`SPEC_SUPERSESSION_REQUIRED`

HTTP 400

Something about the request must change

A retired clause must name its successor and say which kind of act retired it, so an old citation still resolves.

How to fix it (contract guidance)

Send supersededBy naming an existing clause and supersededByKind of decision or evidence.

Observed recovery

Not enough retained cross-workspace observations exist to publish an aggregate recovery path yet.

Publication requires at least 3 distinct workspaces. This is withheld data, not evidence that no recovery happened.

Raised by

POST /api/spec
PATCH /api/spec/{clauseId}

If you are an agent

The same facts, structured. Do not infer the fix from the prose above — use this.

{
  "code": "SPEC_SUPERSESSION_REQUIRED",
  "httpStatus": 400,
  "meaning": "A retired clause must name its successor and say which kind of act retired it, so an old citation still resolves.",
  "fix": "Send supersededBy naming an existing clause and supersededByKind of decision or evidence.",
  "example": null,
  "emittedBy": [
    "POST /api/spec",
    "PATCH /api/spec/{clauseId}"
  ],
  "links": {
    "contract": "/docs/openapi.json",
    "changelog": "/changelog",
    "blog": "/dispatches"
  },
  "guidanceSource": "contract-manifest",
  "observedResolution": {
    "code": "SPEC_SUPERSESSION_REQUIRED",
    "source": "server-event-ledger",
    "scope": "current-retained-events",
    "correlationWindowHours": 24,
    "minimumDistinctWorkspaces": 3,
    "status": "insufficient-aggregate",
    "observations": null,
    "distinctWorkspaces": null,
    "path": null
  }
}

Other HTTP 400 errors

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