GitHub Copilot CLI discovers SKILL.md skills from .github/skills/ and custom
agents from .github/agents/, so ECC's catalog can be installed there without a
conversion step. This adds a managed-project install target that places both.
Scope is deliberately limited to agents and skills. ECC hooks are written
against Claude Code's event model, and commands rely on slash-command argument
substitution Copilot does not provide, so neither is installed.
Agent frontmatter goes through an allowlist transform rather than a passthrough:
Copilot resolves the session model from user configuration, so a Claude model id
makes it warn and fall back on every invocation; Claude tool names are not
Copilot tool names, and Copilot governs tool access per session via
--allow-tool/--deny-tool. Unknown keys added to ECC agents later therefore
cannot leak into the Copilot copy.
Target selection stays permissive in supportsModule so dependency-anchor modules
still resolve; planOperations is what narrows the install, matching the
convention used by the other adapters.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
