Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas
Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).
Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.
Nix conditional patterns: mkIf, optionals, optionalString, mkMerge. Use when writing conditional configuration, avoiding if-then-else, or combining multiple conditional blocks.
Nix module option types and definition patterns. Use when defining options with mkOption, choosing types, or creating submodules.
Git version control workflows, branching strategies, and conflict resolution. Use when managing branches, resolving merge conflicts, understanding git history, or following team git conventions.
Nix library usage patterns: with, inherit, and inline lib. prefixes. Use when deciding how to access lib functions, avoiding the with lib anti-pattern, or writing analysis-friendly Nix code.
Generate conventional commit messages based on staged changes. Use when writing commit messages, understanding conventional commit format, or ensuring consistent commit history.
Basic Nix module structure template. Use when creating new NixOS, Home Manager, or nix-darwin modules from scratch.
Comprehensive Nix validation: treefmt-nix integration, statix/deadnix linting, flake checks, khanelinix-specific patterns. Use when validating Nix code or setting up linting infrastructure.
Writes idiomatic, performant, and maintainable Nix code. Covers best practices, anti-patterns to avoid (like `with`), module system design, and performance optimization.
Conduct thorough, actionable code reviews focusing on critical issues. Use when reviewing pull requests, analyzing code changes, identifying bugs, security vulnerabilities, or suggesting improvements that developers will actually implement.
Validates Nix code correctness, syntax, and buildability. Use when checking for errors, debugging build failures, formatting code, or verifying flake outputs.
Comprehensive security vulnerability assessment and configuration review. Use when analyzing code for security flaws, reviewing dependencies for CVEs, auditing access controls, detecting secrets exposure, or validating compliance with security frameworks.
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
Manages Nix flakes, inputs, dependency resolution, and performance optimization. Use when working with flake.nix, updating inputs, debugging evaluation errors, optimizing flake performance, or composing multi-flake architectures.
Nix naming conventions and code style. Use when naming variables, files, or organizing attributes in Nix code.
khanelinix option namespacing and design patterns. Use when defining module options, accessing configuration values, or understanding the khanelinix.* namespace convention.
khanelinix directory structure and module placement. Use when creating new modules, deciding where files belong, or understanding the modules/ organization. Covers platform separation (nixos/darwin/home/common) and auto-discovery.
