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Sweep 27 Oct 2026 · 19:04Z Build v2.1.312 531 read Stable v2.1.308 Latest v2.1.312 Next v2.1.312 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.312 ·

Trailing whitespace padding no longer comes straight from random numbers

A routine that adds a random-looking run of trailing spaces and tabs now builds it from a different source instead of plain random numbers

Under the hood Internal Changes
JSON All of v2.1.312
Under the hoodTier: how much it should matter to you
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1Signal: worth watching, 1 to 5
API RequestsArea: what it touches
Internal ChangesKind: in v2.1.312,
Internal ChangesSection of the release

Unclear It is not clear whether the new source produces the same padding each time, so whether behaviour actually changes is unknown.

What

Claude Code has a small routine that adds a run of spaces and tabs to the end of some text. It appears to be padding that keeps cached copies from being reused. Before, each character and the length of the run were picked with plain random numbers. Now the mix of spaces and tabs is built from the result of another internal calculation.

Why

If that calculation gives the same result each time, the padding would be the same each time instead of random.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear whether the new source produces the same padding each time, so whether behaviour actually changes is unknown.

See this entry in the whole of v2.1.312 →

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