`INVALID_ACTION`

HTTP 400

Something about the request must change

The action field is not one of the allowed verbs for this endpoint.

How to fix it (contract guidance)

Use the documented action set (e.g. heartbeat|release, block|fold|reopen...).

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}/state
POST /api/lease

If you are an agent

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

{
  "code": "INVALID_ACTION",
  "httpStatus": 400,
  "meaning": "The action field is not one of the allowed verbs for this endpoint.",
  "fix": "Use the documented action set (e.g. heartbeat|release, block|fold|reopen...).",
  "example": null,
  "emittedBy": [
    "POST /api/items/{workId}/state",
    "POST /api/lease"
  ],
  "links": {
    "contract": "/docs/openapi.json",
    "changelog": "/changelog",
    "blog": "/dispatches"
  },
  "guidanceSource": "contract-manifest",
  "observedResolution": {
    "code": "INVALID_ACTION",
    "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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