phaseflow/IMPLEMENTATION_PLAN.md

PhaseFlow Implementation Plan

This file is maintained by Ralph. Run ./ralph-sandbox.sh plan 3 to generate tasks.

Current State Summary

Library Implementation

File	Status	Gap Analysis
cycle.ts	COMPLETE	9 tests covering all functions, production-ready
nutrition.ts	COMPLETE	17 tests covering getNutritionGuidance, getSeedSwitchAlert, phase-specific carb ranges, keto guidance
email.ts	COMPLETE	14 tests covering sendDailyEmail, sendPeriodConfirmationEmail, email formatting, subject lines
ics.ts	COMPLETE	23 tests covering generateIcsFeed (90 days of phase events), ICS format validation, timezone handling
encryption.ts	COMPLETE	14 tests covering AES-256-GCM encrypt/decrypt round-trip, error handling, key validation
decision-engine.ts	COMPLETE	8 priority rules + override handling with getDecisionWithOverrides(), 24 tests
garmin.ts	COMPLETE	33 tests covering fetchGarminData, fetchHrvStatus, fetchBodyBattery, fetchIntensityMinutes, isTokenExpired, daysUntilExpiry, error handling, token validation
pocketbase.ts	COMPLETE	9 tests covering createPocketBaseClient(), isAuthenticated(), getCurrentUser(), loadAuthFromCookies()
auth-middleware.ts	COMPLETE	6 tests covering withAuth() wrapper for API route protection
middleware.ts (Next.js)	COMPLETE	12 tests covering page protection, redirects to login

Missing Infrastructure Files (CONFIRMED NOT EXIST)

• src/lib/auth-middleware.ts - CREATED in P0.2
• src/middleware.ts - CREATED in P0.2

API Routes (15 total)

Route	Status	Notes
GET /api/user	COMPLETE	Returns user profile with withAuth()
PATCH /api/user	COMPLETE	Updates cycleLength, notificationTime, timezone (17 tests)
POST /api/cycle/period	COMPLETE	Logs period start, updates user, creates PeriodLog (8 tests)
GET /api/cycle/current	COMPLETE	Returns cycle day, phase, config, daysUntilNextPhase (10 tests)
GET /api/today	COMPLETE	Returns decision, cycle, biometrics, nutrition (22 tests)
POST /api/overrides	COMPLETE	Adds override to user.activeOverrides (14 tests)
DELETE /api/overrides	COMPLETE	Removes override from user.activeOverrides (14 tests)
POST /api/garmin/tokens	COMPLETE	Stores encrypted Garmin OAuth tokens (15 tests)
DELETE /api/garmin/tokens	COMPLETE	Clears tokens and disconnects Garmin (15 tests)
GET /api/garmin/status	COMPLETE	Returns connection status, expiry, warning level (11 tests)
GET /api/calendar/[userId]/[token].ics	COMPLETE	Token validation, ICS generation, caching headers (10 tests)
POST /api/calendar/regenerate-token	COMPLETE	Generates 32-char token, returns URL (9 tests)
POST /api/cron/garmin-sync	COMPLETE	Syncs Garmin data for all users, creates DailyLogs (22 tests)
POST /api/cron/notifications	COMPLETE	Sends daily emails with timezone matching, DailyLog handling (20 tests)
GET /api/history	COMPLETE	Paginated historical daily logs with date filtering (19 tests)

Pages (7 total)

Page	Status	Notes
Dashboard (/)	COMPLETE	Wired with /api/today, DecisionCard, DataPanel, NutritionPanel, OverrideToggles
Login (/login)	COMPLETE	Email/password form with auth, error handling, loading states
Settings (/settings)	COMPLETE	Form with cycleLength, notificationTime, timezone
Settings/Garmin (/settings/garmin)	Placeholder	Needs token management UI
Calendar (/calendar)	Placeholder	Needs MonthView integration
History (/history)	Placeholder	Needs list/pagination implementation
Plan (/plan)	Placeholder	Needs phase details display

Components

Component	Status	Notes
DecisionCard	COMPLETE	Displays status, icon, reason
DataPanel	COMPLETE	Shows BB, HRV, intensity data
NutritionPanel	COMPLETE	Shows seeds, carbs, keto guidance
OverrideToggles	COMPLETE	Toggle buttons with callbacks
DayCell	COMPLETE	Phase-colored day with click handler
MiniCalendar	Partial (~30%)	Has header only, MISSING: calendar grid
MonthView	Partial (~30%)	Has header only, MISSING: calendar grid + DayCell integration

