What problem does it solve? Delegating work to subagents requires knowing which harness to use, which models and thinking budgets each one supports, and how to spawn, monitor, and collect results without blocking the parent conversation. ## Core Features & Use Cases - Multi-Harness Spawning: Launch headless subagents on the pi, Claude Code, or Codex harness, each with its own context window and a self-contained prompt. - Model and Effort Selection: Pick recommended models and thinking budgets per harness, such as gpt-5.6-sol on high effort for Codex or the latest Claude Fable for Claude Code. - Lifecycle Management: Check, list, wait on, or cancel up to four concurrent runs, with results returning automatically to the parent. - Use Case: Ask the agent to run three independent code reviews in parallel as Codex subagents while the parent continues editing, then collect their reports when ready. ## Quick Start Spawn a Codex subagent to review the authentication module and report any security issues.