docs(openapi): add /auth/exchange — closes the gap that hid 2026-05-30 outage#203
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…-05-30 outage The 2026-05-30 prod-login outage chained 3 failures along /auth/exchange (client missing, preflight rejected, ACAC missing). Even with the new contract-CI gate (api #202), the bug class wasn't catchable because /auth/exchange was literally NOT in the OpenAPI spec — agents and the typed-client codegen pipeline had no contract to enforce. Adds the path with the full CORS contract documented in the description so any future regression to the headers / preflight rules is visible in the diff that breaks the snapshot-drift gate. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…tion That error code was emitted by an unreachable defence-in-depth arm that landed in api#201 and was removed before merge (requireName already rejects empty/whitespace name upstream of the redeploy branch). The DeployRequest description still mentioned it; tidied + clarified the upstream-rejection path.
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Why
The 2026-05-30 prod-login outage chained 3 failures along
/auth/exchange:Accept: application/json→ preflight rejected (web test(coverage): db/cache/nosql local providers to >=95% via source seams #151)Access-Control-Allow-Credentials: true(api fix(cors): AllowCredentials:true on api so dashboard /auth/exchange works (P0 follow-up) #198)Even with the new contract-CI gate (api #202), the bug class wasn't catchable because
/auth/exchangewas literally NOT in the OpenAPI spec — agents had no contract to enforce.What
Adds the
POST /auth/exchangepath with the full CORS contract in the description (Allow-Origin, Allow-Credentials, no-preflight, response shape). Snapshot regenerated.Any future regression to those headers / preflight rules is now visible in the diff that breaks the snapshot-drift gate.
Coverage
OpenAPI-spec text addition.
TestOpenAPI_*tests pass locally.