Voyager

How it works

Voyager keeps three things apart.

• Sites. One small file per site says where things are on its page: the sidebar, a message, the composer.
• Primitives. Abilities Voyager ships once and runs anywhere: a timeline, folders, formula copy, diagrams, export.
• Plugins. Plain JSON that points primitives and CSS at those places. Nothing in a plugin runs as code, and every change it makes comes off when you turn it off.

So a site that redesigns its page needs one file fixed, and on ChatGPT, Claude, DeepSeek and Kimi that fix arrives from the plugin catalog without an extension update. A new site is one more file. And a plugin written once runs on every site it names.

This is the core of a plugin that blurs the sidebar before you take a screenshot, on four sites:

{
  "matches": [
    "https://gemini.google.com/*",
    "https://chatgpt.com/*",
    "https://claude.ai/*",
    "https://chat.deepseek.com/*"
  ],
  "contributes": {
    "styles": [{ "css": ".gv-shot-blur { filter: blur(6px) }" }],
    "domOps": [
      {
        "op": "addClass",
        "className": "gv-shot-blur",
        "target": { "kind": "semantic", "key": "sidebar" }
      }
    ]
  }
}

sidebar is a name, not a selector. Each site's file says what it means there.

Voyager's own features are built the same way. The timeline, formula copy, quote reply, reading width and nearly everything else ship as official plugins on top of the same primitives. Folders on Gemini and AI Studio are the last piece still running as built-in code, and they are moving over too.

What you get

● works once installed · ○ one switch in the popup

Feature	Gemini	AI Studio	ChatGPT	Claude	DeepSeek	Kimi
Folders	●	●	●	○	○	○
Timeline	●		○	○	○
Export	●		○	○	○	○
Formula copy	●	●	○	○	○
Quote reply	●		○	○	○	○
Diagrams	●		○
Reading width and typography	○		○	○	○	○
Vim keys in the input box	○		○	○	○
Send key	○	○	○	○	○	○

On every site, and on any other site you add, localhost included:

• Prompt library: one library that follows you, here inside DeepSeek Harness.
• Cloud sync: folders and prompts through Google Drive, or iCloud on Safari.

Gemini also gets Deep Research export, watermark-free images, forks, context sync, a default model and a Markdown fix. The full table, with every plugin, is on the plugins page.

During the February 18 Gemini incident, when some users could no longer open their past chats, Voyager users still had them in their folders.

Make it yours

A plugin you write lives only in your browser and needs no pull request.

• Say it on the page. In the Voyager panel's Create tab, write one sentence and choose Create on this page. The site's AI writes the plugin, and Voyager offers Preview and install under its reply. Create mode
• Ask the AI you are chatting with. In the popup's My creations card, write one sentence and choose Copy for this chat. Paste it into the chat; Voyager checks the reply and shows what it changes before you import it.
• Hand it to a coding agent. Copy for a local agent gives Claude Code, Codex or Cursor your request and the skill at https://voyager.nagi.fun/skills/write-voyager-plugin/SKILL.md.
• Write it by hand. npx create-voyager-plugin@latest init my-plugin --site claude, then check runs the same checks as the import.

A plugin cannot run scripts, load anything from the network or read what your messages say. What a plugin can do

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Install

[!NOTE] On Gemini for Enterprise, only the prompt library runs.

For manual installation or development builds, please refer to the Installation Guide.

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Support this project

If Voyager makes your life easier, consider buying me a coffee. It helps keep the updates coming! Sponsors will be featured in our Special Thanks section. ❤️

This is the beginning of the README. Read the rest at the original. Read the full README ↗