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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.280 ·

New invariant guard on sync journal notes

A new internal check now throws an error if a sync journal note carries a chain that would otherwise silently be dropped

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
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What

Claude Code keeps a sync journal to track certain state. A new runtime assertion now throws an error when a journal note carries a chain of data that its reader would otherwise drop, such as entries out of order, a malformed link, or a carrier type this build doesn't know how to write.

Why

This turns a case that used to fail silently, by quietly discarding data, into a visible error, making problems in sync journal data easier to catch instead of going unnoticed.

See this entry in the whole of v2.1.280 →

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