Coding standards, frameworks, refactoring, and code review (16.7K skills)
Build MCP servers and clients that connect AI systems to external tools and data. The skill defines validated inputs, implements tool and resource handlers, configures communication methods, and checks protocol behavior with the MCP Inspector.
Implement Kotlin applications with asynchronous tasks, shared code across platforms, Android interfaces, and servers. The skill covers state modeling, cancellation handling, tests, and code checks, with guidance for Compose, Ktor, and Flow data streams.
Review code changes and files for bugs, security risks, performance problems, design issues, and test coverage. Receive a structured report with prioritized findings, concrete improvement examples, positive feedback, and an overall review verdict.
Design REST or GraphQL APIs by defining data relationships, requests, responses, and authentication. Produce OpenAPI specifications, machine-readable API descriptions, with consistent errors, pagination, and versioning plans, then validate contracts using a mock server.
Build and debug mobile apps for iOS and Android with React Native and Expo. Implement navigation, adapt screens to each platform, integrate native modules that access platform features, and improve list rendering, keyboard behavior, and memory use.
Design systems made of independently deployable services, or plan how to split an existing application. The skill produces service boundary diagrams and recommendations for communication, data ownership, failure handling, monitoring, and deployment.
Build PHP 8.3+ applications with Laravel or Symfony, including typed models, services, APIs, and tests. Use static analysis, which checks code without running it, alongside automated tests to verify the implementation.
Build web application features across the interface, API, and database, with authentication, input checks, and safe data handling. The skill guides technical design, implementation, error handling, and component testing in one workflow.
Scan recent merges to main for unfinished tasks, deprecated APIs, broken documentation links, and obsolete feature flags. Get a concise report with file locations, risk, effort, and suggested follow-up actions for each merge.
Review open pull requests, or proposed code changes, for automated checks, approvals, blocking comments, and conflicts. Assess whether project requirements allow merging, and suggest a next step such as a small fix, rebase, or human review.
Scan merges and commits since the previous release to collect user-facing changes for a changelog. Produce structured entries and a summary, with explicit lists of breaking changes and security signals.
Review merged pull requests and significant commits within a release window, then organize features, fixes, breaking changes, and security signals into structured source material for drafting release notes.
Track open pull requests, proposed code changes awaiting integration, and identify blockers in automated checks, reviews, conflicts, and unanswered comments. Receive a prioritized watchlist and the top three actions for a human to take.
Scans merged pull requests and commits since a chosen reference, using titles, labels, milestones, and messages to categorize changes. Produces a release notes draft, highlights breaking changes and security items, and records the scan window.
Review open issues and discussions to create a clear work queue. Record the five highest-priority items, suggested labels, possible duplicates, and cases needing human judgment in a state file for future reviews.
Inspect recent merges for leftover debug code, TODO comments, lint warnings, and technical debt, meaning deferred maintenance work. Create a prioritized cleanup list that separates small fix candidates from issues requiring human judgment.
Scan recent merges, pull requests, and commits for release note material. Produce structured entries and a summary with PR references, highlighting breaking changes and security items while filtering routine dependency and bot noise.
Review open issues and discussions to organize a project's backlog. Identify possible duplicates, suggest priorities and labels, and record the top five actionable items and cases needing human attention in a state file.
Load project rules before an agent starts work, then apply restrictions to file edits, tests, pushes, and merges. Check pause settings and identify actions that require human approval.
Review recent changes, automated test failures, issues, and conversations to prioritize engineering work. Produce a concise report separating urgent actions, watch items, noise, and state updates, with suggested next steps and rough effort estimates.
Reviews recent changes, CI failures, open issues, pull requests, and conversations to produce a prioritized findings report. It separates urgent work from monitoring and noise, suggests next actions, and records facts for the next automated review cycle.
Fix one clearly defined code issue, such as a failed automated check, review comment, or typo, with the smallest necessary change. Run relevant tests and summarize the changes, verification results, and any need for human review.
Build the user interface for a holaOS app whose data resources are already connected through the SDK. Choose a feed, table, kanban board, form, or calendar layout using shared components and workspace styling.
Create or update reusable Codex skills by turning concrete task examples into concise instructions. Follow a defined folder layout and SKILL.md template, validate the skill through an actual invocation, and refine it using feedback.