PiAI/Subagent

• Extensions – pi-mono

  • PiAI has no native AI/Agent/Subagent definition and no agents/*.md format. Subagent-like behavior is orchestrated from a PiAI/Extension in TypeScript or JavaScript, using the agent-flow events before_agent_start, agent_start, agent_end, and agent_settled.
  • The packages reference lists exactly four bundleable resource types — extensions, skills, prompt templates, and themes. Agent definitions are not among them.
  • Same trade as PiAI/Hook: an extension has broad control rather than a fixed schema, and nothing declarative for a cross-host build to transpile.