Engineering
#1 · 316,504 repository stars
Test-Driven Development
Builds features through small test-first steps at agreed public interfaces, rather than testing private implementation details.
mattpocock/skills
Stars checked: 2026-11-06
AGENT SKILLS DIRECTORY
Popular on GitHub.
Explained in detail.
Discover highly starred skill repositories for Claude Code, Codex and other agents. Read a practical guide before choosing a workflow.
10 featured repositories · 69 detailed guidesGitHub stars checked: 2026-11-11
How this selection works
The featured list ranks ten eligible skill-first repositories from our reviewed GitHub search sample. We searched repository names and descriptions for “agent skills”, “claude skills” and “codex skills”, sorted by stars, then checked publisher READMEs and selected SKILL.md files. Application collections, resource lists and instruction-only projects are outside this selection. This is not an exhaustive ranking of all GitHub projects.
Stars belong to the entire repository, not to the individual skill shown. One representative skill is featured per repository, so large collections do not occupy every position. Counts are dated snapshots from GitHub’s API and can change. Popularity is not a quality, compatibility or security certification.
A skill packages task instructions in SKILL.md, sometimes with scripts, references and assets. No skills are installed or executed by this website. Additional existing guides remain below.
Popular skill repositories
One representative skill per repository, ordered by repository stars.
Debugging
#2 · 313,515 repository stars
Systematic Debugging
Investigates reproducible failures, traces the cause and verifies a focused fix before declaring the bug resolved.
obra/superpowers
Stars checked: 2026-11-06
Research
#3 · 298,453 repository stars
Deep Research
Turns a research question into a sourced report by searching multiple angles, reading key pages and separating evidence from inference.
affaan-m/ECC
Stars checked: 2026-11-06
Design
#4 · 188,114 repository stars
Frontend Design
Helps an agent develop a deliberate visual identity for a new interface or an existing redesign. It focuses on typography, palette, layout, content and avoiding generic templates.
anthropics/skills
Stars checked: 2026-11-06
Communication
#5 · 117,979 repository stars
Caveman
Makes agent replies shorter while preserving exact technical facts, commands, identifiers and consequential instructions.
JuliusBrussee/caveman
Stars checked: 2026-11-06
Code Quality
#6 · 113,700 repository stars
Code Simplification
Reduces unnecessary complexity in working code while preserving inputs, outputs, side effects and error behavior.
addyosmani/agent-skills
Stars checked: 2026-11-06
Frontend Design
#7 · 111,161 repository stars
Taste Skill
Guides website art direction using a prescribed visual system, supporting assets and browser-based checks.
Leonxlnx/taste-skill
Stars checked: 2026-11-06
Diagrams
#8 · 94,165 repository stars
Archify
Creates standalone interactive HTML diagrams and structured explainers from requirements, Mermaid or repository evidence.
tt-a1i/archify
Stars checked: 2026-11-06
Research
#9 · 66,836 repository stars
Last 30 Days
Researches recent discussion and evidence across configured web and community sources, then synthesizes attributed findings.
mvanhorn/last30days-skill
Stars checked: 2026-11-06
Writing
#10 · 65,583 repository stars
Humanizer
Edits formulaic AI-sounding prose while preserving supported facts, citations and the writer’s intended voice.
blader/humanizer
Stars checked: 2026-11-06
More guides: Claude Code
Documents
188,114 repository stars
Word Documents
Creates, reads and edits Word documents and templates, including headings, tables, images, comments and tracked changes. Useful for structured reports and edits that must remain in .docx format.
anthropics/skills
Stars checked: 2026-11-06
Integrations
188,114 repository stars
MCP Builder
Guides creation of Model Context Protocol servers so agents can use external services through clear, typed tools. Useful when an API exists but the agent lacks an appropriate integration.
anthropics/skills
Stars checked: 2026-11-06
Skill Authoring
188,114 repository stars
Skill Creator
Helps turn a repeated task into a reusable skill, then improves its instructions and triggering with evaluation prompts and feedback.
anthropics/skills
Stars checked: 2026-11-06
Testing
188,114 repository stars
Web App Testing
Provides a repeatable way to inspect and test local web applications with Python Playwright. Useful for broken interactions, UI regressions, screenshots and browser logs.
