---
id: S02
parent: M019
milestone: M019
provides:
  - User and InviteCode models (backend/models.py)
  - Auth router at /api/v1/auth/* (register, login, me, update profile)
  - get_current_user and require_role FastAPI dependencies (backend/auth.py)
  - AuthContext with useAuth() hook (frontend/src/context/AuthContext.tsx)
  - ProtectedRoute component for gating routes (frontend/src/components/ProtectedRoute.tsx)
  - SidebarNav component for dashboard layout (exported from CreatorDashboard.tsx)
  - Auth API client functions with TypeScript types (frontend/src/api/public-client.ts)
requires:
  []
affects:
  - S03
  - S05
key_files:
  - backend/models.py
  - backend/auth.py
  - backend/schemas.py
  - backend/routers/auth.py
  - backend/main.py
  - backend/requirements.txt
  - alembic/versions/016_add_users_and_invite_codes.py
  - backend/tests/conftest.py
  - backend/tests/test_auth.py
  - frontend/src/context/AuthContext.tsx
  - frontend/src/api/public-client.ts
  - frontend/src/pages/Login.tsx
  - frontend/src/pages/Register.tsx
  - frontend/src/components/ProtectedRoute.tsx
  - frontend/src/pages/CreatorDashboard.tsx
  - frontend/src/pages/CreatorSettings.tsx
  - frontend/src/App.tsx
key_decisions:
  - D036: Direct bcrypt instead of passlib[bcrypt] — passlib incompatible with bcrypt>=4.1
  - D037: HS256 JWT with 24h expiry, OAuth2PasswordBearer at /api/v1/auth/login
  - AppShell extraction pattern for root-level context consumers
  - AUTH_TOKEN_KEY constant in public-client.ts for shared localStorage key
  - SidebarNav exported from CreatorDashboard for reuse in CreatorSettings
  - seed_invite_codes() as callable async function, not auto-invoked at startup
patterns_established:
  - Auth fixture chain: invite_code → registered_user → auth_headers for integration tests
  - ProtectedRoute with returnTo param for post-login redirect
  - AppShell extraction for components that both provide and consume React context
  - Auto-inject Authorization header from localStorage in API client
  - CSS module per page with dark theme custom properties for dashboard pages
observability_surfaces:
  - GET /api/v1/auth/me validates token and returns user profile (auth health check)
  - JWT decode errors surface as 401 with detail message
  - Invite code validation returns specific 403 messages (invalid, expired, exhausted)
drill_down_paths:
  - .gsd/milestones/M019/slices/S02/tasks/T01-SUMMARY.md
  - .gsd/milestones/M019/slices/S02/tasks/T02-SUMMARY.md
  - .gsd/milestones/M019/slices/S02/tasks/T03-SUMMARY.md
  - .gsd/milestones/M019/slices/S02/tasks/T04-SUMMARY.md
duration: ""
verification_result: passed
completed_at: 2026-04-03T22:04:22.116Z
blocker_discovered: false
---

# S02: [A] Creator Authentication + Dashboard Shell

**Full-stack creator auth system: User/InviteCode models, JWT auth API with 20 passing tests, React auth context with login/register pages, protected dashboard shell with sidebar nav and profile settings.**

## What Happened

This slice delivered the complete creator authentication and dashboard infrastructure across four tasks spanning backend models, API endpoints, frontend auth context, and the dashboard UI shell.

**T01 — Auth Foundation:** Added User and InviteCode SQLAlchemy models with UserRole enum, Alembic migration 016, bcrypt password hashing, JWT encode/decode utilities, FastAPI get_current_user dependency with OAuth2PasswordBearer, and five Pydantic auth schemas. The migration was hand-written (no live DB for autogenerate).

**T02 — Auth API:** Built the /api/v1/auth router with POST /register (invite code validation, email uniqueness, optional creator linking), POST /login (JWT issuance), GET /me, and PUT /me (display name and password update). Added seed_invite_codes() for the default alpha code. Wrote 20 integration tests covering happy paths, error paths (invalid/expired/exhausted codes, duplicate email, wrong password, invalid JWT), boundary conditions, and public endpoint non-regression. Switched from passlib to direct bcrypt due to passlib incompatibility with bcrypt>=4.1.

**T03 — Frontend Auth:** Created AuthContext provider with login/register/logout and session rehydration from localStorage. Added auth API functions with TypeScript types to public-client.ts, with automatic Authorization header injection. Built Login and Register pages with CSS modules, form validation, and error handling. Wired AuthProvider and routes into App.tsx.

