https://pdac.dev/https://pdac.dev/manifesto/https://pdac.dev/spec/https://pdac.dev/spec/artifacts/https://pdac.dev/spec/conformance/https://pdac.dev/spec/delivery-slices/https://pdac.dev/spec/frontmatter-reference/https://pdac.dev/spec/handoff-contract/https://pdac.dev/spec/identifiers/https://pdac.dev/spec/product-changes/https://pdac.dev/spec/relationships/https://pdac.dev/spec/terminology/https://pdac.dev/spec/validation/