verify-summarylisted

# Verify the summary The implementation under `src/` is a checklist summarizer and `TODO.md` is its input. To confirm a change actually works: 1. Run `node src/main.js TODO.md`. 2. Against the committed `TODO.md` it prints `2/3 done` — a `done/total` count over the checklist items. If `TODO.md` changed, count its `[x]` items yourself and compare. 3. On a mismatch, the corpus is authoritative: read `docs/systems/scanner.md` and `docs/systems/renderer.md` and decide whether the code or the document has the bug — never adjust the expected output to match broken behavior. 4. Finish with `temper check .`: the structural gate must be green before the change is done. The entrypoint under test is src/main.js.