Ignore changes to MIG version block on runner instance group manager

.github/workflows/release.yml

@@ -61,13 +61,13 @@ jobs:
         id: changelog
         run: |
           if [ -n "${{ steps.prev_tag.outputs.tag }}" ]; then
-            # Get commits between tags, excluding automated image update commits
-            CHANGELOG=$(git log --pretty=format:"- %s (%h)" \
+            # Get non-merge commits between tags, excluding automated image update commits
+            CHANGELOG=$(git log --no-merges --pretty=format:"- %s (%h)" \
               "${{ steps.prev_tag.outputs.tag }}..${RELEASE_TAG}" \
               --grep="Update GCP runner, proxy, prometheus, and node-exporter images" --invert-grep)
           else
-            # First release - get all commits excluding automated ones
-            CHANGELOG=$(git log --pretty=format:"- %s (%h)" \
+            # First release - get all non-merge commits excluding automated ones
+            CHANGELOG=$(git log --no-merges --pretty=format:"- %s (%h)" \
               --grep="Update GCP runner, proxy, prometheus, and node-exporter images" --invert-grep)
           fi
 
@@ -91,8 +91,8 @@ jobs:
             if [ -n "$CHANGED_FILES" ]; then
               echo "has_changes=true" >> $GITHUB_OUTPUT
 
-              # Get commits that touched IAM files
-              IAM_COMMITS=$(git log --pretty=format:"- %s (%h)" \
+              # Get non-merge commits that touched IAM files
+              IAM_COMMITS=$(git log --no-merges --pretty=format:"- %s (%h)" \
                 "${{ steps.prev_tag.outputs.tag }}..${RELEASE_TAG}" \
                 --grep="Update GCP runner, proxy, prometheus, and node-exporter images" --invert-grep \
                 -- $IAM_FILES)
@@ -124,7 +124,12 @@ jobs:
       - name: Build release body
         id: body
         run: |
-          cat << 'EOF' > release_body.md
+          # Derive docs anchor from manifest version: 20260508.526 -> 20260508-526
+          DOCS_ANCHOR=$(echo "${{ steps.manifest.outputs.version }}" | tr '.' '-')
+
+          cat << EOF > release_body.md
+          For application changes in the GCP runner itself, see the [release notes](https://ona.com/docs/release-notes/gcp-runner#${DOCS_ANCHOR}).
+
           ## Container Images
 
           | Component | Image |

CONTRIBUTING.md

@@ -0,0 +1,62 @@
+# Contributing
+
+[![Build with Ona](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/gitpod-io/terraform-google-ona-runner)
+
+This document provides guidelines for contributing to the Ona GCP Runner Terraform module.
+
+## Development Environment
+
+The easiest way to get started is to open this repository in [Ona](https://ona.com/) or run the included [dev container](.devcontainer/) locally with [VS Code Dev Containers](https://code.visualstudio.com/docs/devcontainers/containers) or any compatible IDE. The dev container comes pre-configured with all required tools.
+
+If you prefer a manual setup, install the following:
+
+- [Terraform](https://terraform.io/) >= 1.0
+- [Google Cloud SDK](https://cloud.google.com/sdk/install)
+- [pre-commit](https://pre-commit.com/)
+- [terraform-docs](https://github.com/terraform-docs/terraform-docs)
+
+## File Structure
+
+| Path | Description |
+|---|---|
+| `*.tf` | Root module resources |
+| `variables.tf` | Input variables |
+| `outputs.tf` | Output values |
+| `versions.tf` | Provider and Terraform version constraints |
+| `modules/` | Submodules |
+| `examples/` | Example configurations |
+| `docs/` | Additional documentation |
+| `files/` | Template files used by resources |
+
+## Making Changes
+
+1. Fork the repository and create a feature branch.
+2. Make your changes, following the conventions below.
+3. Run linting and formatting checks.
+4. Submit a pull request against `main`.
+
+### Linting and Formatting
+
+This repository uses [pre-commit](https://pre-commit.com/) hooks for `terraform fmt`, `terraform-docs`, `shellcheck`, and general file hygiene. Install the hooks once after cloning:
+
+```bash
+pre-commit install
+```
+
+To run all checks manually:
+
+```bash
+pre-commit run --all-files
+```
+
+### Generating Documentation
+
+Input and output tables in README files are generated automatically by `terraform-docs` via pre-commit. If you change `variables.tf` or `outputs.tf`, the tables will be updated on your next commit. You can also regenerate them manually:
+
+```bash
+pre-commit run terraform_docs --all-files
+```
+
+## License
+
+By contributing, you agree that your contributions will be licensed under the [Mozilla Public License 2.0](LICENSE).