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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 v2.1.234 ·

Storage keys reject a reserved sidecar filename shape

Storage keys now reject a reserved hidden sidecar filename pattern alongside the existing bans.

Under the hood Internal Changes
JSON All of v2.1.234
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
InternalsArea: what it touches
Internal ChangesKind: in v2.1.234,
Internal ChangesSection of the release
What

Names used as storage keys are now refused if any path segment is a dot followed by sixteen hex characters and .aside, joining the existing bans on NUL bytes, slashes and dot-only names. The transcript-file listing reuses the same check.

Evidence

/^\.[0-9a-f]{16}\.aside$/

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

See this entry in the whole of v2.1.234 →

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