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Sweep 27 Oct 2026 · 19:04Z Build v2.1.312 531 read Stable v2.1.308 Latest v2.1.312 Next v2.1.312 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.311 ·

Prompt assembly can take an extra block of text

The step that joins prompt sections can now insert an extra block of text after the first section

Under the hood Internal Changes
JSON All of v2.1.311
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
AgentsArea: what it touches
Internal ChangesKind: in v2.1.311,
Internal ChangesSection of the release

Unclear It is not clear what text, if any, Claude Code puts into this extra block or when.

What

Claude Code builds the prompt it sends to the model by joining several sections together. The step that does this can now accept an extra block of text. When that block is not empty, Claude Code trims trailing spaces from it and places it after the first section and before the main content.

Why

This gives Claude Code a place to add more text to the prompt it assembles.

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 doubtIt is not clear what text, if any, Claude Code puts into this extra block or when.

See this entry in the whole of v2.1.311 →

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