Neat reads your codebase with tree-sitter and builds a graph of what's actually there: services, files, calls, databases, infra. Commit something new, the graph updates. No config, no manual diagramming.
use it to
Onboard an agent to a new repo in seconds — it reads the map instead of grepping around.
Ask "what talks to the payments service?" and get an answer from structure, not a guess.
Keep a system diagram that never goes stale, because it's generated from the code itself.