Merge pull request #34502 from storybookjs/docs/ai_contribution_guide

Docs: Add AI contributions guide in contributing.md and documentation
(cherry picked from commit 7022915)

Author: huang-julien

CONTRIBUTING.md

@@ -20,6 +20,18 @@ If you're not sure where to start, you can always help us by:
 
 > **Note**: Before you start contributing, please read the [Code of Conduct](./CODE_OF_CONDUCT.md) and reach out to the maintainers if you have any questions or concerns about the project or the contribution process on the [`#contributing`](https://discord.com/channels/486522875931656193/839297503446695956) channel on Discord.
 
+## About AI contributions: Never let an LLM speak for you
+
+The team welcomes the use of AI as a personal assistant when contributing to Storybook. However, we strongly believe that a real person must be behind every issue and pull request.
+
+All issues and pull requests must be opened by a real person using the official templates. If AI assisted in creating a pull request, please disclose the tool used (e.g. Claude, Codex, Copilot).
+
+Pull requests or issues entirely generated by AI with no human involvement (e.g. by an automated agent) will be labeled by maintainers and closed automatically after 3 days unless a real person responds.
+
+AI-generated comments on issues, pull requests or discussions that add no value or contain incorrect information will be hidden by the maintainers and can be subject to a ban if this becomes a spam behavior.
+
+These measures help reduce maintenance burden and keep the team's work efficient.
+
 ## Quick guide 
 
 ### Prerequisites 

docs/contribute/index.mdx

@@ -26,3 +26,17 @@ In the interest of fostering an open and welcoming environment, we as contributo
 * [Chat in Discord `#contributing`](https://discord.com/channels/486522875931656193/839297503446695956)
 * [Browse "good first issues" to fix](https://github.com/storybookjs/storybook/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22)
 * [Submit a bug report or feature request](https://github.com/storybookjs/storybook/issues)
+
+## AI contributions
+
+### Never let an LLM speak for you
+
+The team welcomes the use of AI as a personal assistant when contributing to Storybook. However, we strongly believe that a real person must be behind every issue and pull request.
+
+All issues and pull requests must be opened by a real person using the official templates. If AI assisted in creating a pull request, please disclose the tool used (e.g. Claude, Codex, Copilot).
+
+Pull requests or issues entirely generated by AI with no human involvement (e.g. by an automated agent) will be labeled by maintainers and closed automatically after 3 days unless a real person responds.
+
+AI-generated comments on issues, pull requests or discussions that add no value or contain incorrect information will be hidden by the maintainers and can be subject to a ban if this becomes a spam behavior.
+
+These measures help reduce maintenance burden and keep the team's work efficient.