Understand your codebase with DeepWiki

Before you hand off any task, understand the code first. DeepWiki is autogenerated, continuously-refreshed documentation for your indexed repos, like a senior engineer who already knows the repo walking you through it. Use it to onboard in hours instead of weeks, and to sanity-check an ask before you delegate.

It gives you four ways to look at your codebase, matching the four questions you ask about unfamiliar code: architecture maps (what are the big pieces and how do they fit), symbol docs (what does this function actually do, linked to source), codemaps (what happens when a user does X, traced across files), and steering (add a wiki.json to guide how the docs get generated, and your guidance carries through refreshes). The main branch is indexed by default; add long-lived branches in settings.

DeepWiki is also where you start asking questions: type into the text box at the bottom of any DeepWiki page and Devin answers, scoped to that repo. That is Ask Devin, and the next lesson is all about it.

DeepWiki MCP: any compatible AI client can query your DeepWiki docs without being inside the Devin app: one shared source of codebase truth across your tools. (Public repos only today.)