[Feature Request] Auto-check .gitignore before suggesting git add/commit

Problem

Claude Code suggests committing gitignored files without checking .gitignore first. Even with explicit CLAUDE.md rules ("NEVER commit gitignored files -- check .gitignore when unsure"), Claude still proposes "Want me to commit and push?" for files in gitignored directories.

Steps to Reproduce

1. Have a .gitignore with a directory listed (e.g., Future Modules/)
2. Ask Claude Code to create a file in that directory
3. Claude creates the file, then suggests "Want me to commit and push?"
4. User must manually catch and ask "is that gitignored?" -- only then does Claude check

Current Behavior

• Claude suggests git add + git commit for gitignored files
• Relies on user or CLAUDE.md instructions to prevent the error
• No automated validation before suggesting commit

Expected Behavior

Before suggesting git add or git commit, Claude Code should:

1. Run git check-ignore <file> or check .gitignore patterns for target files
2. Warn the user if the file is gitignored
3. Skip gitignored files from commit suggestions automatically

Why This Matters

Prevents accidental commits of:

• Private configuration files (API keys, credentials)
• Local caches and database files
• User-generated logs and temporary data
• Planning/spec documents marked as local-only

Environment

• Claude Code: VS Code extension (latest)
• OS: Windows 11 Pro
• Model: Claude Opus 4.6