anthropics/skills
Stars checked: 2026-11-06
More guides: Codex
Agent Development
7,787 repository stars
Agents SDK App Builder
Turns an idea or existing project into a runnable OpenAI Agents SDK application. Covers a small prototype, focused evaluations and local deployment when requested.
openai/plugins
Stars checked: 2026-11-06
Testing
7,787 repository stars
Frontend Testing & Debugging
Tests and diagnoses rendered frontend behavior within the Build Web Apps plugin workflow. It is suited to responsive layout defects, broken controls, console errors and visual regressions.
openai/plugins
Stars checked: 2026-11-06
Apple Development
7,787 repository stars
SwiftUI Performance Audit
Investigates slow SwiftUI rendering, janky scrolling, excessive updates, CPU spikes and memory pressure. Starts from code before requesting runtime profiling evidence.
openai/plugins
Stars checked: 2026-11-06
More guides: Skills-compatible agents
Coordination
321,504 repository stars
Chief of Staff — Experimental
Keeps a durable project picture while a long-running agent coordinates bounded work through specialist agents.
mattpocock/skills
Stars checked: 2026-11-11
Session continuity
321,504 repository stars
Claude Handoff — Experimental
Transfers a focused task to a named background Claude session using a redacted file-based brief.
mattpocock/skills
Stars checked: 2026-11-11
Workflow design
321,504 repository stars
Loop Me — Experimental
Interviews the user to turn recurring work into implementable workflow specifications, with concrete checkpoints.
mattpocock/skills
Stars checked: 2026-11-11
Architecture boundaries
321,504 repository stars
Setup TypeScript Deep Modules — Experimental
Adds executable import-boundary checks around package entry points using dependency-cruiser.
mattpocock/skills
Stars checked: 2026-11-11
Automation architecture
321,504 repository stars
Software Factory — Experimental
Defines tasks, triggers, runs and service responsibilities before designing a ticket-to-code automation system.
mattpocock/skills
Stars checked: 2026-11-11
Editorial structure
321,504 repository stars
Writing Beats — Experimental
Builds an article one selected narrative move at a time while tracking what the reader already understands.
mattpocock/skills
Stars checked: 2026-11-11
Idea development
321,504 repository stars
Writing Fragments — Experimental
Captures usable raw writing through an interview without prematurely imposing an outline.
mattpocock/skills
Stars checked: 2026-11-11
Git workflow
318,785 repository stars
Git Guardrails for Claude Code Bash Calls
Configures a Claude Code PreToolUse hook that rejects selected dangerous Git command patterns before its Bash tool runs them.
mattpocock/skills
Stars checked: 2026-11-09
Requirements discovery
318,785 repository stars
Grilling: Resolve a Decision Tree With the User
Interviews the decision owner in dependency-aware rounds until the plan’s important branches are explicit.
mattpocock/skills
Stars checked: 2026-11-09
TypeScript testing
318,785 repository stars
Replace Test Fixture Casts With Shoehorn
Reworks TypeScript test fixtures to distinguish partial valid data from intentionally invalid inputs using Shoehorn helpers.
mattpocock/skills
Stars checked: 2026-11-09
Course authoring
318,785 repository stars
Scaffold Numbered Course Exercises
Creates ordered exercise directories and meaningful starter files that match the publisher’s course-lint conventions.
mattpocock/skills
Stars checked: 2026-11-09
Project configuration
318,785 repository stars
Configure the Engineering Skills for Your Repository
Records the project’s issue tracker, triage vocabulary and domain-document layout so the engineering collection follows local conventions.
mattpocock/skills
Stars checked: 2026-11-09
Developer tooling
318,785 repository stars
Configure Staged Formatting and Commit Checks
Sets up Husky and lint-staged so formatting runs on staged files before existing type checks and tests.
mattpocock/skills
Stars checked: 2026-11-09
Async collaboration
318,785 repository stars
Create a Discovery Questionnaire for an Expert
Turns a knowledge gap into a focused Markdown questionnaire that one informed recipient can answer asynchronously.
mattpocock/skills
Stars checked: 2026-11-09
Communication
318,785 repository stars
Wait, What? Re-explain the Last Message
Reframes an explanation with missing context, simpler technical English and the project’s established vocabulary.
mattpocock/skills
Stars checked: 2026-11-09
Agent documentation
318,785 repository stars
Write Predictable Instructions for Agents
Organizes agent-facing documents around clear triggers, ordered work and checkable completion criteria while reducing duplicated guidance.