**T04 — Dashboard Shell:** Created ProtectedRoute component with returnTo redirect. Built CreatorDashboard with two-column sidebar layout (Dashboard active, Content placeholder, Settings link) using NavLink. Built CreatorSettings reusing the SidebarNav, with profile edit and password change forms. Extracted AppShell from App to allow useAuth() inside AuthProvider. Added AuthNav showing user state in the header.

## Verification

All slice verification checks pass:

1. Backend model imports (User, InviteCode, UserRole) — ✅
2. Auth utility imports (hash_password, verify_password, create_access_token, decode_access_token) — ✅
3. Schema imports (RegisterRequest, LoginRequest, TokenResponse, UserResponse, UpdateProfileRequest) — ✅
4. Alembic migration 016 exists with users and invite_codes tables — ✅
5. Frontend build (`npm run build`) — ✅ zero TypeScript errors, built in 944ms
6. All required files exist: AuthContext.tsx, Login.tsx, Register.tsx, ProtectedRoute.tsx, CreatorDashboard.tsx, CreatorSettings.tsx — ✅
7. All CSS modules exist: Login.module.css, Register.module.css, CreatorDashboard.module.css, CreatorSettings.module.css — ✅
8. App.tsx wiring: AuthProvider, ProtectedRoute, useAuth all present — ✅
9. 20 auth integration tests pass in Docker container on ub01 — ✅
10. Existing public API tests unaffected by auth changes — ✅

## Requirements Advanced

- R028 — Creator auth system implemented: invite-code registration, JWT login, profile management. Dashboard shell with protected routes ready for consent UI in S03.

## Requirements Validated

None.

## New Requirements Surfaced

None.

## Requirements Invalidated or Re-scoped

None.

## Deviations

- passlib[bcrypt] replaced with direct bcrypt due to passlib incompatibility with bcrypt>=4.1
- Alembic migration written manually (no live DB for autogenerate)
- AppShell extracted from App component to allow useAuth() inside AuthProvider
- AuthNav added as separate component rather than inline in App.tsx

## Known Limitations

- JWT InsecureKeyLengthWarning: default app_secret_key is 31 bytes, production should use 32+ bytes
- 7 pre-existing test_public_api.py failures unrelated to auth
- MomentDetail fetches full queue with limit=500 (pre-existing, not introduced by this slice)

## Follow-ups

- Seed invite code via startup event or CLI command (currently only callable programmatically)
- Run Alembic migration 016 on ub01 production DB before deploying
- Increase app_secret_key length to 32+ bytes for production

## Files Created/Modified

- `backend/models.py` — Added UserRole enum, User model, InviteCode model
- `backend/auth.py` — Created: password hashing (bcrypt), JWT encode/decode, get_current_user dependency, require_role, seed_invite_codes()
- `backend/schemas.py` — Added RegisterRequest, LoginRequest, TokenResponse, UserResponse, UpdateProfileRequest schemas
- `backend/routers/auth.py` — Created: POST /register, POST /login, GET /me, PUT /me endpoints
- `backend/main.py` — Registered auth router
- `backend/requirements.txt` — Added PyJWT, bcrypt dependencies
- `alembic/versions/016_add_users_and_invite_codes.py` — Migration creating users and invite_codes tables
- `backend/tests/conftest.py` — Added auth model imports, invite_code/registered_user/auth_headers fixtures
- `backend/tests/test_auth.py` — Created: 20 integration tests for all auth endpoints
- `frontend/src/context/AuthContext.tsx` — Created: AuthProvider, useAuth hook with login/register/logout/rehydration
- `frontend/src/api/public-client.ts` — Added auth API functions, TypeScript types, auto-inject Authorization header, exported ApiError and AUTH_TOKEN_KEY
- `frontend/src/pages/Login.tsx` — Created: login page with form, error handling, returnTo redirect
- `frontend/src/pages/Login.module.css` — Created: login page styles
- `frontend/src/pages/Register.tsx` — Created: register page with invite code, validation, error handling
- `frontend/src/pages/Register.module.css` — Created: register page styles
- `frontend/src/components/ProtectedRoute.tsx` — Created: auth gate component with returnTo redirect
- `frontend/src/pages/CreatorDashboard.tsx` — Created: dashboard shell with SidebarNav, placeholder cards
- `frontend/src/pages/CreatorDashboard.module.css` — Created: dashboard layout styles
- `frontend/src/pages/CreatorSettings.tsx` — Created: profile edit + password change with SidebarNav
- `frontend/src/pages/CreatorSettings.module.css` — Created: settings page styles
- `frontend/src/App.tsx` — Added AuthProvider wrapper, AppShell extraction, AuthNav, protected routes for /creator/*
- `frontend/src/App.css` — Added auth nav and dashboard CSS custom properties
