{
  "schemaVersion": 1,
  "kind": "kyro.debt-contract.golden",
  "description": "Shared Kyro/Lens golden corpus for raw debt classification and canonical projection. Cases are minimized copies of real shapes; long prose is truncated but no key is added, removed or retyped.",
  "contract": {
    "canonical": "Exactly the seven canonical keys, every value valid.",
    "legacy_compatible": "Every present value is valid; canonical fields may be absent and legacy-only keys may be present, so one explicit projection is derivable.",
    "remediation_required": "Identity and status are readable but a present canonical value has the wrong type, so no projection may be trusted.",
    "unsupported": "The raw entry is not a debt object, or its id, title or status is unusable."
  },
  "canonicalKeys": [
    "id",
    "title",
    "origin",
    "priority",
    "status",
    "targetSprint",
    "note"
  ],
  "legacyOnlyKeys": [
    "detail",
    "resolution",
    "addedSprint",
    "severity",
    "source",
    "disposition"
  ],
  "classifications": [
    "canonical",
    "legacy_compatible",
    "remediation_required",
    "unsupported"
  ],
  "diagnosticCodes": [
    "LEGACY_KEY_PRESENT",
    "MISSING_CANONICAL_FIELD",
    "ORIGIN_NOT_SPRINT_NUMBER",
    "LEGACY_VALUE_NOT_STRING",
    "SEVERITY_NOT_RECOGNIZED",
    "STATUS_NOT_RECOGNIZED",
    "IDENTITY_NOT_STRING",
    "NOT_AN_OBJECT"
  ],
  "compatibilityDefaults": {
    "origin": "the enclosing sprint number, or 0 when unknown",
    "priority": "medium, or the priority the legacy severity vocabulary maps to",
    "targetSprint": null,
    "note": "the note joined with Source, Resolution and Disposition prefixes, in that order"
  },
  "maxStringLength": 240,
  "cases": [
    {
      "id": "canonical-exact",
      "title": "Exact seven-field canonical debt",
      "source": "model-catalog-and-routing sprint.json debt[1] (debt-1), minimized note",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-1",
        "title": "A malformed upstream model id fails on first request instead of at startup",
        "origin": 1,
        "priority": "high",
        "status": "resolved",
        "targetSprint": 1,
        "note": "SUPERSEDED: the eager-construction mechanism described in this item's original note was removed by the resolution of debt-2."
      },
      "expected": {
        "classification": "canonical",
        "remediable": false,
        "canonical": {
          "id": "debt-1",
          "title": "A malformed upstream model id fails on first request instead of at startup",
          "origin": 1,
          "priority": "high",
          "status": "resolved",
          "targetSprint": 1,
          "note": "SUPERSEDED: the eager-construction mechanism described in this item's original note was removed by the resolution of debt-2."
        },
        "legacyKeys": [],
        "diagnostics": [],
        "lens": {
          "accepts": true,
          "projection": {
            "id": "debt-1",
            "title": "A malformed upstream model id fails on first request instead of at startup",
            "origin": 1,
            "priority": "high",
            "status": "resolved",
            "targetSprint": 1,
            "note": "SUPERSEDED: the eager-construction mechanism described in this item's original note was removed by the resolution of debt-2."
          },
          "failure": null
        }
      }
    },
    {
      "id": "legacy-compatible-missing-fields",
      "title": "Readable legacy debt with numeric origin and absent priority, targetSprint and note",
      "source": "model-catalog legacy key set over a record whose present values are all valid",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-9",
        "title": "Composition builds TLS infrastructure for unused entries",
        "status": "resolved",
        "detail": "Every catalog entry materialised an SSL context and an HTTP client at composition time.",
        "origin": 1,
        "resolution": "Move upstream identifier validation into ModelCatalogEntry.",
        "addedSprint": 1
      },
      "expected": {
        "classification": "legacy_compatible",
        "remediable": false,
        "canonical": {
          "id": "debt-9",
          "title": "Composition builds TLS infrastructure for unused entries",
          "origin": 1,
          "priority": "medium",
          "status": "resolved",
          "targetSprint": null,
          "note": "Resolution: Move upstream identifier validation into ModelCatalogEntry."
