`BUILDER_LEASE_REQUIRED`

HTTP 403

Something about the request must change

Progress can only be advanced by the principal holding the active builder lease.

How to fix it (contract guidance)

Claim the item as builder (or heartbeat your existing lease) before advancing progress.

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/items/{workId}/progress

If you are an agent

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

{
  "code": "BUILDER_LEASE_REQUIRED",
  "httpStatus": 403,
  "meaning": "Progress can only be advanced by the principal holding the active builder lease.",
  "fix": "Claim the item as builder (or heartbeat your existing lease) before advancing progress.",
  "example": null,
  "emittedBy": [
    "POST /api/items/{workId}/progress"
  ],
  "links": {
    "contract": "/docs/openapi.json",
    "changelog": "/changelog",
    "blog": "/dispatches"
  },
  "guidanceSource": "contract-manifest",
  "observedResolution": {
    "code": "BUILDER_LEASE_REQUIRED",
    "source": "server-event-ledger",
    "scope": "current-retained-events",
    "correlationWindowHours": 24,
    "minimumDistinctWorkspaces": 3,
    "status": "insufficient-aggregate",
    "observations": null,
    "distinctWorkspaces": null,
    "path": null
  }
}

Other HTTP 403 errors

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