IliaLarchenko/behavior_224_rgb
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Ilia Larchenko PRO
IliaLarchenko
AI & ML interests
I am a Data Science Director with a diverse technical and business background. I live in Bangkok and work in Agoda, where I lead multiple DS and ML teams. I was an active Kaggler in TOP-20 of a global competition ranking, Competitions and Notebooks Master
Recent Activity
submitted a paper 3 days ago
Learning to Fold: prizewinning solution at LeHome Challenge 2026 (1st place online, 2nd offline) authored a paper 4 days ago
Learning to Fold: prizewinning solution at LeHome Challenge 2026 (1st place online, 2nd offline) posted an update 5 days ago
I placed 🥈 2nd in the LeHome Challenge (ICRA 2026), and 🥇 1st of 62 teams in the first simulation round. Now I'm open-sourcing the full solution — code, tech report, and final weights.
The task: teach a cheap two-armed robot (SO-ARM101) to fold 4 garment types — long/short tops and pants. Garment category is hidden at eval. Round 1 in sim (auto-scored), round 2 on a real robot (jury-scored).
I trained a VLA policy with an RL loop on top. The key ideas:
🧠 The policy is its own value function. From the same forward pass that picks the next action chunk, cheap heads predict success probability, task completion %, garment type, and future keypoint distances + a Q-residual. Those become the advantage signal for RL — no separate critic.
🔁 A fully asynchronous RL loop coordinated only through the HF Hub: 1 trainer (H200) ships a fresh checkpoint ~every 40 min while N rollout workers (and a human doing teleop / DAgger corrections) collect data in parallel. Nobody waits — it uses the off-policy nature of the loop to the fullest.
📈 Binary success is too sparse, so I densify it into per-frame advantage via GAE — from objective keypoint checkpoints, the success-probability value baseline, and completion %.
🎛️ The RL combines AWR + RECAP. I also tune the inference knobs — execution length, playback speed, inpainting overlap, CFG scale, best-of-N — with a per-parameter Thompson-sampling bandit folded into rollout collection.
🔧 Round 2: with only ~1 week and no access to the eval robot — so the pipeline was sim → my robot → their robot, leaning on heavy augmentation to make the policy more robust.
📝 Blog: https://ilialarchenko.com/projects/lehome2026
📄 Tech report: https://huggingface.co/papers/2606.27163
🔧 Code: https://github.com/IliaLarchenko/lehome_solution
🤗 Sim policy: https://huggingface.co/IliaLarchenko/lehome_sim
🤗 Real policy: https://huggingface.co/IliaLarchenko/lehome_real
🌐 Challenge: https://lehome-challenge.com/Organizations
