Use it to fetch the Swift book, generate the programming-swift skill directory, create its ZIP archive, detect the Swift version, or run a dry build with a chosen output folder.

It avoids manually collecting, organizing, versioning, and archiving the Swift documentation.

How kylehughes/the-unofficial-swift-programming-language-skill configu

Q: What is the-unofficial-swift-programming-language-skill CLAUDE.md?

A package builder that turns Apple's official Swift programming book into a skill package for Claude Code and a plugin marketplace.

Reuse

Borrowing it

Nothing to install: this file belongs to kylehughes/the-unofficial-swift-programming-language-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/kylehughes/the-unofficial-swift-programming-language-skill/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/kylehughes/the-unofficial-swift-programming-language-skill

Made for: Claude Code.

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/instructions/kylehughes/the-unofficial-swift-programming-language-skill/claude-md/github.svg)](https://agentmods.dev/instructions/kylehughes/the-unofficial-swift-programming-language-skill/claude-md)

Your own site

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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/instructions/kylehughes/the-unofficial-swift-programming-language-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/kylehughes/the-unofficial-swift-programming-language-skill/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,017 This file is loaded in full into every session.

When invoked 1,017 The same file — it is already loaded in full.

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	$0.01017	$0.01017
Opus 5	$0.00508	$0.00508
Sonnet 5	$0.00203	$0.00203
Haiku 4.5	$0.00102	$0.00102

Measured 11d ago against content hash 3632398f4566, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

the-unofficial-swift-programming-language-skill CLAUDE.md 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 11d ago.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

the-unofficial-swift-programming-language-skill CLAUDE.md — 100% identical, 0 lines differ

CLAUDE.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to programming agents, like Claude Code (claude.ai/code), when working with code in this repository.

Repository Purpose

This repository packages The Swift Programming Language book from Apple into a Claude Skill format. The skill is automatically generated from the official Swift documentation repository. This repository is exposed as a Claude plugin marketplace which vends a plugin which contains the skill.

Build Commands

Generate the Skill Package

python3 package.py

This command:

Clones the official Swift book repository (https://github.com/swiftlang/swift-book.git)
Extracts and organizes the documentation content
Generates the programming-swift directory with the skill content
Creates programming-swift.zip archive for distribution
Extracts the Swift version automatically from the documentation

Build Options

--output DIR or -o DIR: Specify custom output directory (default: ./programming-swift)
--keep-temp: Keep the temporary git clone after packaging
--dry-run: Simulate operations without writing files

Code Architecture

Design Philosophy: Separation of Concerns

The repository manages two distinct responsibilities which are intentionally decoupled:

Skill Generation (package.py):
- Goal: To be a standalone, portable tool that transforms the Swift documentation into a canonical Claude Skill format.
- Constraint: It must have zero dependencies and be runnable by anyone, anywhere, to generate the skill.
- Scope: It strictly handles content extraction and generation. It generally does not know about the release process, versioning schemes, or marketplace metadata.
Distribution & Lifecycle (Repository & Workflow):
- Goal: To vend the generated skill via releases and the Claude Marketplace.
- Scope: This layer (handled by .github/workflows/release.yml) manages the "outer loop": running the generator, detecting changes, managing marketplace.json, and creating Git tags/releases.

Read the full file on GitHub · 94 lines

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.

11d ago First seen · 94 lines · 1,017 tokens per session scan A 3632398f4566

Subscribe to this mod's changes

the-unofficial-swift-programming-language-skill CLAUDE.md is an instructions file published in the GitHub repository kylehughes/the-unofficial-swift-programming-language-skill (46 stars, last pushed 9d ago), licensed MIT. It adds 1,017 tokens to every session, about $0.0051 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 2026-08-30.

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