Show HN: Vibe Flow – Pure-prompt toolkit for AI-assisted development (github.com)

Vibe Flow is a “pure-prompt” toolkit for AI-assisted development: a hackable collection of prompts and workflow conventions that turns large-code models into cooperative development agents. Announced as a Show HN project, it plugs into editors and copilots (VS Code, GitHub Copilot, Cursor) and targets high-quality coding models like Claude Sonnet 4/4.5 and GPT-5 (or GPT-5-Codex). The value proposition is practical: give an installation/upgrade prompt, and Vibe Flow scaffolds a documentation-and-plans layout so agents and humans can write specs, generate implementation plans, execute them, and produce summaries in a reproducible, auditable way. Technically, Vibe Flow creates a _docs/ and _plans/ hierarchy plus AGENTS.md and standardized files (e.g., How to Write a Technical Specification.md, Code Style Guidelines.md) and prescribes a three-step loop: produce _plans/123/A1-spec.md (spec), _plans/123/A2-plan.md (implementation plan), then “Implement the plan” to generate _plans/123/A3-summary.md. Key design choices: keep all agent context in git-ignored local files to avoid context-window limits and unreliable compression, share the same docs across agents/humans, and clear contextual chatter between stages. The toolkit is deliberately minimal and customizable — a starting framework to make agent workflows reproducible, auditable, and editor-integrated for professional dev teams.