Agent
You are a Senior Staff Engineer with 15+ years of experience shipping software at scale. You have seen every mistake, anti-pattern, and shortcut. You review code not just for correctness, but for maintainability, operability, and team velocity over the long term.
Agent
You are a Security Engineer with deep expertise in application security, threat modeling, and vulnerability assessment. You think like an attacker while building like an engineer. You are pragmatic—you understand that perfect security is impossible, but known vulnerabilities are unacceptable.
Agent
You are a QA Specialist with deep expertise in software testing strategy, test automation, and quality engineering. You believe that testing is not a phase—it is a practice that happens throughout development. You are pragmatic: you know when 100% coverage is unnecessary and when 80% coverage is dangerous.
Skill Claude CodeCodex
Design stable, evolvable APIs and interfaces using contract-first methodology, rigorous boundary validation, and versioning strategies that respect Hyrum's Law.
Skill Claude CodeCodex
Acts as a Principal Software Architect. Enforces mandatory architecture-first workflow before any implementation. ALWAYS trigger this skill when the user wants to build, create, design, architect, or spec out any system, app, API, service, platform, or product — even if they phrase it casually ("build me an app", "I…
Skill Claude CodeCodex
Test web applications in real browsers via Chrome DevTools Protocol including DOM inspection, console analysis, network profiling, performance auditing, Lighthouse CI, and visual regression.
Skill Claude CodeCodex
Automates CI/CD pipeline setup. Use when setting up or modifying build and deployment pipelines. Use when you need to automate quality gates, configure test runners in CI, or establish deployment strategies.
Skill Claude CodeCodex
Multi-axis code review framework that evaluates every change across five distinct dimensions: correctness, security, performance, maintainability, and style. Enforces change sizing, severity labeling, and review velocity norms so that reviews are thorough without becoming bottlenecks.
Skill Claude CodeCodex
Disciplined code simplification that reduces complexity without changing behavior. Combines quantitative complexity metrics (cyclomatic, cognitive), the Rule of 500, Chesterton's Fence, and proven refactoring patterns to produce code that is smaller, faster to read, and safer to modify.
Skill Claude CodeCodex
Optimize agent context setup for maximum performance, accuracy, and cost-efficiency across long sessions and complex tasks.
Skill Claude CodeCodex
Systematic five-step triage for diagnosing, isolating, and fixing software defects. Covers everything from initial reproduction to post-mortem documentation. Designed to replace guesswork with a repeatable forensic process.
Skill Claude CodeCodex
Manages deprecation and migration. Use when removing old systems, APIs, or features. Use when migrating users from one implementation to another. Use when deciding whether to maintain or sunset existing code.
Skill Claude CodeCodex
Records decisions and documentation. Use when making architectural decisions, changing public APIs, shipping features, or when you need to record context that future engineers and agents will need to understand the codebase.
Skill Claude CodeCodex
Subject every non-trivial decision to systematic adversarial review before it stands, using cross-model validation, risk classification, and structured reconciliation.
Skill Claude CodeCodex
Build production-grade user interfaces with component architecture, design systems, state management, accessibility compliance, responsive design, and performance budgets.
Skill Claude CodeCodex
Trunk-based development with atomic commits, disciplined versioning, and a forensic bisect workflow. Covers commit granularity, branch naming, conventional commits, semver, merge strategies, and the git bisect workflow for finding regressions. Designed to make git log a reliable audit trail and git bisect a reliable…
Skill Claude CodeCodex
Structured divergent and convergent thinking process to transform raw, vague ideas into sharp, actionable concepts. Integrates SCAMPER, Six Thinking Hats, and multi-cycle divergence/convergence for robust idea development.
Skill Claude CodeCodex
Delivers changes in thin, independently verifiable vertical slices. Each slice is a complete, testable increment that adds user-facing value. Feature flags, safe defaults, rollback plans, strict commit discipline, and integration testing at every slice prevent the "big bang" merge disaster.
Skill Claude CodeCodex
One-question-at-a-time interview skill that extracts what the user actually wants instead of what they think they should want. Uses structured questioning to surface hidden assumptions, constraints, and true intent before any work begins.
Skill Claude CodeCodex
Measure-first performance optimization that targets Core Web Vitals, runtime efficiency, and scalability. Covers profiling workflows, bundle analysis, lazy loading, caching strategies, database query optimization, and anti-pattern detection. Every optimization is driven by data, not instinct.
Skill Claude CodeCodex
Decomposes spec-driven specifications into small, independently verifiable tasks with explicit dependency ordering, acceptance criteria, effort estimation, and clear ownership. Ensures no task is larger than one day and every task has a definition of done.
Skill Claude CodeCodex
Systematic application of security controls across the entire software development lifecycle. Covers OWASP Top 10 prevention, authentication patterns, secrets management, dependency auditing, input validation, and a three-tier security boundary system that enforces defense in depth.
Skill Claude CodeCodex
Prepares production launches. Use when preparing to deploy to production. Use when you need a pre-launch checklist, when setting up monitoring, when planning a staged rollout, or when you need a rollback strategy.
Skill Claude CodeCodex
Ground every implementation decision in official documentation, version-specific references, and verifiable sources to eliminate hallucinated APIs and outdated patterns.