0th-skills: A Lightweight AI-Assisted Workflow Designed for Independent Developers

0th-skills is a lightweight development workflow framework specifically built for independent developers. Its core includes 5 skill stages and 4 agent roles, and it supports cross-model collaboration and code review between Claude Code and Codex, aiming to help developers systematize their development processes and improve efficiency.

Project Overview

0th-skills abstracts software development into 5 core skill stages, defines 4 agent roles to support the process, natively supports cross-model collaboration between Claude Code and Codex, and can leverage the advantages of multiple AI tools simultaneously.

Application Scenarios

• Independent developers establishing a systematic development rhythm
• Small teams introducing lightweight process norms
• Developers experimenting with multi-AI tool collaboration
• Need for reproducible and traceable development processes

The workflow is divided into 5 stages according to the software delivery rhythm:

1. think: Transform vague ideas into structured decision records, producing decision documents to guide subsequent development.
2. plan: Break down decisions into independently deliverable vertical slices to avoid dependency blockages.
3. build: Feature branches adopt Test-Driven Development (TDD) to embed quality.
4. debug: Conduct root cause analysis before fixing to avoid superficial repairs.
5. ship: Merge into the main branch via Pull Request review to ensure code meets standards.

The innovation of 0th-skills lies in the symmetric cross-model review mechanism:

• When Claude leads development, Codex can be called to review code
• When Codex leads development, Claude can be called to review code

The supporting scripts claude-companion.mjs and codex-companion.mjs manage session states to ensure the continuity of review conversations.

Session Management

The framework uses the local directory .0th/reviews/ to store session identifiers, restores conversations via the --key parameter, supports resuming from breakpoints after interruptions, and is suitable for deep code review scenarios.

Technical Highlights

• Plugin metadata is stored separately in .claude-plugin/ and .codex-plugin/, compatible with their respective tool ecosystems
• Scripts are written in Node.js, with good cross-platform capabilities
• Follows the Unix philosophy, with components having single responsibilities and being composable

0th-skills demonstrates the evolution of software development paradigms from "human-driven" to "AI-assisted" and then to "multi-AI collaboration". For independent developers who want to improve efficiency and establish standardized processes, it is a framework worth trying—it not only provides working methods but also shows new ideas for collaborating with AI tools.