        },
        "legacyKeys": [
          "detail",
          "resolution",
          "addedSprint"
        ],
        "diagnostics": [
          {
            "field": "priority",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": "medium"
          },
          {
            "field": "targetSprint",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "note",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "derived",
            "evidence": "composed from the legacy resolution key",
            "suggested": null,
            "lensDefault": "Resolution: Move upstream identifier validation into ModelCatalogEntry."
          },
          {
            "field": "detail",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key dropped by the canonical projection",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "resolution",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key dropped by the canonical projection",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "addedSprint",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key dropped by the canonical projection",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": true,
          "projection": {
            "id": "debt-9",
            "title": "Composition builds TLS infrastructure for unused entries",
            "origin": 1,
            "priority": "medium",
            "status": "resolved",
            "targetSprint": null,
            "note": "Resolution: Move upstream identifier validation into ModelCatalogEntry."
          },
          "failure": null
        }
      }
    },
    {
      "id": "live-d1-remediation-required",
      "title": "Live model-catalog D1 with string origin and missing canonical fields",
      "source": "model-catalog-and-routing sprint.json debt[0] (D1), minimized prose",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "D1",
        "title": "AnalyzeMeal retry path is unreachable in production",
        "status": "resolved",
        "detail": "The at-most-one retry triggers only on corroboration DISAGREEMENT, which requires an independent meal estimate. No composed provider emits one, so the retry machinery is exercised only by tests.",
        "origin": "food-analysis FR-FA-013 revision",
        "resolution": "Decide explicitly whether the retry stays latent by design until independent-nutrition-corroboration lands, or is re-anchored to a different condition.",
        "addedSprint": 1,
        "note": "RESOLVED AS A DECISION, NOT AS A CODE CHANGE (see ADR-0001). The retry stays latent by design: it is not re-anchored to another trigger, and the machinery is not deleted."
      },
      "expected": {
        "classification": "remediation_required",
        "remediable": true,
        "canonical": null,
        "legacyKeys": [
          "detail",
          "resolution",
          "addedSprint"
        ],
        "diagnostics": [
          {
            "field": "origin",
            "code": "ORIGIN_NOT_SPRINT_NUMBER",
            "severity": "blocking",
            "authority": "evidence",
            "evidence": "addedSprint=1",
            "suggested": 1,
            "lensDefault": null
          },
          {
            "field": "priority",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": "medium"
          },
          {
            "field": "targetSprint",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "detail",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "resolution",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "addedSprint",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].origin is invalid"
        }
      }
    },
    {
      "id": "historical-d1-sprint-1",
      "title": "Sprint 1 checkpoint variant of D1 without note",
      "source": "archive/sprint-001-catalog-configuration-and-routing.checkpoint.json beforeClose.debt[0], minimized prose",
      "target": "history",
      "context": {
        "sprintNumber": 1
      },
      "raw": {
        "id": "D1",
        "title": "AnalyzeMeal retry path is unreachable in production",
        "status": "open",
        "detail": "The at-most-one retry triggers only on corroboration DISAGREEMENT, which requires an independent meal estimate. No composed provider emits one, so the retry machinery is exercised only by tests.",
        "origin": "food-analysis FR-FA-013 revision",
        "resolution": "Decide explicitly whether the retry stays latent by design until independent-nutrition-corroboration lands, or is re-anchored to a different condition.",
        "addedSprint": 1
      },
      "expected": {
        "classification": "remediation_required",
        "remediable": false,
        "canonical": null,
        "legacyKeys": [
          "detail",
          "resolution",
          "addedSprint"
        ],
        "diagnostics": [
          {
            "field": "origin",
            "code": "ORIGIN_NOT_SPRINT_NUMBER",
            "severity": "blocking",
            "authority": "evidence",
            "evidence": "addedSprint=1",
            "suggested": 1,
            "lensDefault": null
          },
          {
            "field": "priority",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": "medium"
          },
          {
            "field": "targetSprint",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "note",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "derived",
            "evidence": "composed from the legacy resolution key",
            "suggested": null,
            "lensDefault": "Resolution: Decide explicitly whether the retry stays latent by design until independent-nutrition-corroboration lands, or is re-anchored to a different condition."
