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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 v2.0.71

MCP SDK Protocol Update

The MCP SDK has been updated to support protocol version 2025-11-25, with the supported versions list now including: 2025-11-25, 2025-06-18, 2025-03-26, 2024-11-05, 2024-10-07.

Evidence

jn at line 255378 (protocol version constant "2025-11-25") and UB1 at line 255540 (supported versions array)

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 v2.0.71 →