Test Coverage

Test File	Status
src/lib/cycle.test.ts	EXISTS - 9 tests
src/lib/decision-engine.test.ts	EXISTS - 24 tests (8 algorithmic rules + 16 override scenarios)
src/lib/pocketbase.test.ts	EXISTS - 9 tests (auth helpers, cookie loading)
src/lib/auth-middleware.test.ts	EXISTS - 6 tests (withAuth wrapper, error handling)
src/middleware.test.ts	EXISTS - 12 tests (page protection, public routes, static assets)
src/app/api/user/route.test.ts	EXISTS - 21 tests (GET/PATCH profile, auth, validation, security)
src/app/api/cycle/period/route.test.ts	EXISTS - 8 tests (POST period, auth, validation, date checks)
src/app/api/cycle/current/route.test.ts	EXISTS - 10 tests (GET current cycle, auth, all phases, rollover, custom lengths)
src/app/api/today/route.test.ts	EXISTS - 22 tests (daily snapshot, auth, decision, overrides, phases, nutrition, biometrics)
src/app/api/overrides/route.test.ts	EXISTS - 14 tests (POST/DELETE overrides, auth, validation, type checks)
src/app/login/page.test.tsx	EXISTS - 14 tests (form rendering, auth flow, error handling, validation)
src/app/page.test.tsx	EXISTS - 23 tests (data fetching, component rendering, override toggles, error handling)
src/lib/nutrition.test.ts	EXISTS - 17 tests (seed cycling, carb ranges, keto guidance by phase)
src/lib/email.test.ts	EXISTS - 14 tests (email content, subject lines, formatting)
src/lib/ics.test.ts	EXISTS - 23 tests (ICS format validation, 90-day event generation, timezone handling)
src/lib/encryption.test.ts	EXISTS - 14 tests (encrypt/decrypt round-trip, error handling, key validation)
src/lib/garmin.test.ts	EXISTS - 33 tests (fetchGarminData, fetchHrvStatus, fetchBodyBattery, fetchIntensityMinutes, token expiry, error handling)
src/app/api/garmin/tokens/route.test.ts	EXISTS - 15 tests (POST/DELETE tokens, encryption, validation, auth)
src/app/api/garmin/status/route.test.ts	EXISTS - 11 tests (connection status, expiry, warning levels)
src/app/api/cron/garmin-sync/route.test.ts	EXISTS - 22 tests (auth, user iteration, token handling, Garmin data fetching, DailyLog creation, error handling)
src/app/api/cron/notifications/route.test.ts	EXISTS - 20 tests (timezone matching, DailyLog handling, email sending)
src/app/api/calendar/[userId]/[token].ics/route.test.ts	EXISTS - 10 tests (token validation, ICS generation, caching, error handling)
src/app/api/calendar/regenerate-token/route.test.ts	EXISTS - 9 tests (token generation, URL formatting, auth)
src/app/api/history/route.test.ts	EXISTS - 19 tests (pagination, date filtering, auth, validation)
E2E tests	NONE

Critical Business Rules (from Spec)

1. Override Priority: flare > stress > sleep > pms (must be enforced in order)
2. HRV Unbalanced: ALWAYS forces REST (highest algorithmic priority, non-overridable)
3. Phase Limits: Strictly enforced per phase configuration
4. Token Expiration Warnings: Must send email at 14 days and 7 days before expiry
5. ICS Feed: Generates 90 days of phase events for calendar subscription

---

P0: Critical Blockers

These must be completed first - nothing else works without them.

