Source Intelligence
Reading a new release v2.1.251 Analysing changes · 2/5 Writing the entries · 2/4 steps 470 findings $18.91 so far

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 v2.1.71 Home All releases olderv2.1.70 v2.1.72newer
Claude Code v2.1.71

Client Data Fetching System [Gradual Rollout]

What

A new clientData fetching system that pulls configuration and feature data from the server at session start, with caching, retry logic, and 401 token refresh.

Status

Feature-flagged — appears to require OAuth subscriber status with specific profile scopes.

Details
  • Fetches client data on session start with exponential backoff retries
  • Caches responses to disk; skips writes if unchanged
  • Handles 401 by refreshing OAuth tokens and retrying
  • Skipped when "nonessential traffic" is disabled or when user lacks the required OAuth scopes
Evidence

Client data infrastructure (search for "[clientData] fetch ok")

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

See this entry in the whole of v2.1.71 →