## Description
Adds automatic key failover for centralized OpenAI provider, covering both chat completions and responses APIs. Same shape as the Anthropic PR: each upstream call walks the configured key pool, keys are marked **temporary** on 429 (with cooldown from `Retry-After`) and **permanent** on 401/403. Each agentic-loop iteration gets its own fresh walker so a tool-call continuation can fail over independently of the initial request.
BYOK is unchanged: BYOK requests run as a single attempt with no failover.
## Changes
- `config.OpenAI` carries a `KeyPool`. `Key` remains for BYOK Authorization Bearer set per interception.
- Chat completions blocking interceptor: walks the pool via `newChatCompletionWithKeyFailover`, marks keys on key-specific failures, returns on first success or non-failover error.
- Chat completions streaming interceptor: per-iteration walker. Pre-stream failures fail over to the next key; mid-stream errors are relayed as SSE events.
- Responses blocking interceptor: extracts `newResponseWithKeyFailover` parallel to chatcompletions.
- Responses streaming interceptor: per-iteration walker, retains the existing buffer-then-forward design.
## Related Issues
Related to: https://github.com/coder/internal/issues/1446
Related to: https://linear.app/codercom/issue/AIGOV-197/aibridge-automatic-key-failover-for-bridged-and-passthrough-routes
## Follow-up PRs
- Bedrock multi-key support.
- Refactor provider vs interceptor config separation.
- Record the actually-used key in the interception credential hint after failover.
> [!NOTE]
> Initially generated by Claude Opus 4.7, modified and reviewed by @ssncferreira
## Description
Adds automatic key failover for centralized Anthropic provider. When a key pool is configured, each upstream call walks the pool and tries keys in order until one succeeds or the pool is exhausted. Keys are marked **temporary** on 429 (with cooldown from `Retry-After`) and **permanent** on 401/403. Errors that aren't key-specific don't trigger failover. Each agentic-loop iteration gets its own fresh walker, so a tool-call continuation can fail over independently of the initial request.
BYOK is unchanged: BYOK requests run as a single attempt with no failover.
## Changes
- `config.Anthropic` carries a `KeyPool`. `Key` remains for BYOK X-Api-Key set per interception.
- Blocking interceptor: walks the pool, marks keys on key-specific failures, returns on first success or non-failover error.
- Streaming interceptor: per-iteration walker. Pre-stream failures fail over to the next key; mid-stream errors are relayed as SSE events.
- New `keypool` error types: `TransientExhaustionError` (carries soonest cooldown) and `ErrPermanentExhaustion`. Replace the prior `ErrAllKeysExhausted`.
- Error responses now consistently include the outer `"type": "error"` field.
## Related Issues
Related to: https://github.com/coder/internal/issues/1446
Related to: https://linear.app/codercom/issue/AIGOV-197/aibridge-automatic-key-failover-for-bridged-and-passthrough-routes
## Follow-up PRs
- Bedrock multi-key support.
- Refactor provider vs interceptor config separation.
- Record the actually-used key in the interception credential hint after failover.
> [!NOTE]
> Initially generated by Claude Opus 4.7, modified and reviewed by @ssncferreira
## Description
Removes 429 (Too Many Requests) from the circuit breaker failure conditions. Rate limiting is now handled by automatic key failover instead of tripping the circuit breaker.
## Changes
`DefaultIsFailure` no longer treats 429 as a circuit breaker failure. The circuit breaker now only trips on server overload responses (503, 529).
Tests and integration tests updated to use 503 instead of 429 for tripping circuits. Description strings in deployment config updated to reflect the change.
Closes https://github.com/coder/internal/issues/1445
> [!NOTE]
> Initially generated by Coder Agents, modified and reviewed by @ssncferreira
## Description
Adds the `aibridge/keypool` package, a thread-safe key pool with per-key state tracking and cooldown expiry. This PR introduces the package only; wiring it into the aibridge providers and coder configuration will happen in upstream PRs.
## Changes
Each key is in one of three states: **Valid** (available), **Temporary** (rate-limited with cooldown expiry), or **Permanent** (revoked/unauthorized, terminal until restart). The state is derived from the key fields rather than stored explicitly: once a cooldown expires, the key is valid again without any external action.
