Implements parsing, stripping, and validation of ANSI/OSC terminal escape sequences. It sanitizes previews, filenames, and messages before rendering, mitigating terminal injection attacks. The module is self-contained and pure Go, making it reusable in any terminal application that displays untrusted content.

Contains natural/numeric-aware string comparison and Unicode-aware display width utilities along with human-readable size formatting. The natural comparison logic handles numeric substrings with tie-breaking, and the width handling respects grapheme clusters, making these functions suitable for extraction into a small Go utility library.

Hand-written lexer and parser for lf's configuration language. It tokenizes identifiers, strings, quotes, comments, shell commands, and option assignments, then produces expression trees consumed by the evaluator. This demonstrates a compact, dependency-free parsing pattern applicable to any command-line DSL.

Wraps fsnotify with debouncing and symlink path fan-out to provide efficient directory-change notifications. The debouncing and symlink resolution logic is generic enough for reuse in other tools that need responsive filesystem monitoring without event storms.