Constitution-first, spec-driven development for AI agents — across Claude Code, OpenCode, and Google Antigravity.
JCSPECS (SDD JC) is my open-source methodology for AI-assisted development. It is constitution-first and spec-driven: product intent, UX direction, technical design, implementation tasks, tests, and validation evidence all live in repository documentation, so humans and AI agents work from the same durable context. Published on NPM as sdd-jc-methodology with a portable sdd-jc CLI.









