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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
HomeDocsClaude Developer Platform 23 Oct 2026
One change · api

compaction-on-demand changedbuild-with-claude/compaction-on-demand

Nearest release: v2.1.309, published 3 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Recorded here
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From line 23 where the diff opens
First seen 21 Sep 2026 this site's first read of the page
Recorded edits14to this page, all time

The whole hunk

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2323 supportedPlatforms:
2424 Claude API: beta
2525 Claude Platform on AWS: beta
26 Google Cloud: beta
26 Claude Models on Google Cloud (Google managed): beta
2727 Microsoft Foundry: beta
2828---
2929 
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3636From then on the block takes the place of the messages it summarizes. It goes first in `messages`, the summarized messages are removed, and your next turn follows it. Claude receives the summary where those messages were.
3737 
3838<Frame>
39 ![On-demand compaction: a request with four messages returns one compaction block, which replaces them in the next request](https://platform.claude.com/docs/images/compaction-on-demand-swap.svg)
39 ![A compaction request with four messages returns one compaction block, no reply; the next request opens with it in their place](https://platform.claude.com/docs/images/compaction-on-demand-swap.svg)
4040</Frame>
4141 
4242## Request a summary
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