$swarm Spawn isolated agents to execute tasks in parallel with Codex session agents. Fresh context per agent. Integration modes: - Via - crank creates waves from beads and invokes for each wave - Standalone - direct invocation for ad-hoc parallel work Requires a multi-agent runtime. Prefer runtime-native Codex session agents. If spawning is unavailable, fall back to sequential execution in the current session. Architecture Runtime preference: 1. If is available, use Codex session agents. 2. If your runtime exposes roles, use for execution and for file discovery. 3. If spawning is unavailable,…