P0.1: PocketBase Auth Helpers ✅ COMPLETE

• Add authentication utilities to pocketbase.ts
• Files:
  • src/lib/pocketbase.ts - Added createPocketBaseClient(), getCurrentUser(), isAuthenticated(), loadAuthFromCookies()
• Tests:
  • src/lib/pocketbase.test.ts - 9 tests covering auth state management, cookie loading
• Why: Every protected route and page depends on these helpers
• Blocking: P0.2, P0.4, P1.1-P1.7, P2.2-P2.13

P0.2: Auth Middleware for API Routes ✅ COMPLETE

• Create reusable auth middleware for protected API endpoints
• Files:
  • src/lib/auth-middleware.ts - Added withAuth() wrapper for route handlers
  • src/middleware.ts - Added Next.js middleware for page protection
• Tests:
  • src/lib/auth-middleware.test.ts - 6 tests covering unauthorized rejection, user context passing, error handling
  • src/middleware.test.ts - 12 tests covering protected routes, public routes, API routes, static assets
• Why: All API routes except /api/calendar/[userId]/[token].ics and /api/cron/* require auth
• Depends On: P0.1
• Blocking: P0.4, P1.1-P1.5

P0.3: Decision Engine Override Handling ✅ COMPLETE

• Add override priority logic before algorithmic decision
• Files:
  • src/lib/decision-engine.ts - Added getDecisionWithOverrides(data, overrides) function
• Tests:
  • src/lib/decision-engine.test.ts - 24 tests covering all 8 priority rules + override scenarios
• Override Priority (enforced in this order):
  1. flare - Always forces REST
  2. stress - Forces REST
  3. sleep - Forces REST
  4. pms - Forces REST
• Why: Overrides are core to the user experience per spec
• Blocking: P1.4, P1.5

P0.4: GET /api/user Implementation ✅ COMPLETE

• Return authenticated user profile
• Files:
  • src/app/api/user/route.ts - Implemented GET handler with withAuth() wrapper
• Tests:
  • src/app/api/user/route.test.ts - 4 tests covering auth, response shape, sensitive field exclusion
• Response Shape:
  • id, email, garminConnected, cycleLength, lastPeriodDate, notificationTime, timezone, activeOverrides
  • Excludes sensitive fields: garminOauth1Token, garminOauth2Token, calendarToken
• Why: Dashboard and all pages need user context
• Depends On: P0.1, P0.2
• Blocking: P1.7, P2.9, P2.10

---

P1: Core Functionality

Minimum viable product - app can be used for daily decisions.

P1.1: PATCH /api/user Implementation ✅ COMPLETE

• Allow profile updates (cycleLength, notificationTime, timezone)
• Files:
  • src/app/api/user/route.ts - Implemented PATCH handler with validation
• Tests:
  • src/app/api/user/route.test.ts - 17 tests covering field validation, persistence, security
• Validation Rules:
  • cycleLength: number, range 21-45 days
  • notificationTime: string, HH:MM format (24-hour)
  • timezone: non-empty string
• Security: Ignores attempts to update non-updatable fields (email, tokens)
• Why: Users need to configure their cycle and preferences
• Depends On: P0.1, P0.2

P1.2: POST /api/cycle/period Implementation ✅ COMPLETE

• Log period start date, update user record, create PeriodLog
• Files:
  • src/app/api/cycle/period/route.ts - Implemented POST handler with validation
• Tests:
  • src/app/api/cycle/period/route.test.ts - 8 tests covering auth, date validation, user update, PeriodLog creation
• Why: Cycle tracking is the foundation of all recommendations
• Depends On: P0.1, P0.2

P1.3: GET /api/cycle/current Implementation ✅ COMPLETE

• Return current cycle day, phase, and phase config
• Files:
  • src/app/api/cycle/current/route.ts - Implemented GET using cycle.ts utilities with withAuth() wrapper
• Tests:
  • src/app/api/cycle/current/route.test.ts - 10 tests covering auth, validation, all phases, cycle rollover, custom cycle lengths
• Response Shape:
  • cycleDay, phase, phaseConfig, daysUntilNextPhase, cycleLength
• Why: Dashboard needs this for display
• Depends On: P0.1, P0.2, P1.2

P1.4: GET /api/today Implementation ✅ COMPLETE

• Return complete daily snapshot with decision, biometrics, nutrition
• Files:
  • src/app/api/today/route.ts - Implemented GET with withAuth() wrapper, aggregates cycle, biometrics, and nutrition
• Tests:
  • src/app/api/today/route.test.ts - 22 tests covering auth, validation, decision calculation, overrides, phases, nutrition
• Response Shape:
  • decision (status, reason, icon), cycleDay, phase, phaseConfig, daysUntilNextPhase, cycleLength
  • biometrics (hrvStatus, bodyBatteryCurrent, bodyBatteryYesterdayLow, weekIntensityMinutes, phaseLimit)
  • nutrition (seeds, carbRange, ketoGuidance)
• Fallback Behavior: When no DailyLog exists (Garmin not synced), returns defaults: hrvStatus="Unknown", BB=100, weekIntensity=0
• Why: This is THE core API for the dashboard
• Depends On: P0.1, P0.2, P0.3, P1.3

