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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 v2.1.193

OTEL_LOG_ASSISTANT_RESPONSES Environment Variable

What

A new environment variable that enables OTEL telemetry logging of assistant response content (previously only OTEL_LOG_USER_PROMPTS existed).

Usage
OTEL_LOG_ASSISTANT_RESPONSES=1 claude
Details
  • When either OTEL_LOG_ASSISTANT_RESPONSES or OTEL_LOG_USER_PROMPTS is set, assistant response text is included in OTEL spans.
  • Without this flag, response content is logged as <REDACTED>.
Evidence

New env var check (search for "OTEL_LOG_ASSISTANT_RESPONSES")

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 v2.1.193 →