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Developer GuideMarch 2026·8 min read

Happycapy Skills for Claude Code: Complete Developer Installation Guide (2026)

The Happycapy-skills repository gives Claude Code developers 15+ production-ready skill packs — PDF extraction, AI image generation, Supabase best practices, and more — that install in under 30 seconds and cut token usage by 60%. Here is the full guide: what skills are, how to install them both ways, every skill explained, and real performance numbers.

TL;DR

Happycapy skills are plain-text SKILL.md files that extend Claude Code with domain expertise. Install via npx skills add https://github.com/happycapy-ai/Happycapy-skills or clone to ~/.claude/skills/. 15+ skills across 6 categories. No executable code. No supply chain risk. Works with Claude Code, Cursor, Gemini CLI. 60% average token reduction. 100,000+ active developers as of March 2026.

15+
Production-ready skills
60%
Token reduction (avg)
100k+
Active developers (Mar 2026)
6
Skill categories

What Are Happycapy Skills (and Why Claude Code Needs Them)

Out of the box, Claude Code is a general-purpose coding agent. It knows software patterns, can browse the web, and runs shell commands. But it does not know the exact API surface of Supabase Postgres, the optimal PPTX generation approach, or the best practices for Three.js performance optimization — not without you explaining them in every session.

Happycapy skills fix this. Each skill is a self-contained SKILL.md file that loads into Claude Code's context when you start a relevant task. The file contains expert-level instructions, patterns, and examples for that domain — written and validated by practitioners, not generated from training data.

Skills use progressive disclosure: only the skills relevant to your current task load into context. This is why token usage drops ~60% compared to dumping a full system prompt for every session.

Skills vs prompts vs custom scripts
A prompt tells Claude what to do once. A skill teaches Claude a domain permanently — across every session, every project, without re-explaining. Skills also live in version control and are shareable across a team.

Two Ways to Install Happycapy Skills

Both methods take under 30 seconds. Choose based on whether you want automatic updates.

Method 1: npx (Recommended — one command)

The npx method installs skills into ~/.claude/skills/ automatically and handles directory creation. Run this from any terminal:

# Install all skills from the official repository
npx skills add https://github.com/happycapy-ai/Happycapy-skills

You can also install individual skills by name if you only want specific ones:

# Install a single skill
npx skills add pdf
npx skills add supabase-postgres-best-practices
npx skills add ai-image-generation

Method 2: Git clone (Best for staying updated)

Clone directly into ~/.claude/skills/. Run git pull whenever the upstream repo adds new skills:

# Clone and install
git clone https://github.com/happycapy-ai/Happycapy-skills ~/.claude/skills/
# Pull updates later
cd ~/.claude/skills && git pull

Verify installation

Skills activate immediately in the next Claude Code session. To verify, list your skills directory:

ls ~/.claude/skills/
# Should show: pdf/ pptx/ ai-image-generation/ supabase-postgres-best-practices/ ...

All 15+ Skills: What Each One Does

The repository organizes skills into six categories. Here is every skill, what it adds to Claude Code, and the real-world use case it solves.

1. Document Processing (2 skills)

pdf
PDF Reading & Extraction
Extracts text, tables, and metadata from PDF files with layout preservation. Handles scanned PDFs via OCR fallback. Supports multi-page batch processing. Use case: contract review, research paper parsing, invoice data extraction.
pptx
PowerPoint Generation & Editing
Creates and modifies PPTX files with precise slide layout, font, and color control. Handles master slide inheritance and speaker notes. Use case: automated report decks, client presentations, data-to-slide pipelines.

2. AI Content Creation (3 skills)

ai-image-generation
AI Image Generation
Wraps FLUX, Gemini, Grok, and Seedream models with prompt engineering best practices. Handles aspect ratios, style presets, and batch generation. Use case: product mockups, blog hero images, social media visuals.
ai-video-generation
AI Video Generation
Orchestrates video generation models (Seedance, Kling, Sora) with script-to-shot breakdown, frame consistency, and duration management. Use case: product demos, faceless YouTube content, social video ads.
canvas-design
Canvas Design System
Applies design system principles to HTML Canvas and SVG output — spacing, color harmony, typography hierarchy. Use case: generating charts, infographics, and visual assets without manual design work.

3. Web Development (3 skills)

next-best-practices
Next.js Best Practices
Enforces RSC boundaries, App Router conventions, metadata patterns, and async API usage. Prevents common Next.js 15+ pitfalls at code generation time. Use case: any Next.js project. This is the most widely used skill in the repository.
3d-web-experience
Three.js / React Three Fiber
Expert-level Three.js and React Three Fiber patterns: scene setup, lighting, camera controls, shader optimization, and performance budgets. Use case: product configurators, portfolio animations, data visualizations.
frontend-slides
Frontend HTML Slide Decks
Generates animation-rich HTML presentations from scratch or converts PPTX files. Handles transitions, code blocks, and responsive layouts. Use case: internal presentations, conference talks, pitch decks.

4. Database (2 skills)

supabase-postgres-best-practices
Supabase / Postgres Optimization
Query optimization, RLS policy patterns, index strategies, and connection pooling for Supabase and vanilla Postgres. Prevents N+1 queries and common schema anti-patterns at write time. Use case: any production database layer.
goplaces
Google Places API Integration
Wraps Google Places API (New) with text search, place details, and review queries via the goplaces CLI. Use case: location-aware apps, business directory features, geospatial data pipelines.