          },
          {
            "field": "detail",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "resolution",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "addedSprint",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].origin is invalid"
        }
      }
    },
    {
      "id": "historical-d1-sprint-2",
      "title": "Sprint 2 checkpoint variant of D1 with note",
      "source": "archive/sprint-002-discovery-and-request-selection.checkpoint.json beforeClose.debt[0], minimized prose",
      "target": "history",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "D1",
        "title": "AnalyzeMeal retry path is unreachable in production",
        "status": "resolved",
        "detail": "The at-most-one retry triggers only on corroboration DISAGREEMENT, which requires an independent meal estimate. No composed provider emits one, so the retry machinery is exercised only by tests.",
        "origin": "food-analysis FR-FA-013 revision",
        "resolution": "Decide explicitly whether the retry stays latent by design until independent-nutrition-corroboration lands, or is re-anchored to a different condition.",
        "addedSprint": 1,
        "note": "RESOLVED AS A DECISION, NOT AS A CODE CHANGE (see ADR-0001). The retry stays latent by design: it is not re-anchored to another trigger, and the machinery is not deleted."
      },
      "expected": {
        "classification": "remediation_required",
        "remediable": false,
        "canonical": null,
        "legacyKeys": [
          "detail",
          "resolution",
          "addedSprint"
        ],
        "diagnostics": [
          {
            "field": "origin",
            "code": "ORIGIN_NOT_SPRINT_NUMBER",
            "severity": "blocking",
            "authority": "evidence",
            "evidence": "addedSprint=1",
            "suggested": 1,
            "lensDefault": null
          },
          {
            "field": "priority",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": "medium"
          },
          {
            "field": "targetSprint",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "detail",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "resolution",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "addedSprint",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].origin is invalid"
        }
      }
    },
    {
      "id": "legacy-severity-mapped",
      "title": "Legacy severity vocabulary supplies the absent priority",
      "source": "compatibility reader severity mapping (blocker maps to critical)",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-11",
        "title": "Recorded before priority existed",
        "status": "open",
        "origin": 1,
        "severity": "blocker",
        "note": "Carried over from the legacy writer."
      },
      "expected": {
        "classification": "legacy_compatible",
        "remediable": false,
        "canonical": {
          "id": "debt-11",
          "title": "Recorded before priority existed",
          "origin": 1,
          "priority": "critical",
          "status": "open",
          "targetSprint": null,
          "note": "Carried over from the legacy writer."
        },
        "legacyKeys": [
          "severity"
        ],
        "diagnostics": [
          {
            "field": "priority",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": "severity=blocker",
            "suggested": null,
            "lensDefault": "critical"
          },
          {
            "field": "targetSprint",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "severity",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key dropped by the canonical projection",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": true,
          "projection": {
            "id": "debt-11",
            "title": "Recorded before priority existed",
            "origin": 1,
            "priority": "critical",
            "status": "open",
            "targetSprint": null,
            "note": "Carried over from the legacy writer."
