YC S26 startup Hebbian Robotics open-sources HFlow, an SDK that turns multimodal robot recordings into queryable dataset manifests
HFlow is a Python SDK that turns synchronized multimodal recordings (video, joint states, actions, timestamps) from robots or human operators into standardized, quality-checked episodes and queryable dataset manifests. It uses the MCAP container format (like a ROS bag) to keep video and sensor streams in sync. Pipeline steps—transformations, checks, labels, enrichments—are plain Python functions that run locally during development and are packaged as Airflow 3 DAGs for batch processing. Quality checks store reusable evidence rather than imposing a universal definition: black frames, frozen video, timestamp drift are measured deterministically; VLMs or MediaPipe Hands can detect more complex metrics. Results go into an append-only Parquet catalog queried via DuckDB SQL, producing a version-pinned manifest without reopening raw recordings. Pre-v1, Apache-2.0, single-tenant, no hosted control plane yet. The post doesn't spell out which robot hardware or sensor formats are supported beyond MCAP.