P1.5: POST/DELETE /api/overrides Implementation ✅ COMPLETE

• Toggle override flags on user record
• Files:
  • src/app/api/overrides/route.ts - Implemented POST (add) and DELETE (remove) handlers with validation
• Tests:
  • src/app/api/overrides/route.test.ts - 14 tests covering auth, override types, persistence, validation, edge cases
• Override Types: flare, stress, sleep, pms
• POST Response: Returns updated user with new override added to activeOverrides array
• DELETE Response: Returns updated user with override removed from activeOverrides array
• Validation: Rejects invalid override types, duplicates on POST, missing overrides on DELETE
• Why: Emergency overrides are critical for flare days
• Depends On: P0.1, P0.2, P0.3

P1.6: Login Page Implementation ✅ COMPLETE

• Functional login form with PocketBase auth
• Files:
  • src/app/login/page.tsx - Client component with email/password form, error handling, loading states, redirect
• Tests:
  • src/app/login/page.test.tsx - 14 tests covering rendering, form submission, auth flow, error handling, validation
• Infrastructure Added:
  • src/test-setup.ts - Global test setup with @testing-library/jest-dom and cleanup
  • Updated vitest.config.ts to include setupFiles
• Why: Users need to authenticate to use the app
• Depends On: P0.1

P1.7: Dashboard Page Implementation ✅ COMPLETE

• Wire up dashboard with real data from /api/today
• Integrate DecisionCard, DataPanel, NutritionPanel, OverrideToggles
• Implement override toggle functionality with optimistic updates
• Add error handling and loading states
• Files:
  • src/app/page.tsx - Client component fetching /api/today, rendering all dashboard components
• Tests:
  • src/app/page.test.tsx - 23 tests covering data fetching, component rendering, override toggles, error handling
• Features Implemented:
  • Real-time decision display with cycle phase information
  • Biometrics panel (HRV, Body Battery, Intensity Minutes)
  • Nutrition guidance panel (seeds, carbs, keto)
  • Override toggles with optimistic UI updates
  • Error boundaries and loading states
• Why: This is the main user interface
• Depends On: P0.4, P1.3, P1.4, P1.5

---

P2: Important Features

Full feature set for production use.

P2.1: Garmin Data Fetching Functions ✅ COMPLETE

• Add specific fetchers for HRV, Body Battery, Intensity Minutes
• Files:
  • src/lib/garmin.ts - Added fetchHrvStatus(), fetchBodyBattery(), fetchIntensityMinutes()
• Tests:
  • src/lib/garmin.test.ts - 33 tests covering API calls, response parsing, error handling (increased from 14 tests)
• Functions Implemented:
  • fetchHrvStatus() - Fetches HRV status (balanced/unbalanced) from Garmin
  • fetchBodyBattery() - Fetches current and yesterday's low body battery values
  • fetchIntensityMinutes() - Fetches weekly moderate + vigorous intensity minutes
• Why: Real biometric data is required for accurate decisions

P2.2: POST/DELETE /api/garmin/tokens Implementation ✅ COMPLETE

• Store encrypted Garmin OAuth tokens
• Files:
  • src/app/api/garmin/tokens/route.ts - POST/DELETE handlers with encryption, validation
• Tests:
  • src/app/api/garmin/tokens/route.test.ts - 15 tests covering encryption, validation, storage, auth, deletion
• Features Implemented:
  • POST: Accepts oauth1, oauth2, expires_at; encrypts tokens; stores in user record
  • DELETE: Clears tokens and sets garminConnected to false
  • Validation for required fields and types
  • Returns daysUntilExpiry in POST response
• Why: Users need to connect their Garmin accounts
• Depends On: P0.1, P0.2

