A comprehensive codebase of best practices, coding rules, and workflow automation for AI-assisted development with GitHub Copilot. Includes DDD, Clean Architecture, testing, commit conventions, and more. Reference implementation for modern .NET backend projects.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when domain logic leaks into API/Infrastructure, project references violate layer boundaries, or you need to decide between CQS (always), CQRS bus (complex domains), and DDD patterns (invariants and events).
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when editing code structure with text matching ambiguity, handling "oldstring not unique" problems, or performing formatting-independent pattern matching across function signatures, method calls, and class structures.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when understanding project composition by language, measuring code change impact, or generating code statistics for CI/CD metrics.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when listing all methods, functions, or classes in a file, exploring unfamiliar code, getting API overviews, or deciding what to read selectively without loading entire files.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when searching for files by name, pattern, or type in large directories, or building file lists for pipelines with other tools.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when choosing interactively from search results, files, processes, or any command output with preview capabilities.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when querying JSON files, filtering or transforming JSON data, or extracting specific fields from large JSON files without loading entire file contents (saves 80-95% context).
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when querying YAML files, filtering or transforming configuration data, or extracting specific fields from large YAML files like docker-compose.yml or GitHub Actions workflows without loading entire files (saves 80-95% context).
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when performing text find & replace, batch transformations across files, or when JavaScript-style regex syntax is preferred over sed.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when searching for text patterns across files, finding specific code locations, or getting lines with surrounding context in a single call.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when viewing source files or documentation with syntax highlighting, previewing files with Git integration, or when enhanced readability would improve code review.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use before writing any test or implementation task, when observable behavior needs to be captured in business language scenarios and approved by the user before code begins.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when running mutation testing, killing mutants, verifying test quality, checking mutation score, or analyzing survivors after the test baseline is green.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when writing tests from the outside-in, defining behavior before code, or any feature where tests should start from observable business behavior and let internal design emerge.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when implementing any feature or fix using TDD, before writing any implementation code.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when building Model Context Protocol (MCP) servers in .NET, configuring tools, transports (SSE/stdio), JSON serialization for AOT, or testing MCP endpoints.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when creating OpenAPI mock examples for Microcks, setting up request/response routing with dispatchers, or mapping request fields to mock responses.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when converting existing .prompt.md or .instructions.md files to reusable SKILL.md format, before guessing structure or deciding what to keep/remove.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
Use when configuring Git hooks in .NET projects before team commits occur, to enforce commit message standards and code formatting automatically.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
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 Codex's capabilities with specialized knowledge, workflows, or tool integrations.
SebastienDegodez/copilot-instructions
Skill Claude CodeCodex
This is a sample skill for testing the evaluator.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: