- Make index_name optional, auto-use current directory name
- Read .gitignore patterns and respect them during indexing
- Add _read_gitignore_patterns() to parse .gitignore files
- Add _should_exclude_file() for pattern matching
- Apply exclusion patterns to both PDF and general file processing
- Show helpful messages about gitignore usage
Now users can simply run: leann build
And it will use project name + respect .gitignore patterns.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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