feat: add --base-path flag so UI routes API calls to correct prefix

Allows running multiple instances (e.g. /claudomator and /claudomator-oss)
behind a reverse proxy. The server rewrites the base-path meta tag in
index.html at request time rather than baking it into the embed.

Also adds --branch support to deploy script for isolated branch builds
via git worktrees.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/internal/cli/serve.go b/internal/cli/serve.go
index dae66d6..ae42780 100644
--- a/internal/cli/serve.go
+++ b/internal/cli/serve.go
@@ -21,6 +21,7 @@ import (
 func newServeCmd() *cobra.Command {
 	var addr string
 	var workspaceRoot string
+	var basePath string
 
 	cmd := &cobra.Command{
 		Use:   "serve",
@@ -29,11 +30,12 @@ func newServeCmd() *cobra.Command {
 			if cmd.Flags().Changed("workspace-root") {
 				cfg.WorkspaceRoot = workspaceRoot
 			}
-			return serve(addr)
+			return serve(addr, basePath)
 		},
 	}
 
 	cmd.Flags().StringVar(&addr, "addr", ":8484", "listen address")
+	cmd.Flags().StringVar(&basePath, "base-path", "/claudomator", "URL prefix the UI is served under (e.g. /claudomator-oss)")
 	cmd.Flags().StringVar(&workspaceRoot, "workspace-root", "/workspace", "root directory for listing workspaces")
 	cmd.Flags().StringVar(&cfg.ClaudeImage, "claude-image", cfg.ClaudeImage, "docker image for claude agents")
 	cmd.Flags().StringVar(&cfg.GeminiImage, "gemini-image", cfg.GeminiImage, "docker image for gemini agents")
@@ -41,7 +43,7 @@ func newServeCmd() *cobra.Command {
 	return cmd
 }
 
-func serve(addr string) error {
+func serve(addr, basePath string) error {
 	if err := cfg.EnsureDirs(); err != nil {
 		return fmt.Errorf("creating dirs: %w", err)
 	}
@@ -153,6 +155,7 @@ func serve(addr string) error {
 	pool.RecoverStaleBlocked()
 
 	srv := api.NewServer(store, pool, logger, cfg.ClaudeBinaryPath, cfg.GeminiBinaryPath)
+	srv.SetBasePath(basePath)
 
 	// Configure notifiers: combine webhook (if set) with web push.
 	notifiers := []notify.Notifier{}