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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 v2.1.221 3 Aug 2026

MCP skills funnel telemetry

Under the hood

Useful1 Signal0

MCP

Skills fetched from MCP servers now report extra usage stats back to Anthropic.

What

Fetching skills from an MCP server now reports two points in the funnel.

Details

Events fire at "parsed_nonempty" and "surfaced".
Each is tagged with the server name and skill count.
A cause of "initial" or "refetch" is tracked per server plus config key.

Evidence

tengu_mcp_skills_funnel

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

See this entry in the whole of v2.1.221 →