlper/gte-large",
-            "inferenceProviderMapping": {
-              "hf-inference": {
-                "isModelAuthor": false,
-                "providerId": "thenlper/gte-large",
-                "status": "live",
-                "task": "sentence-similarity"
-              }
-            }
-          }
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "f527cd5a0dc5d7f9",
       "matchKey": "POST router.huggingface.co/hf-inference/models/thenlper/gte-large/pipeline/feature-extraction",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:27:00.376Z",
       "request": {
-        "method": "POST",
-        "url": "https://router.huggingface.co/hf-inference/models/thenlper/gte-large/pipeline/feature-extraction",
-        "headers": {
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
             "inputs": "Paris France"
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://router.huggingface.co/hf-inference/models/thenlper/gte-large/pipeline/feature-extraction"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-allow-credentials": "true",
-          "access-control-allow-origin": "*",
-          "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
-          "content-type": "application/json",
-          "cross-origin-opener-policy": "same-origin",
-          "referrer-policy": "strict-origin-when-cross-origin",
-          "vary": "origin, access-control-request-method, access-control-request-headers, origin, access-control-request-method, access-control-request-headers",
-          "via": "1.1 0c5ff101632b59c47cd99b22ac6119c0.cloudfront.net (CloudFront)",
-          "x-amz-cf-id": "wrthu7xtjuoon6bQ2rEhMno58eKaz3caVhlKe8A5VFvVhz1K18bUlQ==",
-          "x-amz-cf-pop": "YVR52-P2",
-          "x-cache": "Miss from cloudfront",
-          "x-inference-id": "32746f6d-bb10-4eb5-a156-8b98e6b88e8a",
-          "x-inference-provider": "hf-inference",
-          "x-powered-by": "huggingface-moon",
-          "x-proxied-host": "http://10.109.142.216",
-          "x-proxied-path": "/pipeline/feature-extraction",
-          "x-proxied-replica": "44vf5qav-2f4nm",
-          "x-robots-tag": "none"
-        },
         "body": {
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           "value": [
@@ -756,7 +717,7 @@
             0.022626269608736038, -0.016688846051692963, 0.005771295633167028,
             -0.009044435806572437, -0.05040424317121506, 0.001176387770101428,
             -0.00016678613610565662, -0.03416217118501663, -0.05471804365515709,
-            0.000009947750186256599, -0.0496915839612484, 0.021129319444298744,
+            9.947750186256599e-6, -0.0496915839612484, 0.021129319444298744,
             -0.01737176440656185, 0.0017752795247361064, -0.011021317914128304,
             -0.009284257888793945, 0.02842290885746479, 0.007452960591763258,
             0.005624083802103996, 0.0070625245571136475, -0.009976426139473915,
@@ -925,14 +886,41 @@
             -0.03245778754353523, 0.011912294663488865, 0.014013410545885563,
             -0.014327369630336761, 0.03169045224785805, -0.025917669758200645,
             -0.02307189628481865, -0.0029002863448113203, -0.021191135048866272,
-            -0.00008240768511313945, -0.035654909908771515, 0.01273074746131897,
+            -8.240768511313945e-5, -0.035654909908771515, 0.01273074746131897,
             0.04374304041266441, -0.039644595235586166, -0.05033861845731735,
             -0.01814350299537182, 0.04090336337685585, 0.0329778827726841,
             0.02721802331507206, -0.03109864704310894, 0.006142554339021444,
             0.01078912615776062
           ]
-        }
+        },
+        "headers": {
+          "access-control-allow-credentials": "true",
+          "access-control-allow-origin": "*",
+          "access-control-expose-headers": "X-Repo-Commit,X-Request-Id,X-Error-Code,X-Error-Message,X-Total-Count,ETag,Link,Accept-Ranges,Content-Range,X-Linked-Size,X-Linked-ETag,X-Xet-Hash",
+          "content-type": "application/json",
+          "cross-origin-opener-policy": "same-origin",
+          "referrer-policy": "strict-origin-when-cross-origin",
+          "vary": "origin, access-control-request-method, access-control-request-headers, origin, access-control-request-method, access-control-request-headers",
+          "via": "1.1 0c5ff101632b59c47cd99b22ac6119c0.cloudfront.net (CloudFront)",
+          "x-amz-cf-id": "wrthu7xtjuoon6bQ2rEhMno58eKaz3caVhlKe8A5VFvVhz1K18bUlQ==",
+          "x-amz-cf-pop": "YVR52-P2",
+          "x-cache": "Miss from cloudfront",
+          "x-inference-id": "32746f6d-bb10-4eb5-a156-8b98e6b88e8a",
+          "x-inference-provider": "hf-inference",
+          "x-powered-by": "huggingface-moon",
+          "x-proxied-host": "http://10.109.142.216",
+          "x-proxied-path": "/pipeline/feature-extraction",
+          "x-proxied-replica": "44vf5qav-2f4nm",
+          "x-robots-tag": "none"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-28T23:27:00.376Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/huggingface-instrumentation/assertions.ts b/e2e/scenarios/huggingface-instrumentation/assertions.ts
index 991ba108a..9b2e50eff 100644
--- a/e2e/scenarios/huggingface-instrumentation/assertions.ts
+++ b/e2e/scenarios/huggingface-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import { type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -395,9 +396,10 @@ export function defineHuggingFaceInstrumentationAssertions(options: {
       "matches the span contract snapshot",
       { timeout: options.timeoutMs },
       async ({ expect }) => {