5. Communication (3 skills)

reddit-post-writer
Reddit Post Composer
Writes subreddit-native posts — matching voice, format, and community norms for any target subreddit. Handles both long-form and Ask-style posts. Use case: community marketing, product launches, IH-style build threads.
slack-gif-creator
Slack GIF & Asset Creator
Generates custom GIFs and animated assets sized and optimized for Slack. Handles file size limits, frame rate, and color palette reduction. Use case: team celebrations, automated status updates, bot responses.
video-downloader
Video Download & Extraction
Downloads video from major platforms, extracts frames, and clips segments. Wraps yt-dlp with format selection and subtitle extraction. Use case: content repurposing, training data collection, media analysis.

6. Skill Creation (2 skills)

skill-creator
Generic Skill Builder
Guides Claude through creating new skills from existing documentation, API references, or codebase patterns. Outputs a correctly structured SKILL.md file ready for use. Use case: adding proprietary tools and internal APIs to your Claude Code setup.
happycapy-skill-creator
Happycapy-Specific Skill Builder
Finds and adapts skills from the Happycapy repository for your specific setup. Handles conflicts, naming conventions, and Happycapy platform integration. Use case: customizing official skills for your team's workflow.

Real Performance Data from 100,000+ Developers

These are documented results from teams using Happycapy skills in production, collected from the developer community as of Q1 2026:

Team / Use CaseSkill UsedBeforeAfter
Legal startup — contract reviewpdfManual review, 6h/contract85% reduction in manual review
Marketing agency — campaign asset generationai-image-generation + canvas-design8 hours per campaign90 minutes per campaign
SaaS team — Next.js app performancenext-best-practicesLighthouse 62Lighthouse 94
Solo dev — Supabase query optimizationsupabase-postgres-best-practicesN+1 queries, 800ms p95Indexed queries, 95ms p95
Content team — weekly presentationspptx + frontend-slides4 hours per deck45 minutes per deck

Skills vs Alternatives: What You Actually Get

ApproachSetup timePersists across sessionsToken overheadShareableSupply chain risk
Happycapy skills30 secondsYes~60% reductionYes (text files)None (text only)
Manual system prompt30–60 min per skillOnly if you paste every sessionHigh (full prompt every time)Manual copy/pasteNone
Custom npm extensionHoursYesLowRequires publishingExecutable code risk
No skills (vanilla Claude Code)ZeroNoHighestNoNone

From Claude Code to a Full Persistent Agent

Skills are the first step. They make Claude Code dramatically better for specific tasks. But they still reset between sessions — you re-explain your project, your preferences, your constraints every time.

Happycapy is what skills become when combined with a persistent memory layer. It uses the same Claude model, ships with 150+ skills pre-installed, and remembers your projects, preferences, and decisions across every session. You explain once. After that, it already knows.

For developers who want to go beyond Claude Code — running full agentic workflows, automating file operations via Mac Bridge, receiving results by email via Capymail, or deploying a team of specialized agents — Happycapy is the production version of what skills enable.

Frequently Asked Questions

What are Happycapy skills for Claude Code?
Happycapy skills are self-contained SKILL.md instruction files that extend Claude Code with domain expertise. Each skill adds expert-level knowledge for a specific area — PDF processing, AI image generation, Supabase best practices — without modifying Claude's core behavior. They live in ~/.claude/skills/ and load when relevant tasks are detected.
How do I install Happycapy skills?
Two methods: (1) npx: run npx skills add https://github.com/happycapy-ai/Happycapy-skills from any terminal. (2) Git clone: run git clone https://github.com/happycapy-ai/Happycapy-skills ~/.claude/skills/. Both activate in under 30 seconds.
Do Happycapy skills work with Cursor?
Yes. Skills work with Claude Code, Cursor, Gemini CLI, Codex CLI, and GitHub Copilot — any agent that reads instruction files from ~/.claude/skills/.
Are Happycapy skills safe to install?
Skills are plain text SKILL.md files. There is no executable code, no npm packages, and no shell scripts. You can open and read every file before using it. There is zero supply chain risk by design.
How much do skills reduce token usage?
Skills use progressive disclosure — only relevant instructions load per task. This reduces token usage by approximately 60% compared to pasting full system prompts for every session.
Can I create my own skills?
Yes. The skill-creator and happycapy-skill-creator skills help you build new SKILL.md files from documentation, API references, or codebase patterns. Once created, drop the file into ~/.claude/skills/ and it activates immediately.

Skills + Persistent Memory = Full AI Agent

Happycapy ships with 150+ skills pre-installed and adds persistent memory across sessions. Your projects, preferences, and context — carried forward automatically. No re-explaining.

Try Happycapy Free
Sources:
  • BrightCoding — "Happycapy-skills: 15 Powerful Claude Code Tools" (Mar 24, 2026)
  • Medium — "10 Must-Have Skills for Claude (and Any Coding Agent) in 2026" (Mar 26, 2026)
  • GitHub — happycapy-ai/Happycapy-skills repository
  • Happycapy Blog — Skills documentation (2026)
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