Anthropic's target should be a codebase designed for agentic comprehension from the first commit. Here the codebase adapts to the agent. You can enforce conventions, structured metadata, semantic indexing, explicit dependency graphs. Whatever makes the agent's job trivial rather than heroic.
Where "robust tooling" is "grep with various regexes while completely missing the big picture even in small codebases"
And in my experience it hardly ever "misses the big picture". When it misses is small stuff I'd miss myself quite often anyway.