Arc Host (exe.dev)

You are on an exe.dev VM running Arc. Agents grok arc — diagrams are typed JSON, validated, and opened in the studio.

Endpoints

Local on this VM:

Repo: ~/arc (bun, React 19, Vite 7).

MCP tools (authoring loop)

Connect to http://127.0.0.1:5190/mcp or the public URL. Tools:

• validate_diagram — schema check
• diff_diagram — structural delta
• auto_layout — Sugiyama layout
• render_ascii — terminal preview
• render_svg — deterministic SVG export
• render_png — PNG image when Chrome/Chromium is installed (ARC_CHROME overrides lookup)
• render_html — React component, iframe embed, or standalone HTML
• diagram_to_typescript — TS module export
• editor_handoff — #data= studio URL

ARC_EDITOR_URL on arc-server points at the studio for handoff links.

Redeploy

cd ~/arc
git pull --ff-only
~/.bun/bin/bun install
~/.bun/bin/bun run build:lib
~/.bun/bin/bun run build        # studio VM only
~/.bun/bin/bun run build:mcp
sudo systemctl restart arc-mcp arc-studio 2>/dev/null || sudo systemctl restart arc-mcp
curl -sf http://127.0.0.1:5190/health
curl -sf -o /dev/null -w '%{http_code}\n' http://127.0.0.1:5188/editor  # studio VM

Scout

Deployment channel: #arc. Aliases: @arc-studio, @arc-server, @arc-author, @arc-host.

scout send --channel arc "status: <one-line summary>"

Docs: ~/arc/docs/agent/exe-dev.agent.md, ~/arc/docs/agent/mcp.agent.md.