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Reading a new release v2.1.251 Analysing changes · 2/5 Sorting the findings · 1/4 steps 470 findings $18.91 so far

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 v2.1.0

Tool Search Mode Telemetry

Enhanced telemetry for tool search mode decisions, providing better observability into when and why tool search is enabled or disabled.

Details
  • Logs tengu_tool_search_mode_decision events with reason codes:
  • model_unsupported, mcp_search_unavailable, tst_enabled
  • auto_above_threshold, auto_below_threshold, mcp_cli_mode, standard_mode
  • Includes MCP tool count and threshold information
Evidence

G70() at line 280942 (contains l("tengu_tool_search_mode_decision")

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

See this entry in the whole of v2.1.0 →