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(buildSpanSummary(events)),
-        ).toMatchFileSnapshot(spanSnapshotPath);
+          spanSnapshotPath,
+        );
       },
     );
 
@@ -405,7 +407,8 @@ export function defineHuggingFaceInstrumentationAssertions(options: {
       "matches the log payload snapshot",
       { timeout: options.timeoutMs },
       async ({ expect }) => {
-        await expect(formatJsonFileSnapshot(payloadRows)).toMatchFileSnapshot(
+        await matchFileSnapshot(
+          formatJsonFileSnapshot(payloadRows),
           payloadSnapshotPath,
         );
       },
diff --git a/e2e/scenarios/mistral-instrumentation/assertions.ts b/e2e/scenarios/mistral-instrumentation/assertions.ts
index ea50d39c0..726832272 100644
--- a/e2e/scenarios/mistral-instrumentation/assertions.ts
+++ b/e2e/scenarios/mistral-instrumentation/assertions.ts
@@ -8,6 +8,7 @@ import type { Json } from "../../helpers/normalize";
 import { normalizeForSnapshot } from "../../helpers/normalize";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -1191,17 +1192,19 @@ export function defineMistralInstrumentationAssertions(options: {
     }
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildSpanSummary(events, options.snapshotName)),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
 
     test("matches the shared payload snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(
           buildPayloadSummary(events, payloads, options.snapshotName),
         ),
-      ).toMatchFileSnapshot(payloadSnapshotPath);
+        payloadSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/nextjs-instrumentation/scenario.test.ts b/e2e/scenarios/nextjs-instrumentation/scenario.test.ts
index 145b64aeb..edc17ba3a 100644
--- a/e2e/scenarios/nextjs-instrumentation/scenario.test.ts
+++ b/e2e/scenarios/nextjs-instrumentation/scenario.test.ts
@@ -1,6 +1,7 @@
 import { expect, test } from "vitest";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import type { Json } from "../../helpers/normalize";
@@ -192,7 +193,7 @@ test(
           );
         }
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             responses.map((response) => ({
               body: response.body,
@@ -200,19 +201,17 @@ test(
               status: response.status,
             })) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "route-responses.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             [edgeSpan, nodeSpan].map((event) => summarizeEvent(event!)) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "span-events.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             otelSpans
               .filter(
@@ -230,11 +229,10 @@ test(
                 name: span.name,
               })) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "otel-spans.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             dedupeProjectRegisterRequestSummaries(
               requests.map((request) => {
@@ -262,7 +260,6 @@ test(
               }),
             ) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "request-flow.json"),
         );
       },
diff --git a/e2e/scenarios/openai-instrumentation/__cassettes__/openai-v4.cassette.json b/e2e/scenarios/openai-instrumentation/__cassettes__/openai-v4.cassette.json
index d8b302432..698a491a7 100644
--- a/e2e/scenarios/openai-instrumentation/__cassettes__/openai-v4.cassette.json
+++ b/e2e/scenarios/openai-instrumentation/__cassettes__/openai-v4.cassette.json
@@ -1,23 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-27T22:29:40.882Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "46b2c268acedfb12",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 0,
       "recordedAt": "2026-04-27T22:29:40.882Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -31,20 +19,12 @@
             "model": "gpt-4o-mini-2024-07-18",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -83,22 +63,26 @@
               "total_tokens": 14
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "ffc24f779b8a11e0",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 1,
       "recordedAt": "2026-04-27T22:29:40.882Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -112,20 +96,12 @@
             "model": "gpt-4o-mini-2024-07-18",
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -164,22 +140,26 @@
               "total_tokens": 14
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 2,
       "id": "e6f3179b1cdbd9fa",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 2,
       "recordedAt": "2026-04-27T22:29:40.882Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -197,11 +177,22 @@
             },
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"refusal\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"b8XJWjWKe\"}",
+            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"STREAM\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"BKjZW\"}",
+            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"usage\":null,\"obfuscation\":\"ZW8BD\"}",
+            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[],\"usage\":{\"prompt_tokens\":12,\"completion_tokens\":1,\"total_tokens\":13,\"prompt_tokens_details\":{\"cached_tokens\":0,\"audio_tokens\":0},\"completion_tokens_details\":{\"reasoning_tokens\":0,\"audio_tokens\":0,\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0}},\"obfuscation\":\"5sIrxeh1HGd\"}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "access-control-expose-headers": "X-Request-ID",
           "alt-svc": "h3=\":443\"; ma=86400",
@@ -211,31 +202,16 @@
           "x-content-type-options": "nosniff",
