- New `lib/auth-secret.js` is the single source of truth for `JWT_SECRET`
and the canonical `JWT_TOKEN_TTL = '24h'`. Module throws at import time
if `process.env.JWT_SECRET` is unset — no silent fallback to the literal
`'your-secret-key-change-in-production'`.
- 7 callers refactored to import from the helper:
lib/permission-middleware.js
pages/api/auth-utils.js (also drops unused `'7d'` → JWT_TOKEN_TTL)
pages/api/auth/login.js (also routes via auth-utils.generateToken)
pages/api/auth/register.js (same)
pages/api/auth/verify.js (Brief 2 still owns the no-token admin branch)
pages/api/favorites.js
pages/api/users/search.js
- `process.env.JWT_SECRET` now appears exactly once in the JS source
(lib/auth-secret.js). `your-secret-key-change-in-production` is gone.
- TTL drift reconciled: auth-utils used `'7d'`, login/register used
inline `'24h'`. Both now route through imported `JWT_TOKEN_TTL` (24h).
Pre-deploy reminder: Vercel must have `JWT_SECRET` set before merge or
serverless functions refuse to boot. Existing tokens (signed against the
fallback literal) will be invalidated — users will need to log in again.
Resolves AGENTS.md gotcha #3. Brief 2/3/4/5 still pending in convoy.
Convoy: fix-auth-bypass / Brief 1
Co-authored-by: Cursor <cursoragent@cursor.com>
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