docs(claude): host-agent reality — active Rust crate, tag scheme, runner container truth, command corrections

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CLAUDE.md

@@ -55,7 +55,12 @@ frontend/                    # Vue 3 + TypeScript
   package.json
   vite.config.ts             # Proxies /api to :3000
 
-companion-agent/             # Go binary for bare metal servers
+corrosion-host-agent/        # Rust host agent (ACTIVE) — multi-game ops runtime
+  src/                       # main, config, bus (NATS), telemetry, prober, hostcmd
+  PROTOCOL.md                # Wire protocol v2 spec (instance-scoped subjects)
+  agent.example.toml         # Multi-instance config reference
+
+companion-agent/             # Go binary (LEGACY — behavior reference until Rust parity)
   cmd/agent/                 # main.go entry point
   internal/                  # Core agent logic (nats, commands, process)
   Makefile                   # Build for Linux/Windows
@@ -91,14 +96,16 @@ cd backend-nest && npx tsc --noEmit    # Type-check without building
 
 # Frontend
 cd frontend && npm run dev             # Vite dev server (port 5174)
-cd frontend && npm run build           # Production build → dist/
-cd frontend && npm run lint            # ESLint
-cd frontend && npm run type-check      # TypeScript checking (vue-tsc)
+cd frontend && npm run build           # vue-tsc -b && vite build (type-check included; no separate lint/type-check scripts exist)
 
-# Companion Agent (Go)
+# Host Agent (Rust — ACTIVE)
+cd corrosion-host-agent && cargo check                                                 # Fast validation
+cd corrosion-host-agent && cargo build --release --target x86_64-unknown-linux-musl   # Static Linux binary
+cd corrosion-host-agent && cargo xwin build --release --target x86_64-pc-windows-msvc # Windows (local)
+# CI: push tag agent-vX.Y.Z (must match Cargo.toml version) → Asgard builds → CDN /host-agent/alpha/
+
+# Companion Agent (Go — LEGACY, behavior reference until Rust parity)
 cd companion-agent && make build       # Build for current platform
-cd companion-agent && make linux       # Cross-compile for Linux
-cd companion-agent && make windows     # Cross-compile for Windows
 
 # Docker (from docker/ directory — Commander ALWAYS builds with --no-cache)
 docker compose build --no-cache && docker compose up -d  # Full rebuild + start
@@ -374,7 +381,8 @@ Default to Sonnet. Escalate to Opus when the problem demands it, not as a comfor
 - Treat every change as production deployment (`corrosionmgmt.com`)
 - Document why, not just what, in commits and CHANGELOG
 - **Always commit and push when done touching code — never ask, never wait for permission**
-- **Tag companion agent builds when Go code in `companion-agent/` is modified** — increment from latest tag (currently v1.0.3), push tag to trigger CI build + CDN upload
+- **Tag agent builds when agent code is modified** — Rust agent: `agent-vX.Y.Z` (must match `corrosion-host-agent/Cargo.toml`; CI publishes to CDN `/host-agent/alpha/`, while `/latest/` stays on the Go build until cutover). Legacy Go agent: `vX.Y.Z`. Tags roll FORWARD only — never reuse or re-push a tag; cut the next version
+- **The Asgard CI runner executes jobs in a bare `node:20-bullseye` container** — no Rust/Go/Docker/sudo preinstalled; workflows must bootstrap toolchains per-run (setup-go, rustup via curl)
 
 ## Development Notes