           "x-openai-proxy-wasm": "v0.1"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
-            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"refusal\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"b8XJWjWKe\"}",
-            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"STREAM\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"BKjZW\"}",
-            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"usage\":null,\"obfuscation\":\"ZW8BD\"}",
-            "data: {\"id\":\"chatcmpl-DZOkD2fcVCC0BkRPDzUlLZD0rqrVj\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[],\"usage\":{\"prompt_tokens\":12,\"completion_tokens\":1,\"total_tokens\":13,\"prompt_tokens_details\":{\"cached_tokens\":0,\"audio_tokens\":0},\"completion_tokens_details\":{\"reasoning_tokens\":0,\"audio_tokens\":0,\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0}},\"obfuscation\":\"5sIrxeh1HGd\"}",
-            "data: [DONE]"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 3,
       "id": "14b2b5dd8ab752df",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 3,
       "recordedAt": "2026-04-27T22:29:40.882Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -253,22 +229,13 @@
             },
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "text/event-stream; charset=utf-8",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
-          "kind": "sse",
           "chunks": [
             "data: {\"id\":\"chatcmpl-DZOkDVKb9R6CkykG5fkCkMYkcZEqw\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_4181e24c46\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"refusal\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"RLtunz5r5\"}",
             "data: {\"id\":\"chatcmpl-DZOkDVKb9R6CkykG5fkCkMYkcZEqw\",\"object\":\"chat.completion.chunk\",\"created\":1777328969,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_4181e24c46\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"STREAM\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"AUsz7\"}",
@@ -280,24 +247,28 @@
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             "data: [DONE]"
-          ]
-        }
+          ],
+          "kind": "sse"
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "text/event-stream; charset=utf-8",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 4,
       "id": "acf5ed00b0bfb7f2",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 4,
       "recordedAt": "2026-04-27T22:29:40.882Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "content-type": "application/json",
-          "x-stainless-helper-method": "beta.chat.completions.parse"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -324,20 +295,12 @@
               "type": "json_schema"
             }
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
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-        },
         "body": {
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           "value": {
@@ -376,23 +339,26 @@
               "total_tokens": 50
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 5,
       "id": "7b964923f5fd30df",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 5,
       "recordedAt": "2026-04-27T22:29:40.882Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "accept-encoding": "gzip,deflate",
-          "content-type": "application/json",
-          "x-stainless-helper-method": "stream"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -407,11 +373,22 @@
             "stream": true,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"chatcmpl-DZOkF3CZGw7zwMKaxsfzS5QxlTFKg\",\"object\":\"chat.completion.chunk\",\"created\":1777328971,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"refusal\":null},\"logprobs\":null,\"finish_reason\":null}],\"obfuscation\":\"V8MbVz\"}",
+            "data: {\"id\":\"chatcmpl-DZOkF3CZGw7zwMKaxsfzS5QxlTFKg\",\"object\":\"chat.completion.chunk\",\"created\":1777328971,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"SYNC\"},\"logprobs\":null,\"finish_reason\":null}],\"obfuscation\":\"tTWL\"}",
+            "data: {\"id\":\"chatcmpl-DZOkF3CZGw7zwMKaxsfzS5QxlTFKg\",\"object\":\"chat.completion.chunk\",\"created\":1777328971,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\" STREAM\"},\"logprobs\":null,\"finish_reason\":null}],\"obfuscation\":\"U\"}",
+            "data: {\"id\":\"chatcmpl-DZOkF3CZGw7zwMKaxsfzS5QxlTFKg\",\"object\":\"chat.completion.chunk\",\"created\":1777328971,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"obfuscation\":\"0K\"}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
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@@ -421,31 +398,16 @@
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             "model": "gpt-4o-mini-2024-07-18",
             "stream": true
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "text/event-stream; charset=utf-8",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff"
-        },
         "body": {
-          "kind": "sse",
           "chunks": [
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@@ -931,22 +873,26 @@
