A browser client served from a different origin than the Gateway never
learns the id of the run it just created, so a brand-new thread keeps its
placeholder route for the whole session and every action gated on an
established thread — edit and rerun, regenerate, branch — stays hidden
until the page is reloaded.
Run-creating routes return the run's id in `Content-Location`, and the
LangGraph SDK resolves run metadata from that header alone. It is not
CORS-safelisted, so a cross-origin response hides it from JS unless the
server lists it in `Access-Control-Expose-Headers`. `useStream`'s
`onCreated` therefore never fires and the app cannot rewrite its route.
Expose it. `GATEWAY_CORS_ORIGINS` is a supported deployment mode, so the
CORS middleware has to carry everything that mode needs to read. Same-origin
nginx deployments are unaffected because CORS never applies to them.
* fix(nginx): defer cors to gateway allowlist
Remove proxy-level wildcard CORS handling so browser origins are controlled by the Gateway allowlist and stay aligned with CSRF origin checks.
* docs: document gateway cors allowlist
Clarify that same-origin nginx access needs no CORS headers while split-origin or port-forwarded browser clients must opt in with GATEWAY_CORS_ORIGINS.
* docs(gateway): record cors source of truth
Document that Gateway CORSMiddleware and CSRFMiddleware share GATEWAY_CORS_ORIGINS as the split-origin source of truth.
* fix(gateway): align cors origin normalization
* docs: clarify gateway langgraph routing
* docs(gateway): update runtime routing note
* fix(security): allow disabling API docs in production via GATEWAY_ENABLE_DOCS
Expose /docs, /redoc, and /openapi.json only when GATEWAY_ENABLE_DOCS=true
(default). Setting GATEWAY_ENABLE_DOCS=false disables all three endpoints,
preventing unauthorized API surface discovery in production deployments.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* test(security): add unit tests and docs for GATEWAY_ENABLE_DOCS
Add 7 tests covering default behavior, env var parsing (case-insensitive,
fail-closed), endpoint visibility, and health endpoint independence.
Update CONFIGURATION.md and CLAUDE.md with the new toggle.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* style(security): apply ruff formatting to gateway app.py
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
