What is Swift-Wasm-Agent-Skill AGENTS.md?

Authoring instructions for SwiftWasm skills, which help Swift developers build software that runs as WebAssembly in a web environment.

Writing skills about SwiftWasm setup, JavaScriptKit or BridgeJS usage, porting code, compatibility limits, troubleshooting, and build configuration.

They keep each skill focused and require concrete, accurate guidance about differences between native Swift and Swift running as WebAssembly.

How swiftwasm/Swift-Wasm-Agent-Skill configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to swiftwasm/Swift-Wasm-Agent-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/swiftwasm/Swift-Wasm-Agent-Skill/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/swiftwasm/Swift-Wasm-Agent-Skill

Made for: Codex, OpenCode.

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/swiftwasm/swift-wasm-agent-skill/agents-md/github.svg)](https://agentmods.dev/instructions/swiftwasm/swift-wasm-agent-skill/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/swiftwasm/swift-wasm-agent-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/swiftwasm/swift-wasm-agent-skill/agents-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/swiftwasm/swift-wasm-agent-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/swiftwasm/swift-wasm-agent-skill/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 531 This file is loaded in full into every session.

When invoked 531 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	$0.00531	$0.00531
Opus 5.5	$0.00212	$0.00212
Sonnet 5.5	$0.00106	$0.00106
Haiku 4.5	$0.00053	$0.00053

Measured 2mo ago against content hash cbc74c425e77, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Swift-Wasm-Agent-Skill AGENTS.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 2mo 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.

AGENTS.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SwiftWasm Skills Authoring Guide

Core Principles

Provide accurate, actionable guidance for Swift developers targeting WebAssembly.
Keep instructions specific to the SwiftWasm toolchain and its ecosystem libraries.
Prefer concrete code examples over abstract descriptions.
Document platform differences between native Swift and Swift on Wasm explicitly.
Keep each skill focused on its specific domain (JavaScriptKit, BridgeJS, or porting).

Content Guidelines

Keep SKILL.md procedural and concise — it is the entry point agents read first.
Put detailed API references, patterns, and examples in references/.
Put helper scripts in scripts/ within the skill folder.
Organize content by the tasks an agent performs: setup, coding patterns, troubleshooting.
Use concrete examples that compile and run under the SwiftWasm toolchain.

What To Include

Project setup and toolchain installation steps.
API usage patterns with paired Swift and JavaScript examples where applicable.
Known limitations and workarounds for Swift on Wasm.
Compatibility tables for frameworks and APIs.
Environment diagnostic scripts and build configuration guidance.

What To Exclude

General Swift language tutorials unrelated to Wasm specifics.
Native-only frameworks that have no Wasm path (unless documenting incompatibility in the porting skill).
Speculative or unverified toolchain behavior.
Duplicate content across skill folders — link instead.

Skill Structure

Each skill directory at the repo root follows this layout:

<skill-name>/
  SKILL.md              # Primary skill document agents read
  references/           # Detailed reference material
  scripts/              # Helper scripts (optional)

Paths in SKILL.md are relative to the skill folder. For example, the JavaScriptKit scripts/doctor.py is referenced as scripts/doctor.py within its SKILL.md.

Language And Tone

Use direct, technical language.
Use imperative instructions for actionable steps.
Prefer short paragraphs and bullet lists over prose.
Keep examples compact and realistic.

Read the full file on GitHub · 57 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.

2mo ago First seen · 57 lines · 531 tokens per session scan A cbc74c425e77

Subscribe to this mod's changes

Swift-Wasm-Agent-Skill AGENTS.md is an instructions file published in the GitHub repository swiftwasm/Swift-Wasm-Agent-Skill (49 stars, last pushed 2mo ago), licensed MIT. It adds 531 tokens to every session, about $0.0021 per session on Opus 5.5. 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.

Kotlin and Swift Languages

Swift-Wasm-Agent-Skill AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Swift-Wasm-Agent-Skill AGENTS.mdswiftwasm/Swift-Wasm-Agent-Skill	Instructions file	49	2mo ago	MIT	A	531	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

Swift-Wasm-Agent-Skill: Instructions file for Codex