RepoAtlasCandidate Brief Generator
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Repository walkthrough interview guide

How to walk an interviewer through a repository.

Start with a clear route through the code, not a list of folders. Show where control enters, how one important path crosses the system, which files support your claims, and where the evidence stops.

Interview prompt
"Where would you start, and how does this system fit together?"
  1. README + manifestorient
  2. entry pointfollow control
  3. module boundaryexplain responsibility
  4. tests + CIshow the proof

What the interviewer is evaluating

Your judgment matters more than file recall.

A strong walkthrough shows that you can reduce an unfamiliar codebase into a useful mental model. The interviewer is listening for how you choose a starting point, how you distinguish evidence from inference, and how you communicate tradeoffs without claiming more than the repository proves.

The first ten minutes should establish one coherent path. You can widen the discussion after the interviewer can see the system through that path.

The first ten minutes

Use a reading order you can explain.

Each step should answer a question the previous step created. That turns repository exploration into a reasoned sequence instead of a tour.

  1. 01

    Minute 0-2

    Orient from the repository contract

    README, manifest, config

    Start with the stated purpose, supported commands, dependencies, and environment shape. Treat documentation as a claim to verify against the files, not as proof of runtime behavior.

  2. 02

    Minute 2-4

    Find the likely entry point

    main, app, index, routes

    Use scripts, framework conventions, and executable declarations to locate where control probably enters. Say likely until a file or command makes the entry explicit.

  3. 03

    Minute 4-7

    Trace one representative path

    entry to boundary to output

    Follow one request, command, or event through the modules it touches. A narrow path is easier to defend than a tour of every folder.

  4. 04

    Minute 7-9

    Check the safety net

    tests, CI, contribution docs

    Look for the tests nearest that path, the commands CI runs, and the guidance a contributor would follow. These files show how the repository expects changes to be checked.

  5. 05

    Minute 9-10

    Mark what remains unknown

    gaps, warnings, follow-ups

    Separate what the files show from what you infer. Name the runtime or product questions you would ask rather than filling the gaps with a confident guess.

Explain the architecture

Trace responsibility, not every dependency.

Architecture is the path between meaningful boundaries. Pick one representative request, event, or command and explain how responsibility changes as it moves.

Entry

Where does control first enter?

Application bootstrap, route, CLI command, or executable declaration

Boundary

Where does responsibility change hands?

Module imports, package edges, adapters, controllers, or service interfaces

State

Where does information persist or leave the system?

Database clients, stores, caches, files, or external integrations

Proof

Which files support this explanation?

Tests, CI workflows, manifests, and configuration

Keep every claim defensible

Label what you know.

This language keeps a walkthrough precise when static files cannot answer runtime or product questions.

Observed
"The package script starts src/index.ts."

Use when a file directly supports the statement.

Inferred
"This import path suggests the request crosses into the service layer."

Use when structure supports a bounded interpretation.

Unknown
"Static files do not show which branch receives production traffic."

Use when the repository cannot prove the answer.

A real bundled example

Turn the method into something you can say.

This excerpt comes from the same deterministic sample analysis the product opens.

30-second walkthrough
Next.js application: Tiny App. Start at src/app/api/health/route.ts, validate with npm run dev.
Read firstsrc/app/api/health/route.ts

Next.js route handler; detected entrypoint

Architecture evidence

8 nodes and 5 edges detected from supported import/dependency analysis.

Prepare for the follow-up

What makes `src/bootstrap.ts` a danger zone in this codebase?

Top risk-ranked file with measurable breakdown.

Compare the method with the exact-commit FastAPI Candidate Brief. RepoAtlas reads repository files as text. It does not execute code or call AI. It provides deeper analysis for TypeScript/JavaScript, Python, and Java, and keeps confidence gaps visible.

Risks, tradeoffs, and improvements

End with the next useful question.

Treat large, highly connected, or lightly tested files as places to inspect, not as confirmed defects. Describe the structural signal, point to the supporting file, and say what you would verify before changing anything.

Discuss a tradeoff only when a manifest, configuration file, interface, or dependency boundary shows the technical choice. The files may show what was selected, but they do not prove maintainer intent, rejected alternatives, or production impact.

30 seconds: purpose, entry point, one system path, one evidence limit.

2 minutes: add architecture boundaries, a risk signal, the test path, and one improvement question.