CRITICAL BUG FIX:
- Phase boundaries were hardcoded for 31-day cycle, breaking correct
phase calculations for users with different cycle lengths (28, 35, etc.)
- Added getPhaseBoundaries(cycleLength) function in cycle.ts
- Updated getPhase() to accept cycleLength parameter (default 31)
- Updated all callers (API routes, components) to pass cycleLength
- Added 13 new tests for phase boundaries with 28, 31, and 35-day cycles
ICS IMPROVEMENTS:
- Fixed emojis to match calendar.md spec: 🩸🌱🌸🌙🌑
- Added CATEGORIES field for calendar app colors per spec:
MENSTRUAL=Red, FOLLICULAR=Green, OVULATION=Pink,
EARLY_LUTEAL=Yellow, LATE_LUTEAL=Orange
- Added 5 new tests for CATEGORIES
Updated IMPLEMENTATION_PLAN.md with discovered issues and test counts.
825 tests passing (up from 807)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Implements visual feedback for cycle prediction accuracy in ICS calendar feeds:
- Add predictedDate field to PeriodLog type for tracking predicted vs actual dates
- POST /api/cycle/period now calculates and stores predictedDate based on
previous lastPeriodDate + cycleLength, returns daysEarly/daysLate in response
- ICS feed generates "(Predicted)" events when actual period start differs
from predicted, with descriptions like "period arrived 2 days early"
- Calendar route fetches period logs and passes them to ICS generator
This creates an accuracy feedback loop helping users understand their cycle
variability over time per calendar.md spec.
807 tests passing across 43 test files.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Set up Next.js 16 project with TypeScript for a training decision app
that integrates menstrual cycle phases with Garmin biometrics for
Hashimoto's thyroiditis management.
Stack: Next.js 16, React 19, Tailwind/shadcn, PocketBase, Drizzle,
Zod, Resend, Vitest, Biome, Lefthook, Nix dev environment.
Includes:
- 7 page routes (dashboard, login, settings, calendar, history, plan)
- 12 API endpoints (garmin, user, cycle, calendar, overrides, cron)
- Core lib utilities (decision engine, cycle phases, nutrition, ICS)
- Type definitions and component scaffolding
- Python script for Garmin token bootstrapping
- Initial unit tests for cycle utilities
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
