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# Tasks — `@suaveplan/api-auth-better-auth`
> Every checkbox MUST reflect work actually done in this change.
## 0. Pre-flight (non-negotiable)
- [x] 0.1 Confirm clean working tree (`git status` reports nothing) and no in-flight worktrees with uncommitted work (`git worktree list` then `git status` in each)
- [x] 0.2 If any worktrees exist under `.claude/worktrees/`, account for each one: still-active agent, work-pending-merge, or stale-and-prune. Stale worktrees MUST be removed (`git worktree remove`) before opening a new one — code that has been lost twice on main is the failure mode this guards against.
- [x] 0.3 Confirm the package set in `MANIFEST.md` matches `find packages -maxdepth 3 -name package.json` count. Drift here means a prior change archived without regenerating the manifest.
## 1. Spec authoring
- [x] 1.1 Read design doc §2.3 (auth contracts) end-to-end
- [x] 1.2 Read umbrella proposal (Stage 6)
- [x] 1.3 Read `openspec/AGENTS.md` Sections 13 and 14
- [x] 1.4 Draft `proposal.md`
- [x] 1.5 Draft `specs/api-auth-better-auth/spec.md`
- [x] 1.6 Every requirement has a `**Verified by:**` line
## 2. Implementation
- [x] 2.1 Scaffold `packages/api/api-auth-better-auth/`
- [x] 2.2 `src/options/options.ts` — `BetterAuthOptions` Zod schema
- [x] 2.3 `src/db/database.ts` — separate DB connection construction; lazy-init on first use
- [x] 2.4 `src/principal/map-user-to-principal.ts` — default mapping; pluggable
- [x] 2.5 `src/session/create-session.ts` — `createBetterAuthSession(opts)`; implements `auth.session`
- [x] 2.6 `src/provider/create-provider.ts` — `createBetterAuthProvider(opts)`; implements `auth.provider`; mounts routes at `routePrefix`
- [x] 2.7 `src/route-prefix/route-prefix.ts` — collision check vs host-reserved prefixes
- [x] 2.8 `src/oauth/github.ts` — GitHub OAuth provider wiring; canonical reference flow
- [x] 2.9 `src/instruments/instruments.ts` — OTel counters / histograms per proposal
- [x] 2.10 `src/error-codes.ts` — 10 `AUTH_BA_*` codes
- [x] 2.11 `./testing` subpath — re-export both conformance suites bound to Postgres-backed factories
- [x] 2.12 `src/index.ts` — explicit named re-exports
## 3. Tests
- [x] 3.1 Unit tests per module, every `it(...)` `{ timeout: 5000 }`
- [x] 3.2 `runAuthSessionConformance` + `runAuthProviderConformance` against Postgres container (`{ timeout: 30000 }`)
- [x] 3.3 `src/oauth/github-oauth.test.ts` — end-to-end with a mock OAuth server (`{ timeout: 60000 }`)
- [x] 3.4 `src/independence/session-without-provider.test.ts` — pins that the two sides are independently usable
- [x] 3.5 `tests/integration/postgres-better-auth.test.ts` (`{ timeout: 60000 }`) — register → login → protected route
- [x] 3.6 All tests import from `@suaveplan/testing/runner`
## 4. Documentation
- [x] 4.1 Sibling `.md` per implementation file
- [x] 4.2 `README.md` with `## Modules` AND a top-level note that two capability surfaces ship and may be wired independently
## 5. Pre-archive verification (the 5-gate triple)
- [x] 5.1 `bun run check` — 0/0/0
- [x] 5.2 `bunx turbo lint typecheck test --filter=@suaveplan/api-auth-better-auth` — green
- [x] 5.3 `bunx turbo test:coverage --filter=@suaveplan/api-auth-better-auth` — 100/100/100/100
- [x] 5.4 `bun scripts/openspec-conformance.ts @suaveplan/api-auth-better-auth` — exit 0
- [x] 5.5 `bunx turbo build --filter=@suaveplan/api-auth-better-auth` — green
## 6. Pre-archive 7-row checklist
- [x] 6.1 Generics on `Principal` mapping; `expectTypeOf` assertions
- [x] 6.2 `BetterAuthOptions` Zod-validated at the factory boundary
- [x] 6.3 Every `AUTH_BA_*` code thrown from production paths
- [x] 6.4 Strict-mode tested (session-only wiring, provider-only wiring, both wired)
- [x] 6.5 OTel instruments asserted against in-memory `MeterProvider`
- [x] 6.6 Lifecycle dedup: session resolution is idempotent across retries
- [x] 6.7 No retroactive tick
## 7. Archive
- [x] 7.1 Fold spec delta into `openspec/specs/api-auth-better-auth/spec.md`
- [x] 7.2 Move to `openspec/archive/<yyyy-mm-dd>-api-auth-better-auth/`
- [x] 7.3 Tick Stage-6 row in umbrella tasks
- [x] 7.4 Refresh `MANIFEST.md`