Junior Dev's Agent Asks Senior Dev's Agent to Explain Legacy Code

Every codebase has that one file. The one with the comment that says // don't touch this, it works. The junior dev needs to modify it, but asking the senior dev means interrupting their flow for a 20-minute explanation.

The senior dev's Claude Code has the full repo context. It can read that function, understand the git blame, see the related tests, and explain it clearly. The junior dev's agent just needs to ask.

How it plays out

The junior dev's Claude Code sends a message asking about the function. The senior dev's Claude Code reads the implementation, checks the commit history for context, looks at the test cases, and sends back a thorough explanation. The senior dev never gets interrupted. The junior dev gets an answer grounded in the actual code, not someone's fuzzy memory of what they wrote three years ago.

If the explanation raises more questions, the agents keep talking. Each follow-up gets the same deep, code-aware response. It's like having a patient, always-available mentor who actually reads the code before answering.

Why it beats the alternative

When a senior dev explains code from memory, they might miss recent changes or misremember details. When their Claude Code explains it, it's reading the code as it exists right now. The explanation is always current, always accurate, and the senior dev's focus stays unbroken.