Borrowing it
Nothing to install: this file belongs to Shada01245/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.
curl -O https://raw.githubusercontent.com/Shada01245/the-unofficial-swift-programming-language-skill/main/CLAUDE.mdgit clone --depth 1 https://github.com/Shada01245/the-unofficial-swift-programming-language-skillWrote 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.
[](https://agentmods.dev/instructions/shada01245/the-unofficial-swift-programming-language-skill/claude-md)<a href="https://agentmods.dev/instructions/shada01245/the-unofficial-swift-programming-language-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/shada01245/the-unofficial-swift-programming-language-skill/claude-md/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.
<a href="https://agentmods.dev/instructions/shada01245/the-unofficial-swift-programming-language-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/shada01245/the-unofficial-swift-programming-language-skill/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 |
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 10d 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.
This is a copy
100% identical to the-unofficial-swift-programming-language-skill CLAUDE.md — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
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-swiftdirectory with the skill content - Creates
programming-swift.ziparchive for distribution - Extracts the Swift version automatically from the documentation
Build Options
--output DIRor-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, managingmarketplace.json, and creating Git tags/releases.
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.
- 10d ago First seen · 94 lines · 1,017 tokens per session scan A 3632398f4566
the-unofficial-swift-programming-language-skill CLAUDE.md is an instructions file published in the GitHub repository Shada01245/the-unofficial-swift-programming-language-skill (2 stars, last pushed today), 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. It is 100% identical to the-unofficial-swift-programming-language-skill CLAUDE.md, differing in 0 lines, and is treated as a copy.
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