CLAUDE_CODE_MORNING_BRIEF_PROMPT

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_MORNING_BRIEF_PROMPT is a Claude Code environment variable. Removed between v2.1.212 and v2.1.215, so current releases ignore it. 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_MORNING_BRIEF_PROMPT=<value>
claude

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

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

Related variables

• CLAUDE_CODE_BRIEF: Toggle brief/concise output mode — shorter responses from Claude.
• CLAUDE_CODE_BRIEF_UPLOAD: Brief mode specifically for upload operations.
• CLAUDE_CODE_PROMPT_CACHE_TTL
• CLAUDE_CODE_SIMPLE_SYSTEM_PROMPT: Switches to a reduced system prompt, stripping out the non-essential guidance sections that bulk up the default prompt.
• CLAUDE_CODE_SYSTEM_PROMPT_GB_FEATURE: Names a GrowthBook feature flag whose value overrides the system prompt — but only when CLAUDE_CODE_REMOTE is set.
• CLAUDE_CODE_VERIFY_PROMPT: The verify flow was reworked; the standalone prompt override no longer maps to how verification runs.
• CLAUDE_CODE_APPEND_PROMPT_HEAD
• CLAUDE_CODE_HOST_PROMPT_SUPERSEDES_RECORD

Frequently asked questions

All variables, searchable: Claude Code environment variables.