/**
 * The subagent runtime inside a host that supplies its own model provider and
 * file locations (e.g. Riker's coding workers):
 * - children reuse the parent's model registry, so a provider registered on
 *   the parent at runtime (header-only auth, like a Cloudflare AI Gateway
 *   worker) carries its headers into the child's request, with no provider key;
 * - PI_SUBAGENTS_DIR moves every file the runtime writes under one root.
 *
 * Everything stays on loopback: a stub OpenAI-compatible server on
 * 127.0.0.1:0 and a temp PI_CODING_AGENT_DIR so no user auth/models load.
 */
export {};