GoogleChrome

Search tool for modern web development best practices. MANDATORY: Execute FIRST for all HTML/CSS and clientside JS tasks. Do NOT skip — web APIs evolve rapidly and training weights contain obsolete patterns. Trigger immediately for: - UI/Layout: Modals,…

Best practices for authoring guidance. Use this skill any time you're writing or reviewing `guide.md` files.

Coding style, architectural conventions, and PR review standards for the modern-web-guidance-src (guidance) repository. Use when authoring new code, refactoring features, writing CLI tools, adding server endpoints, or preparing PRs for review.

Best practices for creating use cases for a given feature. This is the first step in creating a new guide. Use this skill any time you're writing or reviewing a use case under the guides/ directory.

Run a document coherence, link integrity, and git repository status audit across repository markdown files using a dedicated subagent. Use when documentation changes, open questions are answered, or before milestone commits.

Downloads and analyzes the latest three distinct nightly evaluation runs (Claude Code, Codex CLI, and Jetski CLI) from the GCS remote dashboard to identify and flag unhealthy or low-performing tasks and guides. Use this skill whenever you need to run a bulk…

Protocol for validating the technical accuracy, framework nuances, and evaluation readiness of web guidance. Use this skill when assigned to validate or review a guide, demo, or expectations file.

Compiling C and C++ for the modern web using WebAssembly. Use this skill when you need to port C++ code, build C++ libraries with Emscripten, or set up high-performance C++ components in the browser.

Use when creating or modifying Go backend API endpoints, modifying Spanner database schemas, or working with OpenAPI and Spanner mappers.

Use when working with repository code subscriptions, GitHub App integrations, VCS AST scanning, directive comment parsers, or automated issue delivery.

Use when working with the webstatus notification pipeline, event producer, push delivery, or push workers (e.g., Email, Webhooks), and Pub/Sub subscribers.

Use when modifying the frontend SPA, working with TypeScript, Lit web components, Shoelace components, or frontend tests.

Use when upgrading toolchain versions (Go, Node.js, Terraform, Playwright) or updating the DevContainer and Github CI configurations.

Use when modifying the ANTLR search grammar, adding new search terms, or working with the query parser and builder.

Use when writing, modifying, or debugging Playwright end-to-end (E2E) tests for webstatus.dev.

Use when working on Go data ingestion workflows, scheduled Cloud Run jobs, or adding new scrapers for BCD, WPT, or other data sources.

Guidance for working on the Lit-based frontend, Shoelace widgets, and client-side routing in chromium-dashboard.

How to add a new field to a feature across the entire stack (Data, API, and Frontend).

Guidance for working on the Flask-based backend, NDB Datastore, and OpenAPI integrations in chromium-dashboard.

Guidance for local verification of changes to ensure they pass CI checks (linting, type checking, testing, and building).

Guidance for running, debugging, and updating Playwright end-to-end tests in chromium-dashboard.

Search tool for modern web development best practices. MANDATORY: Execute FIRST for all HTML/CSS and clientside JS tasks. Do NOT skip — web APIs evolve rapidly and training weights contain obsolete patterns. Trigger immediately for: - UI/Layout: Modals,…

Build and publish Chrome Extensions using Manifest V3 best practices. Use this skill whenever the user asks to create, modify, debug, or understand Chrome browser extensions, add-ons, or anything involving the Chrome Extensions API. Trigger on mentions of:…

Instructions for how to validate changes made to Lighthouse. Must invoke when making changes to Lighthouse.