The Completr plugin provides powerful auto-completion features for Obsidian, enhancing productivity with advanced suggestions for LaTeX, YAML front matter, and word lists. It supports LaTeX commands without requiring a backslash, including MathJax and snippet insertion with placeholders. The plugin also recognizes YAML front matter keys and values for quick completion. Users can load large external word lists or scan their vaults to create custom suggestions. Customization options allow users to modify LaTeX command sets, manage hotkeys, and blacklist unwanted suggestions. Completr efficiently handles large datasets, ensuring fast and responsive auto-completion. It is ideal for users working with technical content, academic writing, or large text corpora, offering both power and flexibility in managing completions.