The first week on a new codebase is mostly searching
You grep for a function name, land in a file you do not recognize, trace three imports, realize you are in a deprecated module, start over. Most onboarding time is spent building a mental map that already exists in someone's head but was never written down.
Onevium accelerates this by letting you ask questions against the live codebase. Point the agent at a directory, ask how a request flows through the system, and get a structured walkthrough — modules, validation points, side effects, and the files you should read next.
Go deeper with follow-up questions
The first answer is a starting point, not a conclusion. Keep asking until you are confident enough to make changes.
- Which module owns the business logic versus the transport layer?
- Where does input validation happen, and what assumptions does downstream code rely on?
- What background jobs or event handlers could be affected by a change here?
- Which tests should pass before this change ships?
Combine with browser automation for full-stack tracing
For web applications, pair codebase exploration with browser automation. Ask the agent to open the running app, trigger a specific flow, capture the network requests, then trace those endpoints back through the source code. You get the full picture — from button click to database query — in a single session.