Skill Catalog
Certified AI Skills for Claude Code, Codex, OpenClaw, and Google Antigravity
Every skill in the catalog is Nexus Certified - built, tested, and validated on every required platform before it ships. Browse individually or save with a bundle.
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Showing 30 of 30 skills in Software Development.
Code Generation & Review
Featured
Code Generation
Generates, reviews, debugs, and executes code in sandboxed workflows. Useful for implementation, refactoring, and technical problem solving.
Claude CodeCodexOpenClawGoogle Antigravity
codingdebuggingcode-review
$19.99
One-time license
Product Documentation & Onboarding
API Documentation Generator
Generates structured, developer-ready API documentation from code, OpenAPI specs, route definitions, or descriptions. Produces reference docs, quickstart guides, error references, and code examples.
Claude CodeCodexOpenClawGoogle Antigravity
apidocumentationdeveloper-experience
$19.99
One-time license
Code Generation & Review
Intelligent PR Composer
Generates pull request descriptions that capture context, alternatives considered, test plan, risk areas, and reviewer guidance beyond a simple diff summary. Useful for teams that want senior-quality PRs without manual authoring.
Claude CodeCodexOpenClawGoogle Antigravity
pull-requestscode-reviewgit
$19.99
One-time license
Code Generation & Review
Code Review Requester
Produces a structured code review brief identifying high-risk sections, performance or security concerns, and a minimum reading path for time-constrained reviewers. Useful for accelerating review cycles and reducing back-and-forth.
Claude CodeCodexOpenClawGoogle Antigravity
code-reviewcollaborationpull-requests
$19.99
One-time license
Code Generation & Review
Pair Programmer Challenger
Presents two to three alternative implementation approaches with trade-off analysis before writing code, forcing deliberate choice over first-suggestion acceptance. Useful for high-stakes architectural decisions and avoiding tunnel vision.
Claude CodeCodexOpenClawGoogle Antigravity
architecturedecision-makingplanning
$19.99
One-time license
Product Documentation & Onboarding
Codebase Onboarding Generator
Analyzes an unfamiliar codebase and produces a machine-readable and human-readable brief with architecture map, conventions list, and flagged risk areas. Useful for first-contact orientation on new or legacy projects.
Claude CodeCodexOpenClawGoogle Antigravity
onboardingcodebasedocumentation
$19.99
One-time license
Product Documentation & Onboarding
Release Notes Writer
Translates technical commit history and PR descriptions into user-facing release notes with highlights, fixes, and an upgrade guide for breaking changes. Useful for product teams that want polished release comms without manual authoring.
Claude CodeCodexOpenClawGoogle Antigravity
release-noteschangelogcommunications
$19.99
One-time license
Architecture Decisions
Architecture Decision Recorder
Captures significant design decisions into structured Architecture Decision Records with context, options considered, decision made, and consequences. Useful for building the decision audit trail teams need for governance and onboarding.
Claude CodeCodexOpenClawGoogle Antigravity
adrarchitecturedocumentation
$19.99
One-time license
Specs & Governance
Spec-First Enforcer
Produces a structured specification with problem definition, inputs, outputs, constraints, and success criteria before any implementation begins. Useful for preventing semantic drift and aligning on scope before writing code.
Claude CodeCodexOpenClawGoogle Antigravity
specificationsplanningrequirements
$19.99
One-time license
Specs & Governance
Code Complexity Auditor
Scores functions on cyclomatic complexity, cognitive load, and length, then flags thresholds exceeded and suggests refactoring into smaller testable units. Useful for preventing maintenance debt from rapidly generated code.
Claude CodeCodexOpenClawGoogle Antigravity
code-qualitycomplexityrefactoring
$19.99
One-time license
Specs & Governance
Technical Debt Tracker
Maintains a running register of technical debt introduced during development sessions, including shortcuts taken, skipped tests, and complexity increases. Useful for visible debt accounting and prioritized paydown planning.
