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Claude Code opens Mods plugins that can change deeper behavior
Plugins can now alter core behavior, not just add commands, widening the extension surface of a widely used coding agent.
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Claude Code's v2.1.287, released October 1, adds Claude Mods: plugins may now modify deeper behavior of the coding agent, not just add commands.
The same release ships a built-in mod called You should know, where a side agent watches the session and flags things the user or Claude might miss. It is enabled with /plugin enable and only for first-party sessions with telemetry on.
The rest is mostly fixes, including restoring the always-ask safeguard when a dangerous rm command redirects output, and MCP servers can now send URL prompts such as sign-in requests.