Docs: Add AI contributions guide in contributing.md and documentation

[huang-julien]

Closes #

What I did

This PR update the contribution guide to include AI assisted PRs. Heavily inspired by Vitest contributing.md.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

no test

Caution

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook publish.yml --field pr=<PR_NUMBER>

Summary by CodeRabbit

Documentation

• Updated contribution guidelines with new policies for AI-assisted submissions
• AI tools used in PR creation must be disclosed
• Fully AI-generated issues and PRs without human involvement will be labeled and auto-closed after 3 days
• Low-value or incorrect AI-generated comments may be hidden and could result in spam-related bans

[kylegach]

Good work!

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 719a8a70-3530-4c48-a189-356897b54d41

📥 Commits

Reviewing files that changed from the base of the PR and between ad5c2a9 and ee5ddc1.

📒 Files selected for processing (2)

• CONTRIBUTING.md
• docs/contribute/index.mdx

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📝 Walkthrough

Walkthrough

This pull request adds documentation sections to establish guidelines for AI-assisted contributions. Two documentation files were updated with policies requiring human authorship through official templates, mandatory disclosure of AI tools used in PR creation, and procedures for handling fully AI-generated or low-value AI-generated content in issues, pull requests, and comments.

Changes

Cohort / File(s)	Summary
AI Contribution Guidelines CONTRIBUTING.md, docs/contribute/index.mdx	Added new sections establishing policies for AI involvement in contributions, including requirements for human authorship via official templates, disclosure of AI tool usage, auto-close procedures for fully AI-generated submissions, and handling of low-value AI-generated comments.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• #33568: Identical AI contribution policy documentation changes added to CONTRIBUTING.md and contribution guidelines in the Storybook repository.

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