added contibuting doc

CONTRIBUTING.md

@@ -0,0 +1,201 @@
+# Contributing Guide
+
+Thank you for your interest in contributing. This project is open to
+anyone, and the workflow below explains exactly how to submit changes
+using a fork and a pull request.
+
+## 1. Fork the Repository
+
+To contribute, create your own copy:
+
+1.  Open this repository on github.com.
+2.  Click the **Fork** button in the top-right corner.
+3.  Select your GitHub account as the destination.
+4.  GitHub will create your personal fork at:
+    `https://github.com/<your-username>/afv-library`.
+
+## 2. Clone Your Fork
+
+Clone your personal fork:
+
+``` sh
+git clone https://github.com/<your-username>/afv-library.git
+cd afv-library
+```
+
+Add the original repository as the upstream remote:
+
+``` sh
+git remote add upstream https://github.com/forcedotcom/afv-library.git
+```
+
+## 3. Create a Branch
+
+Create a new branch for your work:
+
+``` sh
+git checkout -b my-feature-name
+```
+
+Use a short, descriptive name.
+
+## 4. Make Your Changes
+
+Perform your edits or add new functionality. When ready:
+
+``` sh
+git add .
+git commit -m "Describe your change clearly"
+```
+
+## 5. Push Your Branch
+
+``` sh
+git push origin my-feature-name
+```
+
+GitHub will display a **Compare & pull request** button.
+
+## 6. Open a Pull Request
+
+Once your branch is pushed to your fork, you can open a Pull Request
+(PR) to propose merging your changes into this repository.
+
+### 6.1 Start the Pull Request
+
+**Option A --- From the GitHub banner (easiest)**\
+After pushing your branch, GitHub shows a banner:
+
+> "Compare & pull request"
+
+Click it.
+
+**Option B --- Manually**
+
+1.  Go to your fork on GitHub:\
+    `https://github.com/<your-username>/afv-library`
+2.  Switch to your feature branch.
+3.  Click the **Pull requests** tab.
+4.  Click **New pull request**.
+5.  Click **compare across forks**.
+
+------------------------------------------------------------------------
+
+### 6.2 Select the Correct Base and Compare Settings
+
+Make sure GitHub is targeting the correct repositories and branches:
+
+-   **Base repository:** `forcedotcom/afv-library`
+-   **Base branch:** `main`
+-   **Head repository:** `<your-username>/afv-library`
+-   **Head branch:** your feature branch (`my-feature-name`)
+
+Correct configuration:
+
+    base: forcedotcom/afv-library → main
+    compare: <your-username>/afv-library → my-feature-name
+
+------------------------------------------------------------------------
+
+### 6.3 Write the Pull Request Title
+
+Use a clear, descriptive title. Examples:
+
+-   "Add examples for Apex prompt templates"
+-   "Fix typo in GPT-5 rule documentation"
+-   "Improve structure of LWC prompt guidelines"
+
+Avoid generic titles like "Update" or "Fix."
+
+------------------------------------------------------------------------
+
+### 6.4 Write a Detailed Pull Request Description
+
+Include:
+
+-   **What** you changed
+-   **Why** you changed it
+-   **How** it improves the library
+-   **Any follow-ups or questions**
+
+Suggested template:
+
+    ### Summary
+    Brief explanation of what this change adds or improves.
+
+    ### Changes
+    - List key changes
+    - Mention new files or docs
+    - Describe any refactoring
+
+    ### Motivation
+    Why this change is needed or helpful.
+
+    ### Notes
+    Anything reviewers should know or testing instructions.
+
+------------------------------------------------------------------------
+
+### 6.5 Submit the Pull Request
+
+Click **Create pull request**.
+
+------------------------------------------------------------------------
+
+### 6.6 Automatic Checks
+
+If the repository has CI or linting tools, GitHub will run checks.\
+Fix any failures by updating your branch and pushing again.
+
+------------------------------------------------------------------------
+
+### 6.7 Discussion & Review
+
+Maintainers may comment, request changes, or ask questions.
+
+To update your PR:
+
+``` sh
+git add .
+git commit -m "Address review feedback"
+git push
+```
+
+Your PR updates automatically.
+
+## 7. Address Review Feedback
+
+If maintainers request changes:
+
+``` sh
+git add .
+git commit -m "Update after review"
+git push
+```
+
+Your PR updates automatically.
+
+## 8. Keep Your Fork Updated
+
+Sync your fork with the upstream repo before starting new work:
+
+``` sh
+git checkout main
+git pull upstream main
+git push origin main
+```
+
+## 9. Merge
+
+A maintainer will merge your PR after approval.
+
+## Summary
+
+-   Fork the repo.
+-   Clone your fork.
+-   Create a branch.
+-   Make changes.
+-   Push the branch.
+-   Open a PR.
+-   Respond to feedback.
+-   Keep your fork updated.

README.md

@@ -205,11 +205,7 @@ requires_deploy: false
 
 ### How to Contribute
 
-1. Clone the repository
-2. Create a feature branch: `git checkout -b add-new-prompt`
-3. Add your prompt/rule following the format
-4. Test thoroughly
-5. Create a pull request with description
+See [Contributing](./CONTRIBUTING.md) for complete details.
 
 **Contribution checklist**
 - Confirm the file lives in the correct category folder