Stable evidence-unavailable headers while trusted mirror-planning inputs are incomplete.

Stable evidence-unavailable headers while trusted mirror-planning inputs are incomplete.

Inputs. No path or query fields are required. No request body is required.

Outputs. See each status below for its media type, schema and headers. A missing record or unavailable capability is not a successful empty result.

Errors. HEAD returns headers without a body. Use the HTTP status and Retry-After.

Rate limits. Public read budgets apply by client IP and route group. This operation can have a smaller route-specific budget. Read Retry-After on 429 or retryable 503 responses.

Example setup. This route has no documented success response. The example shows how to inspect its redirect or refusal; it does not promise an available capability.