pi-background-agents

Autonomously implement a specification produced by the specify skill. Reads the spec document, builds a task queue in the session database, implements tasks in parallel where dependencies allow, runs deterministic checks, spawns adversarial verification (different model), and iterates until all evaluation criteria pass or convergence is reached. Use when the user has a spec document (from the specify skill or a similar structured spec) and wants it implemented with guaranteed quality verification. Trigger phrases: "implement this spec", "build this", "execute the spec", "implement-spec", "start implementation", "make it happen", or when the user points to a ./specs/*.md file and asks to build it. Also use when the user has just finished using specify and says "now build it", "go", or "implement".

Guide the user through a structured specification process: define the goal, specify exactly what to build (and what NOT to build), and establish measurable evaluation criteria — all before implementation begins. Produces a living spec document. Use when the user has a goal or feature idea and wants to define the spec, says "specify this", "what's the spec", "define the specification", "how do I achieve this goal", "break this down", "what do I need to build", "write a spec", "define requirements", wants to create a specification with verification criteria, or has just finished using the-goal and wants to turn the goal into a precise, implementable specification. Also use when the user wants to define evaluation criteria before coding, or mentions "adversarial verification", "quality criteria", or "acceptance criteria".