P2.3: GET /api/garmin/status Implementation ✅ COMPLETE

• Return Garmin connection status and days until expiry
• Files:
  • src/app/api/garmin/status/route.ts - GET handler with expiry calculation
• Tests:
  • src/app/api/garmin/status/route.test.ts - 11 tests covering connected/disconnected states, expiry calc, warning levels
• Response Shape:
  • connected - Boolean indicating if tokens exist
  • daysUntilExpiry - Days until token expires (null if not connected)
  • expired - Boolean indicating if tokens have expired
  • warningLevel - "critical" (≤7 days), "warning" (8-14 days), or null
• Why: Users need visibility into their Garmin connection
• Depends On: P0.1, P0.2, P2.1

P2.4: POST /api/cron/garmin-sync Implementation ✅ COMPLETE

• Daily sync of all Garmin data for all users
• Files:
  • src/app/api/cron/garmin-sync/route.ts - Iterates users, fetches data, stores DailyLog
• Tests:
  • src/app/api/cron/garmin-sync/route.test.ts - 22 tests covering auth, user iteration, token handling, Garmin data fetching, DailyLog creation, error handling
• Features Implemented:
  • Fetches all users with garminConnected=true
  • Skips users with expired tokens
  • Decrypts OAuth2 tokens and fetches HRV, Body Battery, Intensity Minutes
  • Calculates cycle day, phase, phase limit, remaining minutes
  • Computes training decision using decision engine
  • Creates DailyLog entries for each user
  • Returns sync summary (usersProcessed, errors, skippedExpired, timestamp)
• Why: Automated data sync is required for morning notifications
• Depends On: P2.1, P2.2

P2.5: POST /api/cron/notifications Implementation ✅ COMPLETE

• Send daily email notifications at user's preferred time
• Files:
  • src/app/api/cron/notifications/route.ts - Timezone-aware user matching, DailyLog fallback, email sending
• Tests:
  • src/app/api/cron/notifications/route.test.ts - 20 tests covering timezone matching, DailyLog handling, email sending
• Features Implemented:
  • Timezone-aware notification matching (finds users whose notificationTime matches current hour in their timezone)
  • DailyLog-based notifications with fallback to real-time calculation when DailyLog missing
  • Duplicate prevention (only sends once per user per hour)
  • Nutrition guidance integration (seeds, carbs, keto)
  • CRON_SECRET authentication
  • Returns summary with emailsSent count and timestamp
• Why: Email notifications are a key feature per spec
• Depends On: P2.4

P2.6: GET /api/calendar/[userId]/[token].ics Implementation ✅ COMPLETE

• Return ICS feed for calendar subscription
• Files:
  • src/app/api/calendar/[userId]/[token].ics/route.ts - Validates token, generates ICS with 90 days of phase events
• Tests:
  • src/app/api/calendar/[userId]/[token].ics/route.test.ts - 10 tests covering token validation, ICS generation, caching headers, error handling
• Features Implemented:
  • Token-based authentication (no session required)
  • Validates calendar token against user record
  • Generates 90 days of phase events using generateIcsFeed()
  • Returns proper Content-Type header (text/calendar; charset=utf-8)
  • Caching headers for calendar client optimization
  • 404 for non-existent users, 401 for invalid tokens
• Why: Calendar integration for external apps

P2.7: POST /api/calendar/regenerate-token Implementation ✅ COMPLETE

• Generate new calendar token
• Files:
  • src/app/api/calendar/regenerate-token/route.ts - Creates random 32-char token, updates user
• Tests:
  • src/app/api/calendar/regenerate-token/route.test.ts - 9 tests covering token generation, URL formatting, auth
• Features Implemented:
  • Requires authentication via withAuth() middleware
  • Generates cryptographically secure 32-character hex token
  • Updates user's calendarToken field in database
  • Returns new token and formatted calendar URL
  • Old tokens immediately invalidated
• Why: Security feature for calendar URLs
• Depends On: P0.1, P0.2

P2.8: GET /api/history Implementation ✅ COMPLETE

• Return paginated historical daily logs
• Files:
  • src/app/api/history/route.ts - Query DailyLog with pagination, date filtering, validation
• Tests:
  • src/app/api/history/route.test.ts - 19 tests covering pagination, date filtering, auth, validation
• Features Implemented:
  • Pagination with page/limit parameters (default: page=1, limit=20)
  • Date filtering with startDate/endDate query params (YYYY-MM-DD format)
  • Validation for all parameters with descriptive error messages
  • Sort by date descending (most recent first)
  • Returns items, total, page, limit, totalPages, hasMore
• Why: Users want to see their training history
• Depends On: P0.1, P0.2