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             "event: response.completed\ndata: {\"type\":\"response.completed\",\"response\":{\"id\":\"resp_0dffb6b853a702220069efe36be71c81938030ea4579b4bc3b\",\"object\":\"response\",\"created_at\":1777329003,\"status\":\"completed\",\"background\":false,\"completed_at\":1777329004,\"error\":null,\"frequency_penalty\":0.0,\"incomplete_details\":null,\"instructions\":null,\"max_output_tokens\":24,\"max_tool_calls\":null,\"model\":\"gpt-4o-mini-2024-07-18\",\"moderation\":null,\"output\":[{\"id\":\"msg_0dffb6b853a702220069efe36cd2d48193ace5fc51a06dde10\",\"type\":\"message\",\"status\":\"completed\",\"content\":[{\"type\":\"output_text\",\"annotations\":[],\"logprobs\":[],\"text\":\"PARTIAL\"}],\"role\":\"assistant\"}],\"parallel_tool_calls\":true,\"presence_penalty\":0.0,\"previous_response_id\":null,\"prompt_cache_key\":null,\"prompt_cache_retention\":\"in_memory\",\"reasoning\":{\"effort\":null,\"summary\":null},\"safety_identifier\":null,\"service_tier\":\"default\",\"store\":true,\"temperature\":1.0,\"text\":{\"format\":{\"type\":\"text\"},\"verbosity\":\"medium\"},\"tool_choice\":\"auto\",\"tools\":[],\"top_logprobs\":0,\"top_p\":1.0,\"truncation\":\"disabled\",\"usage\":{\"input_tokens\":13,\"input_tokens_details\":{\"cached_tokens\":0},\"output_tokens\":3,\"output_tokens_details\":{\"reasoning_tokens\":0},\"total_tokens\":16},\"user\":null,\"metadata\":{}},\"sequence_number\":9}"
-          ]
-        }
+          ],
+          "kind": "sse"
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "text/event-stream; charset=utf-8",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 5,
       "id": "c684b0749c53da7e",
       "matchKey": "POST api.openai.com/v1/responses",
-      "callIndex": 5,
       "recordedAt": "2026-04-27T22:30:12.367Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/responses",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -972,18 +918,12 @@
               }
             }
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
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-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1074,21 +1014,24 @@
             },
             "user": null
           }
-        }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 0,
       "id": "ff7de06d052cb661",
       "matchKey": "POST api.openai.com/v1/responses/compact",
-      "callIndex": 0,
       "recordedAt": "2026-04-27T22:30:12.367Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/responses/compact",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1115,18 +1058,12 @@
             "instructions": "Preserve only durable user preferences.",
             "model": "gpt-4o-mini-2024-07-18"
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/responses/compact"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
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-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1164,21 +1101,24 @@
               "total_tokens": 350
             }
           }
-        }
+        },
+        "headers": {
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 6,
       "id": "c878e016ad8ae6a0",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 6,
       "recordedAt": "2026-04-27T22:30:12.367Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1196,11 +1136,23 @@
             },
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
+        "body": {
+          "chunks": [
+            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"refusal\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"N0i0GyRXM\"}",
+            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"SYNC\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"2UQdsnv\"}",
+            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\" STREAM\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"pHCF\"}",
+            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"usage\":null,\"obfuscation\":\"r5oAr\"}",
+            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[],\"usage\":{\"prompt_tokens\":14,\"completion_tokens\":2,\"total_tokens\":16,\"prompt_tokens_details\":{\"cached_tokens\":0,\"audio_tokens\":0},\"completion_tokens_details\":{\"reasoning_tokens\":0,\"audio_tokens\":0,\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0}},\"obfuscation\":\"5IswCXspMft\"}",
+            "data: [DONE]"
+          ],
+          "kind": "sse"
+        },
         "headers": {
           "access-control-expose-headers": "X-Request-ID",
           "alt-svc": "h3=\":443\"; ma=86400",
@@ -1210,18 +1162,14 @@
           "x-content-type-options": "nosniff",
           "x-openai-proxy-wasm": "v0.1"
         },
-        "body": {
-          "kind": "sse",
-          "chunks": [
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-            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"SYNC\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"2UQdsnv\"}",
-            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\" STREAM\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"pHCF\"}",
-            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"usage\":null,\"obfuscation\":\"r5oAr\"}",
-            "data: {\"id\":\"chatcmpl-DZOkukXlBTtP7pNrsqhjSZMYDo9XH\",\"object\":\"chat.completion.chunk\",\"created\":1777329012,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_8626201b1a\",\"choices\":[],\"usage\":{\"prompt_tokens\":14,\"completion_tokens\":2,\"total_tokens\":16,\"prompt_tokens_details\":{\"cached_tokens\":0,\"audio_tokens\":0},\"completion_tokens_details\":{\"reasoning_tokens\":0,\"audio_tokens\":0,\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0}},\"obfuscation\":\"5IswCXspMft\"}",
-            "data: [DONE]"
-          ]
-        }
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-27T22:30:12.367Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/openai-instrumentation/assertions.ts b/e2e/scenarios/openai-instrumentation/assertions.ts
index 967d5e800..b3f6966f0 100644
--- a/e2e/scenarios/openai-instrumentation/assertions.ts