          },
          "failure": null
        }
      }
    },
    {
      "id": "legacy-severity-unrecognized-with-priority",
      "title": "Unmapped severity is ignored when an explicit priority is present",
      "source": "compatibility reader severity guard (only consulted when priority is absent)",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-14",
        "title": "Priority already decided",
        "origin": 1,
        "priority": "low",
        "status": "open",
        "targetSprint": null,
        "note": "n",
        "severity": "unknown"
      },
      "expected": {
        "classification": "legacy_compatible",
        "remediable": false,
        "canonical": {
          "id": "debt-14",
          "title": "Priority already decided",
          "origin": 1,
          "priority": "low",
          "status": "open",
          "targetSprint": null,
          "note": "n"
        },
        "legacyKeys": [
          "severity"
        ],
        "diagnostics": [
          {
            "field": "severity",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key dropped by the canonical projection",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": true,
          "projection": {
            "id": "debt-14",
            "title": "Priority already decided",
            "origin": 1,
            "priority": "low",
            "status": "open",
            "targetSprint": null,
            "note": "n"
          },
          "failure": null
        }
      }
    },
    {
      "id": "legacy-severity-not-string",
      "title": "Non-string severity is a present invalid value",
      "source": "compatibility reader severity type guard",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-12",
        "title": "Severity written as a number",
        "origin": 1,
        "priority": "high",
        "status": "open",
        "targetSprint": null,
        "note": "n",
        "severity": 7
      },
      "expected": {
        "classification": "remediation_required",
        "remediable": true,
        "canonical": null,
        "legacyKeys": [
          "severity"
        ],
        "diagnostics": [
          {
            "field": "severity",
            "code": "LEGACY_VALUE_NOT_STRING",
            "severity": "blocking",
            "authority": "derived",
            "evidence": "severity is a number, not a string",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "severity",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].severity is invalid"
        }
      }
    },
    {
      "id": "legacy-severity-unrecognized",
      "title": "Unmapped severity with no explicit priority blocks the projection",
      "source": "compatibility reader severity vocabulary guard",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-13",
        "title": "Severity from another tool",
        "origin": 1,
        "status": "open",
        "targetSprint": null,
        "note": "n",
        "severity": "unknown"
      },
      "expected": {
        "classification": "remediation_required",
        "remediable": true,
        "canonical": null,
        "legacyKeys": [
          "severity"
        ],
        "diagnostics": [
          {
            "field": "severity",
            "code": "SEVERITY_NOT_RECOGNIZED",
            "severity": "blocking",
            "authority": "operator",
            "evidence": "severity \"unknown\" maps to no priority and no explicit priority is present",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "priority",
            "code": "MISSING_CANONICAL_FIELD",
            "severity": "info",
            "authority": "operator",
            "evidence": null,
            "suggested": null,
            "lensDefault": "medium"
          },
          {
            "field": "severity",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].severity is invalid"
        }
      }
    },
    {
      "id": "legacy-source-not-string",
      "title": "Non-string source is a present invalid value",
      "source": "compatibility reader note-composition type guard",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-15",
        "title": "Source written as a number",
        "origin": 1,
        "priority": "high",
        "status": "open",
        "targetSprint": null,
        "note": "n",
        "source": 7
      },
      "expected": {
        "classification": "remediation_required",
        "remediable": true,
        "canonical": null,
        "legacyKeys": [
          "source"
        ],
        "diagnostics": [
          {
            "field": "source",
            "code": "LEGACY_VALUE_NOT_STRING",
            "severity": "blocking",
            "authority": "derived",
            "evidence": "source is a number, not a string",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "source",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].source is invalid"
        }
      }
    },
    {
      "id": "legacy-prose-not-string",
      "title": "Non-string resolution and disposition are present invalid values",
      "source": "compatibility reader note-composition type guard",
      "target": "live",
      "context": {
