{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://harness-forge.dev/schemas/runtime/worktree-plan.schema.json",
  "title": "Parallel execution plan",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "planId",
    "featureId",
    "strategy",
    "rootTask",
    "shards",
    "dependencies",
    "sharedRiskPaths",
    "expectedArtifacts",
    "validationGates",
    "mergeCriteria"
  ],
  "properties": {
    "planId": { "type": "string" },
    "featureId": { "type": "string" },
    "strategy": { "type": "string" },
    "rootTask": { "type": "string" },
    "shards": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["shardId", "taskIds"],
        "properties": {
          "shardId": { "type": "string" },
          "taskIds": {
            "type": "array",
            "items": { "type": "string" }
          },
          "worktreePath": { "type": "string" },
          "risk": { "type": "string" }
        }
      }
    },
    "dependencies": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["before", "after"],
        "properties": {
          "before": { "type": "string" },
          "after": { "type": "string" }
        }
      }
    },
    "sharedRiskPaths": {
      "type": "array",
      "items": { "type": "string" }
    },
    "expectedArtifacts": {
      "type": "array",
      "items": { "type": "string" }
    },
    "validationGates": {
      "type": "array",
      "items": { "type": "string" }
    },
    "mergeCriteria": {
      "type": "array",
      "items": { "type": "string" }
    },
    "rollbackPlan": { "type": "string" },
    "fallbackToSingleThreadReason": { "type": ["string", "null"] }
  }
}