{
  "schema": "wtfp.action/v1",
  "id": "checkpoint",
  "title": "Manage checkpoints",
  "description": "Save, list, or restore an exact portable paper-state checkpoint.",
  "alias": "wtfp:checkpoint",
  "surface": {
    "kind": "skill",
    "skill": "wtfp-manage-project"
  },
  "workflow": "wtfp://workflows/checkpoint",
  "requirements": {
    "capabilities": [
      "filesystem.read",
      "filesystem.write",
      "user.interaction"
    ],
    "conditions": [
      "Portable project state has been initialized"
    ]
  },
  "reads": [
    "project://manifest",
    "project://config",
    "project://state",
    "project://decisions",
    "project://structure/outline",
    "project://sections/{section}",
    "project://sources/{source}",
    "project://evidence/{evidence}",
    "project://validations/{validation}",
    "project://paper/{artifact}"
  ],
  "produces": [
    {
      "uri": "project://checkpoints/{checkpoint}",
      "mode": "create"
    },
    {
      "uri": "project://archives/checkpoints/{checkpoint}",
      "mode": "create"
    },
    {
      "uri": "project://archives/recovery/{artifact}",
      "mode": "create"
    },
    {
      "uri": "project://manifest",
      "mode": "update"
    },
    {
      "uri": "project://state",
      "mode": "update"
    }
  ],
  "delegation": [],
  "tools": [],
  "effects": [
    {
      "id": "filesystem.create",
      "scope": "project://checkpoints/{checkpoint}, project://archives/checkpoints/{checkpoint}, project://archives/recovery/{artifact}"
    },
    {
      "id": "filesystem.read",
      "scope": "declared project records and authored artifacts selected for the snapshot"
    },
    {
      "id": "filesystem.write",
      "scope": "project://manifest, project://state, and only snapshot-declared resources during an authorized restore"
    },
    {
      "id": "user.gate",
      "scope": "checkpoint restore and replacement"
    }
  ]
}