Agent Skills: sbom

Generate standards-compliant SBOMs (CycloneDX 1.6 + SPDX 2.3) for a project across stacks (npm, Python, Go, Rust, Java, containers), with optional quality scoring, vulnerability scan, VEX, and signing. Adds zero dependencies to the target project. Use when the user asks for a software bill of materials, dependency inventory, supply-chain manifest, or CycloneDX/SPDX output.