[DOCS] Environment variable reference missing `CLAUDE_CODE_SIMPLE` and simple-mode tool behavior

Documentation Type

Missing documentation (feature not documented)

Documentation Location

https://code.claude.com/docs/en/settings

Section/Topic

Environment variables table (CLAUDE_CODE_* reference).

Current Documentation

The environment variables section lists many CLAUDE_CODE_* variables (for example CLAUDE_CODE_EFFORT_LEVEL, CLAUDE_CODE_DISABLE_BACKGROUND_TASKS, CLAUDE_CODE_ENABLE_PROMPT_SUGGESTION, etc.), but there is no entry for CLAUDE_CODE_SIMPLE.

What's Wrong or Missing?

Claude Code v2.1.49 release notes reference Simple mode via CLAUDE_CODE_SIMPLE and note that this mode now includes the file edit tool in addition to Bash.

The settings reference does not document:

• what CLAUDE_CODE_SIMPLE does,
• valid values,
• its tool limitations/capabilities,
• the new file edit tool behavior.

Suggested Improvement

Add a CLAUDE_CODE_SIMPLE row to the environment variables table with:

• purpose and valid values,
• what tools are available in Simple mode,
• explicit note that as of v2.1.49, file editing is available in Simple mode alongside Bash,
• cross-link to the most relevant usage page.

Impact

Medium - Makes feature difficult to understand

Additional Context

Affected Pages:

| Page | Line(s) | Context |
|------|---------|---------|
| https://code.claude.com/docs/en/settings | 765-800 | CLAUDE_CODE_* environment variable table lacks CLAUDE_CODE_SIMPLE |

Total scope: 1 page affected