Cancel Prompt throws JSONRPC error w/ Gemini CLI

[jwflicker]

Summary

According to spec, after sending a cancel request the agent, after all ongoing operations have been successfully aborted and pending updates have been sent, the Agent MUST respond to the original session/prompt request with the cancelled stop reason. I am not seeing a Prompt Response with a cancel reason, but am instead getting a JSONRPC exception to the cancel request.

Perhaps this is a bug with the Gemini CLI...

This seems to happen if i cancel before i get the first thought back... After the first thought is received, cancelation will work as expected and send me back a prompt response with cancel reason.

Expected Behavior:
After sending a cancel request, i should eventually get a prompt response with stopReson of cancelled. I am never getting that with Gemini CLI, rather I am getting an JSONRPC error when sending the cancel request.

Actual Behavior:

acceptPromptRequest('{"prompt":[{"text":"where is florida","type":"text"}],"sessionId":"d102bd54-8dc5-411e-a136-6bb218ed14b2"}');
null

CancelNotification[meta=null, sessionId=d102bd54-8dc5-411e-a136-6bb218ed14b2]
[Trace - 07:56:17 אחה״צ] Sending notification 'session/cancel'
Params: {
  "sessionId": "d102bd54-8dc5-411e-a136-6bb218ed14b2"
}


{"jsonrpc":"2.0","id":"3","error":{"code":-32603,"message":"Internal error","data":{"details":"The user aborted a request."}}}

ACP Version

gemini 0.8.1