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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.

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Claude Code v2.1.246 25 Aug 2026

Killing an MCP task now tears down its helper session too

You'll notice

Useful3 Signal2

MCP

Killing an MCP task now cleans up its helper session and metadata instead of leaving state behind.

What

Killing an MCP task aborts the drive controller and issues a cancel alongside the main abort, clears the parked state, and waits for the pending write to finish before deleting the helper session and project directory metadata. Less chance of leftover state after a kill.

Details

Runs unconditionally for MCP task entries.

Evidence

McpTask.kill deleteMcpTaskMetadata:

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

See this entry in the whole of v2.1.246 →