A `Walker` provides per-request key traversal using a primary-with-fallback strategy: each request walks the pool from index 0, skipping unavailable keys, so the first key is always preferred when healthy. Walkers are independent, so concurrent requests traverse the pool without interfering with each other.
`MarkTemporary` preserves the longer cooldown when concurrent requests both mark the same key.
Relates to https://github.com/coder/internal/issues/1445
> [!NOTE]
> Initially generated by Coder Agents, modified and reviewed by @ssncferreira
> AI tools where used when creating this PR
This PR removes environment variable parsing from `/aibridge` directory.
Added env variables/flags for dump dir as coder options.
Only added to new indexed provider options
(`CODER_AIBRIDGE_PROVIDER_<N>_*`) not to deprecated legacy env variables
(`CODER_AIBRIDGE_ANTHROPIC_*` and `CODER_AIBRIDGE_OPENAI_KEY_*`).
Reverted adding `MaxRetries` option as it will be removed soon due to
key failover work:
https://github.com/coder/coder/pull/24783#discussion_r3155544808
> AI tools where used when creating this PR
This PR:
* removes references to aibridge repository from coder docs
* updates aibdrige/README.md
* makes it clear aibridge (keeping old name) is a handler not a separate
process
* updates outdated sections about: metrics, recorded interface and
supported paths.
---------
Co-authored-by: Susana Ferreira <susana@coder.com>
> AI tools where used when creating this PR
Updates `AGENTS.md` to reflect that `/aibridge` is now a directory in
coder/coder repo not a separate repo.
*Disclaimer: implemented by a Coder Agent using Claude Opus 4.6*
Porting https://github.com/coder/aibridge/pull/277 to coder/coder after
the [aibridge code move](https://github.com/coder/coder/pull/24190).
## Summary
Fixes client detection and session ID tracking for the [Charm
Crush](https://github.com/charmbracelet/crush) AI coding client.
## Changes
### Bug fix: User-Agent matching
The actual Crush user-agent is `Charm-Crush/{version}
(https://charm.land/crush)` (hyphenated), but `GuessClient` only checked
for `charm crush/` (space-separated). After lowercasing,
`Charm-Crush/0.2.0` becomes `charm-crush/0.2.0`, which did not match the
`charm crush/` prefix.
Now matches both formats for backwards compatibility.
### Session ID tracking
Adds an explicit `ClientCrush` case to `GuessSessionID`. Crush does not
currently send a session ID header to upstream AI providers, so this
returns `nil` (consistent with how `ClientZed`, `ClientRoo`, and
`ClientCursor` are handled).
### Tests
- Added `charm_crush_hyphen` test case for `GuessClient` using the real
user-agent format.
- Added `crush_returns_empty` test case for `GuessSessionID`.
This PR merges code from `coder/aibridge` repository into `coder/coder`.
It was split into 4 PRs for easier review but stacked PRs will need to
be merged into this PR so all checks pass.
* https://github.com/coder/coder/pull/24190 -> raw code copy (this PR,
before merging PRs on top of it, it was just 1 commit:
https://github.com/coder/coder/commit/70d33f33200c7e77df910957595715f81f9bec24)
* https://github.com/coder/coder/pull/24570 -> update imports in
`coder/coder` to use copied code
* https://github.com/coder/coder/pull/24586 -> linter fixes and CI
integration (also added README.md)
* https://github.com/coder/coder/pull/24571 -> added exclude to
scripts/check_emdash.sh check
Original PR message (before PR squash):
Moves coder/aibridge code into coder/coder repository.
Omitted files:
- `go.mod`, `go.sum`, `.gitignore`, `.github/workflows/ci.yml,`
`Makefile`, `LICENSE`, `README.md` (modified README.md is added later)
- `.github`, `example`, `buildinfo,` `scripts` directories
Simple verification script (will list omitted files)
```
tmp=$(mktemp -d)
echo "$tmp"
git clone --depth=1 https://github.com/coder/aibridge "$tmp/aibridge"
git clone --depth=1 --branch pb/aibridge-code-move https://github.com/coder/coder "$tmp/coder"
diff -rq --exclude=.git "$tmp/aibridge" "$tmp/coder/aibridge"
# rm -rf "$tmp"
```
Susana Ferreira