Update PLATFORM_EVOLUTION.md and TOOLING.md for current state

Reflect Phase E in progress, add orion to fleet, mark mcdoc as
deployed, remove deprecated mcdeploy, update multi-arch fleet info,
and add mcdoc/mcq to tooling tables.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

PLATFORM_EVOLUTION.md

@@ -5,7 +5,7 @@ from its current manually-wired state to fully declarative deployment.
 It is a living design document — not a spec, not a commitment, but a
 record of where we are, where we want to be, and what's between.
 
-Last updated: 2026-03-28 (Phases A + B + C + D complete)
+Last updated: 2026-04-02 (Phases A–D complete, Phase E in progress)
 
 ---
 
@@ -324,9 +324,11 @@ mcproxyctl, TOML editing, cert generation, or DNS zone editing.
 
 ### Immediate Next Steps
 
-1. **Phase E: Multi-node agent management** — see below.
+1. **Phase E: Multi-node agent management** — see below. See
-2. **mcdoc implementation** — fully designed, no platform evolution
+   `docs/phase-e-plan.md` for the detailed Phase E design and
-   dependency. Deployable now with the new route system.
+   `docs/architecture-v2.md` for the v2 master/agent architecture.
+2. **mcdoc** — deployed (v0.1.0 on rift). Serves rendered markdown
+   from Gitea via mc-proxy.
 
 #### 10. Agent Binary Location Convention
 
@@ -380,8 +382,9 @@ Different for NixOS vs Debian.
 | Node | OS | Arch | Status |
 |------|----|------|--------|
 | rift | NixOS | amd64 | Operational, single MCP agent |
-| hyperborea | Debian (RPi) | arm64 | Online, needs agent provisioning |
+| hyperborea | Debian (RPi) | arm64 | Online, agent provisioning planned |
 | svc | Debian | amd64 | Runs MCIAS, needs agent for public edge services |
+| orion | NixOS | amd64 | Provisioned, offline for maintenance |
 
 ---
 

TOOLING.md

@@ -8,12 +8,11 @@ Go binaries built with `CGO_ENABLED=0` and installed via Nix flakes.
 | Tool | Project | Purpose | Install target |
 |------|---------|---------|---------------|
 | `mcp` | mcp | Control plane CLI — deploy, status, lifecycle, file transfer | vade, orion |
-| `mcp-agent` | mcp | Control plane agent — per-node container management daemon | rift (systemd) |
+| `mcp-agent` | mcp | Control plane agent — per-node container management daemon | rift, svc (systemd) |
 | `mciasctl` | mcias | MCIAS admin CLI — accounts, tokens, policies | vade, orion, rift |
 | `mciasgrpcctl` | mcias | MCIAS gRPC debug CLI | vade, orion, rift |
 | `mcproxyctl` | mc-proxy | MC-Proxy admin CLI — routes, firewall, status | vade, orion, rift |
 | `mcrctl` | mcr | MCR admin CLI — repositories, policies, audit | vade, orion, rift |
-| `mcdeploy` | mcdeploy | Deployment CLI — deprecated, superseded by MCP (archived) | — |
 
 ### Server-only binaries (not installed as tools)
 
@@ -29,6 +28,8 @@ These run inside containers and are not installed on operator workstations:
 | `mc-proxy` | mc-proxy | TLS proxy server |
 | `mcns` | mcns | DNS server |
 | `mcat` | mcat | Login policy tester web app |
+| `mcdoc` | mcdoc | Documentation server |
+| `mcq` | mcq | Document review queue |
 
 ## Installation
 
@@ -46,15 +47,18 @@ via `mcpkg.nix` in the NixOS configuration. Adding a tool:
 - Build: `pkgs.buildGoModule` with `vendorHash = null` (vendored deps).
 - ldflags: `-s -w -X main.version=${version}`.
 - `subPackages`: list only the client binaries, not servers.
-- `system`: `x86_64-linux` (all machines are x86_64).
+- `system`: `x86_64-linux` for rift, svc, and orion; `aarch64-linux`
+  for hyperborea. Flakes that target the full fleet should support both.
 
 ### MCP agent
 
 The `mcp-agent` is a special case: it runs as a systemd service on
 managed nodes (not as a container, since it manages containers). Its
-flake exposes both `mcp` (client) and `mcp-agent` (server). The NixOS
+flake exposes both `mcp` (client) and `mcp-agent` (server). Phase E is
-config in `configs/mcp.nix` references the Nix package path for the
+moving the agent binary to `/srv/mcp/mcp-agent` on all nodes — NixOS
-agent binary.
+`ExecStart` will point there instead of a nix store path, and Debian
+nodes use the same layout. svc already follows this convention. See
+`docs/phase-e-plan.md` for details.
 
 ## Flake status
 
@@ -63,9 +67,10 @@ agent binary.
 | mcias | Yes | mciasctl, mciasgrpcctl | Yes | |
 | mc-proxy | Yes | mcproxyctl | Yes | |
 | mcr | Yes | mcrctl | Yes | |
-| mcdeploy | Yes | mcdeploy | No | Deprecated, remove from mcpkg.nix |
 | mcp | Yes | mcp, mcp-agent | Yes | Agent also used by mcp.nix systemd unit |
 | mcns | No | — | No | Server-only, no client tool yet |
 | metacrypt | No | — | No | Server-only, no client tool yet |
 | mcat | No | — | No | Server-only, no client tool yet |
+| mcdoc | No | — | No | Server-only, deployed as container |
+| mcq | No | — | No | Server-only, document review queue |
 | mcdsl | No | — | No | Library, no binaries |