mcp: the stdio record resource objectstack://objects/{name}/records/{id} answers a missing or hidden id as an uncoded { error }, while its own refusals and the get_record tool answer RECORD_NOT_FOUND 404 #33178

epic:#32897#1 · os-tesla · session_01L9qibzoApSyVPuia3NCrBY

Filing gate: ① a named-site behaviour gap, class b. Carried out of #33030 (PR #33175, head 59ccee50): the card thread's out-of-scope finding (1), re-read by the seat at that head. ⛔ Not a claim; triage sets the lane and grade.
reach: the stdio MCP resource template objectstack://objects/{objectName}/records/{recordId} (packages/mcp/src/mcp-server-runtime.ts ~:2122–2142 at PR #33175's head). Read from code and measured by the card thread at that head; not measured on a deployment.

Business reason

After PR #33175, a stdio client that asks the get_record tool for a missing or hidden id gets the coded { error: { code: "RECORD_NOT_FOUND", status: 404 } } the HTTP door answers. The same client reading the record resource for the same id still gets {"error":"Record \"<id>\" not found in \"<object>\""} with no code and no status, although every thrown refusal on that resource (its catch, #23509 / #31270) already answers { error, code, status }. A client that branches on the code must special-case the resource's miss.

What is true at PR #33175's head

• The resource's if (!record) branch writes JSON.stringify({ error: ... }) only.
• Its catch renders dataDoorRefusalEnvelope(err, objectName) with code and status.
• get_record now throws recordNotFoundError(objectName, recordId) (@objectstack/core) into its own catch for a null read.

Expected

The record resource answers a missing or hidden id with the same { error, code: "RECORD_NOT_FOUND", status: 404 } members its other refusals carry, identical for missing and hidden ids (no existence oracle). error stays a string.

Dedupe: is:issue is:open stdio record resource not found code → #33030 (the tool half, PR #33175), #33156; none for the resource.

Part of the MCP epic #32897 (M3: answers that agree with the gate).

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