{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schemas.kxm.dev/roadmap-state.schema.json",
  "title": "KXM roadmap state",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema", "updated", "goal", "phases"],
  "properties": {
    "schema": { "const": "kxm.roadmap.v1" },
    "updated": { "type": "string", "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$" },
    "goal": { "type": "string", "minLength": 1 },
    "constraints": {
      "type": "array",
      "items": { "type": "string" }
    },
    "contacts": {
      "type": "array",
      "items": { "$ref": "#/$defs/contact" }
    },
    "contacts_comment": { "type": "string" },
    "history": {
      "type": "array",
      "description": "Oldest first. The generator keeps the newest 12 lines and drops the older ones (history_over_cap). That prune is not a schema refusal.",
      "items": { "$ref": "#/$defs/historyLine" }
    },
    "architecture": { "$ref": "#/$defs/architecture" },
    "improvements": {
      "type": "array",
      "items": { "type": "string" }
    },
    "phases": {
      "type": "array",
      "items": { "$ref": "#/$defs/phase" }
    }
  },
  "$defs": {
    "date": { "type": "string", "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$" },
    "historyLine": {
      "type": "object",
      "additionalProperties": false,
      "required": ["date", "line"],
      "properties": {
        "date": { "$ref": "#/$defs/date" },
        "line": { "type": "string", "minLength": 1, "maxLength": 240 }
      }
    },
    "contact": {
      "type": "object",
      "additionalProperties": false,
      "required": ["role", "confirmed"],
      "properties": {
        "role": { "type": "string", "minLength": 1 },
        "name": { "type": "string", "minLength": 1 },
        "confirmed": { "$ref": "#/$defs/date" }
      }
    },
    "architecture": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "verified": {
          "anyOf": [
            { "type": "null" },
            { "$ref": "#/$defs/date" }
          ]
        },
        "docs": {
          "type": "array",
          "items": { "type": "string" }
        },
        "drift": {
          "type": "array",
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": ["claim", "page", "status"],
            "properties": {
              "claim": { "type": "string" },
              "page": { "type": "string" },
              "status": { "type": "string" }
            }
          }
        }
      }
    },
    "phase": {
      "type": "object",
      "additionalProperties": false,
      "required": ["id", "slug", "title", "goal", "source", "tasks"],
      "properties": {
        "id": { "type": "string", "minLength": 1 },
        "slug": { "type": "string", "minLength": 1 },
        "title": { "type": "string", "minLength": 1 },
        "goal": { "type": "string", "minLength": 1 },
        "source": { "type": "string", "minLength": 1 },
        "priority": { "const": "later" },
        "horizon": {
          "description": "Derived by the generator from phase order and priority (next, soon, or later). Not hand-set. A stored value is ignored.",
          "enum": ["next", "soon", "later"]
        },
        "blockers": {
          "type": "array",
          "items": { "type": "string" }
        },
        "questions": {
          "type": "array",
          "items": { "type": "string" }
        },
        "tasks": {
          "type": "array",
          "items": { "$ref": "#/$defs/task" }
        }
      }
    },
    "task": {
      "type": "object",
      "additionalProperties": false,
      "required": ["id", "title", "status"],
      "properties": {
        "id": { "type": "string", "minLength": 1 },
        "title": { "type": "string", "minLength": 1 },
        "status": { "enum": ["open", "done"] },
        "evidence": { "type": "string" },
        "planSection": { "type": "string", "minLength": 1 },
        "doneCriterion": { "type": "string", "minLength": 1 },
        "evidenceNeeded": { "type": "string", "minLength": 1 },
        "template": {
          "enum": [
            "feature",
            "research",
            "bug-fix",
            "architecture",
            "adr",
            "test-plan",
            "test-report",
            "review",
            "handoff",
            "runbook",
            "postmortem",
            "none"
          ]
        },
        "detail": { "enum": ["brief", "scoped", "ready"] }
      }
    }
  }
}