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 v2.1.251 Home All releases olderv2.1.250
Claude Code v2.1.251

Better detection of secrets when redacting environment values

You'll notice
Useful4 Signal3
Privacy

Environment values that look like tokens are redacted much more reliably now.

What

The check that decides whether a value looks like a secret, used to redact environment variables before they are recorded, now recognizes common token prefixes including ghp_-style GitHub tokens, github_pat_, glpat-, Slack xox tokens, sk-, pk-, AKIA, JWTs starting eyJ, ya29. and npm_, plus any string of 20 characters or more mixing letters and digits. It replaces a much narrower earlier scheme.

Evidence

gh[opusr]_|github_pat_|glpat-|xox[abpr]-|sk-|pk-|AKIA|eyJ|ya29

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 v2.1.251 →