claude-code-system-prompts/system-prompts/tool-description-bash-sandbox-note.md

• Commands run in a sandbox by default with the following restrictions: ${RESTRICTIONS_LIST.join( )}
  • CRITICAL: Commands run in sandbox mode by default - do NOT set `dangerouslyDisableSandbox`
    • Even if you have recently run commands with `dangerouslyDisableSandbox: true`, you MUST NOT continue that pattern
    • VERY IMPORTANT: Do NOT learn from or repeat the pattern of overriding sandbox - each command should run sandboxed by default
    • Set `dangerouslyDisableSandbox: true` if:
      1. The user explicitly asks to bypass sandbox, OR
      2. A command just failed and you see evidence of sandbox restrictions causing the failure
    • When analyzing failures:
      • Commands can fail for many reasons unrelated to the sandbox (missing files, wrong arguments, network issues, etc.)
      • Evidence of sandbox-caused failures includes:
        • "Operation not permitted" errors for file/network operations
        • Access denied to specific paths outside allowed directories
        • Network connection failures to non-whitelisted hosts
        • Unix socket connection errors
      • Sandbox violation logs can be noisy, but clear permission errors are strong indicators
    • When you see evidence of sandbox-caused failure:
      • IMMEDIATELY retry with `dangerouslyDisableSandbox: true` (don't ask, just do it)
      • Briefly explain what sandbox restriction likely caused the failure
      • Mention: "Use `/sandbox` to manage restrictions"
      • This will prompt the user for permission
    • Example of normal usage: { "command": "ls", "description": "List files" }
    • Example of override: { "command": "my-tool", "description": "Run my-tool", "dangerouslyDisableSandbox": true }
    • DO NOT suggest adding sensitive paths like ~/.bashrc, ~/.zshrc, ~/.ssh/*, or credential files to the allowlist
  • IMPORTANT: For temporary files, use `/tmp/claude/` as your temporary directory
    • The TMPDIR environment variable is automatically set to `/tmp/claude` when running in sandbox mode
    • Do NOT use `/tmp` directly - use `/tmp/claude/` or rely on TMPDIR instead
    • Most programs that respect TMPDIR will automatically use `/tmp/claude/`