+++ b/e2e/scenarios/openai-instrumentation/assertions.ts
@@ -6,6 +6,7 @@ import { normalizeForSnapshot, type Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -666,15 +667,17 @@ export function defineOpenAIInstrumentationAssertions(options: {
     }
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildSpanSummary(events, operationSpecs)),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
 
     test("matches the shared payload snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(buildPayloadSummary(events, operationSpecs)),
-      ).toMatchFileSnapshot(payloadSnapshotPath);
+        payloadSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/openrouter-agent-instrumentation/__cassettes__/openrouter-agent-current.cassette.json b/e2e/scenarios/openrouter-agent-instrumentation/__cassettes__/openrouter-agent-current.cassette.json
index f8dec4b85..cda634cfb 100644
--- a/e2e/scenarios/openrouter-agent-instrumentation/__cassettes__/openrouter-agent-current.cassette.json
+++ b/e2e/scenarios/openrouter-agent-instrumentation/__cassettes__/openrouter-agent-current.cassette.json
@@ -1,23 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-28T23:46:28.223Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "4d858273541c82d7",
       "matchKey": "POST openrouter.ai/api/v1/responses",
-      "callIndex": 0,
       "recordedAt": "2026-04-28T23:46:28.223Z",
       "request": {
-        "method": "POST",
-        "url": "https://openrouter.ai/api/v1/responses",
-        "headers": {
-          "accept": "text/event-stream",
-          "content-type": "application/json",
-          "x-openrouter-callmodel": "true"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -50,23 +38,13 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://openrouter.ai/api/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-allow-origin": "*",
-          "access-control-expose-headers": "X-Generation-Id,cf-ray",
-          "cache-control": "no-cache",
-          "content-type": "text/event-stream",
-          "permissions-policy": "payment=(self \"https://checkout.stripe.com\" \"https://connect-js.stripe.com\" \"https://js.stripe.com\" \"https://*.js.stripe.com\" \"https://hooks.stripe.com\")",
-          "referrer-policy": "no-referrer, strict-origin-when-cross-origin",
-          "x-content-type-options": "nosniff",
-          "x-generation-id": "gen-1777419983-k0DPZdZ2ELPMFCWOGO1N"
-        },
         "body": {
-          "kind": "sse",
           "chunks": [
             ": OPENROUTER PROCESSING",
             "data: {\"type\":\"response.created\",\"response\":{\"id\":\"gen-1777419983-k0DPZdZ2ELPMFCWOGO1N\",\"object\":\"response\",\"created_at\":1777419983,\"model\":\"google/gemini-2.5-flash-lite\",\"status\":\"in_progress\",\"completed_at\":null,\"output\":[],\"error\":null,\"incomplete_details\":null,\"tools\":[{\"type\":\"function\",\"name\":\"lookup_weather\",\"description\":\"Look up the weather forecast for a city.\",\"strict\":null,\"parameters\":{\"$schema\":\"http://json-schema.org/draft-07/schema#\",\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"tool_choice\":\"required\",\"parallel_tool_calls\":true,\"max_output_tokens\":16,\"temperature\":0,\"top_p\":1,\"presence_penalty\":0,\"frequency_penalty\":0,\"top_logprobs\":0,\"max_tool_calls\":1,\"metadata\":{},\"background\":false,\"previous_response_id\":null,\"service_tier\":\"auto\",\"truncation\":\"disabled\",\"store\":false,\"instructions\":null,\"text\":{\"format\":{\"type\":\"text\"}},\"reasoning\":null,\"safety_identifier\":null,\"prompt_cache_key\":null,\"usage\":null},\"sequence_number\":0}",
@@ -82,23 +60,29 @@
             "data: {\"type\":\"response.output_item.done\",\"output_index\":0,\"item\":{\"id\":\"fc_tmp_h3sowa79kli\",\"type\":\"function_call\",\"status\":\"completed\",\"call_id\":\"call_Df2h7Lz4rcoXlRHQcr3ixIMD\",\"name\":\"lookup_weather\",\"arguments\":\"{\\\"city\\\":\\\"Vienna\\\"}\"},\"sequence_number\":10}",
             "data: {\"type\":\"response.completed\",\"response\":{\"id\":\"gen-1777419983-k0DPZdZ2ELPMFCWOGO1N\",\"object\":\"response\",\"created_at\":1777419983,\"model\":\"google/gemini-2.5-flash-lite\",\"status\":\"completed\",\"completed_at\":1777419984,\"output\":[{\"id\":\"fc_tmp_h3sowa79kli\",\"type\":\"function_call\",\"status\":\"completed\",\"call_id\":\"call_Df2h7Lz4rcoXlRHQcr3ixIMD\",\"name\":\"lookup_weather\",\"arguments\":\"{\\\"city\\\":\\\"Vienna\\\"}\"}],\"error\":null,\"incomplete_details\":null,\"tools\":[{\"type\":\"function\",\"name\":\"lookup_weather\",\"description\":\"Look up the weather forecast for a city.\",\"strict\":null,\"parameters\":{\"$schema\":\"http://json-schema.org/draft-07/schema#\",\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"tool_choice\":\"required\",\"parallel_tool_calls\":true,\"max_output_tokens\":16,\"temperature\":0,\"top_p\":1,\"presence_penalty\":0,\"frequency_penalty\":0,\"top_logprobs\":0,\"max_tool_calls\":1,\"metadata\":{},\"background\":false,\"previous_response_id\":null,\"service_tier\":\"auto\",\"truncation\":\"disabled\",\"store\":false,\"instructions\":null,\"text\":{\"format\":{\"type\":\"text\"}},\"reasoning\":null,\"safety_identifier\":null,\"prompt_cache_key\":null,\"usage\":{\"input_tokens\":63,\"input_tokens_details\":{\"cached_tokens\":0},\"output_tokens\":15,\"output_tokens_details\":{\"reasoning_tokens\":0},\"total_tokens\":78,\"cost\":0.00001845,\"is_byok\":false,\"cost_details\":{\"upstream_inference_cost\":0.00001845,\"upstream_inference_input_cost\":0.00000945,\"upstream_inference_output_cost\":0.000009}}},\"sequence_number\":11}",
