# Note to lab — kick off T1 Fusion-SFT NOW (lab side)

## Why now

H100 GPU is saturated by the vLLM bench grid for the next ~8 hours
(T3 zs_raw running, T3 zs_enriched queued). Lab cluster has spare
GPUs — best path to parallelise the headline.

## What's missing

We have **no usable T1 fusion-SFT or LoRA result** anywhere:

* Lab smoke `exp_t1_grid_separatedQA_20260424_154915/lora_{raw,enriched}/`
  is **collapsed** — model output is `CTGCTGCTG...` repeated 1790
  characters, 3 unique chars in the first 200. Length ratio 3.64–3.90,
  unusable.
* H100 hasn't run T1 fusion-SFT yet (queued as Stage 1 of the
  post-bench pipeline; fires after the bench grid exits).

So **T1 fusion-SFT is the single biggest missing piece for the
paper's Table 1 row 4** ("Fusion SFT, per task").

## Critical pre-flight

You **must** be on a checkout that includes
[`bda9ee0`](https://github.com/explcre/biomodel_reasoning_calling_study2/commit/bda9ee0)
("CRITICAL FIX: SFT collators were bypassing the sanitiser") before
launching. Without that commit the trainer reads raw user content
including `peak_name=`, the T2 "Observed dataset row is a released
paired link …" leak, `label_source=`, `Evolution proxy score …`, etc.
— training on leaky data invalidates the run.

```bash
git fetch origin mllm-integrate-server2
git checkout mllm-integrate-server2
git log -1 --oneline   # should be >= bda9ee0 (currently 25b6a4c is head)
pytest regureasoner_loop/tests/test_sft_collator.py::test_collator_strips_leak_terms_before_tokenisation
# expect: 1 passed
```

## Launch recipe — T1 Fusion-SFT (LLaVA mode, current default)

```bash
sbatch \
  --nodelist=laniakea --partition=zhanglab.p \
  --gres=gpu:1 --cpus-per-task=8 --mem=120000M --time=12:00:00 \
  --job-name=t1_fusion_sft \
  --export=ALL \
  --wrap="cd $PWD/regureasoner_loop && \
          source slurm/_pixi_env.sh && \
          \$PYTHON_BIN scripts/train_fusion_sft.py \
              --train-jsonl /extra/zhanglab0/INDV/pengchx3/regureasoner_loop/data/prod_samples/train.enhancer_generation.strat7c.n35k.jsonl \
              --eval-jsonl  /extra/zhanglab0/INDV/pengchx3/regureasoner_loop/data/prod_samples/test.enhancer_generation.strat7c.n7k.jsonl \
              --output-dir  /extra/zhanglab0/INDV/pengchx3/regureasoner_loop/runs/exp_t1_fusion_sft_lab_${STAMP} \
              --llm-name Qwen/Qwen3.5-2B \
              --dna-model-key ntv3-650m \
              --ntv3-snapshot-path /extra/zhanglab0/INDV/pengchx3/ntv3_local/generative \
              --batch-size 4 --grad-accum 2 --lr 2e-5 --epochs 1 --max-length 2048 \
              --save-strategy steps --save-steps 1000 \
              --architecture-mode llava \
              --wandb-project dnathinker --wandb-run-name t1_fusion_sft_lab_${STAMP} \
              --keep-top-k 3 --best-metric-key eval_loss --best-metric-mode min"
```

Same recipe as H100's `post_bench_pipeline.sh` Stage 1 — just with
`--output-dir` on `/extra/zhanglab0` so we don't trip H100's tmpfs.

## After it lands

```bash
# Push to HF so H100 can pull it for inference
python regureasoner_loop/scripts/sync_checkpoints.py \
    --src    /extra/zhanglab0/INDV/pengchx3/regureasoner_loop/runs/exp_t1_fusion_sft_lab_${STAMP}/final \
    --dest   runs/exp_t1_fusion_sft_lab_${STAMP}/final \
    --repo-id explcre/dnathinker-checkpoints
```

H100 will then pull and run `predict_fusion.py` on the full T1 test
set + score with the new `run_generation_eval.py` (Stage 1b
equivalent) → headline T1 fusion-SFT row.

## Wall-clock estimate

* Training: ~6 h on a single A100/H800 with batch_size=4 grad_accum=2.
* H100 sync + bench eval: ~2 h after weights land.

So **8h end-to-end vs ~14h if we wait for H100's bench grid**.

## Architecture-mode ablation (fire alongside if you have GPUs)

`slurm/run_unified_arch_ablation.sh` fires three jobs (llava control +
unified+ntp + unified+mdlm) on the same data. ~10h each on one GPU,
or parallel across three GPUs. Adds the Phase-2 row to Table 3.

## Bonus: T2 + T3 fusion-SFT also

Same pattern with `--train-jsonl …pair_prediction.strat7c.n35k.jsonl`
and `…enhancer_editing.strat7c.n35k.jsonl`. Consider firing all three
in parallel if you have the GPUs.

---

The reaper on H100 (`/dev/shm/dnathinker/genqual_reaper_v5.sh`) will
auto-score any predictions.jsonl that lands in
`runs/exp_t*_grid_separatedQA_20260426_h100_vllm_full/*/`. So as soon
as the bench finishes a task, the new-framework metrics
(`eval_t3_oracle.py` for T3, `run_generation_eval.py` for T1/T3)
fire within 30 seconds — no waiting for the post-bench pipeline.
Same will work for any adapter-prediction the lab produces if you
drop predictions into a path the reaper watches.