# Forced-stop control for the declinable merge (manuscript review, 2026-09-11). Identical to the v5
# `society` arm except that recombination is switched off from generation 3 onward (`merge_until: 3`):
# obligate merging at generations 0-2, none afterwards. This is the fixed "merge early, then stop"
# schedule the veto arm must be compared against, because in the seed-1 veto run lineages declined
# 1/3 of merges at generations 0-2 and 3/3 at 3-5. Pre-registered readout: tasks/prereg-llm-society-v4.md §8g.
experiment: llm_curriculum_v5_stop3
kind: llm_curriculum
base_model: Qwen/Qwen2.5-1.5B
seed: 1
families: [mnli, arc, hellaswag, squad, boolq, winogrande]
lineages: 3
generations: 6
arms: [society]
baselines: []
allow_veto: false
merge_until: 3
n_new: 300
n_replay: 150
n_test: 60
n_val: 20
epochs: 3
lr: 1.0e-4
operator: linear
merge_weights: [[0.5, 0.5], [0.3, 0.7], [0.7, 0.3]]
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_stop3}