I spent my most of day's on a new team grepping through 80,000 lines of code trying to find where authentication worked. Four hours. Three teammates interrupted. Twelve dead ends across files I didn't understand. The code was fine — it was well-written, well-organized, reasonably documented. The tooling was the problem. I was using grep to understand something that wasn't a text search problem. Code has structure: call edges, import chains, type hierarchies, AST relationships. Grep ignores al...