Exercise packs

An exercise pack adds a list of exercises to the catalogue. It’s pure JSON — no code, no sandbox — so it installs regardless of Restricted Mode.

The fast path: export from the app

You don’t have to write anything. In the app: Exercises → long-press a custom exercise → select a few → Export as pack. You get a self-contained <name>.logit-pack.json file that anyone can install from Plugins → Add → File.

To publish it in a registry, split it into a manifest + data file (below), or keep it inline.

The pack file

{
  "formatVersion": 1,
  "pluginId": "com.you.my-pack",
  "exercises": [
    {
      "name": "Zercher Squat",
      "primaryMuscles": ["quads"],
      "secondaryMuscles": ["core", "glutes"],
      "exerciseType": "normal"
    },
    {
      "name": "Nordic Hamstring Curl",
      "primaryMuscles": ["hamstrings"],
      "secondaryMuscles": ["calves"],
      "exerciseType": "bodyweight"
    }
  ]
}

• Muscle groups must be from: chest, back, shoulders, biceps, triceps, quads, hamstrings, glutes, calves, core, forearms.
• exerciseType (optional): normal, assisted, or bodyweight.
• Max 500 exercises. In-pack duplicate names are dropped.

The manifest

{
  "id": "com.you.my-pack",
  "family": "exercise-pack",
  "name": "My Pack",
  "description": "A few odd-lift movements.",
  "version": "1.0.0",
  "author": "You",
  "integrity": "sha256-…",
  "distribution": {
    "origin": "url",
    "manifestUrl": "plugins/my-pack/manifest.json",
    "bundleUrl": "plugins/my-pack/exercises.json"
  },
  "capabilities": [
    { "family": "exercise-pack", "exercisePackId": "com.you.my-pack" }
  ]
}

capabilities[0].exercisePackId must equal the manifest id.

What happens on install

Pack exercises appear in the catalogue with namespaced ids (pack:<id>:<slug>). A core or user exercise with the same name always wins. Disabling or uninstalling the pack removes them cleanly. Pack contents are device-local — they are not synced to your account.

Next: publishing.