Multi-Agent Multi-Repo Project Workspace Bootstrapper

Scaffold and bootstrap a multi-agent multi-repo project workspace from a Linear project for any coding-agent CLI (Claude Code, Codex, Gemini, Copilot) — clones repos, generates per-repo skills, writes the canonical `AGENTS.md`, and produces architecture docs. Use when setting up a new Linear project workspace, building a multi-agent workspace, bootstrapping cross-repo agent coordination, creating skills for multi-repo work, or initializing a workspace with `.agents/skills/` from a Linear project URL. Delegates per-agent permissions and bridge files to optional adapter skills (`scaffold-claude-code-extensions`, `scaffold-codex-extensions`, `scaffold-gemini-extensions`, `sc…