Copilot harness (GitHub Copilot CLI)

Prefer copilot -p from a host agent (no TUI). Use the TUI only with a real PTY.

Verified against Copilot CLI 1.0.80 (GitHub.Copilot via winget). Re-check copilot --help if flags look stale.

Do not invent terminal() / process() APIs. From Grok or PowerShell, call copilot.exe. This skill is the CLI. Programmatic JSON-RPC is copilot-sdk.

Install (Windows)

winget install --id GitHub.Copilot --accept-source-agreements --accept-package-agreements

Refresh PATH in this process (sessions started before install will not see copilot):