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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 v2.1.248

Windows terminal input sequences are now decoded

You'll notice
Useful4 Signal2
Windows

Windows terminals using win32 input mode now deliver function keys and modifiers correctly.

What

Claude Code can decode win32 input-mode key sequences (ESC [ params _) that some Windows terminals emit, turning them into normal key input including function keys, ctrl/alt modifiers and repeat counts.

Details
  • The input parser now carries a high-surrogate field across chunks so emoji and other surrogate pairs split across reads are reassembled.
  • The terminal private-mode table gained WIN32_INPUT_MODE: 9001, and its enable/disable sequence constants moved out of lazy module init.
Evidence

win32HighSurrogate, WIN32_INPUT_MODE: 9001,

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 v2.1.248 →