At the heart of BuildKit is LLB (Low-Level Build definition). Think of it as the LLVM IR of build systems. LLB is a binary protocol (protobuf) that describes a DAG of filesystem operations: run a command, copy files, mount a filesystem. It’s content-addressable, which means identical operations produce identical hashes, enabling aggressive caching.
Here's how each policy behaves when a producer writes faster than the consumer reads:
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Photo: Official Artemis crew portrait. Josh Valcarcel/NASA Handout/EPA-EFE/REX/Shutterstock
而据公开数据显示，xAI 初始的 12 位联合创始人中已有 7 位在不到三年内离开。