write summary to root/most-ancestral node

frontend/src/ contains a js/, src/, and templates/, each of which contain files. llamero currently writes summaries into those three folders, but no summary for frontend/ or src/. contend that frontend/ should get a SUMMARY of all files below

Inspect the existing summary-writing behavior for frontend/src/js/, frontend/src/src/, and frontend/src/templates/ to find the relevant entry point. Confirm how summaries are generated, then extend the behavior so frontend/ receives a SUMMARY covering all files below it, including the existing subdirectories.

Written by the indexing model from the issue text.