Adds `docs/ai-coder/agents/chat-api.md` — a concise guide for the
experimental `/api/experimental/chats` endpoints.
**What's included:**
- Authentication
- Quick start curl example
- Core workflow (create → stream → follow-up)
- All major endpoints: create, messages, stream, list, get, archive,
interrupt
- File uploads
- Chat status reference
Also marks all Coder Agents child pages as `early access` in
`docs/manifest.json`.
Adds a new **Enable Coder Agents** section to the Early Access doc
explaining how to activate the `agents` experiment flag via
`CODER_EXPERIMENTS` or `--experiments`.
## Changes
### `docs/ai-coder/agents/early-access.md`
- New **Enable Coder Agents** section with env var and CLI flag
examples.
- Note that the `agents` flag is excluded from wildcard (`*`) opt-in.
- Quick-start checklist: dashboard → Admin → configure provider/model →
start chatting.
- Link to GitHub issues for feedback.
### `docs/ai-coder/agents/index.md`
- Updated **Product status** from "internal preview" to "Early Access"
with a link to the early-access page for enablement instructions.
## Summary
- add chat model pricing metadata to the agents admin form and SDK
metadata
- split pricing into its own section and show default pricing as
placeholders
- apply default pricing when admins leave pricing fields blank
## Changes
- Add `"state": ["early access"]` to all child pages under Coder Agents
in `docs/manifest.json` (Architecture, Models, Platform Controls, Early
Access).
- Point the Coder Agents video `<source>` directly at
`raw.githubusercontent.com` instead of the `github.com/blob/` URL with
`?raw=true`.
Adds a new child page at `/docs/ai-coder/agents/early-access` describing
the Coder Agents Early Access, including what it includes, what it does
not include, feature scope, licensing, and how to provide feedback.
This change adds support for image attachments to chat via add button
and clipboard paste. Files are stored in a new `chat_files` table and
referenced by ID in message content. File data is resolved from storage
at LLM dispatch time, keeping the message content column small.
Upload validates MIME types via content type or content sniffing against
an allowlist (png, jpeg, gif, webp). The retrieval endpoint serves files
with immutable caching headers. On the frontend, uploads start eagerly
on attach with a background fetch to pre-warm the browser HTTP cache so
the timeline renders instantly after send.
Adds a docs page under /docs/ai-coder/agents describing our philosophy
on platform team control over agent behavior: admin-level configuration,
zero developer options, enforcement over defaults. Covers what's
available today (providers, models, system prompt, template routing) and
where we're headed (usage analytics, infra-level enforcement, tool
customization).
Matt Vollmer