javascript skills

react/react

Skill Claude CodeCodex

Use when feature flag tests fail, flags need updating, understanding @gate pragmas, debugging channel-specific test failures, or adding new flags to React.

react/react

Skill Claude CodeCodex

Orchestrate the Rust compiler port end-to-end. Discovers the current frontier, fixes failing passes, ports new passes, reviews, and commits in a loop.

react/react

Skill Claude CodeCodex

Use when you need to update a plan document with deep research across all compiler passes. Launches parallel subagents to analyze how a topic affects every compiler phase, then consolidates findings into the plan doc.

electron/electron

Skill Claude CodeCodex

End-to-end Chrome security backport for an Electron release branch. Given a Chrome Releases blog URL and a branch (e.g. 41-x-y), determines which CVE fixes are missing from the actual synced source, writes the cherry-pick patches locally, validates them with e sync --3 + lint --patches, then pushes a single PR. Use…

electron/electron

Skill Claude CodeCodex

Guide for performing Chromium version upgrades in the Electron project. Use when working on the roller/chromium/main branch to fix patch conflicts during e sync --3. Covers the patch application workflow, conflict resolution, analyzing upstream Chromium changes, and proper commit formatting for patch fixes.

electron/electron

Skill Claude CodeCodex

Guide for performing Node.js version upgrades in the Electron project. Use when working on the roller/node/main branch to fix patch conflicts during e sync --3. Covers the patch application workflow, conflict resolution, analyzing upstream Node.js changes, building, running the Node.js test suite, and proper commit…

denoland/deno

Skill Claude CodeCodex

Lint all code (Rust + JS/TS). Use before opening a PR when Rust code was changed.

denoland/deno

Skill Claude CodeCodex

Run a Node.js compatibility test, diagnose failures, and either fix the implementation, skip, or ignore the test. Use when asked to work on node compat tests.

denoland/deno

Skill Claude CodeCodex

Review a Deno runtime pull request for correctness, tests, security, and conventions. Use when asked to review a PR or when a PR number/URL is provided for review.

angular/angular

Skill Claude CodeCodex

Comprehensive writing guide for Angular documentation (adev). Covers Google Technical Writing standards, Angular-specific markdown extensions, code blocks, and components. You MUST use this skill any time you plan to create, edit, or review documentation files in adev/ or adev/src/content.

angular/angular

Skill Claude CodeCodex

Guidelines and tools for reviewing pull requests in the Angular repository.

angular/angular

Skill Claude CodeCodex

Explains the mental model and architecture of the code under packages/forms/signals. You MUST use this skill any time you plan to work with code in packages/forms/signals.

oven-sh/bun

Skill Claude CodeCodex

Implements JavaScript classes in C++ using JavaScriptCore. Use when creating new JS classes with C++ bindings, prototypes, or constructors.

oven-sh/bun

Skill Claude CodeCodex

Creates JavaScript classes using Bun's Rust bindings generator (.classes.ts). Use when implementing new JS APIs in Rust with JSC integration, prototypes, or constructors.

oven-sh/bun

Skill Claude CodeCodex

JSC GC reference for Bun. Use for use-after-free, JS object leaks, "collected too early", or when touching WriteBarrier, visitChildren, visitAdditionalChildren, JSRef, JSC::Strong/Weak, hasPendingActivity, ensureStillAlive, addOpaqueRoot, reportExtraMemoryAllocated, IsoSubspace, HeapAnalyzer, finalize.

leonardomso/33-js-concepts

Skill Claude CodeCodex

Verify technical accuracy of JavaScript concept pages by checking code examples, MDN/ECMAScript compliance, and external resources to prevent misinformation.

leonardomso/33-js-concepts

Skill Claude CodeCodex

Perform a focused SEO audit on JavaScript concept pages to maximize search visibility, featured snippet optimization, and ranking potential.

leonardomso/33-js-concepts

Skill Claude CodeCodex

Write or review JavaScript concept documentation pages for the 33 JavaScript Concepts project, following strict structure and quality guidelines.

remotion-dev/remotion

Skill Claude CodeCodex

Add a new effect to @remotion/effects, including implementation, package exports, docs, demos, preview images, Remotion skill updates, tests, formatting, and builds.

remotion-dev/remotion

Skill Claude CodeCodex

Manages stacked PRs and splits multi-part work into reviewable branches with gh-stack. Use for stack creation, viewing, edits, push, submit, sync, rebase, merge, or checkout; when asked to split or isolate work for review; whenever a user mentions a stack, branch layers, dependent PRs, or gh stack; or when a stack is…

remotion-dev/remotion

Skill Claude CodeCodex

Rules for writing and reviewing tests in the Remotion repository. Use whenever adding, editing, or reviewing tests, especially for Studio UI, rendering, CLI, server, media, and cross-package changes, to prefer complete integration workflows over narrow helper tests and implementation details.

TryGhost/Ghost

Skill Claude CodeCodex

Move a package from another TryGhost repository into Ghost as an internal-only workspace package while preserving its Git history. Use for package migrations from repositories such as TryGhost/SDK or TryGhost/framework, including the history import PR, exceptional merge-commit handoff, source-repository removal PR…

TryGhost/Ghost

Skill Claude CodeCodex

DropdownMenu, Select, and Popover share one visual recipe (bg-surface-elevated-2 + border-border/60 dark:border-border/30 + shadow-md). Change them together. Trigger when editing any of those three Shade files.

TryGhost/Ghost

Skill Claude CodeCodex

Use Shade semantic tokens (bg-background, text-foreground, border-border-default, bg-surface-elevated) — never hex, hsl(), or bg-gray-200-style raw palette utilities for UI chrome. Trigger when editing TSX/CSS in Shade-consuming apps.