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Sweep 28 Sep 2026 · 18:16Z Build v2.1.284 505 read Stable v2.1.277 Latest v2.1.284 Next v2.1.284 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.280 ·

Session-memory lock replaces cache-replace call

Session memory now uses an explicit lock instead of a cache-replace call

Under the hood Internal Changes
JSON All of v2.1.280
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SessionsArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What

A session-memory function that previously called replaceSessionCache now instead acquires a lock via .acquire(), with a paired function releasing it via .release() at the appropriate point.

Why

Using an explicit lock instead of a cache-replace call helps prevent race conditions around session memory, making concurrent access to session state safer.

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 doubtThe finding does not say what user-visible behavior, if any, this affects.

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