Adds @check, @simplify, @test, @make, @pm subagents and the /workflow
and /review slash commands from the autonomous multi-agent workflow
gist by ppries.
@pm is rewritten to manage issues in a local ./TODO.md file instead of
Linear (file-only access, documented schema, structured JSON output).
/workflow is adapted: TODO.md-based issue context, generic worktree
paths (no hardcoded ~/repos/veo/sunstone), generic branch examples,
and a Phase 1 guard that verifies origin is on GitHub before any
work begins.
