Source Intelligence

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.

All of v2.1.227 Home All releases olderv2.1.226 v2.1.228newer
Claude Code v2.1.227

Per-process state moved into explicit singleton objects

Under the hood
Useful1 Signal1
Session State

MCP state, bundled skills, keybindings and the command classifier became singletons you can reset.

What

Dozens of loose module-level variables and cached closures were replaced with singleton class instances, covering MCP connection state, bundled skills and builtin plugins, browser-extension state, keybindings, the package-manager detector and the Bash command-prefix classifier. Most now expose reset() or invalidate(), which changes when caches clear rather than what you see.

Details
  • MCP state now carries reconnect, toggle, disabled and policy handling plus a skippedDynamicServers list in one place.
  • Also folds in the remote-settings barrier, the /dev/tty stdin override and style-key recording.
Evidence

skippedDynamicServers

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 v2.1.227 →