per-depth outcome scored (depth-stranded content, shared-tail rescue); kcurves updated with k=8

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

results-loop/PROTOCOL_UNIFIED.md

@@ -217,3 +217,16 @@ the fidelity dial.
     drop — the culprit is the learned/free B (with item 14 as the
     positive control). h2048 stays at the ceiling (hard <=46%), fidelity
     intact. parcae s1 reproduces easy ~71% within seed noise.
+
+--- Outcome, item 13a (scored 2026-07-15): prediction CONFIRMED — per-depth
+lands below/at the ceiling, never above. Detail is instructive: fidelity
+preserved throughout (easy 88.5/89.3/86.9 at k=2/4/8 — anchored B), but
+hard-bucket content is DEPTH-STRANDED: 17.9% at k=2 (adapters 3-4, which
+hold the hard-trained content, never execute), 35.7% at k=4, 42.9% at k=8
+— where depths 5-8 reuse adapter 4, i.e. the architecture reverts to
+shared-map iteration and the fixed-point mechanism collects the remaining
+gain. Time-variation adds a fragility (content unavailable except at its
+training depth) and no capability; map-sharing is load-bearing for the
+anytime-usable gain. Depth-4 adapter overfit visible in val (hard k4 CE
+0.188@99 -> 0.371@599) — LTV concentrates small-pool overfitting into
+single depths.