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@@ -194,6 +194,13 @@ on average with at least 2/3 positive lesions. Among eligible prefixes, select t
endpoint, choosing the shortest prefix within one point. If none is eligible, the feedback-first
branch closes without using task seeds 6--8.
+**Feedback-first status: failed development on 2026-07-22.** The 100- and 400-step prefixes raised
+mean d4 validation from `78.633 ± 24.866%` to `81.867 ± 8.779%` and `82.450 ± 14.226%`; both had
+3/3 positive paired depth gains and lesions, versus 2/3 without warmup. Their mean gains were about
+18 points and all losses were finite. Neither met the frozen 90% endpoint threshold, so no prefix
+advances and task seeds 6--8 remain unused. Timescale separation reduces basin variance but does
+not make plain SGD regression of the moving apical map accurate enough.
+
### C3. Causal calibration is genuinely amortized
**Status: passed on 2026-07-22.** The frozen five-seed confirmation retained 112.9% of the K16/e4