## Summary
Three post-merge fixes for the AI Agents docs (#3226), all caught by
review after merge.
## Fixes
- **`onTurnComplete` examples now use `db.$transaction`** — both the
Database persistence "Complete example" and the Lifecycle hooks
reference example were doing two separate `await` calls
(`db.chat.update` then `db.chatSession.upsert`). That's the exact
non-atomic pattern the warning earlier on the persistence page calls out
as ❌: a refresh between the two writes reads a stale `lastEventId` and
duplicates the assistant message on resume. Both examples now use the
recommended atomic form.
- **Background injection self-review prose aligned with the code** — the
prose said "gpt-4o-mini" but the example above it had been swapped to
`claude-haiku-4-5`. The Anthropic-sweep script only touched code blocks;
this prose line wasn't picked up.
## Test plan
- [x] Both updated examples use `db.$transaction([...])`
- [x] Prose matches the model used in the code block
- [ ] Mintlify deployment passes
## Summary
Lands the full AI Agents documentation surface alongside the v4.5
release candidate of `@trigger.dev/sdk`. Covers `chat.agent` end to end
— defining agents, lifecycle hooks, the frontend transport, sub-agents,
recovery from cancel/crash/OOM, AI Prompts integration — and the
Sessions primitive that backs it.
## Coverage
- **Conceptual**: Overview, Quick Start, How it works.
- **Building agents**: Backend (`chat.agent` / `chat.createSession` /
raw primitives), Lifecycle hooks, Frontend transport, Server-side
`AgentChat`, Sessions reference, `chat.local` state primitive,
TypeScript types.
- **Features**: AI Prompts integration, Fast starts (Preload + Head
Start), Compaction, Pending Messages (steering), Background Injection
(`chat.inject` + `chat.defer`), Actions (undo / regenerate / edit),
Error handling.
- **Patterns (13)**: Sub-agents, Branching conversations, Code sandbox,
Database persistence, Persistence and replay, HITL, Tool result
auditing, Large payloads, Agent skills, OOM resilience, Recovery boot,
Trusted edge signals, Version upgrades.
- **Reference**: API Reference, Client Protocol (wire format), Testing
harness (`mockChatAgent`), MCP server tools, Upgrade guide, Changelog.
## Structure changes
- Top-level nav: AI → **Agents**, with sub-groups for *Building agents /
Features / Patterns / Reference*.
- New RC banner snippet on every page links to the supported AI SDK
versions table on the API Reference.
- All examples use Anthropic with `stopWhen: stepCountIs(15)`.
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Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Eric Allam