P2.9: Settings Page Implementation ✅ COMPLETE

• User profile management UI
• Files:
  • src/app/settings/page.tsx - Form for cycleLength, notificationTime, timezone with validation, loading states, error handling
• Tests:
  • src/app/settings/page.test.tsx - 24 tests covering rendering, data loading, form submission, validation, error handling
• Why: Users need to configure their preferences
• Depends On: P0.4, P1.1

P2.10: Settings/Garmin Page Implementation

• Garmin connection management UI
• Files:
  • src/app/settings/garmin/page.tsx - Token input form, connection status, disconnect button
• Tests:
  • E2E test: connect flow, disconnect flow
• Why: Users need to manage their Garmin connection
• Depends On: P0.4, P2.2, P2.3

P2.11: Calendar Page Implementation

• In-app calendar with phase visualization
• Files:
  • src/app/calendar/page.tsx - Month view with navigation
  • src/components/calendar/month-view.tsx - Complete calendar grid using DayCell
• Tests:
  • E2E test: navigation works, phases displayed correctly
• Why: Planning ahead is a key user need
• Depends On: P2.6
• Note: DayCell is COMPLETE, MonthView needs grid implementation (~70% remaining)

P2.12: History Page Implementation

• View past training decisions and data
• Files:
  • src/app/history/page.tsx - List view of DailyLogs with pagination
• Tests:
  • E2E test: history loads, pagination works
• Why: Users want to review their training history
• Depends On: P2.8

P2.13: Plan Page Implementation

• Phase-specific training plan view
• Files:
  • src/app/plan/page.tsx - Current phase details, upcoming phases, limits
• Tests:
  • E2E test: correct phase info displayed
• Why: Users want detailed training guidance
• Depends On: P0.4, P1.3

P2.14: Mini Calendar Component

• Dashboard overview calendar
• Files:
  • src/components/dashboard/mini-calendar.tsx - Complete calendar grid with phase colors
• Tests:
  • Component test: renders current month, highlights today
• Why: Quick visual reference on dashboard
• Note: Component exists with header only, needs calendar grid (~70% remaining)

---

P3: Polish and Quality

Testing, error handling, and refinements.

P3.1: Decision Engine Tests ✅ COMPLETE

• Comprehensive unit tests for all decision paths
• Files:
  • src/lib/decision-engine.test.ts - All 8 priority rules, override combinations (24 tests)
• Test Cases Covered:
  • HRV Unbalanced always forces REST (highest algorithmic priority)
  • Override priority: flare > stress > sleep > pms
  • Phase limits strictly enforced
  • All override bypass and fallthrough scenarios
• Why: Critical logic is now fully tested

P3.2: Nutrition Tests ✅ COMPLETE

• Unit tests for nutrition guidance
• Files:
  • src/lib/nutrition.test.ts - 17 tests covering seed cycling, carb ranges, keto guidance by phase
• Test Cases Covered:
  • Seed cycling recommendations by phase (flax/pumpkin vs sunflower/sesame)
  • Carb range calculations per phase
  • Keto guidance by cycle day
  • Edge cases and phase transitions
• Why: Nutrition advice accuracy is now fully tested

P3.3: Email Tests ✅ COMPLETE

• Unit tests for email composition
• Files:
  • src/lib/email.test.ts - 14 tests covering email content, subject lines, formatting
• Test Cases Covered:
  • Daily email composition with decision data
  • Period confirmation email content
  • Subject line formatting
  • HTML email structure
• Why: Email formatting correctness is now fully tested

P3.4: ICS Tests ✅ COMPLETE

• Unit tests for calendar generation
• Files:
  • src/lib/ics.test.ts - 23 tests covering ICS format validation, 90-day event generation, timezone handling
• Test Cases Covered:
  • ICS feed generation with 90 days of phase events
  • RFC 5545 format compliance
  • Timezone handling (UTC conversion)
  • Event boundaries and phase transitions
• Why: Calendar integration compatibility is now fully tested

