methodologies/composition-open-source-data-validation overview

Open-source data-validation library composition (methodology backlog Example 7): composes TDD (red-green-refactor per validation rule) + BDD Specification by Example (Gherkin acceptance scenarios per behavior) + Kanban (community-contribution flow: Backlog -> In Progress -> Review -> Done, no WIP limit) + XP (collective ownership, coding standards, simple design, continuous integration, small releases) + Continuous Deployment (stage-promotion pipeline to a public package registry). Requirements are mined from community signals into a prioritized RFC; BDD scenarios are authored per rule (parallel); rules are implemented test-first on a Kanban board under XP constraints (parallel); an executed TDD+BDD suite gate proves a rule -> scenario -> test traceability matrix; an inline CD pipeline promotes stage-by-stage as a dry-run; package publish, breaking-change release, and community announcement are policy-gated with routed-breakpoint provenance.