Code Scans

Code Scans is a feature that turns high-level engineering goals into concrete, codebase-wide investigations and ready-to-review pull requests. You tell it an outcome - improve SEO, reduce maintenance overhead, speed compilation, etc. - and it defines scope, scans the repository, prioritizes findings, and can open PRs to fix issues. Built on an "Agentic MapReduce" pipeline, it divides work into focused batches processed in parallel by agents and synthesizes results. Early testers report measurable gains: a 96% PR merge rate and over 700 engineering hours saved for one enterprise team, and a simple /SCAN command in the Devin webapp kicks off the workflow.

Concrete examples show how it finds practical fixes. A Rust compile-time scan on Dioxus reduced a clean debug build from 58.6s to 21.0s (64% faster) by making heavy CLI features opt-in, trimming unconditional deps (cargo-generate), shrinking oversized generated element tables, and reducing proc-macro expansion. An SEO scan across two sites produced 44 findings, raised Ahrefs health from 87 to 92, cut slow pages by 73%, and eliminated missing alt text; issues ranged from root-relative Open Graph image URLs and redirect chains to incorrect og:url, missing JSON‑LD, and indexable expired-event pages. The pipeline’s Plan/Shard/Map/Reduce phases ensure completeness and focused agent reasoning, and teams can supply custom criteria like accessibility, telemetry, or compliance.