Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.247 Home All releases olderv2.1.246 v2.1.248newer
Claude Code v2.1.247

MCP tasks are refused for subagents and non-interactive runs

You'll notice
Useful2 Signal2
MCP

MCP background tasks are hard-blocked for subagents and non-interactive runs, with no setting.

What

Where the MCP task pathway exists, it is hard-blocked whenever the tool call comes from a subagent or from a non-interactive session. There is no setting; the block is wired into the call itself.

Details
  • Task polling now cancels the task on the server if the local record stops being in the running state.
  • The temporary files an MCP task writes alongside itself are cleaned up when it is cancelled.
  • The pathway that these rules govern is not requested anywhere in this build.
Evidence

j.options.isNonInteractiveSession

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.247 →