        "sprintNumber": 2
      },
      "raw": {
        "id": "debt-16",
        "title": "Prose keys written as numbers",
        "origin": 1,
        "priority": "high",
        "status": "open",
        "targetSprint": null,
        "note": "n",
        "resolution": 7,
        "disposition": 7
      },
      "expected": {
        "classification": "remediation_required",
        "remediable": true,
        "canonical": null,
        "legacyKeys": [
          "resolution",
          "disposition"
        ],
        "diagnostics": [
          {
            "field": "resolution",
            "code": "LEGACY_VALUE_NOT_STRING",
            "severity": "blocking",
            "authority": "derived",
            "evidence": "resolution is a number, not a string",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "disposition",
            "code": "LEGACY_VALUE_NOT_STRING",
            "severity": "blocking",
            "authority": "derived",
            "evidence": "disposition is a number, not a string",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "resolution",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          },
          {
            "field": "disposition",
            "code": "LEGACY_KEY_PRESENT",
            "severity": "info",
            "authority": "derived",
            "evidence": "legacy-only key retired by canonicalization",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].resolution is invalid"
        }
      }
    },
    {
      "id": "unsupported-bare-string",
      "title": "Structurally unsupported debt entry",
      "source": "schema.validateDebtItem bare-string rejection path",
      "target": "live",
      "context": {
        "sprintNumber": 1
      },
      "raw": "Retry path is unreachable in production",
      "expected": {
        "classification": "unsupported",
        "remediable": false,
        "canonical": null,
        "legacyKeys": [],
        "diagnostics": [
          {
            "field": "$root",
            "code": "NOT_AN_OBJECT",
            "severity": "blocking",
            "authority": "derived",
            "evidence": "raw debt entry is a string, not an object { id, title, ... }",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0] must include id, title, and status"
        }
      }
    },
    {
      "id": "unsupported-missing-id",
      "title": "Debt object without a usable identity",
      "source": "Lens normalizeDebt identity rejection path",
      "target": "live",
      "context": {
        "sprintNumber": 1
      },
      "raw": {
        "title": "Retry path is unreachable in production",
        "status": "open",
        "origin": 1
      },
      "expected": {
        "classification": "unsupported",
        "remediable": false,
        "canonical": null,
        "legacyKeys": [],
        "diagnostics": [
          {
            "field": "id",
            "code": "IDENTITY_NOT_STRING",
            "severity": "blocking",
            "authority": "derived",
            "evidence": "identity cannot be defaulted or inferred",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0] must include id, title, and status"
        }
      }
    },
    {
      "id": "unsupported-bad-status",
      "title": "Debt object with an unrecognized status",
      "source": "Lens normalizeDebt status rejection path",
      "target": "live",
      "context": {
        "sprintNumber": 1
      },
      "raw": {
        "id": "debt-7",
        "title": "Retry path is unreachable in production",
        "status": "banana",
        "origin": 1
      },
      "expected": {
        "classification": "unsupported",
        "remediable": false,
        "canonical": null,
        "legacyKeys": [],
        "diagnostics": [
          {
            "field": "status",
            "code": "STATUS_NOT_RECOGNIZED",
            "severity": "blocking",
            "authority": "derived",
            "evidence": "status must be open, in_progress, resolved or deferred",
            "suggested": null,
            "lensDefault": null
          }
        ],
        "lens": {
          "accepts": false,
          "projection": null,
          "failure": "debt[0].status must be open, in_progress, resolved, or deferred"
        }
      }
    }
  ],
  "sentinels": [
    "live-d1-remediation-required.raw.origin must stay a string",
    "live-d1-remediation-required.raw must not gain priority or targetSprint",
    "historical-d1-sprint-1.raw must not gain note",
    "historical-d1-sprint-2.raw must keep note",
    "every D1 case must keep detail, resolution and addedSprint",
    "legacy severity, source, resolution and disposition keep their compatibility type constraints"
  ],
  "legacyValueRules": {
    "typed": "severity, source, resolution and disposition are interpreted by the compatibility reader, so a non-string value is a present invalid value, not decoration",
    "severity": "an unmapped severity string only blocks while it is the sole source of a priority; with an explicit priority present it is ignored",
    "opaque": "detail and addedSprint are outside the compatibility vocabulary and constrain nothing"
  }
}