645 SIGMA 0x8200 OR DLY IN+D ; SIGMA = 0xE200 (V86 access rights)
A frontend is a container image that BuildKit runs to convert your build definition (Dockerfile, YAML, JSON, HCL, whatever) into LLB. The frontend receives the build context and the build file through the BuildKit Gateway API, and returns a serialized LLB graph.
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"skillUsage": {}