diff --git a/.changeset/ignore-ai-sdk-devtools.md b/.changeset/ignore-ai-sdk-devtools.md
new file mode 100644
index 000000000..6b74b41b7
--- /dev/null
+++ b/.changeset/ignore-ai-sdk-devtools.md
@@ -0,0 +1,5 @@
+---
+"eve": patch
+---
+
+Treat AI SDK `.devtools` like other generated directories: ignore it in `eve dev` watching, agent discovery, and source snapshots so generation writes do not recompile or warn.
diff --git a/packages/eve/src/discover/agent.integration.test.ts b/packages/eve/src/discover/agent.integration.test.ts
index 90cd2bb19..fb726983c 100644
--- a/packages/eve/src/discover/agent.integration.test.ts
+++ b/packages/eve/src/discover/agent.integration.test.ts
@@ -486,7 +486,7 @@ describe("discoverAgent (memory)", () => {
 
   it("silently ignores generated runtime directories", async () => {
     const project = buildMemoryAgentProject({
-      agentDirectories: [".eve", ".next", ".output", ".vercel", "node_modules"],
+      agentDirectories: [".devtools", ".eve", ".next", ".output", ".vercel", "node_modules"],
       agentFiles: {
         "instructions.md": "You are a precise assistant.",
       },
diff --git a/packages/eve/src/discover/filesystem.ts b/packages/eve/src/discover/filesystem.ts
index 80d837099..814233d3c 100644
--- a/packages/eve/src/discover/filesystem.ts
+++ b/packages/eve/src/discover/filesystem.ts
@@ -21,6 +21,7 @@ export const PROJECT_MARKER_FILE_NAMES = ["package.json", "vercel.json"] as cons
 
 const PROJECT_MARKER_FILE_NAME_SET = new Set<string>(PROJECT_MARKER_FILE_NAMES);
 const GENERATED_AGENT_DIRECTORY_NAMES = new Set<string>([
+  ".devtools",
   ".eve",
   ".next",
   ".output",
diff --git a/packages/eve/src/internal/nitro/dev-runtime-source-snapshot-copy.ts b/packages/eve/src/internal/nitro/dev-runtime-source-snapshot-copy.ts
index 64f65ec43..24575e77a 100644
--- a/packages/eve/src/internal/nitro/dev-runtime-source-snapshot-copy.ts
+++ b/packages/eve/src/internal/nitro/dev-runtime-source-snapshot-copy.ts
@@ -17,6 +17,7 @@ import {
 } from "#internal/nitro/dev-runtime-source-snapshot.js";
 
 const SNAPSHOT_SKIP_NAMES = new Set([
+  ".devtools",
   ".generated",
   ".eve",
   ".git",
diff --git a/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.scenario.test.ts b/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.scenario.test.ts
index 5d4176cbe..65055de97 100644
--- a/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.scenario.test.ts
+++ b/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.scenario.test.ts
@@ -131,6 +131,7 @@ describe("startAuthoredSourceWatcher", () => {
 
     try {
       const ignored = getIgnoredPredicate();
+      expect(ignored(join(host.appRoot, ".devtools", "generations.json"))).toBe(true);
       expect(ignored(join(host.appRoot, ".eve", "dev-hosts", "candidate"))).toBe(true);
       expect(ignored(join(host.appRoot, "node_modules", "eve"))).toBe(true);
       expect(ignored(join(host.appRoot, "agent", "tools", "weather.ts"))).toBe(false);
diff --git a/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.ts b/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.ts
index 16dc0f551..1623c45f9 100644
--- a/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.ts
+++ b/packages/eve/src/internal/nitro/host/dev-authored-source-watcher.ts
@@ -26,6 +26,7 @@ const WATCHED_LOCKFILE_NAMES = [
 const WATCH_ROOT_MARKER_NAMES = [".git", "pnpm-workspace.yaml"] as const;
 const TS_CONFIG_GLOB_NAME = "tsconfig.*.json";
 const WATCHER_IGNORED_DIRECTORY_NAMES = new Set([
+  ".devtools",
   ".generated",
   ".eve",
   ".git",