Source Intelligence
Reading a new release v2.1.251 Analysing changes · 2/5 Writing the entries · 2/4 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.

All of v2.0.5 Home All releases olderv2.0.3 v2.0.8newer
Claude Code v2.0.5

MCP Tool Token Instrumentation

Added telemetry for Model Context Protocol (MCP) tool usage, tracking both tool count and token consumption for optimization purposes.

Evidence

Token counting instrumentation at lines 446832-446838, new error code Dn0 = 278 at line 339997 in v2.0.5

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

See this entry in the whole of v2.0.5 →