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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 v2.1.224 ·

Compaction boundaries can appear in streamed output

Compaction boundary markers can now show up in streamed output.

You'll notice Improvements
JSON All of v2.1.224
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
CompactionArea: what it touches
ImprovementsKind: in v2.1.224,
ImprovementsSection of the release
What

When a conversation is compacted, the marker for that boundary is now eligible to be emitted in streaming output alongside local command messages.

Details
  • The filter accepts system messages with subtype compact_boundary; previously only local_command passed.
  • A predicate can be registered to suppress them; with nothing registered it defaults to allowing them, so in this build they are emitted.
Evidence

compact_boundary

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

See this entry in the whole of v2.1.224 →

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