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stack/docs/scratchpads/p5-004-authentik-sso.md
Jason Woltje e92de12cf9
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feat(auth): add Authentik OIDC adapter
Refs #96
2026-03-13 14:42:05 -05:00

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# P5-004 Scratchpad
- Objective: Add optional Authentik OIDC SSO adapter via Better Auth genericOAuth.
- Task ref: P5-004
- Issue ref: #96
- Plan:
1. Inspect auth/gateway surfaces and Better Auth plugin shape.
2. Add failing coverage for auth config/startup validation where feasible.
3. Implement adapter, docs, and warnings.
4. Run targeted typechecks, lint, and review.
- TDD note: no low-friction auth plugin or bootstrap-env test seam exists for `packages/auth/src/auth.ts` or `apps/gateway/src/main.ts`. This change is configuration-oriented and does not alter an existing behavioral contract with a current test harness. I skipped new tests for this pass and relied on exact typecheck/lint/test commands plus manual review.
- Changes:
1. Added conditional Better Auth `genericOAuth` plugin registration for the `authentik` provider in `packages/auth/src/auth.ts`.
2. Added a soft startup warning in `apps/gateway/src/main.ts` for incomplete Authentik env configuration.
3. Added `docs/plans/authentik-sso-setup.md` with env, redirect URI, and test-flow guidance.
4. Confirmed `packages/auth/src/index.ts` already exports `AuthConfig`; no change required there.
- Verification:
1. `pnpm --filter @mosaic/db build`
2. `pnpm --filter @mosaic/auth typecheck`
3. `pnpm --filter @mosaic/gateway typecheck`
4. `pnpm lint`
5. `pnpm format:check`
6. `pnpm --filter @mosaic/auth test`
7. `pnpm --filter @mosaic/gateway test`
- Results:
1. `@mosaic/auth` typecheck passed after replacing the non-existent `enabled` field with conditional plugin registration.
2. `@mosaic/gateway` typecheck passed.
3. Repo lint passed.
4. Prettier check passed after formatting `apps/gateway/src/main.ts`.
5. `@mosaic/auth` tests reported `No test files found, exiting with code 0`.
6. `@mosaic/gateway` tests passed: `3` files, `20` tests.
- Review:
1. Manual review of the diff found no blocker issues.
2. External `codex-code-review.sh --uncommitted` was attempted but did not return a usable verdict in-session; no automated review findings were available from that run.
- Situational evidence:
1. Provider activation is env-gated by `AUTHENTIK_CLIENT_ID`.
2. Misconfigured optional SSO surfaces a warning instead of crashing gateway startup.
3. Setup doc records the expected redirect path: `{BETTER_AUTH_URL}/api/auth/callback/authentik`.