Zone reads your actual repo, generates code patches, and shows you a full diff with confidence scores — before touching a single file. No hallucinated paths, no invented files. Three roles: Developer (patches, refactors), Test Engineer (Playwright, Cypress, pytest), and Data Analyst (SQL migrations). Describe a task in plain English → review the diff → apply. Free: 10 runs/month. Pro: $9/mo for 1000 runs.