             "data: [DONE]"
-          ]
-        }
+          ],
+          "kind": "sse"
+        },
+        "headers": {
+          "access-control-allow-origin": "*",
+          "access-control-expose-headers": "X-Generation-Id,cf-ray",
+          "cache-control": "no-cache",
+          "content-type": "text/event-stream",
+          "permissions-policy": "payment=(self \"https://checkout.stripe.com\" \"https://connect-js.stripe.com\" \"https://js.stripe.com\" \"https://*.js.stripe.com\" \"https://hooks.stripe.com\")",
+          "referrer-policy": "no-referrer, strict-origin-when-cross-origin",
+          "x-content-type-options": "nosniff",
+          "x-generation-id": "gen-1777419983-k0DPZdZ2ELPMFCWOGO1N"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
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@@ -1652,21 +1614,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://openrouter.ai/api/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-allow-origin": "*",
-          "access-control-expose-headers": "X-Generation-Id,cf-ray",
-          "content-type": "application/json",
-          "permissions-policy": "payment=(self \"https://checkout.stripe.com\" \"https://connect-js.stripe.com\" \"https://js.stripe.com\" \"https://*.js.stripe.com\" \"https://hooks.stripe.com\")",
-          "referrer-policy": "no-referrer, strict-origin-when-cross-origin",
-          "vary": "Accept-Encoding",
-          "x-content-type-options": "nosniff",
-          "x-generation-id": "gen-1777419468-NWK4fNRdaigc5RUwnuKI"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1750,21 +1703,27 @@
               "total_tokens": 198
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-allow-origin": "*",
+          "access-control-expose-headers": "X-Generation-Id,cf-ray",
+          "content-type": "application/json",
+          "permissions-policy": "payment=(self \"https://checkout.stripe.com\" \"https://connect-js.stripe.com\" \"https://js.stripe.com\" \"https://*.js.stripe.com\" \"https://hooks.stripe.com\")",
+          "referrer-policy": "no-referrer, strict-origin-when-cross-origin",
+          "vary": "Accept-Encoding",
+          "x-content-type-options": "nosniff",
+          "x-generation-id": "gen-1777419468-NWK4fNRdaigc5RUwnuKI"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 7,
       "id": "8598fe445a5ecf9e",
       "matchKey": "POST openrouter.ai/api/v1/responses",
-      "callIndex": 7,
       "recordedAt": "2026-04-28T23:37:50.101Z",
       "request": {
-        "method": "POST",
-        "url": "https://openrouter.ai/api/v1/responses",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1872,20 +1831,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://openrouter.ai/api/v1/responses"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-allow-origin": "*",
-          "access-control-expose-headers": "X-Generation-Id,cf-ray",
-          "content-type": "application/json",
-          "permissions-policy": "payment=(self \"https://checkout.stripe.com\" \"https://connect-js.stripe.com\" \"https://js.stripe.com\" \"https://*.js.stripe.com\" \"https://hooks.stripe.com\")",
-          "referrer-policy": "no-referrer, strict-origin-when-cross-origin",
-          "x-content-type-options": "nosniff",
-          "x-generation-id": "gen-1777419469-qagrmFqKmZIhN0B8Kc2c"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -1969,8 +1920,24 @@
               "total_tokens": 228
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-allow-origin": "*",
+          "access-control-expose-headers": "X-Generation-Id,cf-ray",
+          "content-type": "application/json",
+          "permissions-policy": "payment=(self \"https://checkout.stripe.com\" \"https://connect-js.stripe.com\" \"https://js.stripe.com\" \"https://*.js.stripe.com\" \"https://hooks.stripe.com\")",
+          "referrer-policy": "no-referrer, strict-origin-when-cross-origin",
+          "x-content-type-options": "nosniff",
+          "x-generation-id": "gen-1777419469-qagrmFqKmZIhN0B8Kc2c"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-28T23:37:50.101Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/openrouter-instrumentation/assertions.ts b/e2e/scenarios/openrouter-instrumentation/assertions.ts
index 5cff8ef99..d2d912741 100644
--- a/e2e/scenarios/openrouter-instrumentation/assertions.ts
+++ b/e2e/scenarios/openrouter-instrumentation/assertions.ts
@@ -3,6 +3,7 @@ import type { Json } from "../../helpers/normalize";
 import type { CapturedLogEvent } from "../../helpers/mock-braintrust-server";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import { withScenarioHarness } from "../../helpers/scenario-harness";
@@ -405,13 +406,14 @@ export function defineOpenRouterTraceAssertions(options: {
     );
 
     test("matches the shared span snapshot", testConfig, async () => {
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(
           buildSpanSummary(events, {
             supportsRerank: options.supportsRerank,
           }),
         ),
-      ).toMatchFileSnapshot(spanSnapshotPath);
+        spanSnapshotPath,
+      );
     });
   });
 }
diff --git a/e2e/scenarios/test-framework-evals-jest/scenario.test.ts b/e2e/scenarios/test-framework-evals-jest/scenario.test.ts
index 2cb80f6dd..f6ab0abd0 100644
--- a/e2e/scenarios/test-framework-evals-jest/scenario.test.ts
+++ b/e2e/scenarios/test-framework-evals-jest/scenario.test.ts
@@ -1,6 +1,7 @@
 import { expect, test } from "vitest";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import type { Json } from "../../helpers/normalize";
