AGT policy authoring

Use this skill when asked to create, review, or tailor an AGT policy for the repository currently being inspected. Produce a repository-local policy source at .agt/policy.json; do not activate it or replace a user policy without explicit approval.

This skill targets the schema supported by @microsoft/agent-governance-copilot-cli. It helps author policy for a repository, but it does not make a host agent enforce that policy unless the host has a compatible AGT integration.