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External App Create

Category: Engineering  ·  Sub-category: databases  ·  Last updated:
type:generatortype:integration
Scaffold a new Cozystack external app package inside an external-apps repository. Generates the full chart skeleton (Chart.yaml, Makefile, values.yaml with cozyvalues-gen annotations, templates), registers it in core/platform (namespace, HelmRepository, HelmChart, HelmRelease, ApplicationDefinition), and wires dependency integration — supports managed CNPG Postgres clusters provisioned in-chart and external secret references for pre-existing services. Use when adding a new application (e.g. Immich, Gitea, Nextcloud) to an external-apps repo that follows the cozystack/external-apps-example layout.
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From the source SKILL.md

This skill scaffolds a new Cozystack external app package. It creates all files needed for the app to appear in the Cozystack dashboard and be deployable via the GitOps pipeline (GitRepository → Flux HelmRelease → ApplicationDefinition).

What this skill does

External App Create 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/external-app-create/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when adding a new application (e.g.

Who uses this skill

The External App Create 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 175,000+ 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/external-app-create
curl -L https://claudskills.com/skills/external-app-create/SKILL.md \
  -o ~/.claude/skills/external-app-create/SKILL.md

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

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

Telegram

📱 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 External App Create Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/external-app-create/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the External App Create skill do?
Scaffold a new Cozystack external app package inside an external-apps repository. Generates the full chart skeleton (Chart.yaml, Makefile, values.yaml with cozyvalues-gen annotations, templates), registers it in core/platform (namespace, HelmRepository, HelmChart, HelmRelease, ApplicationDefinition), and wires dependency integration — supports managed CNPG Postgres clusters provisioned in-chart and external secret references for pre-existing services. Use when adding a new application (e.g. Immich, Gitea, Nextcloud) to an external-apps repo that follows the cozystack/external-apps-example layout.
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 External App Create skill?
Use External App Create 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 External App Create" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the External App Create 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. External App Create 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

Cite this skill

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

APA
cozystack. (2026). External App Create [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/external-app-create/
BibTeX
@misc{external-app-create-2026,
  author    = {cozystack},
  title     = {External App Create [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/external-app-create/}
}

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Security scan

Grade A · scanned 2026-08-03 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 2 of 10 categories (filesystem, obfuscation), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

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