Springa

Training planner and workout tracker with T1D blood glucose management, synced to Intervals.icu.

Built for a Type 1 Diabetic runner targeting the EcoTrail 16km (2026-06-13). Generates structured training plans (pace-based, Ben Parkes–inspired) with three-tier diabetes fueling strategies, uploads them to Intervals.icu, and tracks completed workouts with HR zone breakdowns and stream graphs.

Stack

• Framework: Next.js (App Router)
• Language: TypeScript
• Database: Turso (libSQL/SQLite)
• AI: Anthropic Claude Sonnet (run analysis + coach chat)
• Auth: NextAuth.js (Google OAuth)
• Styling: Tailwind CSS
• Charts: Recharts
• Testing: Vitest + React Testing Library + MSW
• CGM: Strimma via Nightscout API (live glucose data)
• Integration: Intervals.icu API → Garmin Connect → Garmin Forerunner 970

Getting Started

npm install
npm run dev

Open http://localhost:3000.

Tests

npm test              # run all tests
npx vitest run        # same, explicit
npx tsc --noEmit      # type check