mattpocock/skills
Stars checked: 2026-11-09
Writing
318,785 repository stars
Shape Raw Notes Into an Article — Beta
Builds an article from a fixed Markdown source pile through agreed openings and paragraph-by-paragraph decisions.
mattpocock/skills
Stars checked: 2026-11-09
Workflow selection
317,905 repository stars
Ask Matt: Choose the Right Workflow
Routes a development situation to the collection’s relevant skill and explains which planning, implementation or diagnostic steps the work needs.
mattpocock/skills
Stars checked: 2026-11-08
Context transfer
317,905 repository stars
Handoff: Carry Context Into a Fresh Session
Creates a targeted temporary handoff document so another session can continue with the right decisions, evidence and next task.
mattpocock/skills
Stars checked: 2026-11-08
Implementation
317,905 repository stars
Implement One Agreed Ticket
Executes one identified ticket through agreed test seams, regular focused checks and final code review.
mattpocock/skills
Stars checked: 2026-11-08
Code review
317,905 repository stars
PR Description With Evidence and Merge Risk
Writes a concise pull request body around the smallest useful visual, before-and-after evidence and the consequences of merging.
mattpocock/skills
Stars checked: 2026-11-08
Developer workflow
317,905 repository stars
Retro: Improve the Agent Environment
Uses evidence from a completed session to propose focused improvements to navigation, checks, instructions and tools.
mattpocock/skills
Stars checked: 2026-11-08
Learning
317,905 repository stars
Teach: Build a Persistent Learning Workspace
Organizes an adaptive learning project around an agreed mission, source material, interactive lessons and recorded learner progress.
mattpocock/skills
Stars checked: 2026-11-08
Project planning
317,905 repository stars
Split a Spec Into Demoable Tickets
Translates an agreed specification into vertical implementation slices with explicit blocking relationships.
mattpocock/skills
Stars checked: 2026-11-08
Issue management
317,905 repository stars
Triage Incoming Issues With Evidence
Investigates incoming reports and requests before recommending an actionable brief, a request for information or closure.
mattpocock/skills
Stars checked: 2026-11-08
Decision planning
317,905 repository stars
Wayfinder: Map Decisions Across Sessions
Maintains a shared map of unresolved decisions for an initiative too large and uncertain for one session.
mattpocock/skills
Stars checked: 2026-11-08
Infrastructure setup
317,905 repository stars
Wizard: Guide Human-Only Setup Steps
Authors an interactive Bash procedure for the manual dashboard, credential or cutover steps a human must perform.
mattpocock/skills
Stars checked: 2026-11-08
Code review
316,907 repository stars
Code Review: Standards and Spec
Reviews a fixed Git diff separately for repository standards and fidelity to the originating specification, so one kind of correctness cannot conceal the other.
mattpocock/skills
Stars checked: 2026-11-07
Architecture
316,907 repository stars
Codebase Design: Deep Modules
Helps design small, useful module interfaces that hide real complexity and provide a stable place to test observable behavior.
mattpocock/skills
Stars checked: 2026-11-07
Debugging
316,907 repository stars
Diagnosing Bugs
Turns a difficult bug or performance regression into a repeatable feedback loop before attempting a cause or fix.
mattpocock/skills
Stars checked: 2026-11-07
Requirements
316,907 repository stars
Domain Modeling and Project Glossaries
Resolves ambiguous business terms against concrete scenarios and records precise definitions separately from implementation decisions.
mattpocock/skills
Stars checked: 2026-11-07
Requirements
316,907 repository stars
Grill With Docs
Combines a structured design interview with live glossary and decision-record maintenance so agreed terminology survives the conversation.
mattpocock/skills
Stars checked: 2026-11-07
Engineering
316,907 repository stars
Implement a Spec as a Task Graph
Coordinates a specified feature across dependent tickets on one integration branch, with isolated implementers and a final review.
mattpocock/skills
Stars checked: 2026-11-07
Architecture
316,907 repository stars
Improve Codebase Architecture
Surveys a focused area for costly shallow modules, presents visual refactoring candidates, then explores the user’s chosen opportunity.
mattpocock/skills
Stars checked: 2026-11-07
Prototyping
316,907 repository stars
Prototype a Design Question
Builds a deliberately disposable experiment to answer either a state-model question or a visual interface question before production implementation.
