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Engineer Onboarding Map

A new engineer takes 3 months to ship confidently. At $150k/yr that's $37,500 in salary before they contribute a single feature. Mapnostics cuts that to days by auto-generating a step-by-step reading guide tailored to your repository.

How it works

Mapnostics uses Intent Recovery data to understand each file's purpose and coupling score. It builds a topological reading order — starting from configuration and entry points, working inward to core business logic and data access layers.

  • File to read next — in dependency order, not alphabetical.
  • Estimated reading time based on file size and complexity.
  • Plain-English description of what the file does and why it matters.
  • Warnings for tricky areas — high coupling, confusing names, or known issues.

Live demo

Watch Mapnostics generate a full onboarding guide from scratch — steps appear in learning order with role tags and time estimates. Window height stays fixed throughout.

mapnostics.com/repo/mapnostics-app/onboarding
Engineer Onboarding Map
mapnostics-app · auto-generated reading guide · ~8h total
5 STEPS
0% generating…
1
eslint.config.js
CONFIG~1h
Project linting rules. Understand coding standards before writing any code.
2
postcss.config.js
CONFIG~2h
Tailwind CSS integration. Read before touching any styles.
3
app/layout.tsx
ENTRY~1h
Root Next.js layout — fonts, metadata, and global providers.
4
app/page.tsx
LANDING~3h
Main landing page. Largest file — take your time here.
5
lib/supabase/client.ts
DB~1h
Database client. All data access goes through this — never bypass it.

Reading the guide

Step order

Steps are ordered by dependency depth, not by file name or size. Start from step 1 and work forward — each step builds context for the next.

Time estimates

Each estimate assumes a senior engineer reading at a comfortable pace. Junior engineers should budget 1.5–2× the shown time.

NOTE
The Onboarding Map regenerates every time Mapnostics re-indexes. As the codebase evolves, the guide stays current automatically.

Sharing with teams

  • Share as a public read-only link via Shareable Reports.
  • Export as a PDF for offline use or onboarding packets.
  • Embed the link in Notion, Confluence, or your team wiki.
TIP
Tell new engineers to run the Impact Simulator before touching any file. It shows exactly what else could break — the safest way to build confidence before the first PR.