cmd: add fallback for claude (#13892)

cmd/config/claude.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"path/filepath"
+	"runtime"
 )
 
 // Claude implements Runner for Claude Code integration
@@ -18,12 +20,32 @@ func (c *Claude) args(model string) []string {
 	return nil
 }
 
+func (c *Claude) findPath() (string, error) {
+	if p, err := exec.LookPath("claude"); err == nil {
+		return p, nil
+	}
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+	name := "claude"
+	if runtime.GOOS == "windows" {
+		name = "claude.exe"
+	}
+	fallback := filepath.Join(home, ".claude", "local", name)
+	if _, err := os.Stat(fallback); err != nil {
+		return "", err
+	}
+	return fallback, nil
+}
+
 func (c *Claude) Run(model string) error {
-	if _, err := exec.LookPath("claude"); err != nil {
+	claudePath, err := c.findPath()
+	if err != nil {
 		return fmt.Errorf("claude is not installed, install from https://code.claude.com/docs/en/quickstart")
 	}
 
-	cmd := exec.Command("claude", c.args(model)...)
+	cmd := exec.Command(claudePath, c.args(model)...)
 	cmd.Stdin = os.Stdin
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr