Pi Server

The FastAPI server keeps:

• GET /health
• GET /state?thread_id=game-session-001
• GET /nodes
• POST /invoke
• POST /resume
• POST /checkpoint
• POST /reset

/nodes exposes the current 36-node mission fixture, including topology, phase labels, full task text, prerequisites, unlocks, default config, routing metadata, and adjacency. /invoke enforces server-side movement rules before activating the selected graph node: known unit, known target, adjacent target, unoccupied target, and prerequisite-unlocked target. /resume handles accept, correct, skip, and deepen as review actions on that node.

Additional state mutation endpoints:

• POST /route_context stores pointer or curated context from one node output into a target node’s routed context.
• POST /unit/update updates an open Hermes agent’s model, harness, tools, trail context, access list, and block list.
• POST /node/update updates node prompt/default config and player correction metadata.