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

Probes report whether old code paths are still reached

Under the hood
Useful1 Signal2
Telemetry

One-off counters now show which old code paths are still being used, so they can be removed.

What

Four one-shot telemetry probes now fire the first time a legacy path is hit, to work out what can be deleted. They cover the Co-Authored-By attribution setting, legacy local settings, the legacy progress bridge, an older token-adoption path and legacy plugin tip counts. No user-visible effect.

Details
  • Each probe is deduplicated per call site and can be reset; the token-adoption probe reports the site it fired from, and the plugin tip probe fires once per distinct outcome pair.
Evidence

tengu_dead_probe_include_coauthored_by, tengu_dead_probe_adopt_ticks_token

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

See this entry in the whole of v2.1.227 →