@@ -147,7 +148,7 @@ test(
           ]),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             [
               basicSpan,
@@ -160,19 +161,17 @@ test(
               currentSpan,
             ].map((event) => summarizeEvent(event!)) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "span-events.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             payloadRowsForTestRunId(payloads(), testRunId) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "log-payloads.json"),
         );
 
-        await expect(
+        await matchFileSnapshot(
           formatJsonFileSnapshot(
             requests.map((request) =>
               summarizeRequest(request, {
@@ -180,7 +179,6 @@ test(
               }),
             ) as Json,
           ),
-        ).toMatchFileSnapshot(
           resolveFileSnapshotPath(import.meta.url, "request-flow.json"),
         );
       },
diff --git a/e2e/scenarios/test-framework-evals-vitest/scenario.test.ts b/e2e/scenarios/test-framework-evals-vitest/scenario.test.ts
index be4e7e7fa..b57d053ee 100644
--- a/e2e/scenarios/test-framework-evals-vitest/scenario.test.ts
+++ b/e2e/scenarios/test-framework-evals-vitest/scenario.test.ts
@@ -1,6 +1,7 @@
 import { expect, test } from "vitest";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import type { Json } from "../../helpers/normalize";
@@ -111,7 +112,7 @@ for (const scenario of scenarios) {
             pass: 0,
           });
 
-          await expect(
+          await matchFileSnapshot(
             formatJsonFileSnapshot(
               [
                 simplePass,
@@ -127,18 +128,16 @@ for (const scenario of scenarios) {
                 ]),
               ) as Json,
             ),
-          ).toMatchFileSnapshot(
             resolveFileSnapshotPath(
               import.meta.url,
               `${scenario.label}.span-events.json`,
             ),
           );
 
-          await expect(
+          await matchFileSnapshot(
             formatJsonFileSnapshot(
               payloadRowsForTestRunId(payloads(), testRunId) as Json,
             ),
-          ).toMatchFileSnapshot(
             resolveFileSnapshotPath(
               import.meta.url,
               `${scenario.label}.log-payloads.json`,
diff --git a/e2e/scenarios/wrap-langchain-js-traces/__cassettes__/wrap-langchain-js-traces.cassette.json b/e2e/scenarios/wrap-langchain-js-traces/__cassettes__/wrap-langchain-js-traces.cassette.json
index ad4c1f608..6028a1329 100644
--- a/e2e/scenarios/wrap-langchain-js-traces/__cassettes__/wrap-langchain-js-traces.cassette.json
+++ b/e2e/scenarios/wrap-langchain-js-traces/__cassettes__/wrap-langchain-js-traces.cassette.json
@@ -1,22 +1,11 @@
 {
-  "version": 1,
-  "meta": {
-    "createdAt": "2026-04-27T22:52:25.873Z",
-    "seinfeldVersion": "0.0.0"
-  },
   "entries": [
     {
+      "callIndex": 0,
       "id": "4ade6cf873e61609",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 0,
       "recordedAt": "2026-04-27T22:52:25.873Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -31,20 +20,12 @@
             "stream": false,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -83,21 +64,26 @@
               "total_tokens": 14
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 1,
       "id": "718701b4b8f854fd",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 1,
       "recordedAt": "2026-04-27T22:52:25.873Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -112,20 +98,12 @@
             "stream": false,
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -164,21 +142,26 @@
               "total_tokens": 20
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 2,
       "id": "5693602c184a903e",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 2,
       "recordedAt": "2026-04-27T22:52:25.873Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -196,22 +179,13 @@
             },
             "temperature": 0
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "text/event-stream; charset=utf-8",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
-          "kind": "sse",
           "chunks": [
             "data: {\"id\":\"chatcmpl-DZP6MJcDct7RPxXlAi8L8npr6FhTo\",\"object\":\"chat.completion.chunk\",\"created\":1777330342,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_b9ca58c2f4\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"refusal\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"GR2VjPdgd\"}",
             "data: {\"id\":\"chatcmpl-DZP6MJcDct7RPxXlAi8L8npr6FhTo\",\"object\":\"chat.completion.chunk\",\"created\":1777330342,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_b9ca58c2f4\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"One\"},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null,\"obfuscation\":\"uSGGFPhl\"}",
@@ -223,22 +197,28 @@
             "data: {\"id\":\"chatcmpl-DZP6MJcDct7RPxXlAi8L8npr6FhTo\",\"object\":\"chat.completion.chunk\",\"created\":1777330342,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_b9ca58c2f4\",\"choices\":[{\"index\":0,\"delta\":{},\"logprobs\":null,\"finish_reason\":\"stop\"}],\"usage\":null,\"obfuscation\":\"huibw\"}",
             "data: {\"id\":\"chatcmpl-DZP6MJcDct7RPxXlAi8L8npr6FhTo\",\"object\":\"chat.completion.chunk\",\"created\":1777330342,\"model\":\"gpt-4o-mini-2024-07-18\",\"service_tier\":\"default\",\"system_fingerprint\":\"fp_b9ca58c2f4\",\"choices\":[],\"usage\":{\"prompt_tokens\":22,\"completion_tokens\":6,\"total_tokens\":28,\"prompt_tokens_details\":{\"cached_tokens\":0,\"audio_tokens\":0},\"completion_tokens_details\":{\"reasoning_tokens\":0,\"audio_tokens\":0,\"accepted_prediction_tokens\":0,\"rejected_prediction_tokens\":0}},\"obfuscation\":\"RILxoam9hhB\"}",