P3.5: Encryption Tests ✅ COMPLETE

• Unit tests for encrypt/decrypt round-trip
• Files:
  • src/lib/encryption.test.ts - 14 tests covering AES-256-GCM round-trip, error handling, key validation
• Test Cases Covered:
  • Encrypt/decrypt round-trip verification
  • Key validation and error handling
  • IV generation uniqueness
  • Malformed data handling
• Why: Token security is now fully tested

P3.6: Garmin Tests ✅ COMPLETE

• Unit tests for Garmin API interactions
• Files:
  • src/lib/garmin.test.ts - 33 tests covering API calls, error handling, token expiry (expanded in P2.1)
• Test Cases Covered:
  • fetchGarminData, fetchHrvStatus, fetchBodyBattery, fetchIntensityMinutes HTTP calls and response parsing
  • isTokenExpired logic with various expiry dates
  • daysUntilExpiry calculations
  • Error handling for invalid tokens and network failures
  • Response parsing for biometric data structures
• Why: External API integration robustness is now fully tested

P3.7: Error Handling Improvements

• Add consistent error responses across all API routes
• Files:
  • All route files - Standardize error format, add logging
• Why: Better debugging and user experience

P3.8: Loading States

• Add loading indicators to all pages
• Files:
  • All page files - Add loading.tsx or Suspense boundaries
• Why: Better perceived performance

P3.9: Token Expiration Warnings

• Email warnings at 14 and 7 days before Garmin token expiry
• Files:
  • src/lib/email.ts - Add sendTokenExpirationWarning()
  • src/app/api/cron/garmin-sync/route.ts - Check expiry, trigger warnings
• Tests:
  • Test warning triggers at exactly 14 days and 7 days
• Why: Users need time to refresh tokens (per spec requirement)

P3.10: E2E Test Suite

• Comprehensive end-to-end tests
• Files:
  • tests/e2e/*.spec.ts - Full user flows
• Test Scenarios:
  • Login flow
  • Period logging and phase calculation
  • Override toggle functionality
  • Settings update flow
  • Garmin connection flow
  • Calendar subscription
• Why: Confidence in production deployment

---

Implementation Order

P0.1 PocketBase Auth ──┬──> P0.2 Auth Middleware ──> P0.4 GET /api/user
                       │
P0.3 Override Logic ───┴──> P1.4 GET /api/today ──> P1.7 Dashboard

P1.1 PATCH /api/user ────> P2.9 Settings Page
P1.2 POST period ────────> P1.3 GET current ────> P1.7 Dashboard
P1.5 Overrides API ──────> P1.7 Dashboard
P1.6 Login Page

P2.1 Garmin fetchers ──> P2.2 Garmin tokens ──> P2.4 Cron sync ──> P2.5 Notifications
                                                         │
                                                         └──> P3.9 Token Warnings
P2.3 Garmin status ────> P2.10 Garmin settings

P2.6 ICS endpoint ─────> P2.11 Calendar page
P2.7 Regen token

P2.8 History API ──────> P2.12 History page
P2.13 Plan page
P2.14 Mini calendar

Dependency Summary

Task	Blocked By	Blocks
P0.1	-	P0.2, P0.4, P1.1-P1.6, P2.2-P2.3, P2.7-P2.8
P0.2	P0.1	P0.4, P1.1-P1.5, P2.2-P2.3, P2.7-P2.8
P0.3	-	P1.4, P1.5
P0.4	P0.1, P0.2	P1.7, P2.9, P2.10, P2.13

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Completed

Library

• cycle.ts - Complete with 9 tests (getCycleDay, getPhase, getPhaseConfig, getPhaseLimit)
• decision-engine.ts - Complete with 24 tests (getTrainingDecision + getDecisionWithOverrides)
• pocketbase.ts - Complete with 9 tests (createPocketBaseClient, isAuthenticated, getCurrentUser, loadAuthFromCookies)
• nutrition.ts - Complete with 17 tests (getNutritionGuidance, getSeedSwitchAlert, phase-specific carb ranges, keto guidance) (P3.2)
• email.ts - Complete with 14 tests (sendDailyEmail, sendPeriodConfirmationEmail, email formatting) (P3.3)
• ics.ts - Complete with 23 tests (generateIcsFeed, ICS format validation, 90-day event generation) (P3.4)
• encryption.ts - Complete with 14 tests (AES-256-GCM encrypt/decrypt, round-trip validation, error handling) (P3.5)
• garmin.ts - Complete with 33 tests (fetchGarminData, fetchHrvStatus, fetchBodyBattery, fetchIntensityMinutes, isTokenExpired, daysUntilExpiry, error handling) (P2.1, P3.6)

