# Tasks — `@suaveplan/api-tenant-resolver-subdomain`

## 0. Pre-flight (non-negotiable)

- [ ] 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)
- [ ] 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.
- [ ] 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 (§6 step 4)
- [x] 1.2 Read `openspec/AGENTS.md` Sections 13 and 14
- [x] 1.3 Draft `proposal.md`
- [x] 1.4 Draft `specs/api-tenant-resolver-subdomain/spec.md`
- [x] 1.5 Every requirement carries `**Verified by:**`

## 2. Implementation

- [ ] 2.1 Scaffold `packages/api/api-tenant-resolver-subdomain/`
- [ ] 2.2 `src/resolver/` — `createSubdomainTenantResolver`
- [ ] 2.3 `src/forwarded/` — trusted-proxy CIDR enforcement
- [ ] 2.4 `src/validate/` — label validator
- [ ] 2.5 `src/error-codes.ts`
- [ ] 2.6 `src/index.ts` — explicit named re-exports

## 3. Tests

- [ ] 3.1 `src/resolver/resolver.test.ts`
- [ ] 3.2 `src/forwarded/forwarded.test.ts`
- [ ] 3.3 `src/resolver/resolver.spec-conformance.test.ts`
- [ ] 3.4 `tests/dep-graph.test.ts`
- [ ] 3.5 Every `it(...)` carries `{ timeout: 5000 }`

## 4. Documentation

- [ ] 4.1 Sibling `.md` per implementation `.ts`
- [ ] 4.2 `README.md` `## Modules`
- [ ] 4.3 Update `CLAUDE.md` package listing

## 5. Pre-archive verification (the 5-gate triple)

- [ ] 5.1 `bun run check`
- [ ] 5.2 `bunx turbo lint typecheck test --filter=@suaveplan/api-tenant-resolver-subdomain`
- [ ] 5.3 `bunx turbo test:coverage --filter=@suaveplan/api-tenant-resolver-subdomain` — 100/100/100/100
- [ ] 5.4 `bun scripts/openspec-conformance.ts @suaveplan/api-tenant-resolver-subdomain`
- [ ] 5.5 `bunx turbo build --filter=@suaveplan/api-tenant-resolver-subdomain`

## 6. Pre-archive 7-row checklist

- [ ] 6.1 Generics threaded
- [ ] 6.2 Zod schemas wired at host-config ingestion
- [ ] 6.3 Every `TENANT_SUBDOMAIN_*` code thrown by a production path
- [ ] 6.4 Strict-mode: invalid label → 400 in strict, → null in non-strict; X-Forwarded-Host only trusted from CIDRs
- [ ] 6.5 OTel `api.tenant.resolves_total{resolver="subdomain"}` asserted
- [ ] 6.6 Lifecycle dedup — resolver is pure
- [ ] 6.7 No retroactive tick

## 7. Archive

- [ ] 7.1 Fold spec delta into `openspec/specs/api-tenant-resolver-subdomain/spec.md`
- [ ] 7.2 Move folder to archive
- [ ] 7.3 Tick `8.16` in umbrella tasks
- [ ] 7.4 Refresh `MANIFEST.md`