Source Intelligence
Follow Discord

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 v2.1.221 Home All releases ←olderv2.1.220 v2.1.222newer→
Claude Code v2.1.221

Version bumped to 2.1.221

Under the hood
Useful2 Signal0
Elsewhere

Claude Code is now version 2.1.221, which shows up in /doctor and update checks.

/doctor
What

Build constants updated throughout, which is what most of the hunks in this area amount to.

Details
  • VERSION 2.1.220 to 2.1.221, BUILD_TIME 2026-07-24T22:17:45Z to 2026-08-03T03:19:26Z, and a new GIT_SHA
  • these feed the User-Agent, /doctor output, update messages and checks, telemetry, the npm view call, claude daemon version warnings, the SDK get_binary_version response and the Remote Control minimum-version error
Evidence

BUILD_TIME: "2026-08-03T03:19:26Z", GIT_SHA: "6efaf12e8b43dc7dbe50e0955c76dc4174a15876"

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 v2.1.221 →