docs: clarify contribution guidelines

[KevinVandy]

🎯 Changes

Clarify how to submit focused, reviewable contributions to TanStack Store. Require contributors to search for duplicates, follow the PR template, understand any AI-assisted code, and include changesets for published package changes.

Add lightweight CodeRabbit anti-slop guidance and root agent instructions so automated reviewers and coding agents use the same contributing rules.

✅ Checklist

• I have followed the steps in the Contributing guide.
• Tests do not apply because this pull request changes documentation and review configuration only.
• I fully understand the code in this pull request, including any code generated with AI assistance.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

• Documentation
  • Added contributor guidance covering issue checks, focused pull requests, responsible AI use, changesets, and development requirements.
  • Added repository-wide instructions for following contribution and submission standards.
• Chores
  • Updated pull request checklists to support test exemptions and acknowledge AI-assisted contributions.
  • Added automated review configuration for code guidelines and slop detection.

[nx-cloud]

View your CI Pipeline Execution ↗ for commit a83dba3

Command	Status	Duration	Result
nx affected --targets=test:sherif,test:knip,tes...	✅ Succeeded	1m 2s	View ↗
nx run-many --target=build --exclude=examples/**	✅ Succeeded	<1s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-08-25 01:59:30 UTC

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 199d382f-d9cc-4632-9157-f40f813e1401

📥 Commits

Reviewing files that changed from the base of the PR and between a83dba3 and d008cfc.

📒 Files selected for processing (1)

• .coderabbit.yaml

🚧 Files skipped from review as they are similar to previous changes (1)

• .coderabbit.yaml

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.

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📝 Walkthrough

Walkthrough

The changes add contribution guidance, update the pull request checklist, and configure CodeRabbit to use CONTRIBUTING.md and revised review settings.

Changes

Contribution Workflow

Layer / File(s)	Summary
Contribution guidance CONTRIBUTING.md, AGENTS.md, .github/pull_request_template.md	Adds guidance for planning work, focused changes, generated code, required checks, pull request descriptions, responsible AI use, changesets, test exemptions, and AI-assisted code acknowledgment.
Review workflow configuration .coderabbit.yaml	Enables the CodeRabbit v2 schema, slop detection, and CONTRIBUTING.md guidelines. It disables the request-changes workflow.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to d008c

This change updates contribution guidance and review templates without changing published or runtime behavior; no actionable merge-blocking risk remains beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description follows the repository template. It explains the documentation and review-configuration changes, completes the checklist, and identifies the change as docs/CI/dev-only.
Title check	✅ Passed	The title clearly describes the primary change: clarifying contribution guidelines. It is concise and related to the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/contributing-guidelines

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commit: d008cfc