{
  "type": "object",
  "properties": {
    "schema_version": {
      "type": "number",
      "const": 1,
      "description": "Schema version of the Replay block itself. Bump on any breaking change to field shape; consumers should refuse to parse newer majors than they understand."
    },
    "kind": {
      "type": "string",
      "enum": [
        "eval-live",
        "critique",
        "eval-image"
      ],
      "description": "Which entry point produced the run. Discriminator for verify-replay so it can apply per-kind interpretation rules (e.g. brief is always null on critique runs)."
    },
    "ahd_version": {
      "type": "string",
      "minLength": 1,
      "description": "Framework version that produced the run, as reported by the package manifest at invocation time (or AHD_VERSION env override)."
    },
    "ahd_commit": {
      "type": [
        "string",
        "null"
      ],
      "description": "Full git SHA the framework was built from. Null when running outside a git repo (npm-installed package, distribution build)."
    },
    "git_dirty": {
      "type": [
        "boolean",
        "null"
      ],
      "description": "True if the working tree had uncommitted changes at run time. Null when ahd_commit is null. Dirty + a SHA together mean the SHA is not the actual run state."
    },
    "node_version": {
      "type": "string",
      "minLength": 1,
      "description": "process.version at invocation time."
    },
    "platform": {
      "type": "string",
      "minLength": 1,
      "description": "`${process.platform}-${process.arch}` at invocation time."
    },
    "invoked_at": {
      "type": "string",
      "format": "date-time"
    },
    "argv": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Full process.argv at invocation time, as a list. Replay tooling reconstructs the shell command from this; a single joined string would lose quoting."
    },
    "token": {
      "type": "object",
      "properties": {
        "path": {
          "type": "string",
          "minLength": 1
        },
        "hash": {
          "type": "string",
          "pattern": "^sha256:[a-f0-9]{64}$"
        }
      },
      "required": [
        "path",
        "hash"
      ],
      "additionalProperties": false,
      "description": "Hash is taken over the canonical-JSON serialisation of the resolved token (recursive key sort, no whitespace)."
    },
    "brief": {
      "anyOf": [
        {
          "type": "object",
          "properties": {
            "path": {
              "type": "string",
              "minLength": 1
            },
            "hash": {
              "type": "string",
              "pattern": "^sha256:[a-f0-9]{64}$"
            }
          },
          "required": [
            "path",
            "hash"
          ],
          "additionalProperties": false
        },
        {
          "type": "null"
        }
      ],
      "description": "Same hash discipline as token when the brief is structured (parsed YAML / JSON). For raw-bytes briefs (markdown body), the hash is over the file's exact bytes; the hash contract is documented per-entry-point in docs/REPLAY.md."
    },
    "sampling": {
      "type": "object",
      "properties": {
        "n": {
          "type": "integer",
          "exclusiveMinimum": true,
          "minimum": 0
        },
        "temperature": {
          "type": [
            "number",
            "null"
          ]
        },
        "seed": {
          "anyOf": [
            {
              "type": "integer"
            },
            {
              "type": "null"
            }
          ]
        }
      },
      "required": [
        "n",
        "temperature",
        "seed"
      ],
      "additionalProperties": false
    },
    "models": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "minLength": 1
          },
          "provider": {
            "type": "string",
            "minLength": 1
          },
          "provider_request_ids": {
            "type": "array",
            "items": {
              "type": "string"
            },
            "description": "Every provider-side request id captured during the run for this model. Empty array allowed (mock runner, local model, provider that doesn't return one). Plural-safe: some providers return multiple relevant ids per call."
          }
        },
        "required": [
          "id",
          "provider",
          "provider_request_ids"
        ],
        "additionalProperties": false
      },
      "description": "Empty array allowed (mock-only runs)."
    },
    "conditions": {
      "type": "object",
      "properties": {
        "requested": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "effective": {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      },
      "required": [
        "requested",
        "effective"
      ],
      "additionalProperties": false,
      "description": "What the user asked for vs what actually ran. Diverges when the runner skips a condition (e.g. mock-only, partial-failure resume)."
    },
    "backfilled": {
      "type": "boolean",
      "description": "Set to true when the block was reconstructed by scripts/backfill-replay.mjs against a report that predates the replay system. Backfilled blocks rely on git history for hashes; verify-replay still works but argv is empty and provider_request_ids cannot be recovered."
    }
  },
  "required": [
    "schema_version",
    "kind",
    "ahd_version",
    "ahd_commit",
    "git_dirty",
    "node_version",
    "platform",
    "invoked_at",
    "argv",
    "token",
    "brief",
    "sampling",
    "models",
    "conditions"
  ],
  "additionalProperties": false,
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://ahd.adastra.computer/schema/replay.schema.json",
  "title": "AHD eval replay block (reproducibility manifest)"
}