GitHub Copilot

GitHub Copilot is GitHub's AI coding assistant. Skern installs skills into its skills directory.

Skill Paths

Scope	Path
User-level	~/.copilot/skills/<name>/SKILL.md
Project-level	.agents/skills/<name>/SKILL.md

The project-level path is shared with codex-cli, cursor, and gemini-cli. See Platform Adapters › Shared project directory.

Why .agents/skills/ and not .github/skills/?

Copilot discovers project skills from any of .github/skills/, .claude/skills/, and .agents/skills/, and personal skills from ~/.copilot/skills/ or ~/.agents/skills/ (GitHub docs: About agent skills). All three project locations are valid; skern uses .agents/skills/ because it is the cross-agent convention shared with Codex CLI, Cursor, and Gemini CLI, so a project-scoped install reaches every agent that reads it. If you need a Copilot-only location, install manually to .github/skills/ — a per-platform destination override is tracked in #101.

Install a Skill

skern skill install code-review --platform github-copilot
skern skill install code-review --platform github-copilot --scope project

Uninstall a Skill

skern skill uninstall code-review --platform github-copilot

Detection

Skern detects GitHub Copilot by the presence of ~/.copilot/.