The upstream OpenAI WebSocket endpoint requires the
OpenAI-Beta: responses_websockets=2026-02-06 header. Set it
automatically when the client doesn't provide it.
Also capture and log the response body on non-429 WebSocket
handshake failures to surface the actual error from upstream.
The HTTP path rewrites utilization headers for external users via
rewriteResponseHeadersForExternalUser to show aggregated values.
The WebSocket upgrade headers were also rewritten, but in-band
codex.rate_limits events were forwarded unmodified, leaking
per-credential utilization to external users.
WebSocket 101 upgrade responses do not include utilization headers
(confirmed via codex CLI source). Rate limit data is delivered
exclusively through in-band events (codex.rate_limits and error
events with status 429).
Previously, updateStateFromHeaders unconditionally bumped lastUpdated
even when no utilization headers were found, which suppressed polling
and left credential utilization permanently stale during WebSocket
sessions.
- Only bump lastUpdated when actual utilization data is parsed
- Parse in-band codex.rate_limits events to update credential state
- Detect in-band 429 error events to markRateLimited
- Fix WebSocket 429 retry to update old credential state before retry
Extract credential interface from *defaultCredential to support both
default (OAuth) and external (remote proxy) credential types. External
credentials proxy requests to a remote ccm/ocm instance with bearer
token auth, poll a /status endpoint for utilization, and parse
aggregated rate limit headers from responses.
Add allow_external_usage user flag to control whether balancer/fallback
providers may select external credentials. Add status endpoint
(/ccm/v1/status, /ocm/v1/status) returning averaged utilization across
eligible credentials. Rewrite response rate limit headers for external
users with aggregated values.
CCM: Fix 1M context detection - use prefix match for versioned
beta strings (e.g. "context-1m-2025-08-07") and include cache
tokens in the 200K threshold check per Anthropic billing docs.
OCM: Add GPT-5.4 family pricing (standard/priority/flex) with
extended context (>272K) premium pricing support. Add context
window tracking to usage combinations, mirroring CCM's pattern.
Update normalizeGPT5Model defaults to latest known models.
Support the OpenAI Responses WebSocket API (`wss://.../v1/responses`)
for bidirectional frame proxying with usage tracking.
Fix Codex CLI client config examples to use profiles and correct flags.
Update openai-go v3.24.0 → v3.26.0.
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