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Context

One at a time. Tell it whether you knew, and the ones you did not stay in your pile.

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/context draws your window as a colored grid and suggests cuts.

Compare it with a freshly cleared session and you see which rows, such as messages, MCP or memory, are filling the window.

/context
The whole topic9

  • /context draws your window as a colored grid and suggests cuts.

    Compare it with a freshly cleared session and you see which rows, such as messages, MCP or memory, are filling the window.

  • /btw asks a side question without growing the history.

    Use it for a quick lookup so the main task's context stays clean.

  • /clear costs nothing and stops old history being re-read on every turn.

    Three unrelated tasks in one session means all three are re-read on each turn of the fourth. /clear name labels the old session so /resume can find it.

  • Esc Esc on an empty prompt opens a rewind menu with five choices.

    Restore code and conversation, conversation only, code only, or summarize from or up to a point. It is the fast way back from a wrong turn.

  • After compaction Claude Code re-reads at most five recent files.

    A file over 5,000 tokens comes back only as a path, so a large file you were editing may need a fresh read.

  • A SessionStart hook with the compact matcher reruns after every compaction.

    Its output is added to the compacted context, so it is the place to restore what you never want lost.

  • Rules with paths: frontmatter can be summarized away by compaction.

    They arrive as message history. If a rule must survive, drop the paths: line or move it to the root CLAUDE.md.

  • A long idle session is compacted just before its cache expires.

    Past about 200K tokens on the one-hour cache, Claude Code compacts shortly before expiry. idleCompaction: false turns it off.

  • Rewind does not see files that only Bash changed.

    Checkpoints track edits made with Claude's edit tools. Use git for Bash-only changes and for subagent edits.