[bandzalkin]

Summary

Hosts can ask the installed Copilot CLI which models and reasoning efforts this account offers, with no ACP session and no model turn.

Changes

• band.adapters.copilot_acp.list_models uses github-copilot-sdk (copilot_sdk extra) against the executable in config.command, with the configured github_token and env layered on the host environment.
• The client is stopped on every path, including a start that fails.
• Docs: Copilot row in the model-listing table.

Related Issues

Split out of #666 (S-13). Stacked on #705 (feat/host-list-models-omp); review and merge that first.

Testing

• Unit tests pass (uv run pytest tests/ --ignore=tests/integration/ --ignore=tests/e2e/)
• Pre-commit checks pass (ruff check, ruff format --check, pyrefly check)
• Markdown docs pass (pytest --markdown-docs docs)
• Fake client: configured CLI and token, host environment kept under overrides, inherit when unset, and stop after a failed start including cancellation. 5964 passed.

Checklist

• PR title follows Conventional Commits format
• Code follows project style guidelines
• Tests added/updated as needed
• Documentation updated as needed

[bandzalkin]

Superseded by #850, refreshed on current upstream main with a fork-owned maintenance branch. The replacement records the corrected behavior, actual dependencies, own-delta review/replay base, local verification, and the private-core coverage limitation for fork PRs. This closes the superseded proposal only: no merge, fork-main integration, or source-branch deletion. Original PR history and branch are retained.