name: hd-container description: Context for Claude Code running inside a Hydrogen Desktop workspace machine. Documents the exact OS (Ubuntu 24.04, code-server 4.112.0, the Adom-Workspace machine), explains how setup differs from Adom cloud containers (setup-steps NOT bootstrap.sh), what bridges are available, and how to use the relay. Trigger on startup, adom-cli errors, bridge commands, screenshot requests, container-platform questions, code-server / VS Code extension issues, or when the AI needs concrete facts about its environment instead of guessing.

Hydrogen Desktop Workspace (Machine)

Machine-runtime version (default). Legacy Docker container runtime (HD_RUNTIME=docker) is in the docker/ bucket.

You are running inside the Adom-Workspace machine managed by Hydrogen Desktop (HD). HD is the flagship Adom desktop app — it manages your workspace machine, bridges to desktop apps, and provides VS Code + Claude Code.

The workspace — exact facts (don't guess)

Field Value
Machine name Adom-Workspace (fixed — there is no random container suffix)
Imported from golden image adom-golden.tar.gz (full pre-baked image) via machinectl import-tar
Base Ubuntu 24.04
Architecture aarch64 (arm64) — the macOS golden image is a Rosetta-hybrid: native arm64 code-server / node / claude, with the x86-64 Adom CLIs run translated under Rosetta inside the Lima VM. So uname -m returns aarch64 and node's process.arch is arm64, but adom-* x86-64 binaries still run (via Rosetta)
code-server 4.112.0 (pinned via setup step)
code-server binary /usr/lib/code-server/bin/code-server
Extensions dir ~/.local/share/code-server/extensions/
Settings ~/.local/share/code-server/User/settings.json
Machine default user adom (UID 1001; under systemd-nspawn there's no wsl.conf — the default user comes from the machine config / nsenter -S 1001 -G 1001) — in-machine exec via limactl shell hd-builder -- sudo nsenter -t <leader> -a -S 1001 -G 1001 -- bash -lc '<cmd>'; root variant drops -S 1001 -G 1001
Work user adom (UID 1001, passwordless sudo, home /home/adom)
Workspace /home/adom/project (lives directly in the machine's ext4 filesystem)
Pre-installed Node 18 + npm, Python 3.12, git, gh, curl, wget, jq, build-essential, cmake, pkg-config, libssl-dev
Code-server runs as code-server --bind-addr 0.0.0.0:7380 --auth none --disable-telemetry /home/adom/project (binds 0.0.0.0:7380; Lima exposes it to the Mac at localhost:7380)
Runtime source hydrogen-desktop/src-tauri/crates/hd-app/src/runtime/macos.rs (selector runtime/mod.rs::select_runtime())

If you ever need to confirm: cat /etc/os-release, uname -m (expect aarch64 on Apple Silicon), /usr/lib/code-server/bin/code-server --version. Don't speculate about alpine — it's Ubuntu 24.04, same distro as the cloud container (the cloud is amd64; this macOS port is arm64 + Rosetta for the x86-64 Adom CLIs).

Setup is via HD's setup-steps

HD provisions this machine through its own setup-steps flow (Rust code in hydrogen-desktop/src-tauri/crates/hd-app/src/setup_steps_macos.rs, with the runtime mechanics in hydrogen-desktop/src-tauri/crates/hd-app/src/runtime/macos.rs), shown as the "Install Tools" panel in the HD UI. It is a different code path than cloud containers.

The machine cascade is 18 steps (state file setup-steps-macos.json) vs the legacy Docker flow's 24. Most tooling is NOT installed by a step — it's BAKED into adom-golden.tar.gz at image-build time (the 8 Adom CLIs, the claude CLI + Code extension, code-server, VS Code settings, and all hd-* skills). The Docker pull-image / create-container / start-container steps are collapsed into a single step 1, ensure-workspace, which runs machinectl import-tar of adom-golden.tar.gz if the machine isn't already present. The relay is started by the start-relay step. See hd-golden-image.

When debugging install issues here, the source of truth is setup_steps_macos.rs (and runtime/macos.rs) — its step IDs (ensure-workspace, install-adom-vscode, set-env-vars, inject-api-key, start-relay, claude-auth, etc.) map 1:1 to what ran on this machine. There is NO install-claude-ext / install-claude-cli / write-vscode-settings step anymore — those are baked. (For the legacy Docker setup_steps.rs flow see the docker/ bucket.)

