docs: G2b verdict — 4.8231; the register-add neutralized the epoch gain

48k total with +18k classical Tashkeela at 6 epochs: flat vs the 3ep
4.8218 control, 0.25pp worse than news-only G2a 4.5701. Paired
bootstrap +2.3717 CI 2.194-2.554; teacher reproduces 2.289. With E6
swap 5.8057 the domain-coverage attribution is negative in BOTH
directions; Paper-B lever table gains E5/E6/G2b rows and the framing
line is corrected. Verdict read from final_eval.json on the volume;
recorded per TODO.substantiate item 04.

Author: Ronald Tse

docs/EXPERIMENTS.md

@@ -297,6 +297,27 @@ All rows passed the CER parity gate at release. Readings:
   shows a convergence-speed effect distinguishable from noise on the
   surviving curves; the DER gates remain the only verdicts.
 
+## G2b — label-scale ADD rung (run-011-tashkeela-6ep) — verdict recorded 2026-09-04
+
+- **Design** (ml #135): 48,000 total units — the control's news-mix
+  plus 18,000 additional classical Tashkeela units — trained 6 epochs
+  (G2a's epoch count). Spec `ara-diac-small-2-6ep-tashkeela`.
+- **Status:** COMPLETE — **4.8231** full-set windowed DER (n=1200;
+  teacher reproduces 2.289; paired bootstrap student−teacher +2.3717,
+  CI [2.194, 2.554]). From final_eval.json on the volume; run
+  completed and evaluated by its owners; recorded here per
+  TODO.substantiate item 04. Labels sha256 b59e2f5677693eab8968208e0
+  0a70590d03ce743fbc43b2acdb0ac9bd508c8fb.
+- **Read:** the domain-coverage attribution is now negative in BOTH
+  directions at matched epochs. Swapping news out (E6, 3ep): 5.8057.
+  Adding classical units on top (G2b, 6ep): 4.8231 — flat vs the 3ep
+  30k control (4.8218) and 0.25pp WORSE than news-only G2a (4.5701):
+  the Tashkeela add neutralized the epoch gain entirely. The
+  post-E3 residual is not register-shaped; the only levers that have
+  moved this rung are optimizer (−2.96pp), fresher teacher labels
+  (−0.47pp), and epochs (−0.25pp). What remains is GKD (on-policy
+  exposure, run-012 in flight) — after which the ladder is closed.
+
 ## GKD — on-policy distillation rung (REGISTERED/ARMED 2026-09-03)
 
 - **Status:** REGISTERED, launch pending owner ordering (the last

docs/PUBLICATION-NOTES.md

@@ -77,11 +77,16 @@ confound (fresh aux head for the final 23% of steps); E6
 constant-budget register swap (2026-09-02): 5.8057 — replacing news
 units with classical Tashkeela at constant total HURT (−0.98pp vs
 control), the domain-shaped-residual hypothesis's causal test
-failing in the swap direction; the add direction (G2b) remains
-open.** The E5/E6 pair is the paper's data-vs-architecture exhibit:
+failing in the swap direction; G2b label-scale ADD (2026-09-04,
+verdict recorded per TODO.substantiate 04): 4.8231 — 48k total
+(+18k classical) at 6 epochs is FLAT vs the 3ep control and 0.25pp
+worse than news-only G2a (4.5701): the add neutralized the epoch
+gain, closing the domain hypothesis negative in BOTH directions.**
+The E5/E6/G2b set is the paper's data-vs-architecture exhibit:
 two levers from the frontier-LLM literature (MTP, register
-diversification at constant budget) both regressed on byte-level
-student distillation — the levers that moved the rung were optimizer
+diversification — swap or add) plus the label-scale hypothesis all
+regressed or flat on byte-level student distillation — the levers
+that moved the rung were optimizer
 (E3), fresher teacher labels (E4), and epochs (G2a).
 
 ### 9. Muon optimizer A/B on the memory student (E3) — LANDED 2026-08-28
@@ -226,14 +231,19 @@ The decomposition for paper B, every line full-set with brackets:
 | + Muon (E3) | 5.2945 | — |
 | + r7 teacher | 4.8218 | — |
 | + 6 epochs (G2a) | 4.5701 | delta 2.12 [1.91, 2.35] |
+| register swap (E6, 3ep) | 5.8057 | negative |
+| register add (G2b, 6ep) | 4.8231 | delta 2.37 [2.19, 2.55] |
+| MTP-aux (E5, 3ep) | 5.0853 | negative (confound disclosed) |
 | depth halved (lite, 6ep) | 5.784 | delta 3.25 [3.03, 3.49] |
 
 Paper-B framing: levers compose roughly additively (optimizer >>
-teacher > epochs), and the E6 causal test came back NEGATIVE —
+teacher > epochs), and BOTH register tests came back NEGATIVE —
 swapping 8k news units for classical-register Tashkeela at constant
-30k total scored 5.8057 (−0.98pp vs control), so the residual is
-not fixed by register mix at constant budget; the add direction
-(G2b, 48k total) is the live test, and capacity appears ONLY as
+30k total scored 5.8057 (−0.98pp vs control), and adding 18k
+classical units on top at 6 epochs scored 4.8231 (flat vs the 3ep
+control, 0.25pp worse than news-only G2a — the add neutralized the
+epoch gain): the residual is not register-shaped in either
+direction, and capacity appears ONLY as
 depth — width is load-bearing (both stitch ratios collapsed) while
 depth trades 1.21pp for 37% of the artifact. The subset-overstatement
 phenomenon (five instances, up to 3.2x inflation) is the