TypeError: tools.codex_app__send_message_to_thread is not a function
Open 💬 2 comments Opened Aug 26, 2026 by linonetwo
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of the Codex App are you using (From “About Codex” dialog)?
26.820.60940
What subscription do you have?
Pro
What platform is your computer?
windows + linux remote
What issue are you seeing?
I have attempted to send a status report to the source task 01a03b21-c07f-7713-864f-f29b10d74a6f, but the current session does not expose a cross-task messaging interface; the call result was:
TypeError: tools.codex_app__send_message_to_thread is not a function
Therefore, the message was not delivered. I will continue to conduct read-only discovery and subsequent deployment preparations via the shared GitOps repository; if the platform provides this interface or includes the task in the current collaboration tree, I will immediately resend the status.
What steps can reproduce the bug?
I don't know.Quite unstable.Reminder, server network down for a while and after it resume some functionality can be resumed.
What is the expected behavior?
_No response_
Additional information
_No response_
2 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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I just tried calling "send message to chat" again, but this time it didn't go through. The original result was:
This app tool is no longer available through dynamic tools.
Use the codex_app MCP server.
If that server is unavailable on this host, task delegation is unavailable.
The last successful send occurred on a Windows local task; the current token-center-dev host does not expose the new codex_app MCP send interface. The read function is available, but the send function is indeed unavailable for this task.