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FR-AI / ANALYSISWhy it is worth attention
It delivers deeply self-contained themes (CSS, sprites, fonts as data URIs), a technically intricate Final Fantasy theme with chocobo and party animations, and a privacy-focused design that eliminates remote code execution.
Who it is for
- Claude AI users who want visual customization
- Theme developers and designers
- Final Fantasy fans seeking a themed interface
- Privacy-conscious users wary of auto-updating extensions
Use cases
- Customizing the appearance of claude.ai with themed colours and assets
- Sharing themes via self-contained .yume.json files or one-click codes
- Developing and testing themes offline with a built-in studio and tooling
- Running a fully offline, non-auto-updating extension for consistent behavior
Strengths
- Exported themes are fully self-contained with no external dependencies
- Removed background.js and remote CSS fetching, reducing privacy risks
- Final Fantasy theme features detailed animations (party, chocobo, moogle) all in CSS
- Comprehensive developer tooling: packer, smoke tests, offline harness, and pixel-precise ripping scripts
Considerations
- As an unpacked extension, it will never auto-update — users must manually reinstall
- Any file change requires a reload of the extension card, not just the claude.ai tab
- The theme studio is present but not surfaced in the popup, reducing discoverability
README quick start
Yume Forge
A fork of Yume Themes for Claude (by Mohamed El-Harras) with three things added:
- Import / export / share — every theme has a ⤓ button that writes a
self-contained
.yume.jsonand copies aYUME1:code. Import a file, a code, or a.zipof either. - A Final Fantasy theme — menu-blue windows with hard white frames, a crystal beside every reply, and a four-person party idling on the composer.
- A theme studio — build themes from three colours, fine-tune all 29 of Claude's design tokens, add custom CSS, preview live on claude.ai. Present but not surfaced in the popup right now; it's the options page.
Download
The latest release contains two separate downloads:
yume-forge.zip— the complete modified Yume Forge browser add-on, including the bundled Final Fantasy theme and all other themes.yume-forge-final-fantasy.zip— only the self-contained Final Fantasy theme, for people who already have this modified Yume Forge add-on.
The theme-only zip can be imported directly; it does not need to be unzipped.
The original's 24 themes are all still here and untouched. The theme covers both faces of claude.ai: the Home chat and the Code tab (a separate app shell — its prompt becomes the menu window, the party and chocobo stage on it, the peeking mascot yields its perch, and every pulsing "working" dot is a hopping Mog).
Final Fantasy also hides a chocobo: every 5–10 minutes (first appearance
60–120 s after load) it picks one of three drive-bys — a parkour run that
sprints in along the bottom of the screen, leaps onto the composer, bowls the
party over one by one, leaps off the far edge and sprints back out (the whole
route is measured per-run, so any window width works); or clipped behind the
composer's top line in either direction, emerging from one frame edge and
vanishing into the other. It
skips hidden tabs and reduced-motion users. To preview without waiting:
chrome.storage.local.set({ yumeChocoNow: "a" }) (or "b"/"c") from any
extension console.
Install
It's an unpacked extension — nothing to build.
- Unzip
yume-forge.zipif you haven't (Load unpacked needs a folder, not the archive) - Open
chrome://extensions(or `arc://extens
Description
Yume Forge Modified with a bundled Final Fantasy theme for Claude
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