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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Windows terminal input sequences are now decoded

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

You'll notice New Features
JSON All of v2.1.248
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4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
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New FeaturesKind: in v2.1.248,
What probably matters to youSection of the release
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.

See this entry in the whole of v2.1.248 →

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