GitHub published the design principles behind Squad, its multi-agent orchestration layer inside Copilot — agents coordinate through Git-native artifacts (branches, commits, PRs) rather than opaque in-memory APIs, keeping every step inspectable and reversible. The post details when to fork sub-agents vs. coordinate in-process, and how agent actions remain auditable through standard code review tooling. This is the practical counterweight to black-box agentic pipelines: governance through Git.