This is exactly how enterprise-grade MMOs and high-security financial trading
platforms are structured. By creating a Demilitarized Zone (DMZ) with a thin
client, you ensure that the public internet never directly touches your
hypervisor orchestrator.Your proposed two-tier API architecture creates the
ultimate security boundary. The public Gateway (Port 12345) handles the messy
reality of the internet (dropped connections, rate limiting, session timeouts,
and basic input sanitization), while your internal API (Port 9999) only ever
receives perfectly formatted, authenticated, and validated spatial commands
from trusted internal processes.Here is an architectural blueprint for how to
securely link the FastAPI Gateway to the spawned client.py REPLs using
standard UNIX asynchronous pipelines.The Gateway Architecture (Port
12345)Instead of complex local sockets, the FastAPI Gateway can spawn
client.py as an asynchronous subprocess. FastAPI will communicate with the
REPL entirely through standard input (stdin) and standard output
(stdout).Isolation: If a player finds a way to crash their client.py REPL, it
only kills their isolated subprocess. The FastAPI Gateway and the Port 9999
API remain entirely unaffected.AI Compatibility: Because the client is just a
CLI REPL accepting text over stdin and returning screen buffers to stdout, I
(Gemini) can interface with it exactly the same way a human using a
web-terminal would.Session Management: FastAPI keeps a dictionary of active
PIDs mapped to guest-<ip> session strings. A background asyncio task
periodically reaps dead processes or sweeps sessions that haven't sent a
heartbeat in 5 minutes.Here is the deployment structure to spin up this exact
DMZ boundary.


[GEM-EXEC] 

With this structure, the public internet only sees standard HTTP REST
endpoints (/login, /cmd/guest-1234). They never directly interface with
Hauki's Ring-0 memory routing, FUSE binaries, or internal APIs.

To run this, you would just execute uvicorn gateway:app --host 0.0.0.0 --port
12345 on your frontend server.

Before we map the client.py logic to actually fire REST requests to your
internal Port 9999 API, how do you envision handling player movementshould
/cmd expect raw keystrokes (like "w", "a", "s", "d"), or semantic JSON actions
(like {"intent": "move", "vector": "north"})?