Arc Agent — AI skill for Claude Code
Go CLI using AI for structured system design documents, artifacts, and Mermaid diagrams.
How to install Arc Agent
This entry records only its repository, not the path inside it, so there is no
exact command to give. Open ariel-frischer/arc-agent and copy the folder into
~/.claude/skills/, or the file into ~/.claude/agents/.
What Arc Agent does
Go CLI using AI for structured system design documents, artifacts, and Mermaid diagrams.
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README
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**AI Generated Software System Design**
[](https://opensource.org/licenses/MIT) 
`arc-agent` is a Go CLI that uses AI to generate system design documents and diagrams. It runs each design stage through a non-interactive agent session or direct structured-output runner, validates the output, repairs failures, and renders reviewable Markdown and Mermaid diagrams.
The staged workflow is inspired by Hello Interview's [System Design in a Hurry](https://www.hellointerview.com/learn/system-design/in-a-hurry/introduction) guide, especially its focus on practical requirements navigation, trade-offs, and clear communication.

_Generated design workspace output: validated YAML, `DESIGN.md`, Mermaid, and Excalidraw._
Install
**macOS and Linux only.** Windows users should run the installer from WSL.
curl -fsSL https://raw.githubusercontent.com/ariel-frischer/arc-agent/main/install.sh | sh
The installer writes to `~/.local/bin` by default. If another `arc-agent` appears earlier on `PATH`, for example from `make install-global`, the installer will keep that binary untouched and print the direct path to the newly installed release.
Prerequisites
Core install gives you the `arc-agent` binary. Add only the tools for the path you use:
- Agent runner: OpenCode, Codex, or Claude Code CLI.
- Direct runner: OpenCode Go API key.
- Mermaid validation or SVG/PNG render: `mmdc`.
- Excal
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