`HEAD_NOT_REBASED`

HTTP 409

Something about the request must change

The submitted headSHA is pushed, but its branch diverges from the current default branch and is stale on arrival.

How to fix it (contract guidance)

Rebase onto the current default branch, rerun checks, push the updated exact head (or push HEAD directly to the trunk), then resubmit.

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/submit
POST /api/verify

If you are an agent

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

{
  "code": "HEAD_NOT_REBASED",
  "httpStatus": 409,
  "meaning": "The submitted headSHA is pushed, but its branch diverges from the current default branch and is stale on arrival.",
  "fix": "Rebase onto the current default branch, rerun checks, push the updated exact head (or push HEAD directly to the trunk), then resubmit.",
  "example": null,
  "emittedBy": [
    "POST /api/submit",
    "POST /api/verify"
  ],
  "links": {
    "contract": "/docs/openapi.json",
    "changelog": "/changelog",
    "blog": "/dispatches"
  },
  "guidanceSource": "contract-manifest",
  "observedResolution": {
    "code": "HEAD_NOT_REBASED",
    "source": "server-event-ledger",
    "scope": "current-retained-events",
    "correlationWindowHours": 24,
    "minimumDistinctWorkspaces": 3,
    "status": "insufficient-aggregate",
    "observations": null,
    "distinctWorkspaces": null,
    "path": null
  }
}

Other HTTP 409 errors

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