{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://cm-workflow.local/schemas/task-handoff-v1.json",
  "title": "CM task implementation handoff",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema_version",
    "task_id",
    "attempt",
    "status",
    "changed_files",
    "verification",
    "evidence",
    "blockers",
    "scope_deviation"
  ],
  "properties": {
    "schema_version": { "const": 1 },
    "task_id": {
      "type": "string",
      "pattern": "^T-[A-Za-z0-9][A-Za-z0-9._-]*$"
    },
    "attempt": { "type": "integer", "minimum": 1, "maximum": 2 },
    "status": {
      "type": "string",
      "enum": ["ready_for_review", "blocked"]
    },
    "changed_files": {
      "type": "array",
      "uniqueItems": true,
      "items": { "type": "string", "minLength": 1 }
    },
    "implementation_sha256": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$"
    },
    "verification": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["command", "status", "evidence"],
        "properties": {
          "command": { "type": "string", "minLength": 1 },
          "status": {
            "type": "string",
            "enum": ["passed", "failed", "blocked", "not_run"]
          },
          "evidence": { "type": "string", "minLength": 1 }
        }
      }
    },
    "evidence": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": { "type": "string", "minLength": 1 }
    },
    "blockers": {
      "type": "array",
      "uniqueItems": true,
      "items": { "type": "string", "minLength": 1 }
    },
    "scope_deviation": {
      "type": "array",
      "uniqueItems": true,
      "items": { "type": "string", "minLength": 1 }
    }
  },
  "allOf": [
    {
      "if": {
        "properties": { "status": { "const": "ready_for_review" } },
        "required": ["status"]
      },
      "then": {
        "properties": {
          "verification": {
            "items": {
              "properties": { "status": { "const": "passed" } }
            }
          },
          "blockers": { "maxItems": 0 },
          "scope_deviation": { "maxItems": 0 }
        }
      }
    },
    {
      "if": {
        "properties": { "status": { "const": "blocked" } },
        "required": ["status"]
      },
      "then": {
        "anyOf": [
          { "properties": { "blockers": { "minItems": 1 } } },
          { "properties": { "scope_deviation": { "minItems": 1 } } }
        ]
      }
    }
  ]
}