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Sweep 29 Sep 2026 · 18:10Z Build v2.1.285 506 read Stable v2.1.280 Latest v2.1.285 Next v2.1.285 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.280 ·

Regression fix in memoized regionKids lookup

Fixed a bug where a region-lookup cache referenced an undefined variable

Under the hood Bug Fixes
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
UI ComponentsArea: what it touches
Bug FixesKind: in v2.1.280,
Bug FixesSection of the release
What

A memoization map (a cache keyed by lookup results so the same computation isn't repeated) had been built using an out-of-scope variable, W.regionKids and W.id. It now correctly uses the loop variable, te.regionKids and te.id.

Why

The old code referenced a variable that wasn't actually in scope for that lookup, which could produce incorrect or broken results. This fix makes the cache use the correct data.

See this entry in the whole of v2.1.280 →

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