Claude-Codex Skills

Open-source standalone agent skills, distributed as plugins for Claude Code and OpenAI Codex, help turn product ideas, code fixes, architecture reviews and deployments into scoped work with a verifiable result. Each workflow defines what to check, what it may change, and how to report evidence and remaining gaps.

Project page · Install · Full catalog

Choose a route

Choose by the result you need. Each skill works independently.

Your task	Plugin	Result
Is this idea worth building?	product-discovery-suite	Opportunity assessment, requirements, or interaction design.
How should this system change?	architecture-suite	System map, design decision, or migration plan.
Is this plan ready to implement?	delivery-planning-suite	Reviewed plan, ordered work, and test strategy.
Fix, upgrade, simplify, or speed up this code.	implementation-suite	Scoped change with behavior and benefit checks.
What could go wrong with this delivery or codebase?	quality-assurance-suite	Evidence-backed findings or scoped acceptance tests.
Get this change published or deployed.	delivery-suite	Authorized publication or deployment, verified at its destination.
Why did this fail, or did the feature help?	operations-suite	Incident diagnosis or product outcome assessment.
Can I trust the instructions in this skill?	skill-maintenance-suite	Skill boundaries, consistency, and distribution review.
Prepare Docker containers, configuration, access control or recovery.	engineering-foundation-suite	Native technical contracts and verified changes.

Install

For a feature or fix, start with implementation-suite. Replace it with another plugin from Choose a route for a different task.

Claude Code:

/plugin marketplace add levnikolaevich/claude-code-skills
/plugin install implementation-suite@levnikolaevich-skills-marketplace
/reload-plugins

Codex:

codex plugin marketplace add levnikolaevich/claude-code-skills
codex plugin add implementation-suite@levnikolaevich-skills-marketplace

Invoke a skill by its full name: /implementation-suite:ln-41-surgical-change-implementer in Claude Code or $ln-41-surgical-change-implementer in Codex, followed by your task. For example: “Fix the total calculation when an item has a discount. Preserve the current rounding rules.”

For personal defaults shared by Claude Code and Codex, use the optional user instructions template and connection guide. Personalize and merge it into your existing configuration; plugin installation does not change global instructions.

Lifecycle and plugins

Product Discovery Suite

Decide what is worth building, who it serves, and what a useful first version must do.