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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 v2.1.14 20 Jan 2026

Tool Usage Tracking for Deferred Tools

What

Added tracking infrastructure for deferred tool usage patterns.

Details

Tracks usageCount and lastUsedAt for tools
Enables smarter tool deferral decisions based on usage frequency
Similar tracking added for skill usage with time-decay weighting

Evidence

R22() at line 280135 (tool usage tracker, contains "toolUsage", "usageCount", "lastUsedAt")

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

See this entry in the whole of v2.1.14 →