An Apple app-building workflow that turns an app idea into a Swift project for Xcode, Apple's app development tool. It uses Apple technology references and can create editable app icon layers.

Use it to create or extend native iPhone and iPad apps, implement user flows, and prepare projects for testing and building in Xcode.

It gives a coding agent a defined process for turning a brief into screens, data, and acceptance checks instead of leaving those decisions unclear. It also points the agent to relevant Apple documentation and release information.

ios-builder — Skill for Claude Code and Codex by Nagarjuna2997

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add Nagarjuna2997/ios-agent-skill --skill ios-builder

Clone the repo

git clone --depth 1 https://github.com/Nagarjuna2997/ios-agent-skill

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/nagarjuna2997/ios-agent-skill/ios-builder/github.svg)](https://agentmods.dev/skills/nagarjuna2997/ios-agent-skill/ios-builder)

Your own site

<a href="https://agentmods.dev/skills/nagarjuna2997/ios-agent-skill/ios-builder"><img src="https://agentmods.dev/badge/skills/nagarjuna2997/ios-agent-skill/ios-builder/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/nagarjuna2997/ios-agent-skill/ios-builder"><img src="https://agentmods.dev/badge/skills/nagarjuna2997/ios-agent-skill/ios-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 623 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00053	$0.00623
Opus 5	$0.00026	$0.00311
Sonnet 5	$0.00011	$0.00125
Haiku 4.5	$0.00005	$0.00062

Measured yesterday against content hash 34c2f7ca5733, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

ios-builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/ios-agent-chatgpt/skills/ios-builder/SKILL.md · 21 lines

What it actually says

Build an Apple App

Turn the user's idea into a working, tested implementation in their available coding environment. Start with the existing project when present; otherwise use a new directory. Make routine design choices and record assumptions. Ask only for missing information that materially blocks the app, such as required service credentials.

Read docs/tooling/app-description-workflow.md and define the user flows, screens, data, and acceptance criteria from the brief.
Read docs/tooling/offline-source-library.md and search local source first. With terminal access use node scripts/query-library.mjs search "feature"; read only needed sections or complete source files. Find frameworks in docs/apple/all-technologies.md. Load only relevant guides. Consult docs/apple/updates-and-release-notes.md for SDK changes and use source dates honestly.
With terminal access, scaffold via npx -y @nagarjuna2002/[email protected] new AppName --brief "the app idea" --xcodegen. Use a validated Swift identifier for AppName and pass user text as an argument rather than interpolating it into shell syntax. Read the generated App/APP_BRIEF.md and implement it; the scaffolder itself does not generate the finished product from natural language.
Implement features using the existing app architecture. Use templates/ and patterns/ only where appropriate. Add real loading, empty, error and populated states; provide preview data and keep live service dependencies injectable.
Read docs/design/icon-composer.md. Create and customize separate SVG/PNG foreground layers plus a background decision. Use Icon Composer to annotate and verify the native document when available. Never claim a flattened image or renamed JSON is a native layered icon.
Generate the project with XcodeGen when using that scaffold, build with the actual Xcode SDK, run meaningful tests, then inspect app screens and accessible interactions. Fix failures before reporting completion.
Report files changed, runnable commands, test/build evidence, and anything needing credentials, hardware or user decisions. Do not publish an app or create paid service resources without the user's authorization.

If the environment lacks filesystem or Xcode access, deliver the concrete plan/source artifacts it can support and explain what must run in a local coding environment. A plugin installation is not evidence that an app has been built. These bundled references are a dated snapshot; consult linked official sources for changing APIs.

For optional local Simulator control and a browser/sidebar preview, read docs/tooling/ios-simulator-mcp.md. Inspect installed device profiles before claiming support for a newly announced phone; current Duo guidance is in docs/platforms/iphone-duo.md. Runtime control requires a local Mac with Xcode.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 21 lines · 53 tokens per session scan A 34c2f7ca5733

Subscribe to this mod's changes

ios-builder is a skill published in the GitHub repository Nagarjuna2997/ios-agent-skill (33 stars, last pushed today), licensed MIT. It adds 53 tokens to every session and 623 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-11.

Claude Code Kotlin and Swift Languages Mobile codex cursor github-copilot ios swift

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