What is host-pattern?

A guide for adding a website or service host to Nuclear's plugin system. A host is the part of the player that exposes playback functions for plugins to use.

Use it when implementing a new host or adding a domain to Nuclear’s plugin system.

It explains the project’s required interfaces, file structure, player changes, and error-handling conventions, so new hosts fit the existing system.

How nukeop/nuclear configures Claude Code and Codex

About the project

Nuclear is a free, open-source desktop music player that searches for and streams music from available sources without ads or tracking. It is for listeners on Windows, macOS, or Linux who want search, playlists, artist and album browsing, themes, and plugin-based extensions.

nukeop/nuclear · 18,876 stars · on GitHub · nuclearplayer.com

Reuse

Borrowing it

Nothing to install: this file belongs to nukeop/nuclear. 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/nukeop/nuclear/master/.agents/skills/host-pattern/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/nukeop/nuclear

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/nukeop/nuclear/host-pattern/github.svg)](https://agentmods.dev/skills/nukeop/nuclear/host-pattern)

Your own site

<a href="https://agentmods.dev/skills/nukeop/nuclear/host-pattern"><img src="https://agentmods.dev/badge/skills/nukeop/nuclear/host-pattern/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/nukeop/nuclear/host-pattern"><img src="https://agentmods.dev/badge/skills/nukeop/nuclear/host-pattern.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,220 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin unknown 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	$0.00086	$0.01220
Opus 5.5	$0.00034	$0.00488
Sonnet 5.5	$0.00017	$0.00244
Haiku 4.5	$0.00009	$0.00122

Measured 2mo ago against content hash a3ada30c5bb5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

host-pattern scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

async fetch(query, providerId?) {

.agents/skills/host-pattern/SKILL.md · 149 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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 · 149 lines · 86 tokens per session scan A a3ada30c5bb5

Subscribe to this mod's changes

host-pattern is a skill published in the GitHub repository nukeop/nuclear (18,876 stars, last pushed today), licensed AGPL-3.0. It adds 86 tokens to every session and 1,220 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents linux mac music music-player streaming windows

host-pattern next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
host-patternnukeop/nuclear	Skill	19k	today	AGPL-3.0	A	86	Claude Code, Codex
musicboxdarknessomi/musicbox	Skill	9.9k	5d ago	MIT	A	65	Claude Code, Codex
test-uibrowseros-ai/BrowserOS	Skill	14k	yesterday	AGPL-3.0	A	59	Claude Code
browseros-neobrowseros-ai/BrowserOS	Skill	14k	yesterday	AGPL-3.0	A	119	Claude Code, Codex
browseros-neobrowseros-ai/BrowserOS	Skill	14k	yesterday	AGPL-3.0	A	119	Claude Code, Codex
ai-sdkbrowseros-ai/BrowserOS	Skill	14k	yesterday	AGPL-3.0	A	155	Claude Code, Codex
electron-expertpersonamanagmentlayer/pcl	Skill	44	11d ago	Apache-2.0	A	59	Claude Code

nuclear: Skill for Claude Code

Borrowing it

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Makes network callslowCapability

The source is not reproduced here

Licensed AGPL-3.0

What this file has done since we first saw it

host-pattern compared with skills from other repositories