Agent Skills

Free AI agent skills from GitHub, tested by a small, cheap model (Haiku). Further right means Haiku used it right more often.

How a skill is tested

A skill is a file that teaches an AI coding agent how to do one job. We test each one with a small, cheap model (Haiku), because if a small model gets it right, a big one will too.

  1. Picked right. Haiku sees the list of skills, like a real agent does, and gets 3 requests: 2 where this skill should be used and 1 that only sounds similar. It scores a point for each request it sends the right way.
  2. Followed right. Haiku reads the whole skill and a real request, then says its first step. A second Haiku call checks that step against the one the skill asks for.

Score: 1 point per request picked right (3) plus 2 points for following right, out of 5, shown out of 100. Further right is better. Green is 80 and up, amber 50 to 79, red below 50. Pick a kind of skill to see them as a leaderboard, best first. Haiku only sees skills from the same repo when it picks, as if you had installed that one collection. The test questions were written from each skill's own text by a stronger model, so a skill is never graded on something it does not claim to do. Last run: claude-haiku-4-5-20251001, 2026-10-28.

The same skills as a table
SkillFromWhat it doesScorePicked rightFollowed right
brainstorming obra/superpowersFind out what you really want before building: ask, compare approaches, write and approve a design doc. 100 3/3 1/1
writing-plans obra/superpowersTurn a spec into a step-by-step plan with exact files, tests and commands for a new engineer. 60 3/3 0/1
autoplan garrytan/gstackRun the CEO, design, eng and DX plan reviews in a row, auto-deciding with 6 rules and one final gate. 100 3/3 1/1
office-hours garrytan/gstackFounder-style questioning to pin down the real problem and write a design doc, no code yet. 80 2/3 1/1
plan-ceo-review garrytan/gstackReview a plan like a founder: expand, hold or cut scope, and test edge cases and failure paths. 100 3/3 1/1
plan-design-review garrytan/gstackReview a plan's UI and design choices before building, interactively, with scores. 100 3/3 1/1
plan-devex-review garrytan/gstackReview a plan for developer experience: SDK, CLI help, getting started, onboarding. 60 3/3 0/1
plan-eng-review garrytan/gstackReview a plan like an eng manager: scope, architecture, tests, edge cases, with a test diagram. 100 3/3 1/1
spec garrytan/gstackInterrogate a vague request in five phases until it becomes a precise, backlog-ready spec issue. 60 3/3 0/1
codebase-design mattpocock/skillsShared words and rules for deep modules: small interface, lots of behaviour, clean seams. 60 3/3 0/1
grill-with-docs mattpocock/skillsGet grilled on your plan, while the agent writes the glossary and ADRs as you go. 60 3/3 0/1
prototype mattpocock/skillsMake throwaway code that answers a design question: a state-logic page or several UI variants. 60 3/3 0/1
to-spec mattpocock/skillsTurn the current chat into a spec and publish it to the issue tracker, no more interview. 100 3/3 1/1
to-tickets mattpocock/skillsSplit a plan or spec into thin vertical tickets, each saying which tickets block it. 100 3/3 1/1
triage mattpocock/skillsMove issues and outside PRs through triage states, check them, and write briefs agents can follow. 100 3/3 1/1
wayfinder mattpocock/skillsPlan a job too big for one session as a map of decision tickets, settled one by one. 60 3/3 0/1
grill-me mattpocock/skillsGet interviewed hard about your plan or design until everything is clear. 20 1/3 0/1
grilling mattpocock/skillsQuestion the user round by round down a decision tree, with a suggested answer for each question. 60 1/3 1/1
api-design-principles wshobson/agentsDesign REST or GraphQL APIs: resources, verbs, versions, pagination, errors. 60 3/3 0/1
migration-architect alirezarezvani/claude-skillsPlan zero-downtime migrations with compat checks and rollback plans. 60 3/3 0/1
spec-driven-workflow alirezarezvani/claude-skillsWrite the spec and acceptance rules first, make tests from it, then code. 100 3/3 1/1
api-designer Jeffallan/claude-skillsDesign REST or GraphQL APIs with resource models, OpenAPI and error standards. 60 3/3 0/1
architecture-designer Jeffallan/claude-skillsDesign system architecture, draw Mermaid diagrams, write ADRs, weigh trade-offs. 20 1/3 0/1
feature-forge Jeffallan/claude-skillsRun a requirements workshop and write user stories, EARS rules, acceptance tests. 80 2/3 1/1
the-fool Jeffallan/claude-skillsPlay devil's advocate: pre-mortem, red team and assumption checks on a plan. 80 2/3 1/1
search-first affaan-m/everything-claude-codeResearch existing libraries and tools before writing custom code. 60 3/3 0/1
hexagonal-architecture affaan-m/everything-claude-codeDesign ports and adapters: domain core, use cases, testable boundaries. 60 3/3 0/1
project-development muratcankoylan/Agent-Skills-for-Context-EngineeringPlan LLM projects: task fit, pipeline stages, cost math, single vs multi agent. 100 3/3 1/1
flisk-layout flisk-sh/flisk-skillsDecide where a Flisk project lives across repos and teams, and handle name and port clashes, CODEOWNERS and layouts for 5, 20 and 50 services. 100 3/3 1/1