App Builder SDK

App Builder SDK is an AI Engineering skill for Claude Code, published by holaboss-ai in holaOS.

7.4K stars641 forkson holaboss-ai/holaOSAdded 2026/08/15+21% in starsRepository updated 2026/08/15

agentagent-harnessagent-osagenticaiai-agentai-agentsartificial-intelligenceclaude-codecodexelectronholabossholaosllmmcpmemorymodel-context-protocolruntimetypescriptworkspace

Install in seconds

Install App Builder SDK

Copy App Builder SDK into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/holaboss-ai/holaOS/tree/main/runtime/harnesses/src/embedded-skills/app-builder-sdk ~/.claude/skills/app-builder-sdk

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/holaboss-ai/holaOS.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: runtime/harnesses/src/embedded-skills/app-builder-sdk/SKILL.md in holaboss-ai/holaOS
Installs to: ~/.claude/skills/app-builder-sdk
Collection: One of 25 skills cataloged from this repository
Category: AI Engineering — 2451 skills

What App Builder SDK does

App Builder SDK builds new holaOS apps using five backend primitives (connection, resource, action, sync, start) and optionally adds a shadcn dashboard UI. Use it when a user requests an integration-only module like Slack or Discord, or a dashboard app with a workspace pane.

App Builder SDK is cataloged under AI Engineering on DirSkills. App Builder SDK comes from a repository tagged agent, agent-harness, agent-os, agentic and ai.

Documentation

README

Excerpt

App Builder (SDK)

Use this skill whenever the user wants a new holaOS app. Two shapes both ship through the same SDK; pick the one the request needs:

Integration-only module — Slack, Discord, Notion, Stripe, Linear, anything whose value is "talk to one external service via MCP tools, agent drives, no per-app dashboard". The SDK's default web stub is fine; no src/client/ directory.
Dashboard app — vibe-coded content planners, CRMs, kanban-style trackers, podcast-guest managers, anything where the user expects a workspace pane they can look at and click around in. Has a real shadcn UI authored under src/client/ (TanStack Start). The MCP tools are still there — they're how the agent drives the same data the dashboard surfaces.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about App Builder SDK

What else does holaboss-ai publish alongside App Builder SDK?
App Builder SDK is one of 25 skills that DirSkills catalogs from holaboss-ai/holaOS, the repository it ships in. Its siblings there include Audience Analyst, Browser Core Efficient and Browser QA. Each one is a separate skill with its own page in this directory, installs the same way App Builder SDK does, and is maintained by holaboss-ai in that same repository. The rest of the collection is listed on the holaboss-ai/holaOS page.
How does App Builder SDK compare to other AI Engineering skills?
App Builder SDK ranks #424 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of App Builder SDK against them. Open each page to compare what they document and how they install.