CLAUDE_CODE_CCR_FOLD_FIRST_TURN_RESCAN

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_CCR_FOLD_FIRST_TURN_RESCAN is a Claude Code environment variable. Added in v2.1.287 and still present in v2.1.295. It is not in the official reference.

How to set it

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

export CLAUDE_CODE_CCR_FOLD_FIRST_TURN_RESCAN=<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_FOLD_FIRST_TURN_RESCAN": "<value>"
  }
}

Related variables

• CLAUDE_CODE_EXIT_AFTER_FIRST_RENDER: Exit after first UI render (testing).
• CLAUDE_CODE_INVESTIGATE_FIRST: Instructs the agent to read and investigate before acting — enforcing "read before write." Converts an agent that might immediately start editing into one that first gathers context.
• CLAUDE_CODE_USE_CCR_V2: Use Claude Code Router v2 for cowork sessions.
• CLAUDE_SLOW_FIRST_BYTE_MS: Default 30,000ms.
• CLAUDE_CODE_CCR_EARLY_HYDRATE_PREFETCH
• CLAUDE_CODE_CCR_SURFACE
• CLAUDE_CODE_PER_TURN_TIMING
• CLAUDE_CODE_SILENT_TURN_REMINDER

Frequently asked questions

All variables, searchable: Claude Code environment variables.