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HomeReleasesv2.1.246entry #395

Claude Code v2.1.246 ·

Bundled skill and reference text moved out of the JavaScript into embedded files

Built-in skills and their reference docs now load from embedded files rather than inline strings.

Under the hood Internal Changes
JSON All of v2.1.246
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SkillsArea: what it touches
Internal ChangesKind: in v2.1.246,
Internal ChangesSection of the release
What

The built-in skills and their reference documents ship the same content, but it is now read from files embedded in the binary instead of sitting in the JavaScript as giant strings.

Details
  • Affected: the design-sync, design-canvas, doc, whiteboard, prototype, data-visualization, plan-artifact, run-skill-generator, artifact-components, artifact-design, artifact-dashboard, artifact-diagramming, artifact-data-table and artifact-pr-review skills, their page and template HTML, their helper scripts, and the bundled API reference set for C#, Go, Java, PHP, Python, Ruby and TypeScript.
  • Paths of the form /$bunfs/root/<name>.md or .txt appear 164 times in this build and not at all in the previous one; references to that root total 1481.
  • Skill registrations, the lazy chunk loaders and the per-skill file listings are unchanged, so no skill was removed and nothing loads differently from the model's point of view.
  • A small normalizer was added to accept either a raw string or a module namespace from an embedded asset.
  • Practical effects: startup no longer parses tens of thousands of lines of prose as JavaScript source, and the prompt text is no longer greppable in the JavaScript bundle.
  • Unconditional, with no flag or environment variable involved.
Evidence

/$bunfs/root/sync-hashes.mjs-5rymp3zc.txt, /$bunfs/root/SKILL-8bdpvcbd.md, "templates/workshop-page.html": a,, references/plugin-eval-quickref.md, /$bunfs/root/color-formula-dc6qvg1m.md, /$bunfs/root/SKILL_COMPOSED-amaxbqpa.md, /$bunfs/root/cli-40vh1c3p.md, /$bunfs/root/SKILL-nrz66j7x.md, /$bunfs/root/platform-availability-nrkk9kb2.md, /$bunfs/root/token-counting-znjwtf00.md, /$bunfs/root/files-api-bmqt0y4f.md, /$bunfs/root/plugin-eval-quickref-2xg66zcm.md

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeFixed plugin skills whose frontmatter name already includes the <plugin>: prefix showing it doubled in the slash menu (e.g…

See this entry in the whole of v2.1.246 →

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