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117117### Compaction
118118
119Automatic summarization of your conversation when the [context window](#context-window) approaches its limit. Older tool outputs are cleared first, then the conversation is summarized. Project-root CLAUDE.md and auto memory survive compaction and reload from disk; instructions given only in conversation may be lost. Run `/compact` to trigger manually, optionally with a focus like `/compact focus on the API changes`.
119Automatic summarization of your conversation when the [context window](#context-window) approaches its limit. Project-root CLAUDE.md and auto memory survive compaction, but instructions given only in conversation may not. Run `/compact` to trigger manually, optionally with a focus like `/compact focus on the API changes`.
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121Learn more: [What survives compaction](https://code.claude.com/docs/en/context-window.md#what-survives-compaction) · [When context fills up](https://code.claude.com/docs/en/how-claude-code-works.md#when-context-fills-up)
121Learn more: [What survives compaction](https://code.claude.com/docs/en/context-window.md#what-survives-compaction) · [When context fills up](https://code.claude.com/docs/en/how-claude-code-works.md#when-context-fills-up) · [When Claude Code compacts a conversation you leave idle](https://code.claude.com/docs/en/settings-reference.md#idlecompaction)
122122
123123### Connector
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