CleanLanguage.ai

Install

Pick the AI you use and follow the steps

You do not need a command line, a developer account, or knowledge of GitHub. Choosing an assistant hides the other assistants' steps, so you see only yours. Or scroll to read them all.

Scope

The condensed and compact files carry less of the finer detail than the full file. Skill upload is documented for desktop browsers; the mobile apps are not documented to support it.

Pick your AI

Get Clean Language

Get Clean Language

Clean Language comes in 2 forms. Download the one your assistant can use; if you are not sure, get both.

The skill

cleanlanguage-1.0.14.zip (opens in a new tab)

zip, version 1.0.14

For AI assistants that can use skills, like Claude, ChatGPT, and Copilot Studio. It installs the full standard so it is available in any chat. Do not unzip it.

The instructions file

cleanlanguage.md (opens in a new tab)

Markdown, full, 29 KB

For the assistants that cannot use skills, such as Gemini, a Microsoft 365 Copilot agent, and most others. The same standard in Markdown, in 3 sizes; also condensed, 11k (opens in a new tab) and compact, 8k (opens in a new tab).

Claude

Claude website or Claude Desktop

Last verified 27 August 2026.

This is the recommended Claude method. It installs the complete Skill, so the full standard is available in any chat. Install from a desktop browser. Use the skill (zip) you downloaded above.

  1. Click your name in the bottom-left corner, then Settings.
  2. Open your skills: on a personal account, click Customize; on a Team account, the Skills area sits under the Customize section.
  3. Click Add, then Upload skill.
  4. Select the downloaded Clean Language zip file, then click Save.
Cannot upload the skill? Use a Claude Project instead

In Claude, click Projects, then New Project, name it Clean Language, upload the instructions file under Project knowledge, and set the project instructions to: Use the Clean Language instructions in project knowledge for every response unless I explicitly tell you not to.

ChatGPT

ChatGPT

Last verified 27 August 2026.

ChatGPT can use the same packaged Skill as Claude. Upload it once, and ChatGPT applies Clean Language when your request calls for it.

  1. Click Plugins in the left menu bar, then Skills at the top, beside Plugins.
  2. Click the plus, then Upload from your computer.
  3. Select the downloaded Clean Language zip file.
  4. When the green check mark appears, click the X to close the window.

Gemini

Gemini website or Gemini app

Last verified 27 August 2026.

The easiest reusable method is a custom Gem. Create it once on the Gemini website, then use it from the website, mobile app, or supported Google Workspace side panel. Paste in the instructions file.

  1. On a computer, open gemini.google.com.
  2. Open the menu on the left, then click Gems.
  3. Click New Gem and name it Clean Language.
  4. Open cleanlanguage.md, copy all of it, and paste it into the Instructions box.
  5. Set no default tool, then click Save.

Copilot

Copilot

Last verified 1 September 2026.

There are 2 ways to set up Clean Language in Copilot. Copilot Studio loads the full skill, the same zip file Claude and ChatGPT use. A Microsoft 365 Copilot agent cannot load a skill, so it takes the standard as pasted instructions instead.

Copilot Studio

  1. On a computer, open copilotstudio.microsoft.com.
  2. Open your list of agents and click New agent.
  3. Click Skills, then upload the Clean Language zip file.
  4. Finish creating the agent as you normally would, and link it to your business processes.

Microsoft 365 Copilot agent

A Microsoft 365 Copilot agent caps its instructions at 8000 characters, so paste the 8k file as the instructions and add the full standard as reference.

  1. Open Microsoft 365 Copilot on a computer, open the agents panel and click New agent; click Skip to customize it yourself.
  2. Name it Clean Language.
  3. Open cleanlanguage-8k.md, copy all of it, and paste it into the Instructions box.
  4. Add https://cleanlanguage.ai/downloads/cleanlanguage.md as reference the agent can consult.
  5. Click Create, then select Clean Language whenever you write.

Other AI systems

Other AI systems

Platform-independent, so there is no interface to verify.

Clean Language also works with local models, API-based assistants, and other systems that accept custom instructions, system prompts, reusable knowledge, or uploaded files.

  1. Save the file, or copy everything from the instructions page.
  2. Add it to your AI system as custom instructions, project knowledge, a system prompt, or an attached reference file.
  3. Tell the AI: Use the Clean Language instructions for every response unless I explicitly tell you not to.