docs: comprehensive documentation update for Helm chart and MCP sidecars

- Added MCP sidecar configuration documentation across all docs
- Migrated from kustomize to Helm-based deployment instructions
- Updated Makefile with new helm-* targets, removed outdated k8s-* targets
- Rewrote DEPLOYMENT.md to focus on Helm chart deployment
- Transformed VARIABLES.md into complete Helm values reference
- Added MCP sidecar section to README.md with configuration examples

Key improvements:
- Clear instructions for enabling/disabling MCP servers
- Consistent Helm-based deployment throughout documentation
- Comprehensive values reference with examples
- Better organization for different deployment scenarios

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Makefile

@@ -44,26 +44,40 @@ clean: stop
 	@echo "Cleaning up..."
 	rm -rf ./home ./workspace
 
-# Kubernetes deployment
-k8s-deploy:
-	@echo "Deploying to Kubernetes..."
-	kubectl apply -k k8s/
+# Helm deployment
+RELEASE_NAME ?= mydev
+NAMESPACE ?= default
 
-k8s-delete:
-	@echo "Deleting from Kubernetes..."
-	kubectl delete -k k8s/
+helm-deploy:
+	@echo "Deploying with Helm (release: $(RELEASE_NAME))..."
+	@if [ -z "$(GITHUB_REPO)" ]; then \
+		echo "ERROR: GITHUB_REPO environment variable is required"; \
+		echo "Usage: GITHUB_REPO=https://github.com/user/repo make helm-deploy"; \
+		exit 1; \
+	fi
+	helm upgrade --install $(RELEASE_NAME) ./chart \
+		--namespace $(NAMESPACE) \
+		--set name=$(RELEASE_NAME) \
+		--set githubRepo="$(GITHUB_REPO)" \
+		--set image.repository=$(REGISTRY)/$(IMAGE_NAME) \
+		--set image.tag=$(IMAGE_TAG)
 
-k8s-logs:
-	@echo "Showing logs..."
-	kubectl logs -f antigravity-0
+helm-delete:
+	@echo "Deleting Helm release $(RELEASE_NAME)..."
+	helm uninstall $(RELEASE_NAME) --namespace $(NAMESPACE)
+	@echo "Note: PVC persists. To delete: kubectl delete pvc userhome-$(RELEASE_NAME) -n $(NAMESPACE)"
 
-k8s-shell:
-	@echo "Opening shell..."
-	kubectl exec -it antigravity-0 -- bash
+helm-logs:
+	@echo "Showing logs for $(RELEASE_NAME)..."
+	kubectl logs -f deployment/devcontainer-$(RELEASE_NAME) -n $(NAMESPACE)
 
-k8s-port-forward:
-	@echo "Port forwarding to localhost:5800..."
-	kubectl port-forward antigravity-0 5800:5800
+helm-shell:
+	@echo "Opening shell in $(RELEASE_NAME)..."
+	kubectl exec -it deployment/devcontainer-$(RELEASE_NAME) -n $(NAMESPACE) -- bash
+
+helm-port-forward:
+	@echo "Port forwarding $(RELEASE_NAME) to localhost:5800..."
+	kubectl port-forward deployment/devcontainer-$(RELEASE_NAME) 5800:5800 -n $(NAMESPACE)
 
 # Show help
 help:
@@ -78,24 +92,29 @@ help:
 	@echo "  stop               - Stop running container"
 	@echo "  clean              - Clean up containers and volumes"
 	@echo ""
-	@echo "Kubernetes Targets:"
-	@echo "  k8s-deploy         - Deploy to Kubernetes"
-	@echo "  k8s-delete         - Delete from Kubernetes"
-	@echo "  k8s-logs           - Show container logs"
-	@echo "  k8s-shell          - Open shell in container"
-	@echo "  k8s-port-forward   - Port forward to localhost"
+	@echo "Helm/Kubernetes Targets:"
+	@echo "  helm-deploy        - Deploy with Helm chart (requires GITHUB_REPO)"
+	@echo "  helm-delete        - Delete Helm release"
+	@echo "  helm-logs          - Show container logs"
+	@echo "  helm-shell         - Open shell in container"
+	@echo "  helm-port-forward  - Port forward to localhost"
 	@echo ""
 	@echo "Variables:"
 	@echo "  REGISTRY           - Docker registry (default: ghcr.io/cpfarhood)"
 	@echo "  IMAGE_NAME         - Image name (default: antigravity)"
 	@echo "  IMAGE_TAG          - Image tag (default: latest)"
+	@echo "  RELEASE_NAME       - Helm release name (default: mydev)"
+	@echo "  NAMESPACE          - Kubernetes namespace (default: default)"
+	@echo "  GITHUB_REPO        - GitHub repository URL (required for helm-deploy)"
 	@echo ""
 	@echo "Environment Variables for 'make run':"
 	@echo "  GITHUB_REPO        - GitHub repository URL"
 	@echo "  GITHUB_TOKEN       - GitHub token (optional)"
 	@echo "  VNC_PASSWORD       - VNC password (optional)"
 	@echo ""
-	@echo "Example:"
+	@echo "Examples:"
 	@echo "  make build"
 	@echo "  make push REGISTRY=ghcr.io/myuser IMAGE_TAG=v1.0"
 	@echo "  GITHUB_REPO=https://github.com/user/repo make run"
+	@echo "  GITHUB_REPO=https://github.com/user/repo make helm-deploy"
+	@echo "  RELEASE_NAME=alice-dev GITHUB_REPO=https://github.com/alice/project make helm-deploy"