agent-plugins

Design how Chromium extensions interact with page DOM and coordinate between content scripts, service workers, and extension pages. Use when deciding how to inject code, pass messages, structure isolated-world logic, or debug cross-context state flow.

Prepare Chromium extensions for packaging, Chrome Web Store submission, Microsoft Edge Add-ons submission, and controlled release management. Use when assembling a release build, writing listing metadata, validating review readiness, or planning update rollout.

Review Chromium extensions for least-privilege permissions, safe host access, CSP and remote-code compliance, and narrow resource exposure. Use when adding permissions, auditing a manifest, preparing a store review narrative, or tightening extension security boundaries.

Debug Chromium browser extensions across service workers, content scripts, and extension pages, and write reproducible Playwright-based tests. Use when loading unpacked extensions, inspecting runtime contexts, building smoke tests, or diagnosing permission, lifecycle, and messaging issues.

Choose and implement the right Chromium extension UI surfaces such as popup, side panel, options page, commands, context menus, and offscreen documents. Use when deciding how the user should enter a workflow, where state should live, or how much UI should persist across tabs.

Plan Manifest V3 Chromium extensions around the right execution contexts, permissions, storage, and background model. Use when designing a new extension, migrating older background-page code, choosing between service workers and content scripts, or reviewing an extension manifest and folder layout.