diff --git a/flake.nix b/flake.nix
index 2e300f4..26c2de2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -70,13 +70,56 @@
       colmenaHive = colmena.lib.makeHive self.outputs.colmena;
       colmena = hosts;
 
-      devShells.${system}.default = pkgs.mkShell {
-        buildInputs = with pkgs; [
-          lazygit
-          agenix.packages.${system}.agenix
-          colmena.packages.${system}.colmena
-        ];
+      devShells.${system} = {
+        default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            lazygit
+            agenix.packages.${system}.agenix
+            colmena.packages.${system}.colmena
+          ];
+        };
 
+        # Shell for testing Forgejo Actions locally
+        # Usage: nix develop .#ci-test
+        ci-test = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # Forgejo runner for exec command
+            forgejo-runner
+
+            # Packages matching forgejo-runner.nix hostPackages
+            bash
+            coreutils
+            curl
+            gawk
+            git
+            gnused
+            jq
+            nix
+            nodejs
+            wget
+
+            # Additional packages from systemPackages
+            colmena.packages.${system}.colmena
+          ];
+
+          shellHook = ''
+            # Wrapper that runs on host by default (matching your runner config)
+            ci() {
+              forgejo-runner exec -i "-self-hosted" "$@"
+            }
+
+            echo "🔧 Forgejo Actions test environment"
+            echo ""
+            echo "Usage: ci [options]"
+            echo ""
+            echo "Examples:"
+            echo "  ci --list -W .forgejo/workflows/                        # List jobs"
+            echo "  ci -W .forgejo/workflows/auto-update.yaml -j check-updates      # Run job"
+            echo "  ci -W .forgejo/workflows/auto-update.yaml -j check-updates -n   # Dry run"
+            echo "  ci -W .forgejo/workflows/auto-update.yaml -j check-updates -d   # Debug"
+            echo ""
+          '';
+        };
       };
 
     };