Understand a repo

Orient to an unfamiliar repository with DNA, health, landmarks, and map.

Learn what a repository is built from, how healthy it looks, and where to start reading.

cd your-repo
prism doctor
prism dna
prism health
prism landmarks
prism map --zoom package

What you get back

DNA / stack — frameworks, domains (frontend, backend, data, infrastructure), confidence and evidence per signal.
Health — 0–100 score plus factors (parse health, tests, coupling, modularity, diagnostics). Higher is better.
Landmarks — entrypoints and anchors a human would open first.
Map — spatial layout at repo → package → feature → file → symbol.

When this is wrong

Doctor chose the wrong workspace → pass --workspace or set PRISM_WORKSPACE.
Low-confidence stack signals (dependency only) are leftovers, not active tooling — check the evidence.
Empty map / odd file counts → excludes or generated output; see troubleshooting.

Quickstart · DNA and stack · Repository index

Playground

Browser UI for trying Prism without installing an extension.

Before you edit

Check blast radius and test impact before changing unfamiliar code.

On this page

What you get back When this is wrong Related