docs: register oral B structural recovery

1 files changed, 11 insertions, 0 deletions

diff --git a/ROADMAP.md b/ROADMAP.md
index 67f0b31..a8de7d2 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -32,6 +32,17 @@ preregistered stop rule, environment seeds 10--15 and all confirmation model see
 untouched. This falsifies the current model's claimed emergence of the Harnett derivative signature;
 it cannot be repaired by reporting only its successful learning or decoder results.
 
+**Oral-B recovery R0 status: mechanics passed, task gate sealed.** Reinspection
+of Fig. 5 and Extended Data Fig. 13 identifies a structural target conflict:
+the failed vectorizer regressed `e_t s_i`, so its role contrast encoded current
+error magnitude rather than the sign of error change. `ORAL_B_RECOVERY.md`
+factorizes a new candidate into a perturbation-learned causal role and the
+within-episode performance innovation `|e_(t-1)|-|e_t|`. Deterministic checks
+recover the role at cosine `0.9963` and change the controlled sign index from
+negative to `+0.100`. This is mechanics only; no BCI endpoint, development
+seed, or confirmation seed is touched. The learning gate remains sealed until
+D4 closes and a separate R1 protocol is committed.
+
 ## Frozen accept claims and gates
 
 ### C1. Innovation is necessary under naturally mixed apical traffic