Skills
Claude Code 2.1.261 ships /skill-doctor, which prices every loaded skill and names the ones never invoked
The v2.1.261 release adds /skill-doctor to list loaded skills that have gone unused along with their context cost, and it says where to turn each one off. In an interactive session the report opens in the /plugin manager Stats tab; under -p it prints as plain text. This matters because the skill listing is re-sent every turn whether or not a skill fires, so a stale skill collection is a fixed per-request tax, and until now there was no way to measure it. Requires v2.1.252 or later and does not work in sessions that skip feature-flag fetching.
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