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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 v2.1.229 ·

Diagnostics comparison rewritten to use derived keys

Working out which editor diagnostics are new got much faster on large files.

Under the hood Internal Changes
JSON All of v2.1.229
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.229,
Internal ChangesSection of the release
What

The tracker that decides which editor diagnostics are new now compares sets of derived keys instead of every field of every pair, turning the comparison from quadratic to linear. The old equality helper is gone.

Evidence

areDiagnosticArraysEqual

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

See this entry in the whole of v2.1.229 →

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