Where can I see the subagent's logs?

[tanin47]

I'm working on a subagent that calls MCP tools. There seems to be some issues with it. However, I cannot investigate the issue because I am unable to locate the logs for the subagents.

Where can I see those logs? and/or do I need to enable MCP logging somewhere? This is for the Codex desktop app.

[starkmarkus]

I am not sure there is a separate user-facing “subagent log” view in the Codex desktop app today.

The closest things I would check first are:

• use /mcp to see whether the MCP server is connected and healthy
• use /feedback from the affected thread and include logs when submitting the report
• check the local Codex/app-server logs if the desktop app exposes or stores them for your platform

For this specific case, it would be useful if the logs made the subagent boundary explicit: which subagent started, which MCP server/tool it called, what request failed, and whether the failure happened in the subagent, the MCP client, or the MCP server process.

So I think there are two questions here:

1. where are the raw desktop/app-server logs stored locally?
2. is there a way to view/export logs scoped to a specific subagent or MCP tool call?

If there is no scoped subagent log export today, that would be a very useful debugging feature. MCP issues are hard to investigate when the only visible result is that the subagent failed, but the underlying tool call / server stderr is hidden.