Extend Claude with skills changedskills
Nearest release: v2.1.305, published 2 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 20 Oct 2026 21:32 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 20 Oct 2026 21:37 UTC.
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3838* **Extensions**: unused skills, MCP servers, and plugins compared with their context cost, and slow [hooks](/docs/en/hooks)
3939* **`CLAUDE.md` files**: local `CLAUDE.md` files that duplicate checked-in ones, checked-in [`CLAUDE.md` content Claude could derive from the codebase](/docs/en/memory#my-claude-md-is-too-large), and the always-loaded guidance that remains, which Claude offers to migrate into skills and nested `CLAUDE.md` files that load on demand
4040* **Permissions**: an offer to make [auto mode](/docs/en/permissions#permission-modes) your default permission mode and to [pre-approve](/docs/en/permissions) read-only commands that you frequently deny
41* **Usage**: on a Pro, Max, Team, or Enterprise plan, the [changes `/usage` recommends](/docs/en/costs#plan-usage-breakdown) to lower your plan usage, measured over the last 7 days. Claude proposes the changes it can make itself and reports the rest as advice, such as a command for you to run. The usage check requires Claude Code v2.1.305 or later, and `/doctor` leaves it out while [Remote Control](/docs/en/remote-control) is connected.
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4243For read-only installation diagnostics without starting a session, run `claude doctor` in your terminal instead.
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