Claude CodeCodexOpenClawGoogle Antigravity
technical-debtengineering-qualityregisters
$19.99
One-time license
Specs & Governance
Accessibility Auditor
Scans UI components for WCAG 2.2 AA violations including ARIA gaps, keyboard navigation issues, contrast failures, and screen reader compatibility. Useful for legal compliance and inclusive product development.
Claude CodeCodexOpenClawGoogle Antigravity
accessibilitywcaga11y
$19.99
One-time license
AI Engineering
LLM Prompt Optimizer
Analyzes prompt templates for token inefficiency, ambiguity, missing examples, and poor output specification, producing an optimized version with cost and quality deltas. Useful for teams running LLM-backed features in production.
Claude CodeCodexOpenClawGoogle Antigravity
llmpromptsoptimization
$19.99
One-time license
AI Engineering
RAG Pipeline Builder
Generates a complete RAG pipeline with chunking strategy, embedding model selection, vector store setup, hybrid retrieval, and a quality evaluation harness. Useful for standing up production RAG without expert-level tuning.
Claude CodeCodexOpenClawGoogle Antigravity
ragllmretrieval
$19.99
One-time license
AI Engineering
Model Evaluation Harness
Generates a full ML model evaluation framework with task-appropriate metrics, evaluation datasets, baseline comparisons, and a populated model card. Useful for making ML evaluation a default step instead of a skipped one.
Claude CodeCodexOpenClawGoogle Antigravity
mlevaluationmetrics
$19.99
One-time license
AI Engineering
Agent Tool Contract Reviewer
Builds an agent-engineering review artifact for agent tool contract reviewer work, turning agent workflow, prompt, tool, or eval artifact, expected behavior and failure examples, and model, tool-call, and approval constraints into agent tool-contract boundary check, tool prompt or evaluation failure mode, and contract agent implementation acceptance test.
Claude CodeCodexOpenClawGoogle Antigravity
agenttoolcontract
$19.99
One-time license
Code Quality & Refactoring
Complexity Refactor Plan
Builds a code-quality repair plan for complexity refactor plan work, turning code excerpts, dependency map, or static-analysis notes, complexity, duplication, or naming concerns, and risk tolerance and test coverage context into cyclomatic and cognitive complexity hotspots, refactor sequencing, and blast-radius containment.
Claude CodeCodexOpenClawGoogle Antigravity
complexityrefactorplan
$19.99
One-time license
Frontend & UI Development
Component Spec From Design
Builds an operator-ready artifact for component spec from design work, using component, spec, from, and design evidence to produce component evidence triage for component spec from design, spec decision rule for frontend & ui development, and from owner handoff for the supplied source packet.
Claude CodeCodexOpenClawGoogle Antigravity
componentspecfrom
$19.99
One-time license
Code Quality & Refactoring
Duplicate Code Finder
Builds a code-quality repair plan for duplicate code finder work, turning code excerpts, dependency map, or static-analysis notes, complexity, duplication, or naming concerns, and risk tolerance and test coverage context into duplicate code smell classification, code refactor sequencing plan, and finder test and blast-radius guardrail.
Claude CodeCodexOpenClawGoogle Antigravity
duplicatecodefinder
$19.99
One-time license
Specs & Governance
Feature Acceptance Criteria Builder
Builds a spec governance artifact for feature acceptance criteria builder work, turning spec, PRD, issue, or governance artifact, acceptance criteria and owner expectations, and edge cases, non-goals, and approval rules into feature requirement clarity check, acceptance acceptance-testability review, and criteria implementation handoff condition.
Claude CodeCodexOpenClawGoogle Antigravity
featureacceptancecriteria
$19.99
One-time license
Code Quality & Refactoring
Import Graph Analyzer
Builds a code-quality repair plan for import graph analyzer work, turning code excerpts, dependency map, or static-analysis notes, complexity, duplication, or naming concerns, and risk tolerance and test coverage context into dependency direction map, cycle detection, and module-boundary repair path.
