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Install ArcSight

Install once. Run arc impact on the file you are about to change. Median time to first result: under 3 minutes.

Quickstart

Two commands — install, then run impact on the file you are about to change.

1. Install

npm install -g arcsight

2. Impact

arc impact src/api/UserController.ts

Requirements

Node.js 18 or later
npm or yarn
TypeScript or JavaScript project

What you get

Structured impact output: risk level, blast radius, affected contracts, and warnings — or a refused analysis when evidence is insufficient. Source stays on your machine.

Example analysis →TTFC methodology →Homepage demo →