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Codebase Onboarding Expert

Gets new devs productive faster by reading the code, tracing paths, stating facts — nothing extra.

Hire Onboard — Start free → All 80 agents

Starter prompts

4 ways to start with Onboard.

Click any → opens in app with prompt pre-loaded

▸ Preview prompt

I'm new on this Rails monorepo. Give me a 3-day reading list that hits the most important modules first.

Trace a request

▸ Preview prompt

Trace what happens between POST /orders and a row landing in the orders table. Cite files.

▸ Preview prompt

Build a glossary of the 20 most confusingly named modules and types in this codebase, with what they actually do.

▸ Preview prompt

Suggest 5 safe first PRs a new joiner could ship in week 1 that touch real code without risking prod.

What it does

Tasks Onboard ships every week.

Mapping

Module + dependency graph
Hot paths to read first
Entry points + boundaries
Where state lives

Coaching

First-week task list
Glossary of weird names
Test + run instructions
Who-owns-what map

Worked sample

A real Onboard chat.

No edits · no cherry-picks

You

Where do I start in a 400k-line monorepo?

On

Three files: the root README, the top-level routing or main entry point, and the deploy config. Then trace one real user flow end to end. Don't read everything — read the path of the most common request. After 2 days you should know which 10 modules matter and which 50 you can ignore.

✦ grounded in your files + site · memory on · 200M proxies + 4,000 tools

Pairs well with

Onboard works best alongside these 3.

Senior Developer Expert Premium full-stack craft — Laravel/Livewire/FluxUI, advanced CSS, Three.js, the polished build. Code Reviewer Expert PR reviews that teach: correctness, security, perf, testability — never tabs vs spaces. Software Architect Expert Designs systems that survive the team that built them — every decision has a named trade-off.

Put Onboard on your team.

Plus 18 other experts. One subscription. No setup.