---
type: system
name: pluto
display_name: Pluto (Claude-Builder)
last_compiled: 2026-05-24
compiled_by: DESKTOP-0O8A1RL/claude-main
sources:
  - .claude/machines/pluto.md
  - credentials.md
  - wiki/projects/gururmm.md
backlinks:
  - projects/gururmm
  - systems/jupiter
  - systems/gururmm-build
---

# Pluto (Claude-Builder)

## Identity
- **Hostname:** Pluto / Claude-Builder
- **IP:** 172.16.3.36
- **Role:** Windows MSI and cargo build server for GuruRMM — the only machine in the fleet that produces Windows agent binaries and WiX MSI installers
- **Location:** virsh VM on Jupiter (172.16.3.20), domain name "Claude-Builder"
- **OS:** Windows Server 2019 Standard
- **SSH user:** Administrator

## Specs

Windows Server 2019 VM. Exact vCPU/vRAM allocation managed via virsh on Jupiter — not documented separately.

## Services

Pluto is not a general-purpose server. It has no web services, no Claude Code, no vault, no coord API. It exists solely to run builds when `build-windows.sh` SSHes in.

## Access
- **SSH from gururmm-build (172.16.3.30):**
  ```bash
  ssh -o StrictHostKeyChecking=yes \
      -o UserKnownHostsFile=/opt/gururmm/pluto_known_hosts \
      Administrator@172.16.3.36
  ```
- **Known-hosts file:** `/opt/gururmm/pluto_known_hosts` — three pinned keys (RSA, ECDSA, ED25519) for 172.16.3.36. **Never use `StrictHostKeyChecking=no`** — a MITM would inject malicious binaries into MSI artifacts.
- **To update pinned keys** (e.g. after OS reinstall): `ssh-keyscan 172.16.3.36 > /opt/gururmm/pluto_known_hosts`
- **SSH from DESKTOP-0O8A1RL:** Uses a different network path than from gururmm-build — one failing does not imply the other fails.

## Build Tools

| Tool | Path |
|---|---|
| cargo (Rust stable 1.95.0) | `C:\Users\Administrator\.cargo\bin\cargo.exe` |
| cargo (Rust 1.77, legacy) | Pinned for legacy Windows 7/Vista targets; used with `--ignore-rust-version` |
| rustup | `C:\Users\Administrator\.cargo\bin\rustup.exe` |
| WiX 4 | `C:\Users\Administrator\.dotnet\tools\wix.exe` |
| sccache | `C:\sccache\` — compiler cache; near-instant rebuilds when source unchanged |
| Git | Standard PATH |
| Gitea clone | `C:\gururmm\` — pulled from `https://azcomputerguru@git.azcomputerguru.com/azcomputerguru/gururmm.git` |

## What Pluto Builds (in order, per trigger)

```
1. git pull (build-windows.sh does this via SSH before cargo)
2. cargo build --release --target x86_64-pc-windows-msvc          → stable x64
3. cargo build --features debug-agent --target x86_64-pc-windows-msvc  → debug x64
4. cargo build --release --target i686-pc-windows-msvc             → stable x86
5. cargo build --release --target x86_64-pc-windows-msvc (legacy profile, --ignore-rust-version) → legacy x64
6. cargo build --release --target i686-pc-windows-msvc  (legacy profile, --ignore-rust-version)  → legacy x86
7. wix build → GuruRMM-<version>-x64.msi
```

All five cargo runs are sequential. MSI is built after all binaries complete.

## Output Artifacts (on Pluto)

| Artifact | Path |
|---|---|
| Agent EXE (x64) | `C:\gururmm\target\x86_64-pc-windows-msvc\release\gururmm-agent.exe` |
| Agent EXE (x86) | `C:\gururmm\target\i686-pc-windows-msvc\release\gururmm-agent.exe` |
| Tray EXE | `C:\gururmm\target\x86_64-pc-windows-msvc\release\gururmm-tray.exe` |
| MSI | `C:\gururmm\target\wix\GuruRMM-<version>-x64.msi` |

`build-windows.sh` SCPs these to gururmm-build's `/var/www/gururmm/downloads/` after build completes.

## Build Trigger Rules

A Pluto build is initiated only when:
1. A push to `main` hits the Gitea webhook (172.16.3.30:9000)
2. `build-shared.sh` succeeds (version bump + git sync)
3. The diff between new SHA and `last-built-commit-windows` includes changes under `agent/` (excluding `agent/Cargo.lock`)

If only `server/`, `dashboard/`, or docs changed — Pluto is not contacted.

Windows build lock: `/var/run/gururmm-build-windows.lock` on gururmm-build prevents concurrent builds.

## Known Issues & Quirks

- **sccache makes short builds look like failures** — a 1-second Windows build is normal when `agent/` source hasn't changed since the last successful build. Do not interpret speed as failure.
- **Do not SSH to Pluto manually to trigger builds** — all builds go through the Gitea webhook pipeline. Manual SSH is for diagnostics only.
- **If Pluto appears unreachable from DESKTOP** — verify from gururmm-build (172.16.3.30) first. Different network paths; DESKTOP is not on the same LAN segment.
- **WiX MSI cannot be built on Linux** — WiX requires `msi.dll`. This is the sole reason Pluto exists.
- **`path.find('\\')` in `#[cfg(windows)]` files** — a literal backslash in a char literal compiles silently on Linux but fails with "unterminated char literal" on Pluto's MSVC build. Use `'\\\\'` instead.

## Backlinks

- [[projects/gururmm]] — Pluto is the exclusive Windows MSI build machine for GuruRMM
- [[systems/jupiter]] — Pluto is a virsh VM hosted on Jupiter
- [[systems/gururmm-build]] — build-windows.sh on gururmm-build SSHes here to trigger builds