Update 4X4.md

Author: noelsaw1

4X4.md

@@ -35,9 +35,9 @@ WP Code Check is a zero-dependency static analysis toolkit for WordPress perform
 > **Tip:** If your team frequently handles urgent issues, consider reserving 1-2 slots for hotfixes. Otherwise, use all 4 slots for planned work.
 
 - [x] Refresh planning source of truth - Updated the Semgrep migration plan to match the current codebase, deprecated `BACKLOG.md`, and moved active planning into this 4X4.
-- [ ] Add file-discovery wrapper spike - Draft `cached_file_search()` or equivalent and replace one or two high-value call sites such as `AJAX_FILES` and `TERMS_FILES` to prove the interface.
-- [ ] Add observability for slow checks - Implement per-check timeout warnings and a small top-N slow-check summary so long scans stop looking stuck.
-- [ ] Audit fixture mismatches and shortlist Semgrep pilots - Re-run failing fixtures, classify false positives vs desired behavior, and finalize the first four Semgrep scorecard candidates.
+- [ ] Add file-discovery wrapper spike - Draft `cached_file_search()` or equivalent and replace one or two high-value call sites such as `AJAX_FILES` and `TERMS_FILES` to prove the interface. Benefit: fewer one-off search code paths, easier maintenance, and a lower chance that one slow check behaves differently from the rest.
+- [ ] Add observability for slow checks - Implement per-check timeout warnings and a small top-N slow-check summary so long scans stop looking stuck. Benefit: users can see what is slow, what timed out, and whether the scanner is still making progress instead of guessing that it froze.
+- [ ] Audit fixture mismatches and shortlist Semgrep pilots - Re-run failing fixtures, classify false positives vs desired behavior, and finalize the first four Semgrep scorecard candidates. Benefit: more trustworthy test results, clearer migration decisions, and less risk of moving a noisy or inaccurate rule to a new backend.
 
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