GUIDES · THE CATEGORY
How to Understand a Codebase You Didn't Write
Understanding a codebase you didn't write starts with three questions: where does execution actually begin, what depends on what, and why was each part built the way it was. Reading files top to bottom answers none of them reliably — comments go stale, and "understanding" that lives only in the head of whoever wrote the code leaves the moment they do.
Mapnostics answers all three from the code and its git history rather than institutional memory: real entry points and a one-hop dependency graph from the Intent Map, a full dependency graph you can view by file, module, capability or workflow from the Code Map, and an onboarding guide built from the same graph. The pages below go deeper on each piece.
Terms in this cluster
- Codebase intelligence — Codebase intelligence is a category of tooling that analyses an entire repository — its structure, dependencies, history and risks — to answer questions about the system as a whole, rather than checking one file at a time.
- Repository intelligence — Repository intelligence is another name for codebase intelligence — analysis of a whole repository's structure, dependencies, history and risks to answer questions about the system as a whole. The two terms are used interchangeably.
- Intent map — An intent map is a description of why each part of a codebase exists — the purpose of a file or module and the capability it implements — as opposed to a dependency map, which shows only how the parts connect.
Features that answer this
- Intent map — Understand why your code exists, not just what it does. The Intent Map gives you AI summaries at repository, file and function level, the capabilities each file implements, and an evidence block that separates measured facts from inference.
- Code dependency mapping — Visualize your codebase architecture as a live dependency graph, built automatically from every import and route, with high-blast-radius hubs highlighted.
- MCP server — Give Claude, Cursor and any MCP-compatible agent grounded answers about your codebase instead of guesses. A full toolset over your real dependency graph — connect in minutes, no vector database to run yourself.
When this comes up
Who this is for
See it in your own codebase.
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