Components

• DecisionCard - Displays decision status, icon, and reason
• DataPanel - Shows body battery, HRV, intensity data
• NutritionPanel - Shows seeds, carbs, keto guidance
• OverrideToggles - Toggle buttons for flare/stress/sleep/pms
• DayCell - Phase-colored calendar day cell with click handler

API Routes

• GET /api/user - Returns authenticated user profile, 4 tests (P0.4)
• PATCH /api/user - Updates user profile (cycleLength, notificationTime, timezone), 17 tests (P1.1)
• POST /api/cycle/period - Logs period start date, updates user, creates PeriodLog, 8 tests (P1.2)
• GET /api/cycle/current - Returns cycle day, phase, phaseConfig, daysUntilNextPhase, cycleLength, 10 tests (P1.3)
• GET /api/today - Returns complete daily snapshot with decision, biometrics, nutrition, 22 tests (P1.4)
• POST /api/overrides - Adds override to user.activeOverrides array, 14 tests (P1.5)
• DELETE /api/overrides - Removes override from user.activeOverrides array, 14 tests (P1.5)
• POST /api/garmin/tokens - Stores encrypted Garmin OAuth tokens, 15 tests (P2.2)
• DELETE /api/garmin/tokens - Clears tokens and disconnects Garmin, 15 tests (P2.2)
• GET /api/garmin/status - Returns connection status, expiry, warning level, 11 tests (P2.3)
• POST /api/cron/garmin-sync - Daily sync of Garmin data for all connected users, creates DailyLogs, 22 tests (P2.4)
• POST /api/cron/notifications - Sends daily email notifications with timezone matching, DailyLog handling, nutrition guidance, 20 tests (P2.5)
• GET /api/calendar/[userId]/[token].ics - Returns ICS feed with 90-day phase events, token validation, caching headers, 10 tests (P2.6)
• POST /api/calendar/regenerate-token - Generates new 32-char calendar token, returns URL, 9 tests (P2.7)
• GET /api/history - Paginated historical daily logs with date filtering, validation, 19 tests (P2.8)

Pages

• Login Page - Email/password form with PocketBase auth, error handling, loading states, redirect, 14 tests (P1.6)
• Dashboard Page - Complete daily interface with /api/today integration, DecisionCard, DataPanel, NutritionPanel, OverrideToggles, 23 tests (P1.7)
• Settings Page - Form for cycleLength, notificationTime, timezone with validation, loading states, error handling, 24 tests (P2.9)

Test Infrastructure

• test-setup.ts - Global test setup with @testing-library/jest-dom matchers and cleanup

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Discovered Issues

Bugs and inconsistencies found during implementation

• src/lib/auth-middleware.ts does not exist - CREATED in P0.2
• src/middleware.ts does not exist - CREATED in P0.2
• ~garmin.ts is only 30% complete - missing specific biometric fetchers - FIXED in P2.1 (added fetchHrvStatus, fetchBodyBattery, fetchIntensityMinutes)
• pocketbase.ts missing all auth helper functions - FIXED in P0.1
• src/app/api/today/route.ts type error with null body battery values - FIXED (added null coalescing)

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Notes

1. TDD Approach: Each implementation task should follow TDD - write failing tests first, then implement
2. Auth First: P0 items unlock all other work; prioritize ruthlessly
3. Incremental Delivery: P1 completion = usable app without Garmin (manual data entry fallback)
4. P2 Completion: Full feature set with automation
5. P3: Quality and polish for production confidence
6. Component Reuse: Dashboard components are complete and can be used directly in P1.7
7. HRV Rule: HRV Unbalanced status ALWAYS forces REST - this is the highest algorithmic priority and cannot be overridden by manual toggles
8. Override Order: When multiple overrides are active, apply in order: flare > stress > sleep > pms
9. Token Warnings: Per spec, warnings must be sent at exactly 14 days and 7 days before expiry