HF / Microsoft 7/7-7/8 open-source agent infra day: vLLM-transformers + LeRobot v0.6.0 + Microsoft Flint

Hugging Face and Microsoft shipped three open-source agent-infra pieces in the 24-48 hours of 7/7-7/8: Hugging Face 7/8 blog native-speed vLLM transformers modeling backend (opt into `--model-impl transformers` and the transformers backend matches or beats vLLM's hand-written native backend across 4B / 32B / 235B-FP8 Qwen3 workloads, using torch.fx static graph capture + Python ast rewrites); Hugging Face 7/7 blog LeRobot v0.6.0 'Imagine, Evaluate, Improve' (3 world-model policies VLA-JEPA / LingBot-VA / FastWAM + 5 new VLAs + 2 reward models + 6 new simulation benchmarks + lerobot-rollout CLI + HF Jobs cloud training); Microsoft 7/8 blog Microsoft Flint (Microsoft Research + Renmin IDEAS Lab joint project, a chart-spec language + MCP server so agents can produce Vega-Lite / ECharts / Chart.js). Together: the self-host agent stack got filled in within a single day.