Fullstack App Builder

Q: What is a Claude Code skill and how does the Fullstack App Builder skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Fullstack App Builder is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: databases · Last updated: 2026-10-25

cloud:cloudflare type:generator

skanehira/fullstack-worker-template (React 19 + Hono + Cloudflare D1/Drizzle + Cognito 認証) から本格的なフルスタック Web アプリの scaffold とローカル環境構築を行い、docs/PRODUCT_SPEC.md を生成して設計ループ (/dev-spec) → 実装ループ (/dev-impl) へ引き渡すワークフロー。プロジェクト作成前に Stripe 決済と Cognito 認証の要否をヒアリングし、不要な方をテンプレートから削除する。機能の設計・実装はこのスキルでは行わない。「フルスタックアプリを作りたい」「DB 付き Web アプリを新規で立ち上げたい」「fullstack-worker-template から始めたい」「D1 と Hono で API 付きのサイトを作りたい」「Cognito でログインできるアプリを作りたい」「Stripe 決済付きの Web サービスを立ち上げたい」「バックエンド付きのプロジェクトを scaffold して」などで起動。フロントだけで完結する静的デモ (localStorage で足りるもの) は demo-site-builder を使う。

Security AStatic scan found no risk patternsHow grading works ›

What this skill does

Fullstack App Builder is a community-contributed Claude Code skill in the databases sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/fullstack-app-builder/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Fullstack App Builder Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/fullstack-app-builder
curl -L https://claudskills.com/skills/fullstack-app-builder/SKILL.md \
  -o ~/.claude/skills/fullstack-app-builder/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/fullstack-app-builder/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/fullstack-app-builder/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\fullstack-app-builder\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Fullstack App Builder Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/fullstack-app-builder/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Fullstack App Builder skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Fullstack App Builder skill?

Use Fullstack App Builder when your Claude Code task falls under the Engineering category — specifically in the databases area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Fullstack App Builder" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Fullstack App Builder skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Fullstack App Builder is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/skanehira/dotfiles/blob/531455f6bfd4636cc9e28f53be2cd7f6e264aae8/agents/skills/fullstack-app-builder/SKILL.md
License: MIT
Author: skanehira

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

skanehira. (2026). Fullstack App Builder [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/fullstack-app-builder/

BibTeX

@misc{fullstack-app-builder-2026,
  author    = {skanehira},
  title     = {Fullstack App Builder [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/fullstack-app-builder/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/fullstack-app-builder.svg)](https://claudskills.com/skills/fullstack-app-builder/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

Security scan

Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/fullstack-app-builder/#security)

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Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Engineering skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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