CLAUDE_CODE_CCR_EVENT_FLUSH_POLICY

Updated October 23, 2026 by Alex Sorokoletov

CLAUDE_CODE_CCR_EVENT_FLUSH_POLICY is a Claude Code environment variable. Added in v2.1.305 and still present in v2.1.310. It is not in the official reference.

Status	Present in v2.1.310
Added	Added in v2.1.305
Category	Other
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_CCR_EVENT_FLUSH_POLICY=<value>
claude

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

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

Related variables

CLAUDE_CODE_EAGER_FLUSH: Eagerly flush output buffers.
CLAUDE_CODE_USE_CCR_V2: Use Claude Code Router v2 for cowork sessions.
CLAUDE_CODE_CCR_EARLY_HYDRATE_PREFETCH
CLAUDE_CODE_CCR_EARLY_SYNC_AFTER_SETTINGS_REFUSAL
CLAUDE_CODE_CCR_FOLD_FIRST_TURN_RESCAN
CLAUDE_CODE_CCR_SURFACE
CLAUDE_CODE_CCR_WORKER_SOCKET
CLAUDE_CODE_JIT_POLICY_AFTER_STARTUP

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_CCR_EVENT_FLUSH_POLICY?

Added in v2.1.305 and still present in v2.1.310.

How do I set CLAUDE_CODE_CCR_EVENT_FLUSH_POLICY?

Export it before starting Claude Code (export CLAUDE_CODE_CCR_EVENT_FLUSH_POLICY=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.