[nucliweb]

Summary

Release of the stable issue codes (#316 to #321): the collection 2.1.0, the CLI 1.5.0 and the extension 0.2.0.

• Collection 2.1.0: every issue has a code, and a target when there is one issue per thing, listed under Issue codes in snippets/SCHEMA.md. The notes open with the one change that breaks a reader of a result: getINPDetails() of INP returns a result object instead of an array (merged on 2026-10-16, in the CLI since 1.1.0), now first under Changed. It goes out as a minor version, as the CLI did.
• CLI 1.5.0: the snippets with their codes, --baseline pairing the errors by code and target, and the issue codes of each snippet in webperf://schema/{snippet} of the MCP server.
• Extension 0.2.0: the audit comparison pairs issues by code and target, lists a change of severity as a change, and the downloaded report carries code and target.

package.json, cli/package.json, cli/server.json, extension/manifest.json and the lockfile go to the new versions, and so do the examples of the JSON in cli/README.md and content/CLI.mdx and the placeholder of the extension feedback form. Both changelogs move Unreleased to the release, with their links. The skills and llms.txt carry 2.1.0.

After the merge: push cli-v1.5.0 right away, since the Copy prompt of the site pins the version of cli/package.json, and approve npm-publish; then v2.1.0 and extension-v0.2.0, which publish the release notes and the zip of the extension.

Test plan

• node scripts/check-tag-version.js with v2.1.0, cli-v1.5.0 and extension-v0.2.0 (local): each matches its file; test:ci 22 of 22.
• Lint and CLI unit 329 of 329 (local); the suites of feat(snippets): give the issues of the CSS, font and image snippets of Loading a stable code, and require one #321 ran on the same code.
• npm run smoke:cli-package (local): the packed webperf-snippets-1.5.0.tgz installs in an empty folder; its MCP server lists 56 snippets, says how to install Chromium without it, and measures LCP after the install.
• npm run extension:zip (local) writes webperf-snippets-extension-0.2.0.zip.
• By hand with the packed package (local): the audit workflow on a page with five errors, measured with the published 1.4.0 as a baseline, without codes, against 1.5.0, with a code on each of the five: no new and no fixed errors, and the warning of another version of the CLI. The same with a baseline of 1.5.0: no new and no fixed errors.
• The extension by hand: an audit saved with 0.1.1 compared with one of 0.2.0 on the same page.

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Project	Deployment	Actions	Updated
webperf-snippets	Ready	Preview	Oct 25, 2026 12:56pm UTC