By Liohtml
Product management skills — continuous discovery, strategy red-teaming, prioritization frameworks, PRDs, pricing, A/B analysis, positioning, and metrics.
Analyze A/B test results with statistical significance, sample size validation, confidence intervals, and ship/extend/stop recommendations. Use when evaluating experiment results, checking if a test reached significance, interpreting split test data, or deciding whether to ship a variant.
Analyze competitors with strengths, weaknesses, and differentiation opportunities. Identifies direct competitors and maps the competitive landscape. Use when doing competitive research, preparing a competitive brief, or finding differentiation opportunities.
Create a Product Requirements Document using a comprehensive 8-section template covering problem, objectives, segments, value propositions, solution, and release planning. Use when writing a PRD, documenting product requirements, preparing a feature spec, or reviewing an existing PRD.
The method for finding the gap between what a system is supposed to do and what the code actually does — the class of bug generic scanners miss because they have no model of intent. Defines what counts as documented intent, what counts as implementation evidence, which mismatches matter, and how to avoid hand-wavy findings. Use when auditing AI-built code, reviewing access control against documented permissions, or checking whether a codebase matches its own documentation.
Create a structured customer interview script with JTBD probing questions, warm-up, core exploration, and wrap-up sections. Follows The Mom Test principles — no leading questions, no pitching, focus on past behavior. Use when preparing for user interviews, creating interview guides, or planning discovery research.
Own this plugin?
Verify ownership to unlock analytics, metadata editing, and a verified badge. GitHub access is read-only (username + org membership).
Sign in to claimOwn this plugin?
Verify ownership to unlock analytics, metadata editing, and a verified badge. GitHub access is read-only (username + org membership).
Sign in to claimBased on adoption, maintenance, documentation, and repository signals. Not a security audit or endorsement.
One opinionated, deduplicated marketplace of the best Claude Code skills — distilled from five community skill repos (109 skills → 39 keepers) and regrouped into four discipline plugins: engineering · product · design · research.
This is a curation, not original work. Every skill keeps its original author and license — see NOTICE.md and PROVENANCE.csv. It was assembled by a small team of specialist reviewers (engineer, product/marketing, UX, repo expert) with a devil's-advocate pass to cut redundancy.
| Plugin | Skills | License | Focus |
|---|---|---|---|
engineering | 16 | MIT | Spec → plan → build → test → debug → review → harden → ship |
product | 13 | MIT | Discovery, strategy, prioritization, PRDs, pricing, metrics |
design | 6 | MIT | Anti-slop frontend taste, image-to-code, redesign, UI engineering |
research | 4 | CC-BY-NC-4.0 | Deep research, academic writing, peer review |
⚠️ Mixed licensing.
engineering,product, anddesignare MIT (commercial use OK).researchis CC-BY-NC-4.0 — non-commercial only, isolated in its own plugin so it can be dropped cleanly. SeeNOTICE.md.
# Add this marketplace (from GitHub)
/plugin marketplace add Liohtml/ultimate-skills
# …or from a local clone
/plugin marketplace add /path/to/ultimate-skills
# Then install the plugins you want
/plugin install engineering@ultimate-skills
/plugin install product@ultimate-skills
/plugin install design@ultimate-skills
/plugin install research@ultimate-skills # CC-BY-NC — non-commercial
Each skill activates automatically when its trigger matches your task; you can also name it explicitly (e.g. "use the strategy-red-team skill on this PRD").
