workouts/README.md

# Workouts

A workout tracking app for iPhone and Apple Watch. Build workout splits, run
sessions, and track your progress — with your data stored as plain JSON files in
your own iCloud Drive.

## Key Features

- **Workout splits** — organize exercises into reusable routines with custom
  colors, icons, and an activity type (strength, HIIT, cardio, …). Built-in
  starter splits (Upper Body / Core / Lower Body
  machine routines, plus an equipment-free **Bodyweight Core** circuit with its
  own warm-up) appear automatically on first launch; editing one makes it your
  own copy, and deleted starters can be restored from Settings.
- **Exercise library** — a bundled library of 47 exercises to populate your
  splits, authored in `Exercise Library/` with per-exercise setup, cues,
  mistakes, progressions, and an anatomically-rigged 3D stick-figure visual
  system — covering every common movement pattern and gym station (see the
  library's `COVERAGE.md`): the full machine circuit, the barbell and dumbbell
  free-weight canon (deadlifts, squats, benches, rows, curls, raises), the
  cable staples, and the bodyweight staples (push-ups, pull-ups, dips,
  lunges, and the floor core set).
- **Run a workout** — start a session from a split, then tap an exercise to run it
  as a paged flow: a **Ready?** lead-in, count-up work phases, count-down rests, and
  a **Finish** page — mirroring the Apple Watch. Swipe a row to mark it complete, or
  swipe to edit its plan (sets/reps/weight or duration) and notes. End a workout early
  from the **⋯** menu — **Save** keeps your progress (remaining exercises are marked
  skipped) or **Discard** removes it. Mid-workout, add any exercise from the full
  library — its plan is seeded from your most recent session with it, or from the
  library's authored defaults.
- **Live Activity** — the running workout lives on the Lock Screen and in the
  Dynamic Island: current exercise, set count, phase, and a live rest countdown,
  updating through every transition without unlocking the phone.
- **Animated form guide** — every library exercise shows a looping stick-figure
  demonstration on the run screen's bottom half, posed by real joint angles on an
  anatomical 3D skeleton (complete with feet) and rendered live from the Exercise
  Library's rig data with the working limbs highlighted — the camera slowly
  orbits every exercise while it moves, machine equipment (seats, bars, cables,
  roller pads) has world-space 3D form that turns with the figure, and face-on
  machines show true hip abduction and torso rotation.
- **Machine comfort settings** — machine-based exercises remember your setup
  (seat height, back-rest position, pin position, …), shown on the workout
  screen and editable mid-workout; changes save back to the split for next time.
- **Progress tracking** — weight-progression charts per exercise across past
  sessions.
- **Apple Watch companion** — starting a workout on the iPhone launches the watch
  app straight into it. The watch lists your in-progress workouts; pick one, pick an
  exercise, and run it as a paged flow: a **Ready?** lead-in, count-up work phases,
  count-down rests with final-three-second haptics and auto-advance, and a **Finish**
  page with **One More** and a **Done** that auto-completes after a countdown. A
  phase-dot row (purple work, teal rest) tracks progress. Rest time and the
  auto-finish countdown are configurable; changes sync back to the phone.
- **Two-way live run** — prop your iPhone up during an Apple Watch workout and it runs
  the same Ready → work/rest → Finish flow with live timers, in step with the watch. It's
  bidirectional: drive from either device — swipe ahead, finish a set, add one — and the
  other follows. Only *human* transitions are sent; automatic ones (a rest timer ending)
  advance both devices independently off shared start times, so they never fight.
- **Watch face complication** — a launcher complication you can place on any Apple
  Watch face; tap it to open the app. Available in the circular, corner, inline, and
  rectangular accessory slots.
- **Apple Health & Activity rings** — workouts recorded on the Apple Watch (heart
  rate + active energy) are saved to Apple Health and credit your Move and Exercise
  rings. See live heart rate and calories on the watch, and a post-workout summary
  (duration, calories, avg/max heart rate, heart-rate zones with a legend, total
  volume) you can revisit on any past workout. Weights display in your choice of
  pounds or kilograms.
- **iCloud Drive sync** — your data lives as human-readable JSON in your iCloud
  Drive, synced across devices and visible in the Files app. iCloud is required.
- **Backups** — create point-in-time snapshots of all your data from Settings,
  keep several with retention controls, and restore one with a tap (backup files
  open straight into the app).
- **Diagnostics** — a Settings screen that shows iCloud account and container
  status, per-document download/eviction state, schema compatibility, and network
  readiness — with a one-tap copyable report.

## Architecture

iCloud Drive JSON documents are the **sole source of truth**; a local SwiftData
store is a rebuildable read-through cache populated exclusively by an
`NSMetadataQuery` observer (one-way flow: files → observer → cache). The phone is
the only device that touches iCloud Drive; the Apple Watch is a thin remote that
round-trips workout changes through the phone via WatchConnectivity.

See `REQUIREMENTS.md` for the data model and `CLAUDE.md` for project guidance.

## Building

The Xcode project is generated with [XcodeGen](https://github.com/yonaskolb/XcodeGen):

```sh
xcodegen generate
open Workouts.xcodeproj
```

Requires Xcode 26 (iOS 26 / watchOS 26, Swift 6).