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CONTRIBUTING.md

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+# Contributing
+
+Thank you for your interest in contributing to the 1Password load-secrets-action project 👋! Before you start, please take a moment to read through this guide to understand our contribution process.
+
+## Testing
+
+After following the steps below for signing commits, you can test against your PR with these steps:
+
+1. Create or use an existing repo to run the `load-secrets` GitHub Action
+2. In a workflow yaml file that uses the GitHub Action, modify the `uses: 1Password/load-secrets-action` line to be
+
+   ```
+   uses: 1Password/load-secrets-action@<branch-name>
+
+   # OR
+
+   uses: 1Password/load-secrets-action@<commit-hash>
+   ```
+
+3. Trigger the action, which now includes your changes
+
+## Documentation Updates
+
+If applicable, update the [README.md](./README.md) to reflect any changes introduced by the new code.
+
+## Sign your commits
+
+To get your PR merged, we require you to sign your commits.
+
+### Sign commits with 1Password
+
+You can also sign commits using 1Password, which lets you sign commits with biometrics without the signing key leaving the local 1Password process.
+
+Learn how to use [1Password to sign your commits](https://developer.1password.com/docs/ssh/git-commit-signing/).
+
+### Sign commits with ssh-agent
+
+Follow the steps below to set up commit signing with `ssh-agent`:
+
+1. [Generate an SSH key and add it to ssh-agent](https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent)
+2. [Add the SSH key to your GitHub account](https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account)
+3. [Configure git to use your SSH key for commits signing](https://docs.github.com/en/authentication/managing-commit-signature-verification/telling-git-about-your-signing-key#telling-git-about-your-ssh-key)
+
+### Sign commits with gpg
+
+Follow the steps below to set up commit signing with `gpg`:
+
+1. [Generate a GPG key](https://docs.github.com/en/authentication/managing-commit-signature-verification/generating-a-new-gpg-key)
+2. [Add the GPG key to your GitHub account](https://docs.github.com/en/authentication/managing-commit-signature-verification/adding-a-gpg-key-to-your-github-account)
+3. [Configure git to use your GPG key for commits signing](https://docs.github.com/en/authentication/managing-commit-signature-verification/telling-git-about-your-signing-key#telling-git-about-your-gpg-key)