emit() counts items but no content reaches the MCP client

[daviesayo]

Calling emit() in the execute tool reports a non-zero emitted count, but no content blocks are delivered to the MCP client. Only console.log output (via logs) and the return value come through.

Repro

emit("plain string emit");
emit({ type: "text", text: "mcp text block emit" });
emit({ hello: "object emit" });
return { returnedValue: "this is the return" };

Actual

{"status":"completed","result":{"returnedValue":"this is the return"},"emitted":3,"logs":[]}

The returned value arrives. All three emitted items are counted but never appear as content.

Expected

Three content items alongside the returned value, per the execute skill: "emitted items come first in the tool result, the returned value follows, and the envelope reports an emitted count so you can confirm the items landed."

Notes

• Affects plain strings, MCP text content blocks ({ type: "text", text }), and plain objects alike.
• Workaround is to use console.log, which does reach the client via logs.
• Client: Claude Code, via self-hosted executor MCP server.