Manuscript revision and pending experiment work, snapshot before restructuring

Clarity pass over the main text (36-item audit), Discussion rewrite and cut,
acknowledgements, Souly et al. as ref 62, lettered SI panels, model section
moved under Results; plus the untracked curriculum/society/compose/smol
configs, runners, figures, stats and tests that the SI already cites.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y64o8FKP7rCuXzC48pxpMm

configs/llm/curriculum_v5_g2.yaml

@@ -0,0 +1,25 @@
+# Stage B (prereg v4 §5 G2, v5 families): does forgetting occur, and is it general rather than one pair?
+# One lineage, zero replay, all six selected families in sequence at the founder budget that passed C1.
+# Pass: mean drop across families learned before the last >= 0.15, with no single family carrying
+# more than 50% of the total drop (the v4 failure mode: one pair at +0.65, the rest ~0).
+experiment: llm_curriculum_v5_g2
+kind: llm_curriculum
+base_model: Qwen/Qwen2.5-1.5B
+seed: 1
+families: [mnli, arc, hellaswag, squad, boolq, winogrande]
+lineages: 1
+generations: 6
+arms: [isolated]
+baselines: []
+n_new: 300
+n_replay: 0
+n_test: 60
+n_val: 20
+epochs: 3
+lr: 1.0e-4
+max_new_tokens: 48
+batch_size: 24
+train_batch_size: 2
+train_max_len: 512
+lora: {r: 16, alpha: 32}
+output: {dir: results/llm_curriculum_v5_g2}