Individual skill
chrome-extension
Chrome Extensions (Manifest V3) performance and code quality guidelines. Use when writing, reviewing, or refactoring Chrome extension code including service workers, content scripts, message passing, storage APIs, TypeScript patterns, and testing.
skills/.experimental/chrome-extension/SKILL.md
Source commit cf93c57cac89d6fc3e4194686000411567f5caf3
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- Yes
- Observed behavior
- Not checked yet
- Last checked
- Nov 5, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 223
- Repository last updated
- Aug 15, 2026
- License
- MIT
Observed agent integration: codex
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Browse files
AGENTS.mddoc · 9,851 bytesREADME.mddoc · 4,479 bytesSKILL.mdcore · 10,313 bytesassets/templates/_template.mddoc · 1,301 bytesmetadata.jsonasset · 1,415 bytesreferences/_sections.mddoc · 2,050 bytesreferences/api-avoid-redundant-api-calls.mddoc · 2,084 bytesreferences/api-handle-context-invalidated.mddoc · 2,469 bytesreferences/api-query-tabs-efficiently.mddoc · 1,940 bytesreferences/api-use-alarms-minperiod.mddoc · 2,069 bytesreferences/api-use-declarative-content.mddoc · 2,139 bytesreferences/api-use-promises-over-callbacks.mddoc · 2,095 bytesreferences/comp-adapter-interface.mddoc · 2,758 bytesreferences/comp-content-script-structure.mddoc · 2,946 bytesreferences/comp-css-class-patterns.mddoc · 2,300 bytesreferences/comp-manager-class.mddoc · 2,439 bytesreferences/comp-type-guards.mddoc · 3,679 bytesreferences/comp-ui-components.mddoc · 3,104 bytesreferences/content-batch-dom-operations.mddoc · 2,312 bytesreferences/content-minimize-script-size.mddoc · 1,831 bytesreferences/content-programmatic-injection.mddoc · 2,098 bytesreferences/content-use-document-idle.mddoc · 1,800 bytesreferences/content-use-mutation-observer.mddoc · 2,490 bytesreferences/content-use-specific-matches.mddoc · 1,640 bytesreferences/err-context-invalidation.mddoc · 3,728 bytesreferences/err-early-return.mddoc · 2,988 bytesreferences/err-null-coalescing.mddoc · 2,778 bytesreferences/err-promise-barrier.mddoc · 3,616 bytesreferences/err-storage-operations.mddoc · 3,070 bytesreferences/err-url-parsing.mddoc · 3,135 bytesreferences/err-validation-pattern.mddoc · 4,003 bytesreferences/mem-avoid-closure-leaks.mddoc · 2,152 bytesreferences/mem-avoid-detached-dom.mddoc · 2,050 bytesreferences/mem-cleanup-event-listeners.mddoc · 2,507 bytesreferences/mem-clear-intervals-timeouts.mddoc · 2,168 bytesreferences/mem-use-weak-collections.mddoc · 2,107 bytesreferences/msg-avoid-broadcast-to-all-tabs.mddoc · 2,206 bytesreferences/msg-check-lasterror.mddoc · 2,234 bytesreferences/msg-debounce-frequent-events.mddoc · 2,051 bytesreferences/msg-minimize-payload-size.mddoc · 2,181 bytesreferences/msg-use-ports-for-frequent.mddoc · 1,920 bytesreferences/net-limit-csp-modifications.mddoc · 2,031 bytesreferences/net-request-minimal-permissions.mddoc · 1,833 bytesreferences/net-use-activetab.mddoc · 2,051 bytesreferences/net-use-declarativenetrequest.mddoc · 2,233 bytesreferences/storage-avoid-storing-large-blobs.mddoc · 2,342 bytesreferences/storage-batch-operations.mddoc · 2,227 bytesreferences/storage-cache-frequently-accessed.mddoc · 2,245 bytesreferences/storage-choose-correct-type.mddoc · 2,016 bytesreferences/storage-use-session-for-temp.mddoc · 1,919 bytesreferences/style-boolean-naming.mddoc · 1,642 bytesreferences/style-cache-naming.mddoc · 1,578 bytesreferences/style-constants.mddoc · 1,641 bytesreferences/style-directory-structure.mddoc · 1,709 bytesreferences/style-file-naming.mddoc · 1,065 bytesreferences/style-function-naming.mddoc · 1,614 bytesreferences/style-import-type.mddoc · 2,588 bytesreferences/style-index-entry-points.mddoc · 1,488 bytesreferences/style-message-enums.mddoc · 2,170 bytesreferences/style-type-naming.mddoc · 1,701 bytesreferences/sw-avoid-keepalive.mddoc · 1,879 bytesreferences/sw-persist-state-storage.mddoc · 1,910 bytesreferences/sw-register-listeners-toplevel.mddoc · 2,170 bytesreferences/sw-return-true-async.mddoc · 2,169 bytesreferences/sw-use-alarms-api.mddoc · 1,748 bytesreferences/sw-use-offscreen-for-dom.mddoc · 2,236 bytesreferences/test-browser-api-mocking.mddoc · 5,960 bytesreferences/test-organization.mddoc · 3,977 bytesreferences/test-validation-functions.mddoc · 6,236 bytesreferences/ui-batch-badge-updates.mddoc · 2,391 bytesreferences/ui-minimize-popup-bundle.mddoc · 2,321 bytesreferences/ui-render-with-cached-data.mddoc · 2,390 bytesreferences/ui-use-options-page-lazy.mddoc · 2,470 bytes
Read excerpt
# Chrome Extension Best Practices
Comprehensive performance and code quality guide for Chrome Extensions (Manifest V3). Contains 67 rules across 12 categories, prioritized by impact to guide automated refactoring and code generation.
## When to Apply
Reference these guidelines when:
- Writing new Chrome extension code
- Migrating from Manifest V2 to Manifest V3
- Optimizing service worker lifecycle and state management
- Implementing content scripts for page interaction
- Debugging performance issues in extensions
## Rule Categories by Priority