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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 v2.1.242

Slash commands load on demand instead of at startup

You'll notice
Useful3 Signal2
Slash Commands

Built-in slash commands load when you invoke them, so startup does less work.

What

Each built-in slash command is now a separate chunk fetched when you invoke it, rather than code loaded as part of the main bundle, which moves that work off startup.

Details
  • The registry entries changed from wrappers around already-loaded module initializers to real dynamic imports, one chunk per command, covering /config, /mcp, /skills, /install-github-app and the rest.
  • The list of available command names still comes from the same map's keys, so nothing changes about which commands exist or how they are discovered.
  • The conditional entries for background/daemon/stop and workflows are unchanged.
Evidence

"install-github-app": () => import(

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.242 →