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

Session identity and directories collapse into one object

Under the hood
Useful2 Signal3
Session State

Session identity and working directories now live in one object that can be forked per project.

What

The scattered globals for session id, parent id and working directories were replaced by a single session object that can be subscribed to and updated, with a project fork that keeps the root's identity but overrides directories. Re-identifying through such a fork now throws instead of silently succeeding.

Details
  • The settings cache and the CLI launch flags (interactive, print output format, client type, bypass permissions, scheduled tasks, init JSON schema and the rest) were each folded into a class with a reset().
Evidence

A withProject fork cannot re-identify the session

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 →