How do I install the Addon skill?

Run npx skillmds@latest add bytesagain/addon in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Addon safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: executes scripts. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Addon?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Addon free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

bytesagain (@bytesagain) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Addon by bytesagain — Agent Skill

Name: Addon
Rating: 4.5 (4 reviews)
Author: bytesagain

Addon

Browser and software addon architecture reference — extension APIs, manifest formats, lifecycle hooks, and plugin security models. Use when building browser extensions, designing plugin systems, or understanding addon sandboxing.

bytesagain Updated Sep 9, 2026 12 repo stars

File contents

Addon — Addon & Extension Architecture Reference

Quick-reference skill for browser extension development, plugin system design, and addon security.

When to Use

Building browser extensions (Chrome, Firefox, Safari)
Designing plugin/addon architectures for applications
Understanding extension manifest formats and permissions
Implementing addon lifecycle hooks and event systems
Reviewing addon security models and sandboxing

Commands

`intro`

scripts/script.sh intro

Overview of addon/extension architecture — types, platforms, and design patterns.

`manifest`

scripts/script.sh manifest

Extension manifest formats — Manifest V3, permissions, content scripts.

`lifecycle`

scripts/script.sh lifecycle

Addon lifecycle — install, activate, update, disable, uninstall hooks.

`apis`

scripts/script.sh apis

Browser extension APIs — tabs, storage, messaging, alarms, notifications.

`security`

scripts/script.sh security

Addon security — sandboxing, CSP, permission models, code review.

`patterns`

scripts/script.sh patterns

Plugin architecture patterns — hook systems, middleware, event buses.

`messaging`

scripts/script.sh messaging

Inter-component messaging — background ↔ content script ↔ popup communication.

`publishing`

scripts/script.sh publishing

Publishing addons — Chrome Web Store, AMO, review process, updates.

`help`

scripts/script.sh help

`version`

scripts/script.sh version

Configuration

Variable	Description
`ADDON_DIR`	Data directory (default: ~/.addon/)

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---name: addondescription: Browser and software addon architecture reference — extension APIs, manifest formats, lifecycle hooks, and plugin security models. Use when building browser extensions, designing plugin systems, or understanding addon sandboxing.--- # Addon — Addon & Extension Architecture Reference Quick-reference skill for browser extension development, plugin system design, and addon security. ## When to Use - Building browser extensions (Chrome, Firefox, Safari) - Designing plugin/addon architectures for applications - Understanding extension manifest formats and permissions - Implementing addon lifecycle hooks and event systems - Reviewing addon security models and sandboxing ## Commands ### `intro` ```bash scripts/script.sh intro ``` Overview of addon/extension architecture — types, platforms, and design patterns. ### `manifest` ```bash scripts/script.sh manifest ``` Extension manifest formats — Manifest V3, permissions, content scripts. ### `lifecycle` ```bash scripts/script.sh lifecycle ``` Addon lifecycle — install, activate, update, disable, uninstall hooks. ### `apis` ```bash scripts/script.sh apis ``` Browser extension APIs — tabs, storage, messaging, alarms, notifications. ### `security` ```bash scripts/script.sh security ``` Addon security — sandboxing, CSP, permission models, code review. ### `patterns` ```bash scripts/script.sh patterns ``` Plugin architecture patterns — hook systems, middleware, event buses. ### `messaging` ```bash scripts/script.sh messaging ``` Inter-component messaging — background ↔ content script ↔ popup communication. ### `publishing` ```bash scripts/script.sh publishing ``` Publishing addons — Chrome Web Store, AMO, review process, updates. ### `help` ```bash scripts/script.sh help ``` ### `version` ```bash scripts/script.sh version ``` ## Configuration | Variable | Description | |----------|-------------| | `ADDON_DIR` | Data directory (default: ~/.addon/) | --- *Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*

Frequently asked questions

Addon

File contents

Addon — Addon & Extension Architecture Reference

When to Use

Commands

intro

manifest

lifecycle

apis

security

patterns

messaging

publishing

help

version