# Track C confirmatory: same-family size ladder Qwen2.5-1.5B -> Qwen2.5-3B (shared tokenizer). Test split, synthetic + exec.
experiment_id: E3_core
splits: [test]
families: [synthetic, exec]
lengths: [2000, 8000]
limit_docs_per_family: null
max_questions_per_doc: 8
model_pairs:
  - {sender: qwen1b5, receiver: qwen3b}
generation: {max_tokens: 48, per_family: {exec: 320}}
seeds: [0]
conditions:
  - {method: A1}                                   # receiver alone, full context (reference)
  - {method: A4, budget_tokens: 512, access: blind} # sender-generated summary -> receiver
  - {method: A5, budget_tokens: 512, access: blind}
  - {method: C0}                                   # identity negative control
  - {method: C2, mapper: runs/checkpoints/mapper_qwen1b5_to_qwen3b.npz}
  - {method: C3, mapper: runs/checkpoints/mapper_qwen1b5_to_qwen3b.npz, keep_frac: 0.25, access: aware}