Implements crash-durable file write pattern using temporary files, fsync, and atomic renames. Provides reliable file operations that prevent data loss during crashes or power failures. Self-contained utility that could be extracted for any project requiring safe file writes.

Provides safe markdown document creation, updating, and trashing with path traversal prevention and atomic writes. Includes proper error handling and secure defaults. Demonstrates skill in building secure file operations for knowledge management systems.

Generates repository context for AI agents including git status, file metadata, and directory structure. Enables repository-aware assistance for AI coding agents. Self-contained module that could be extracted to provide context to LLMs in any development project.

Generates Claude Code/Codex skill files that teach AI agents how to use the Field Theory CLI commands. Creates structured markdown documentation with examples and command references. Shows skill in designing effective agent interfaces for CLI tools.

Implements rule-based bookmark classification using prioritized regex patterns to categorize bookmarks into tool, security, technique, launch, research, opinion, and commerce categories. Demonstrates practical text classification with clear priority ordering and extensible pattern matching.