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Sweep 28 Sep 2026 · 17:20Z 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
Writing the changelog v2.1.284 compose entry prose · 2/5

Claude Code v2.1.280 ·

The main system prompt in the reminder-read-dup prompt was rewritten

The reminder-read-dup prompt was rewritten with guidance to flag problems but keep working

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

The system prompt text used in the reminder-read-dup context (shown on a duplicate file read) was rewritten. The new wording says that if a real problem is found with the task as specified, Claude should state the concern in a sentence or two, then keep building: delivering the complete work under explicitly stated assumptions while flagging important factors for the user.

Why

This is guidance for how Claude should respond when it spots an issue with the task while re-reading a file, favoring flagging the concern and continuing over stopping or silently changing scope.

See this entry in the whole of v2.1.280 →

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