items 16 + 15-closure scored: cross-task transfer toxic (task-locality confirmed 3-point); noise-s0 50%+ was a lucky seed

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

results-loop/PROTOCOL_UNIFIED.md

@@ -303,3 +303,24 @@ the fidelity refutation replicates. easy 70.5/73.0/72.1 at k=2/4/8
 ordinary seed spread at n=28). Two-seed conclusion: contraction-with-
 free-B loses ~17 points of easy items regardless of seed; the phase
 diagram's Parcae point is solid.
+
+--- Outcome, item 16 (code->GSM8K transfer, scored 2026-07-15): ALL THREE
+PREDICTIONS CONFIRMED, emphatically. MBPP-trained loop on GSM8K: hard
+0.8-1.6% at every k (prediction a: ~0 gain — plan content is task-local);
+easy 93.1 -> 27.6-44.8% (prediction b: damaged, in fact WORSE than the
+GSM-trained merge's 48%); overall strictly below k=0 at every k>0
+(prediction c). noise-s0 variant identical (easy 34.5, hard 1.6). The
+transfer-distance ladder ends cleanly: near (HumanEval) tie, far-code
+(LCB) trained-hurts, cross-task (GSM8K) trained-content actively toxic
+while gaining nothing. Task-locality of the learned content is now a
+three-point monotone result.
+
+--- Closure of the item-15b/15c "ceiling nudged upward" question
+(2026-07-15, after ns seeds): LUCKY SEED, per the pre-registered rule.
+noise-s0 hard(k=4) across seeds: 53.6 / 39.3 / 35.7 -> seed mean 42.9,
+inside the 37-46 band. Fidelity across seeds intact (easy 90.2-94.3 —
+the factorial conclusion is seed-robust); the 50-54% cells (ns seed 0,
+h2048 single seed) were upper-tail draws of the same distribution the
+merge's 46.4 came from. No recipe amendment; the abstract's original
+"same level within noise" framing stands; single-cell records are not
+levels — only seed means are.