Claude-Codex Skills

Give your AI agent a clear finish line.

You ask for a fix and get a new abstraction. A review lists generic advice. The agent says “done,” but you still have to work out what it checked.

These skills give Claude Code and Codex a concrete way to finish the task: establish the intended outcome, work within scope, verify the result, and make remaining gaps explicit. Choose the skill for the problem in front of you.

Project page · Install · Full catalog

What changes in your workflow

• A clearer target. Turn an idea, bug report, or incident into an outcome the agent can check.
• Focused work. Reuse existing capabilities, fix the owning cause, and remove what the change makes obsolete.
• A result you can assess. See the evidence, failed or unavailable checks, and remaining risks behind the verdict.
• Control over consequential actions. Reviews report findings; implementation stays within the agreed scope; publication and deployment follow their authorization boundaries.

Choose a route

Start where you need help. Each skill works independently; a small fix does not require a full lifecycle or audit.

Your problem	Plugin to install	Useful result
Is this idea worth building?	product-discovery-suite	A reasoned opportunity decision, clear requirements, or a usable interaction design.
How should this system change?	architecture-suite	An evidence-backed system map, design decision, or migration approach.
Is this plan ready to implement?	delivery-planning-suite	Missing decisions exposed, work sequenced, and verification planned.
Fix, upgrade, simplify, or speed up this code.	implementation-suite	A bounded change checked against the intended behavior and benefit.
What could go wrong with this delivery or codebase?	quality-assurance-suite	Prioritized findings tied to evidence, or acceptance tests for the agreed scope.
Get this change published or deployed.	delivery-suite	The authorized destination updated and the observed result checked.
Why did this fail, or did the feature help?	operations-suite	An evidence-backed diagnosis or product outcome assessment.
Can I trust the instructions in this skill?	skill-maintenance-suite	A review of its boundaries, consistency, and distribution readiness.

For a larger task, combine only the steps needed to resolve decisions and produce evidence. Supplied requirements, existing designs, and current tests are valid starting points. Implementation includes its own verification; a separate test-building or review skill is optional.

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.”

Lifecycle and plugins

Standalone skills for Claude Code and Codex, grouped by the work you need to do. Browse the outcomes below to find the right skill for your task.

1 Product discovery → 2 Architecture → 3 Delivery planning
 → 4 Implementation → 5 Quality assurance → 6 Delivery → 7 Operations
 ↑ Product feedback / architecture changes / operational remediation ↵

8 Skill maintenance supports the collection itself.

The numbers group skills by task. Install one family or combine the capabilities you need.

Product Discovery Suite

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

Index	Skill	Purpose
11	Opportunity Evaluator	Evaluates new product opportunities through demand, channels and economics before committing to build.
12	Product Requirements Builder	Defines product requirements, business rules and acceptance criteria for a committed intent; edits product docs only.
13	Interaction Design Builder	Designs user flows, interaction states and mockups for a defined product scope; does not implement UI code.

Architecture Suite

Understand the system you have and choose changes with clear boundaries, tradeoffs, and recovery paths.

Index	Skill	Purpose
21	System Design Baseline Builder	Defines measurable architecture drivers and constraints before system design; edits architecture docs only.
22	Current Architecture Documenter	Documents current architecture from implementation evidence; does not propose a target or audit fitness.
23	System Design Proposal Builder	Designs target system boundaries, contracts and tradeoffs from requirements; does not plan tasks or implement.
24	Architecture Decision Recorder	Records one architecture decision with alternatives, consequences and status; does not design the w