Use WebFetch to extract the main text, links, images, and other content from a public webpage as structured JSON without creating a Browser Session, ready for integration into knowledge bases or data pipelines.

Mandatory prerequisite: First fetch and fully execute the official Lexmount Setup Prompt returned by https://browser.lexmount.cn/api/agent-setup/webfetch-cli, completing installation, authentication, and environment validation. Continue only after every check passes. If the URL is unreachable or validation fails, stop immediately and report it; never skip the setup or pretend it succeeded.
Task: Use webfetch-cli only to extract https://cn.vuejs.org/guide/introduction and save the structured result to artifacts/vue-introduction.json in the working directory.
Fields: Preserve the requested URL, final URL, status code, title, description, body, author, publication time, language, links, images, engine, timing, and warnings. Use null, an empty string, or an empty array for missing fields, and never invent data.
Execution: Do not create a Browser Session or switch to a local crawler, custom browser code, Playwright, Puppeteer, or an SDK. If the page requires login or human interaction, report that the task is not applicable.
Acceptance: Success requires a successful command and an existing, non-empty file that can be parsed as JSON. Report failure truthfully for a timeout, API error, non-JSON response, or missing structured result.
Return: Report only the status, final URL, title, file path, count of key fields, warnings, and error summary. Do not expose API keys, authentication data, or internal connection URLs.