webspec-index

Query WHATWG, W3C, and TC39 web specifications from the command line.

8|9|Updated Feb 9, 2026
One-click install
npx skills add https://github.com/jnjaeschke/webspec-index --skill webspec-index
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: webspec-index
Source: https://github.com/jnjaeschke/webspec-index/tree/main
Command: npx skills add https://github.com/jnjaeschke/webspec-index --skill webspec-index

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Web developers often need quick access to precise spec content, section navigation, and cross-reference information without leaving the terminal. This Skill enables querying WHATWG, W3C, and TC39 web specs from the command line, returning sections, navigation data, and references for fast validation and exploration.

Core Features & Use Cases

  • Full-text search across WHATWG, W3C, and TC39 specifications
  • Cross-reference tracking (incoming/outgoing) between spec sections
  • Graph traversal and URL indexing for building cross-spec graphs
  • No-setup local indexing with a cached SQLite index for offline use

Quick Start

Use webspec-index to query a section, e.g. webspec-index query 'HTML#navigate'.

Frequently Asked Questions about webspec-index

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I query web specifications from the command line?

This Skill enables querying WHATWG, W3C, and TC39 web specifications directly from the command line. It allows developers to fetch, render, and navigate spec data locally for rapid retrieval and validation without leaving the terminal.

Can I search across WHATWG, W3C, and TC39 specs locally?

Yes, you can perform full-text search across WHATWG, W3C, and TC39 specifications locally. The tool uses a cached SQLite index, allowing offline access to section contents and precise spec data for fast exploration.

What is the best way to track cross-spec references for web specs?

The best way to track cross-spec references is by using a CLI tool that maps incoming and outgoing links between spec sections. It supports graph traversal and URL indexing to effectively build and navigate cross-spec reference graphs.

Do I need an internet connection to navigate web spec data offline?

You do not need a continuous internet connection to navigate web spec data offline. The tool provides no-setup local indexing with a cached SQLite index, allowing developers to query sections and references without being connected.

How do I retrieve a specific section from an HTML specification via CLI?

You can retrieve a specific section from an HTML specification by executing a targeted query command in your terminal. This fetches the exact section contents and navigation data locally, satisfying the need to verify algorithm steps quickly.