GitHub agents

Custom agent profiles, read by Copilot on GitHub.com, the CLI and supported IDEs. A profile needs YAML frontmatter with a description to register.

Copilot code review does not read this directory; its instructions are .github/copilot-instructions.md, .github/instructions/** and AGENTS.md.

Conventions live in AGENTS.md and .agents/docs/. Profiles point at them and must not restate them, so there is one copy to keep current.