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 v2.1.228 Home All releases olderv2.1.227 v2.1.229newer
Claude Code v2.1.228

Session state moved out of module globals

Under the hood
Useful2 Signal3
Session State

Lots of shared state now lives per session, so two sessions in one process stop stepping on each other.

What

MCP wiring, interaction and idle tracking, model overrides, refusal-fallback latches, command and Slack completion caches and artifact notice coalescing now live in classes held in a WeakMap keyed by a session root instead of shared module-level variables. Several reset() methods went away, since discarding the root now discards the state.

Evidence

refusalFallbackLatchOriginRequestId

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 v2.1.228 →