feat: add agent selector to UI and support direct agent assignment

- Added an agent selector (Auto, Claude, Gemini) to the Start Next Task button.
- Updated the backend to pass query parameters as environment variables to scripts.
- Modified the executor pool to skip classification when a specific agent is requested.
- Added --agent flag to claudomator start command.
- Updated tests to cover the new functionality.

3 files changed, 14 insertions, 10 deletions

diff --git a/internal/cli/create.go b/internal/cli/create.go
index e5435d3..396cd77 100644
--- a/internal/cli/create.go
+++ b/internal/cli/create.go
@@ -88,7 +88,7 @@ func createTask(serverURL, name, instructions, workingDir, model, agentType, par
 	fmt.Printf("Created task %s\n", id)
 
 	if autoStart {
-		return startTask(serverURL, id)
+		return startTask(serverURL, id, agentType)
 	}
 	return nil
 }
diff --git a/internal/cli/create_test.go b/internal/cli/create_test.go
index 4ce1071..71b403e 100644
--- a/internal/cli/create_test.go
+++ b/internal/cli/create_test.go
@@ -42,7 +42,7 @@ func TestStartTask_EscapesTaskID(t *testing.T) {
 	}))
 	defer srv.Close()
 
-	err := startTask(srv.URL, "task/with/slashes")
+	err := startTask(srv.URL, "task/with/slashes", "")
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -93,7 +93,7 @@ func TestStartTask_NonJSONResponse_ReturnsError(t *testing.T) {
 	}))
 	defer srv.Close()
 
-	err := startTask(srv.URL, "task-abc")
+	err := startTask(srv.URL, "task-abc", "")
 	if err == nil {
 		t.Fatal("expected error for non-JSON response, got nil")
 	}
@@ -115,7 +115,7 @@ func TestStartTask_TimesOut(t *testing.T) {
 	httpClient = &http.Client{Timeout: 50 * time.Millisecond}
 	defer func() { httpClient = orig }()
 
-	err := startTask(srv.URL, "task-abc")
+	err := startTask(srv.URL, "task-abc", "")
 	if err == nil {
 		t.Fatal("expected timeout error, got nil")
 	}
diff --git a/internal/cli/start.go b/internal/cli/start.go
index 9e66e00..99af9a5 100644
--- a/internal/cli/start.go
+++ b/internal/cli/start.go
@@ -8,28 +8,32 @@ import (
 
 	"github.com/spf13/cobra"
 )
-
 func newStartCmd() *cobra.Command {
 	var serverURL string
+	var agent string
 
 	cmd := &cobra.Command{
 		Use:   "start <task-id>",
 		Short: "Queue a task for execution via the running server",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			return startTask(serverURL, args[0])
+			return startTask(serverURL, args[0], agent)
 		},
 	}
 
 	cmd.Flags().StringVar(&serverURL, "server", "http://localhost:8484", "claudomator server URL")
+	cmd.Flags().StringVar(&agent, "agent", "", "agent to use (claude, gemini, or auto)")
 	return cmd
 }
 
-func startTask(serverURL, id string) error {
-	url := fmt.Sprintf("%s/api/tasks/%s/run", serverURL, url.PathEscape(id))
-	resp, err := httpClient.Post(url, "application/json", nil) //nolint:noctx
+func startTask(serverURL, id, agent string) error {
+	u := fmt.Sprintf("%s/api/tasks/%s/run", serverURL, url.PathEscape(id))
+	if agent != "" {
+		u += "?agent=" + url.QueryEscape(agent)
+	}
+	resp, err := httpClient.Post(u, "application/json", nil) //nolint:noctx
 	if err != nil {
-		return fmt.Errorf("POST %s: %w", url, err)
+		return fmt.Errorf("POST %s: %w", u, err)
 	}
 	defer resp.Body.Close()