results: mark useful-depth BP screen passed

1 files changed, 5 insertions, 0 deletions

diff --git a/ROADMAP.md b/ROADMAP.md
index 308cce8..8b73deb 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -105,6 +105,11 @@ replace d4 after results are observed. The BP screen passes only if mean d1-to-d
 5 points, every task seed gains, mean d4 final-third-lesion drop is at least 2 points, and every
 task seed is hurt by the lesion. Only final validation metrics are observed.
 
+**BP useful-depth status: passed on 2026-07-22.** Across task seeds 0--2, d1-to-d4 gains were
+`+22.10`, `+42.85`, and `+33.90` points (mean `+32.95`). Bypassing the final third of d4 blocks
+reduced accuracy by `40.85`, `35.05`, and `34.85` points (mean `36.92`). The contextual d6 curve
+was less stable, so the preselected d4 endpoint remains fixed.
+
 If BP passes, the local-rule validation panel freezes d1/d4 for BP, FA, DFA, and no-traffic SDIL
 with C3's `K=1/every=4`, crossing the same three task seeds with student seeds 0--4. Its test panel
 may run only if the original C2 gate holds on validation and the d4 SDIL lesion loses at least