Manage Harness Software Supply Chain Assurance (SSCA) via MCP. Configure automated SBOM generation with CycloneDX or SPDX formats, set up artifact signing and attestation with Cosign, define supply chain security policies using OPA, and track SLSA provenance levels. Use when asked to generate SBOMs, sign artifacts, enforce supply chain policies, track software provenance, or manage SLSA compliance. Do NOT use for OPA pipeline governance policies (use create-policy instead) or vulnerability scanning (use security-report instead). Trigger phrases: SBOM, software bill of materials, supply chain security, SLSA, artifact signing, cosign, provenance, attestation, CycloneDX, SPDX, supply chain policy.