Agent-Skills.md

Agent Skills: WXT Browser Extensions

WXT browser extension patterns for entrypoints, background service workers, content scripts, side panels, storage, permissions, host permissions, browser compatibility, and build commands. Use when editing apps/tab-manager, wxt.config.ts, src/entrypoints, extension manifests, or @wxt-dev/storage usage.

UncategorizedID: EpicenterHQ/epicenter/wxt

Repository

EpicenterHQ/epicenter
EpicenterHQLicense: NOASSERTION
4,678359

Install this agent skill to your local

pnpm dlx add-skill https://github.com/EpicenterHQ/epicenter/tree/HEAD/.agents/skills/wxt

Skill Files

Browse the full folder contents for wxt.

Download Skill

Loading file tree…

.agents/skills/wxt/SKILL.md

Skill Metadata

Name
wxt
Description
WXT browser extension patterns for entrypoints, background service workers, content scripts, side panels, storage, permissions, host permissions, browser compatibility, and build commands. Use when editing apps/tab-manager, wxt.config.ts, src/entrypoints, extension manifests, or @wxt-dev/storage usage.

WXT Browser Extensions

Reference Repositories

  • WXT - Browser extension framework used by apps/tab-manager

Upstream Grounding

When WXT entrypoint discovery, manifest generation, browser targets, storage, content scripts, background service worker lifecycle, or build output affects correctness, ask DeepWiki a narrow question against wxt-dev/wxt. Verify decisive details against local wxt.config.ts and generated output.

Epicenter Shape

apps/tab-manager is side-panel first: no popup and no content scripts today. The background service worker is minimal and opens the side panel from the extension action.

Entrypoints

  • Entrypoints live under src/entrypoints, zero or one level deep.
  • Use defineBackground for background service workers and defineContentScript for content scripts.
  • Put browser API runtime work inside the entrypoint main function because WXT imports entrypoint modules during build in Node.
  • Do not make background main async. Kick off async setup inside it.
  • Use browser flags and feature detection for cross-browser APIs, not types alone.

Manifest, Storage, And Commands

  • Declare permissions and host_permissions explicitly in wxt.config.ts.
  • Use @wxt-dev/storage with area-prefixed keys and include the storage permission.
  • Keep host permissions as narrow as the feature allows. Use <all_urls> only when the extension genuinely needs all tab URLs or favicons.
  • Local scripts are WXT commands: wxt prepare, wxt build, wxt zip, and browser flags such as -b firefox.
  • From the repo root, prefer the existing Bun scripts for the Tab Manager app instead of calling package-manager alternatives.