mattpocock/skills
Stars checked: 2026-11-07
Research
316,907 repository stars
Primary-Source Engineering Research
Investigates a bounded technical question through authoritative sources and saves claim-level citations in a repository note.
mattpocock/skills
Stars checked: 2026-11-07
Specification
316,907 repository stars
Turn an Agreed Conversation Into a Spec
Synthesizes an already discussed feature into a structured specification, including user stories, implementation decisions and agreed test seams.
mattpocock/skills
Stars checked: 2026-11-07
Agent coordination
316,020 repository stars
Dispatching Parallel Agents
Splits genuinely independent investigations into self-contained agent tasks, then reviews their combined result.
obra/superpowers
Stars checked: 2026-11-11
Plan execution
316,020 repository stars
Subagent-Driven Development
Executes an agreed plan through fresh task implementers, scoped reviews and a durable progress ledger.
obra/superpowers
Stars checked: 2026-11-11
Instruction authoring
316,020 repository stars
Writing Skills
Applies a test-first cycle to reusable agent instructions using observed failures and pressure scenarios.
obra/superpowers
Stars checked: 2026-11-11
Product design
315,272 repository stars
Brainstorming with Superpowers
Clarifies the intended outcome, compares feasible approaches and turns an ambiguous request into an approved design before implementation.
obra/superpowers
Stars checked: 2026-11-10
Agent observability
315,272 repository stars
Investigating a Superpowers Session
Builds a transcript-backed account of a problematic agent session, with exact evidence and controlled optional export.
obra/superpowers
Stars checked: 2026-11-10
Implementation workflow
315,272 repository stars
Executing Plans in the Current Session
Runs an approved plan task by task in the current agent session, carrying decisions and verification evidence in a persistent ledger.
obra/superpowers
Stars checked: 2026-11-10
Git handoff
315,272 repository stars
Finishing a Development Branch
Verifies the final tree, presents integration choices and cleans up only workspaces the workflow owns after the chosen action succeeds.
obra/superpowers
Stars checked: 2026-11-10
Code review
315,272 repository stars
Evaluating Code Review Feedback
Checks review suggestions against real code, compatibility constraints and user decisions before implementing them.
obra/superpowers
Stars checked: 2026-11-10
Code review
315,272 repository stars
Requesting a Focused Code Review
Packages an exact change range and requirements for a fresh reviewer, then uses severity and evidence to decide what must be fixed.
obra/superpowers
Stars checked: 2026-11-10
Testing
315,272 repository stars
Red–Green–Refactor with Superpowers
Develops behavior through one observed failing test, minimal implementation and a verified refactor at a time.
obra/superpowers
Stars checked: 2026-11-10
Workspace management
315,272 repository stars
Using Git Worktrees Safely
Finds existing workspace isolation before creating a worktree, preferring the coding platform’s managed tools over manual Git fallback.
obra/superpowers
Stars checked: 2026-11-10
Quality assurance
315,272 repository stars
Verification Before Completion
Requires fresh evidence matching the exact claim before reporting a fix, passing tests or completed work.
obra/superpowers
Stars checked: 2026-11-10
Engineering planning
315,272 repository stars
Writing Implementation Plans
Converts an approved specification into small tasks with exact interfaces, behavioral tests and verification commands.
obra/superpowers
Stars checked: 2026-11-10
Web Performance
33,634 repository stars
React Best Practices
Gives coding agents prioritized React and Next.js performance rules. Useful for data-fetching waterfalls, oversized bundles, unnecessary renders and slow server paths.
vercel-labs/agent-skills
Stars checked: 2026-11-06
Accessibility & UX
33,634 repository stars
Web Design Guidelines
Reviews UI code against Vercel’s Web Interface Guidelines, covering accessibility, focus, forms, animation, typography, images and navigation behavior.
vercel-labs/agent-skills
Stars checked: 2026-11-06
Compatibility needs more than a file format.
The Agent Skills standard makes instructions portable across supporting clients. Tools, runtimes, plugins and permissions can still differ. Vercel’s entries are grouped as skills-compatible rather than claimed to be tested on every agent.
Codex sources here use the current OpenAI Plugins repository. The older openai/skills repository marks itself deprecated. Document skills may use different license terms from other skills in the same repository.