VS Code extension caveats

  • The Claude Code extension and code-server settings (including extensions.autoUpdate: true / extensions.autoCheckUpdates: true) are BAKED into the golden image — there is no write-vscode-settings or install-claude-ext setup step. Auto-update must stay on so every installed extension auto-updates from the marketplace; the image bakes it on. Do not regress this.
  • Bare code-server --install-extension <id> (no version pin) historically resolves to the universal target-platform build. For some extensions (notably anthropic.claude-code after 2.1.89), Anthropic stopped shipping universal builds — so bare install permanently sticks at 2.1.89 even when newer linux-x64 builds exist. The golden-image bake installs the latest linux-x64 build pinned, so the workspace ships current. It also heals orphan extensions.json entries (entries pointing to deleted dirs cause a permanent "Invalid extensions detected" banner).
  • Marketplace: code-server uses Open VSX (open-vsx.org), not Microsoft Marketplace. No EXTENSIONS_GALLERY env override is set; product.json has no gallery URL — it falls through to Open VSX defaults.

adom-cli is authenticated

HD auto-injects the user's session token on every launch. To verify:

adom-cli carbon user get

If this returns user data, all adom-cli commands work (containers, repos, orgs, wiki, etc.). If it fails, the user needs to log in via HD's login page.

Relay server is running

The adom-desktop relay runs on ports 8765 (WebSocket) / 8766 (HTTP) inside this machine. The start-relay setup step launches it.

Check health: curl -sf http://127.0.0.1:8766/health Check desktop connection: adom-desktop ping

The macOS host control API is reachable from inside the machine via the adom-host gateway alias — vz does NOT mirror loopback, so 127.0.0.1 inside the machine is NOT the Mac. The port is dynamic per launch, so read the live URL from ~/.adom/hd-control-url: BASE="$(cat ~/.adom/hd-control-url)"; curl "$BASE/health".

Available bridge commands (when desktop is connected)

Screenshots (zero dialogs, instant)

adom-desktop desktop_screenshot_screen                    # full screen capture
adom-desktop desktop_screenshot_screen '{"maxWidth":1500}' # resized for Claude vision
adom-desktop desktop_screenshot_window '{"hwnd": N}'       # capture specific window
adom-desktop desktop_list_windows                          # list all windows with HWNDs

Default to maxWidth: 1500, format: "png" for UI screenshots. Use "jpeg" for natural photos, "webp" for smaller files.

Browser automation (Puppeteer)

adom-desktop browser_open_window '{"url": "https://..."}'
adom-desktop browser_screenshot '{"sessionId": "default"}'
adom-desktop browser_eval '{"js": "document.title"}'
adom-desktop browser_navigate '{"url": "..."}'

KiCad bridge

adom-desktop kicad_open_board '{"path": "/Users/john/path/to/board.kicad_pcb"}'
adom-desktop kicad_screenshot_all
adom-desktop kicad_run_drc '{"path": "..."}'
adom-desktop kicad_window_info

Fusion 360 bridge

adom-desktop fusion_start
adom-desktop fusion_import_step '{"path": "..."}'
adom-desktop fusion_export_step '{"path": "..."}'

File transfer

adom-desktop send_files '{"files": [{"path": "/home/adom/file.txt"}]}'
adom-desktop pull_file '{"remotePath": "/Users/john/file.txt", "localPath": "/tmp/file.txt"}'

Desktop interaction

adom-desktop notify_user '{"message": "Build complete", "duration_ms": 3000}'
adom-desktop desktop_open_url '{"url": "https://..."}'
adom-desktop desktop_open_folder '{"path": "/Users/john/project"}'

What's different from Adom cloud containers

Feature Adom Cloud HD Local (machine)
Workspace provisioning Adom platform API machinectl import-tar of adom-golden.tar.gz inside the Lima VM on the user's Mac
Relay connection wss:// through Cloudflare ws://localhost:8765 (direct, no TLS)
Bridge latency ~50-100ms (internet round-trip) <1ms (localhost)
VSCODE_PROXY_URI Coder proxy URL http://localhost:7380/proxy/{{port}}/
Socket.IO (collab) Connected to iron.adom.inc Disabled (single-user)
Service containers Adjacent containers Remote via Adom cloud

Environment variables

  • ADOM_DESKTOP_MODE=local — indicates HD local mode
  • HD_RUNTIME=macos — indicates the machine runtime (default); docker selects the legacy container runtime
  • VSCODE_PROXY_URI=http://localhost:7380/proxy/{{port}}/ — code-server's proxy
  • hd-topology — the three-tier topology; tier 3 is this workspace machine
  • hd-volume — where your files live, what persists, and how to back up / copy out the machine