Copilot Skills

Agent Skill Converter

Convert AI coding assistant plugins between different platforms to prevent vendor lock-in and promote ecosystem interoperability.

Why this exists

Claude Code has excellent plugins, but we don't want any single platform to become a monopoly. This tool ensures that great agent workflows can work across multiple AI coding assistants—Mistral Vibe, GitHub Copilot, and others.

What this does

Convert skills (slash commands) and agents (subagents) between platforms:

• From Claude Code → Mistral Vibe, GitHub Copilot
• From Mistral Vibe → GitHub Copilot, Claude Code
• From GitHub Copilot → Mistral Vibe, Claude Code

Supported conversions

Component	Claude Code	Mistral Vibe	GitHub Copilot
Skills	.md (table frontmatter)	SKILL.md (YAML frontmatter)	SKILL.md (YAML frontmatter)
Agents	.md in agents/	.toml config files	.md in .github/agents/
Tool names	Bash, Read, Write, Grep, Glob	Same	execute, read, edit, search
Model field	model: sonnet	active_model = "devstral-2"	Omitted (auto-selected)

Example: Converting feature-dev plugin

Source (Claude Code)

claude/plugins/feature-dev/
├── .claude-plugin/plugin.json       # Plugin manifest
├── commands/feature-dev.md          # 7-phase orchestration command
└── agents/
    ├── code-explorer.md             # Codebase analysis subagent
    ├── code-architect.md            # Architecture design subagent
    └── code-reviewer.md             # Code review subagent

Target: Mistral Vibe

out/vibe/
├── skills/feature-dev/
│   ├── SKILL.md                     # Converted skill with YAML frontmatter
│   └── references/workflow.md       # Supporting documentation
└── agents/
    ├── code-explorer.toml           # Converted agent config
    ├── code-architect.toml
    └── code-reviewer.toml

Target: GitHub Copilot

out/copilot/
├── skills/feature-dev/
│   ├── SKILL.md                     # Converted skill (Agent Skills spec)
│   └── references/README.md         # Supporting documentation
└── agents/
    ├── code-explorer.md             # Converted agent with YAML frontmatter
    ├── code-architect.md
    └── code-reviewer.md

Usage

Validate converted skills

# Works with both Vibe and Copilot formats
uv run skills-ref validate ./out/copilot/skills/feature-dev
uv run skills-ref validate ./out/vibe/skills/feature-dev

Install to platform

# Install Vibe skills and agents
./install-skills.sh

# Copilot skills are automatically discovered in workspace
# (no installation needed if in .github/ or copilot-skills.json)

Project structure

• claude/plugins/ - Source plugins from Claude Code
• out/vibe/ - Converted Mistral Vibe format
• out/copilot/ - Converted GitHub Copilot format
• src/skills_ref/ - Python library for parsing and validating Agent Skills
• docs/ - Platform-specific documentation

Development

# Run tests
uv run pytest

# Lint code
uv run ruff check .

# Format code
uv run ruff format .

Key conversion mappings

See CLAUDE.md for complete conversion reference tables and platform-specific notes.

Concept	Claude Code	Vibe	Copilot
Frontmatter	Table syntax	YAML	YAML
Subagent tool	Task	task with agent	agent alias
File operations	Read, Write	Same	read, edit
Shell execution	Bash	bash	execute
Code search	Grep, Glob	Same	search

References

• Agent Skills Specification - Open standard used by Vibe and Copilot
• Claude Code plugins - Original plugin source
• Mistral Vibe - Mistral's coding assistant
• GitHub Copilot Custom Agents - Copilot agent documentation