{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://target-revenue.example/schemas/conversion_attestation.schema.json",
  "title": "Conversion Attestation",
  "description": "Stage 0 schema per specs/TechnicalSpecificationDocument.md §3.5. Evidence of conversion only — never a precondition for conversion status (PRD FR-7/G6, working default Q13). Tooling must be able to recompute conversion from the Phase Manifest and Target Ledger alone, without this document.",
  "type": "object",
  "required": [
    "phase",
    "milestone_release",
    "conversion_timestamp",
    "future_license",
    "final_development_credit",
    "final_remission_credit",
    "final_outstanding_target",
    "ledger_checkpoint"
  ],
  "additionalProperties": false,
  "properties": {
    "phase": {
      "type": "string",
      "pattern": "^trsl:phase:[a-zA-Z0-9._-]+$"
    },
    "milestone_release": {
      "type": "string",
      "description": "Must match phase.milestone_release.name in the Phase Manifest."
    },
    "conversion_timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "The moment the ledger fold first reaches Outstanding Target = 0."
    },
    "future_license": {
      "type": "string",
      "enum": ["MIT", "Apache-2.0"]
    },
    "final_development_credit": { "type": "number", "minimum": 0 },
    "final_remission_credit": { "type": "number", "minimum": 0 },
    "final_outstanding_target": {
      "type": "number",
      "const": 0,
      "description": "MUST equal 0."
    },
    "ledger_checkpoint": {
      "type": "string",
      "description": "Points to the last ledger entry id or hash included in the fold."
    },
    "signature": {
      "type": "string",
      "description": "Ed25519 signature over the canonical serialization. Optional for Stage 0 fixtures."
    }
  }
}