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-# ZeroLagHub – Infrastructure Architecture
-
-## Three-Layer Model
-
-The platform is organized into three distinct layers.
-
-```
-Control Plane  →  Edge / Gateway  →  Runtime
-```
-
-This separation ensures that customer workloads cannot affect platform
-availability, and that the platform can always manage the runtime even
-if the runtime is degraded.
-
----
-
-## Layer 1 — Control Plane (Core Host)
-
-Mission critical. Must never go down or the platform is dead.
-
-Low CPU usage but high availability requirement.
-
-Components:
-
-- `zpack-api` — platform API
-- `zpack-portal` — Next.js frontend
-- MariaDB — primary database
-- Redis — cache + agent state
-- Technitium DNS (`zlh-dns`)
-- Prometheus/Grafana monitoring (`zlh-monitor`)
-- PBS backup (`zlh-back`)
-- Headscale (`zlh-ctl`) — dev access VPN
-- `zlh-proxy` — Traefik for core/portal SSL termination
-- core OPNsense
-
-Rule: **Control plane must never depend on runtime.**
-
----
-
-## Layer 2 — Edge / Gateway Layer
-
-Handles incoming traffic routing. Sits between internet and runtime.
-
-Components:
-
-- `zlh-zpack-proxy` — Traefik for game/dev runtime traffic
-- `zlh-velocity` — Minecraft Velocity proxy
-- game/dev OPNsense (`zlh-zpack-router`)
-
-The two Traefik instances map cleanly to this split:
-
-| Instance | Routes |
-|----------|--------|
-| `zlh-proxy` (core) | portal, API, monitoring, Headscale |
-| `zlh-zpack-proxy` (runtime) | game servers, dev IDE (future) |
-
-Velocity belongs with runtime — proxying game traffic locally avoids
-cross-host latency.
-
----
-
-## Layer 3 — Runtime Layer (Runtime Host)
-
-Customer workloads. Noisy and unpredictable. Isolated from control plane.
-
-Components:
-
-- game containers
-- dev containers
-- zlh-agent (inside every container)
-- build systems
-- `zlh-artifacts` — runtime binaries + server jars
-
-Rule: **Runtime must not be able to break control plane.**
-
----
-
-## Host Placement
-
-### Core Host (small, stable)
-
-```
-core OPNsense
-zlh-proxy (Traefik — core traffic)
-zpack-api
-zpack-portal
-MariaDB
-Redis
-zlh-dns (Technitium)
-zlh-monitor (Prometheus/Grafana)
-zlh-back (PBS backup)
-zlh-ctl (Headscale)
-```
-
-### Runtime Host (large, beefy)
-
-```
-game-dev OPNsense
-zlh-zpack-proxy (Traefik — runtime traffic)
-zlh-velocity (Minecraft proxy)
-game containers
-dev containers
-agents
-build systems
-zlh-artifacts
-```
-
----
-
-## Agent Communication Path
-
-API → agent crosses the host boundary via management network.
-
-```
-Core Host (API)
-  ↓ management network
-Runtime Host
-  ↓
-agent :18888 inside container
-```
-
-Firewall rule: only API (core host) may reach agent ports (:18888) on
-runtime host. No other source should be able to reach agents directly.
-
----
-
-## Failure Isolation
-
-If runtime host degrades or goes down:
-
-- control plane stays up
-- operators can still login, manage servers, redeploy containers
-- platform is degraded but not dead
-
-If core host degrades:
-
-- runtime containers continue running
-- game servers stay up
-- management capability is lost until core recovers
-
----
-
-## VMID Allocation Scheme
-
-Block-based allocation makes the Proxmox UI readable and automation
-predictable. Container role is derivable from VMID range.
-
-| Range | Purpose |
-|-------|---------|
-| 100–199 | Core infrastructure |
-| 200–299 | Base templates |
-| 300–399 | Network / proxy services |
-| 1000–1099 | Game containers |
-| 1100–1199 | Dev containers |
-| 2000+ | Monitoring / backup |
-
----
-
-## Design Principles
-
-1. Control plane never depends on runtime
-2. Runtime cannot break control plane
-3. Management network is the only path from core to runtime agents
-4. Two Traefik instances — one per traffic domain — is correct
-5. Velocity stays with runtime to keep game traffic local
-6. VMID ranges communicate role without lookup