item 29 complete: trajectory TF = adapter training signal for hybrid regimes (39.1, p=0.045), not an internalization mechanism (job 2 answer-only 15.6 < 19.1 plateau; FR term harmful)

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

results-loop/PROTOCOL_UNIFIED.md

@@ -900,6 +900,25 @@ Nils's morning decision: clamp test vs pivot to the hybrid/A2 line
     rehearsal becomes the internalization method. All prior caveats
     (position coloring, teacher=warm-start quality) carry over.
     Jobs: scripts/jobs/zzz_u_traj_d1.sh, scripts/jobs/zzz_v_traj_full.sh.
+--- Outcome, item 29 COMPLETE (scored 2026-07-17 ~17:30; job-1 tf+fr
+ablation and job-2 remainder cancelled by Nils after the informative
+cells). JOB 1 (d=1): tf-only 39.1 matched / 39.1 ablated — the
+program's first significant positive (p=0.045 paired vs 31.6), gain
+attributed to the TRAINING SIGNAL (transition regressions improve the
+merge's state-folding under visible tokens), burst inert at inference
+(8-8, p=1.0). tf+fr arm 30.5 — the free-running term HURTS: clean
+teacher-forced transition gradients are the active ingredient;
+constraining the burst's own states distorts them. JOB 2 (answer-only,
+full-CoT waypoints): tf-only 15.6 (easy .586 / hard .094 / drop .11)
+— BELOW the 19.1 curriculum plateau, above the 9.4 cold floor.
+Compressed-rehearsal internalization FAILS, and the mechanism reading
+predicts exactly this: the trajectory-TF gain acts through visible-
+token carry steps, which answer-only mode lacks. Net: trajectory
+teacher-forcing enters the recipe book as an ADAPTER TRAINING SIGNAL
+for hybrid (visible-scratchpad) regimes; it is not an internalization
+mechanism. Follow-ups on file: seeds for the 39.1; trajectory TF on
+rung A (nothing deleted, move the 57.4).
+
     IN-FLIGHT, arm 1 (tf-only, d=1) scored ~15:40: THE FIRST
     SIGNIFICANT POSITIVE OF THE PROGRAM, WITH A MECHANISM TWIST.
     Vals best-in-series (easy 0.218, hard 0.347). Matched 2:0 = 39.1