The human path refused every token in production (503
human_signin_not_ready) because no verifier existed. api/app/hub_jwt.py
verifies hub access tokens against account.windyword.ai's JWKS:
- RS256 only (closes alg:none and HS256-with-public-key confusion)
- iss must be "windy-identity" — what hub ACCESS tokens carry (observed
live); id_tokens (discovery-URL issuer) are not accepted as bearers
- aud optional today, must name Windy Git when present; hub_require_aud
flips it mandatory once the hub emits it. PyJWT's own aud check is off
on purpose: it rejects ANY aud-bearing token when no audience is given.
- type must be human; identity = windy_identity_id, never sub (per-row id)
- production verifies even if require_verified_jwt is off
11 behavioral tests sign real RS256 tokens with a local key.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
