results: close oral B signature screen

1 files changed, 10 insertions, 0 deletions

diff --git a/ORAL_B.md b/ORAL_B.md
index 1bac204..0102f23 100644
--- a/ORAL_B.md
+++ b/ORAL_B.md
@@ -12,6 +12,13 @@ No oral-B result may be generated before this protocol is committed. Native
 accept-bar baselines may continue in parallel, but the oral-B confirmation may
 not be inspected until C4 is closed.
 
+**Development status: failed on 2026-07-22.** The complete 36-run frozen grid
+was generated from clean revision `b4458cd` and no confirmation seed was
+touched. All 12 candidates failed the sign-inversion requirement in all three
+task environments. No candidate is eligible, so the confirmation specified
+below is prohibited. Detailed negative results are retained in `RESULTS.md`
+and `results/bci_dev_selection.json`.
+
 ## What the biological experiment establishes
 
 The paper motivates four experimental conditions for a vectorized dendritic
@@ -106,6 +113,9 @@ no run or seed may be removed. A result file must record the source revision,
 dirty state, task/model seed, full dynamics, phase masks, scalar reward
 observations, forward-equivalent work, and peak memory.
 
+This section remains the preregistered confirmation that would have followed
+an eligible development result; it was not run after the failed screen.
+
 ### B1. Innovation identification and network predictability
 
 - Mean absolute per-cell `corr(r_i, h_i)` is at most 0.10.