feat(eve): cover the full eve 0.30 event surface

.changeset/eve-030-event-surface.md

@@ -0,0 +1,19 @@
+---
+"evlog": minor
+---
+
+Cover the eve 0.30 event surface. **`evlog/eve` now requires eve >= 0.30** — the peer range moves from `>=0.24.3`. The eve integration is still beta and its peer floor moves with it, so this ships as a minor; nothing outside `evlog/eve` is affected. Agents on an older eve keep working on the previous evlog — upgrade eve first.
+
+The wide event now carries what eve started reporting since 0.24:
+
+- `eve.runtime` — eve version, agent id, model, and the deployed git sha, branch and date, from `session.started`
+- `eve.parent` — parent and root session ids for a subagent run, so a drain can rebuild the delegation tree
+- `eve.authorizations` — connection sign-ins with their outcome, reason and duration; a turn parked on one ends as `eve.phase: 'awaiting-authorization'`
+- `eve.compaction` — how many compactions ran, on which model, and how full the context was when the first one triggered
+- `eve.contextCleared`, `eve.stepFailures` and `eve.failedSteps` — a model call that failed and was retried no longer disappears from a turn that ends up succeeding
+- `ai.costUsd` — the cost eve reports, used in place of the `cost` pricing map when available. `ai.model` falls back to the model reported at session start, so `model` is only needed for dynamic-model agents
+- subagents record `durationMs` and a `started` status
+
+`message` replaces `redactMessage` with three modes: `'omit'` (default), `'preview'` (text truncated to `messagePreviewLength`, attachments reduced to their type and media type) and `'full'`. Attachment parts were previously not redacted at all. `redactMessage` still works and is deprecated.
+
+`sessionEvent: true` adds one wide event per session on top of the per-turn ones, rolling up turns, tokens, cost, tools used, compactions and authorizations — one row per conversation, which is what makes tail sampling useful on an agent.

packages/evlog/package.json

@@ -438,7 +438,7 @@
     "changelogen": "^0.6.2",
     "consola": "^3.4.2",
     "elysia": "^1.4.29",
-    "eve": "^0.24.3",
+    "eve": "^0.30.8",
     "express": "^5.2.1",
     "fastify": "^5.10.0",
     "h3": "^1.15.11",
@@ -463,7 +463,7 @@
     "@nestjs/common": ">=11.1.28",
     "@nuxt/kit": "^4.4.2",
     "@orpc/server": ">=1.14.8",
-    "eve": ">=0.24.3",
+    "eve": ">=0.30.0",
     "@tanstack/start-client-core": "^1.170.14",
     "ai": ">=6.0.168 <8.0.0",
     "elysia": ">=1.4.29",

packages/evlog/src/ai/index.ts

@@ -172,6 +172,11 @@ export interface AIEventData {
   totalDurationMs?: number
   embedding?: AIEmbeddingData
   estimatedCost?: number
+  /**
+   * Cost in dollars as reported by the runtime or provider, as opposed to
+   * {@link AIEventData.estimatedCost}, which is derived from a pricing map.
+   */
+  costUsd?: number
 }
 
 /**