| Skill | What it does |
|---|---|
spec-driven-development | Write a spec before coding when requirements are unclear or work is significant. |
planning-and-task-breakdown | Break a spec into ordered, independently verifiable tasks. |
incremental-implementation | Ship multi-file changes as small, safe vertical slices. |
test-driven-development | Drive logic and bug-fixes with tests; prove code works. |
debugging-and-error-recovery | Systematic root-cause debugging when things break. |
code-review-and-quality | Multi-axis review with severity labels before merge. |
code-simplification | Refactor for clarity without changing behavior. |
security-and-hardening | Harden input handling, auth, storage, and integrations (incl. LLM). |
performance-optimization | Measure-first optimization, budgets, Core Web Vitals. |
api-and-interface-design | Stable, contract-first API and module-boundary design. |
git-workflow-and-versioning | Commits, branching, conflicts, bisect-driven debugging. |
ci-cd-and-automation | Quality-gated build/deploy pipelines and rollout/rollback. |
doubt-driven-development | In-flight fresh-context adversarial review of key decisions. |
documentation-and-adrs | ADRs, READMEs, and changelogs that record context. |
browser-testing-with-devtools | Verify behavior in a real browser via Chrome DevTools MCP. |
karpathy-guidelines | Lightweight behavioral rules to avoid common LLM-coding mistakes. |
| Skill | What it does |
|---|---|
strategy-red-team | Steelman then attack a PRD/roadmap's load-bearing assumptions. |
opportunity-solution-tree | Torres-style discovery: outcome → opportunities → solutions → experiments. |
prioritization-frameworks | 9 frameworks (RICE, ICE, Kano, MoSCoW…) with formulas and when-to-use. |
pre-mortem | Imagine the launch failed; triage Tigers / Paper Tigers / Elephants. |
create-prd | 8-section Product Requirements Document. |
pricing-strategy | Pricing models, value metric, Van Westendorp, experiments. |
ab-test-analysis | Significance, sample size, SRM, guardrails → ship/extend/stop. |
north-star-metric | Define the NSM + input-metric constellation by business game. |
value-proposition | 6-part JTBD value-proposition design. |
competitor-analysis | Research-driven competitive landscape and differentiation. |
interview-script | Mom-Test / JTBD customer-discovery interview script. |
user-personas | Research-grounded personas with JTBD, pains, gains. |
intended-vs-implemented | Audit the gap between intended behavior and shipped code. |
npx claudepluginhub liohtml/ultimate-skills --plugin productDesign & frontend-taste skills — brief-aware design direction, image-to-code, redesign audits, design-reference image generation, and production UI engineering.
Production-grade engineering skills for AI coding agents — spec, plan, build incrementally, test-drive, debug to root cause, review, harden, optimize, and ship.
Rigorous research & academic-writing pipelines — universal deep-research, multi-agent paper writing, peer-review simulation, and the full research orchestrator. Self-contained across the 4 research skills; some notes cite the upstream project's design docs for context only.
Comprehensive skill pack with 66 specialized skills for full-stack developers: 12 language experts (Python, TypeScript, Go, Rust, C++, Swift, Kotlin, C#, PHP, Java, SQL, JavaScript), 10 backend frameworks, 6 frontend/mobile, plus infrastructure, DevOps, security, and testing. Features progressive disclosure architecture for 50% faster loading.
UI/UX design intelligence. 67 styles, 161 palettes, 57 font pairings, 25 charts, 15 stacks (React, Next.js, Vue, Svelte, Astro, SwiftUI, React Native, Flutter, Tailwind, shadcn/ui, Nuxt, Jetpack Compose). Actions: plan, build, create, design, implement, review, fix, improve, optimize, enhance, refactor, check UI/UX code. Projects: website, landing page, dashboard, admin panel, e-commerce, SaaS, portfolio, blog, mobile app. Elements: button, modal, navbar, sidebar, card, table, form, chart. Styles: glassmorphism, claymorphism, minimalism, brutalism, neumorphism, bento grid, dark mode, responsive, skeuomorphism, flat design. Topics: color palette, accessibility, animation, layout, typography, font pairing, spacing, hover, shadow, gradient.
This skill should be used when users need to generate ideas, explore creative solutions, or systematically brainstorm approaches to problems. Use when users request help with ideation, content planning, product features, marketing campaigns, strategic planning, creative writing, or any task requiring structured idea generation. The skill provides 30+ research-validated prompt patterns across 14 categories with exact templates, success metrics, and domain-specific applications.
Develop, test, build, and deploy Godot 4.x games with Claude Code. Includes GdUnit4 testing, web/desktop exports, CI/CD pipelines, and deployment to Vercel/GitHub Pages/itch.io.
Upstash Context7 MCP server for up-to-date documentation lookup. Pull version-specific documentation and code examples directly from source repositories into your LLM context.
A growing collection of Claude-compatible academic workflow bundles. Covers scientific figures, manuscript writing and polishing, reviewer assessment, citation retrieval, data availability, paper reading, literature search, response letters, paper-to-PPTX conversion, and evidence-grounded Chinese invention patent drafting. Rules are organized as reusable skill folders with explicit workflows and quality checks.