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How to map an unfamiliar repository before reading code with Compass

Build a local graph and read a generated architecture summary of communities and key nodes.

Short answer: Install the CLI with the installer for your system, for example curl --proto '=https' --tlsv1.2 -LsSf https://github.com/crabbuild/compass/releases/latest/download/install.sh | sh on macOS or Linux; then cd your-project; compass init. All steps.

Who it is forA developer who has just joined a project or inherited a large codebase and needs orientation before making changes.

The problemReading files one by one is slow, and it is hard to see subsystem boundaries and the most connected parts of the code.

The outcomeA compass-out folder with a graph, an architecture report, and an interactive HTML view that shows how the repository is organized.

What you need first

  • A terminal on macOS, Linux, or Windows
  • A local project folder or Git repository to analyze
  • Rust 1.97.1 or newer only if you build from source

Steps

  1. Install the CLI with the installer for your system, for example curl --proto '=https' --tlsv1.2 -LsSf https://github.com/crabbuild/compass/releases/latest/download/install.sh | sh on macOS or Linux. (inferred, check the README)
  2. cd your-project
  3. compass init
  4. Open compass-out/GRAPH_REPORT.md to read the architecture and community summary.
  5. compass export html

Prompt for your agent

In the project at <project path>, run `compass init` using the crabbuild/compass CLI, then read compass-out/GRAPH_REPORT.md and list the main communities and the most connected (god) nodes. Expected output: a short architecture summary with community names and their key symbols. Verify that compass-out/graph.json exists before reporting.

Caveat. Compass writes its output to compass-out/ inside the project, so check that folder before committing or sharing the project.

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