Claude CodeCodexOpenClawGoogle Antigravity
importgraphanalyzer
$19.99
One-time license
Architecture Decisions
Migration Strategy Brief
Builds an architecture review package for migration strategy brief work, turning system diagram, service notes, or design proposal, runtime boundaries and dependency map, and latency, reliability, data, or ownership constraints into migration service-boundary responsibility map, strategy tradeoff and failure-mode review, and brief architecture decision handoff.
Claude CodeCodexOpenClawGoogle Antigravity
migrationstrategybrief
$19.99
One-time license
Code Quality & Refactoring
Naming Convention Audit
Builds a code-quality repair plan for naming convention audit work, turning code excerpts, dependency map, or static-analysis notes, complexity, duplication, or naming concerns, and risk tolerance and test coverage context into naming code smell classification, convention refactor sequencing plan, and audit test and blast-radius guardrail.
Claude CodeCodexOpenClawGoogle Antigravity
namingconventionaudit
$19.99
One-time license
AI Engineering
Prompt Regression Suite Builder
Builds an agent-engineering review artifact for prompt regression suite builder work, turning agent workflow, prompt, tool, or eval artifact, expected behavior and failure examples, and model, tool-call, and approval constraints into prompt tool-contract boundary check, regression prompt or evaluation failure mode, and suite agent implementation acceptance test.
Claude CodeCodexOpenClawGoogle Antigravity
promptregressionsuite
$19.99
One-time license
Frontend & UI Development
Responsive Design Audit
Builds a review report for responsive design audit work, using responsive, design, audit, and frontend evidence to produce breakpoint behavior matrix, layout overflow risk, and touch-target and viewport QA.
Claude CodeCodexOpenClawGoogle Antigravity
responsivedesignaudit
$19.99
One-time license
Architecture Decisions
Service Boundary Analysis
Builds an architecture review package for service boundary analysis work, turning system diagram, service notes, or design proposal, runtime boundaries and dependency map, and latency, reliability, data, or ownership constraints into service service-boundary responsibility map, boundary tradeoff and failure-mode review, and analysis architecture decision handoff.
Claude CodeCodexOpenClawGoogle Antigravity
serviceboundaryanalysis
$19.99
One-time license
Product Documentation & Onboarding
Setup Guide Writer
Builds a product documentation artifact for setup guide writer work, turning feature, API, setup, or onboarding source, target reader and first-success moment, and known errors, prerequisites, and support paths into first-run path, prerequisite verification, and successful-install checkpoint.
Claude CodeCodexOpenClawGoogle Antigravity
setupguidewriter
$19.99
One-time license
Architecture Decisions
System Design Review
Builds an architecture review package for system design review work, turning system diagram, service notes, or design proposal, runtime boundaries and dependency map, and latency, reliability, data, or ownership constraints into system service-boundary responsibility map, design tradeoff and failure-mode review, and review architecture decision handoff.
Claude CodeCodexOpenClawGoogle Antigravity
systemdesignreview
$19.99
One-time license
Product Documentation & Onboarding
Troubleshooting Guide Writer
Builds a product documentation artifact for troubleshooting guide writer work, turning feature, API, setup, or onboarding source, target reader and first-success moment, and known errors, prerequisites, and support paths into symptom-to-cause tree, diagnostic command path, and known-fix escalation ladder.
Claude CodeCodexOpenClawGoogle Antigravity
troubleshootingguidewriter
$19.99
One-time license
Frontend & UI Development
UI State Coverage Audit
Builds a review report for ui state coverage audit work, using state, coverage, audit, and frontend evidence to produce component state inventory, empty loading error success coverage, and interaction-state QA gaps.
Claude CodeCodexOpenClawGoogle Antigravity
uistatecoverage
$19.99
One-time license
Bundles