             "data: [DONE]"
-          ]
-        }
+          ],
+          "kind": "sse"
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "text/event-stream; charset=utf-8",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 3,
       "id": "2aec1890b17d042a",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 3,
       "recordedAt": "2026-04-27T22:52:25.873Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -274,20 +254,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -336,21 +308,26 @@
               "total_tokens": 88
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 4,
       "id": "94f5195bfece0d17",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 4,
       "recordedAt": "2026-04-27T22:52:25.873Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -392,20 +369,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -454,21 +423,26 @@
               "total_tokens": 97
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     },
     {
+      "callIndex": 5,
       "id": "79b152b6ac091531",
       "matchKey": "POST api.openai.com/v1/chat/completions",
-      "callIndex": 5,
       "recordedAt": "2026-04-27T22:52:25.873Z",
       "request": {
-        "method": "POST",
-        "url": "https://api.openai.com/v1/chat/completions",
-        "headers": {
-          "accept": "application/json",
-          "content-type": "application/json"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -529,20 +503,12 @@
               }
             ]
           }
-        }
+        },
+        "headers": {},
+        "method": "POST",
+        "url": "https://api.openai.com/v1/chat/completions"
       },
       "response": {
-        "status": 200,
-        "statusText": "OK",
-        "headers": {
-          "access-control-expose-headers": "X-Request-ID",
-          "alt-svc": "h3=\":443\"; ma=86400",
-          "content-type": "application/json",
-          "openai-organization": "braintrust-data",
-          "openai-version": "2020-10-01",
-          "x-content-type-options": "nosniff",
-          "x-openai-proxy-wasm": "v0.1"
-        },
         "body": {
           "kind": "json",
           "value": {
@@ -581,8 +547,24 @@
               "total_tokens": 117
             }
           }
-        }
+        },
+        "headers": {
+          "access-control-expose-headers": "X-Request-ID",
+          "alt-svc": "h3=\":443\"; ma=86400",
+          "content-type": "application/json",
+          "openai-organization": "braintrust-data",
+          "openai-version": "2020-10-01",
+          "x-content-type-options": "nosniff",
+          "x-openai-proxy-wasm": "v0.1"
+        },
+        "status": 200,
+        "statusText": "OK"
       }
     }
-  ]
+  ],
+  "meta": {
+    "createdAt": "2026-04-27T22:52:25.873Z",
+    "seinfeldVersion": "0.0.0"
+  },
+  "version": 1
 }
diff --git a/e2e/scenarios/wrap-langchain-js-traces/scenario.test.ts b/e2e/scenarios/wrap-langchain-js-traces/scenario.test.ts
index 7725c479c..fd9fcd99f 100644
--- a/e2e/scenarios/wrap-langchain-js-traces/scenario.test.ts
+++ b/e2e/scenarios/wrap-langchain-js-traces/scenario.test.ts
@@ -1,6 +1,7 @@
 import { expect, test } from "vitest";
 import {
   formatJsonFileSnapshot,
+  matchFileSnapshot,
   resolveFileSnapshotPath,
 } from "../../helpers/file-snapshot";
 import {
@@ -43,14 +44,12 @@ test(
         scenarioName: "wrap-langchain-js-traces",
       });
 
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(summaries.spanSummary),
-      ).toMatchFileSnapshot(
         resolveFileSnapshotPath(import.meta.url, "span-events.json"),
       );
-      await expect(
+      await matchFileSnapshot(
         formatJsonFileSnapshot(summaries.payloadSummary),
-      ).toMatchFileSnapshot(
         resolveFileSnapshotPath(import.meta.url, "log-payloads.json"),
       );
     });
diff --git a/e2e/scripts/run-canary-tests-docker.mjs b/e2e/scripts/run-canary-tests-docker.mjs
index 9b75bb175..2ca46b70a 100644
--- a/e2e/scripts/run-canary-tests-docker.mjs
+++ b/e2e/scripts/run-canary-tests-docker.mjs
@@ -19,6 +19,7 @@ const ALLOWED_ENV_KEYS = [
   "GEMINI_API_KEY",
   "GOOGLE_API_KEY",
   "COHERE_API_KEY",
+  "COPILOT_API_KEY",
   "CURSOR_API_KEY",
   "GROQ_API_KEY",
   "OPENAI_API_KEY",
diff --git a/e2e/scripts/run-canary-tests.mjs b/e2e/scripts/run-canary-tests.mjs
index a59f8017f..b27624bcc 100644
--- a/e2e/scripts/run-canary-tests.mjs
+++ b/e2e/scripts/run-canary-tests.mjs
@@ -64,7 +64,7 @@ async function getCanaryTestFiles() {
   return [...testFiles].sort();
 }
 
-async function runVitest(testFiles) {
+async function runVitest(testFiles, { update = false } = {}) {
   const env = {
     ...process.env,
     BRAINTRUST_E2E_MODE: "canary",
@@ -76,8 +76,12 @@ async function runVitest(testFiles) {
     BRAINTRUST_E2E_CASSETTE_MODE: "passthrough",
   };
 
+  const vitestArgs = ["exec", "vitest", "run"];
+  if (update) vitestArgs.push("--update");
+  vitestArgs.push(...testFiles);
+
   const exitCode = await new Promise((resolve, reject) => {
-    const child = spawn(PNPM_COMMAND, ["exec", "vitest", "run", ...testFiles], {
+    const child = spawn(PNPM_COMMAND, vitestArgs, {
       cwd: E2E_ROOT,
       env,
       stdio: "inherit",
@@ -95,4 +99,5 @@ if (testFiles.length === 0) {
   throw new Error("No canary e2e scenarios are configured.");
 }
 
-await runVitest(testFiles);
+const update = process.argv.includes("--update");
+await runVitest(testFiles, { update });