Show HN: Specification First Agentic Development Plugin and Prove

This article describes a specification-first development workflow plugin that enables AI agents to work systematically from detailed specs rather than through iterative back-and-forth dialogue. Key features include parallel spec execution across multiple worktrees, automatic verification gates, resumable state management, and comprehensive decision logging that keeps reasoning alongside code changes. The system allows developers to break large changes into series of interdependent specs that build in parallel when they don't conflict, ultimately producing well-documented pull requests with clear audit trails.