CLAUDE_CODE_SLEEP_COMPACT_AFTER_MS

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_SLEEP_COMPACT_AFTER_MS is a Claude Code environment variable. Added in v2.1.296 and still present in v2.1.296. It is not in the official reference.

Status	Present in v2.1.296
Added	Added in v2.1.296
Category	Context and compaction
Official docs	Not listed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_SLEEP_COMPACT_AFTER_MS=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_SLEEP_COMPACT_AFTER_MS": "<value>"
  }
}

Related variables

CLAUDE_AFTER_LAST_COMPACT: Request only conversation logs after last compaction.
CLAUDE_CODE_SLEEP_COMPACT
CLAUDE_CODE_AUTO_COMPACT_WINDOW: Controls the token window threshold at which automatic context compaction kicks in.
DISABLE_AUTO_COMPACT: Disable automatic compaction only (manual /compact still works).
DISABLE_CLAUDE_CODE_SM_COMPACT: Disable session memory compaction.
DISABLE_COMPACT: Disable all compaction (manual + auto).
ENABLE_CLAUDE_CODE_SM_COMPACT: Force enable session memory compaction.
CLAUDE_CODE_COLD_COMPACT

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_SLEEP_COMPACT_AFTER_MS?

Added in v2.1.296 and still present in v2.1.296.

How do I set CLAUDE_CODE_SLEEP_COMPACT_AFTER_MS?

Export it before starting Claude Code (export CLAUDE_CODE_SLEEP_COMPACT_AFTER_MS=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.