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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.

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Claude Code v2.1.221

Telemetry values run through sanitizers in more places

Under the hood
Useful1 Signal0
Telemetry

More analytics fields get cleaned before sending, and some events carry extra context.

What

More analytics payload fields are wrapped before being sent, and a few events gained extra context.

Details
  • Sanitized fields: bug-report reason, MCP error_code (stringified through a mapper), forkLabel on fork-agent queries, the clicked slash-command name, the claude-api subcommand, artifact publish template, and OAuth flow error_code.
  • New session-level set policyPredicateTelemetryEmitted dedupes policy-predicate events.
  • Artifact publish events gained a workshop info blob, and review dispatch gained diffFiles and diffLines.
Evidence

tengu_bug_report_failed

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

See this entry in the whole of v2.1.221 →