## 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>
* Adds new features table to top of v4 upgrade guide
* Adds wait idempotency to wait-until, wait-for, and wait-for-token pages
* Adds new priority docs page and updates the v4 upgrade guide
* Adds new task lifecycle hooks
* Removes the message about requiring tasks to be exported
* Adds new global lifecycle hooks section
* Moves sections from upgrade guide into the table
* Adds hidden task page
* Improves the global lifecycle hooks section
* Updates middleware and locals section
* Adds new useWaitToken page to the react hooks section
* Adds a new ai.tool section
* Moves Docker (legacy) page into self-hosting section
* Removes known issues from v4 upgrade guide
* Replace “toolTask” with “ai.tool” in the Streams page example
* Renames guide to “Migrating from v3” and adds redirect
* Remove references to v4
* Removes changelog from migration guide
* The installation guide now references `@latest update`
* Changes all references from `/sdk/v3` to `/sdk`
* Updates @v4-beta to @latest
* Fixed broken link
* Fixes broken link
* Adds an upgrade to v4 using AI section
* Fixes 2 broken links
* Adds an entry for targetting preview branches
* Updates the run statuses
* Adds boolean helpers section to the runs and realtime pages
* Updates the concurrency page
* Updates the test page to include the new options
* Adds SDK and curl options for the preview branch targeting
* Updates new bulk actions page
* Remove the releasing concurrency section
* Got rid of some more @v4-beta mentions
* Improved rate limit docs
* Improved migrating docs
* Removed commented sections of the docs
* useWaitToken hook
* Fixed the description
* Fix for missing test image
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Co-authored-by: Matt Aitken <matt@mattaitken.com>
Co-authored-by: Dan <8297864+D-K-P@users.noreply.github.com>
Eric Allam