fix: safety guard incorrectly blocks commands with URLs

The absolutePathPattern regex was matching URL path components like
//github.com as file system paths, causing commands containing URLs
to be incorrectly blocked by the workspace restriction safety guard.

For example, 'agent-browser open https://github.com' would be blocked
because //github.com was treated as an absolute file path outside
the working directory.

The fix adds a check to skip any path match that starts with '//',
as these are URL path components, not file system paths.

Fixes #1203

pkg/tools/shell.go

@@ -339,6 +339,14 @@ func (t *ExecTool) guardCommand(command, cwd string) string {
 		matches := absolutePathPattern.FindAllString(cmd, -1)
 
 		for _, raw := range matches {
+			// Skip URL path components that look like they're from URLs.
+			// When a URL like "https://github.com" is parsed, the regex captures
+			// "//github.com" as a match (the path portion after "https:").
+			// These double-slash prefixes indicate URL paths, not file system paths.
+			if strings.HasPrefix(raw, "//") {
+				continue
+			}
+
 			p, err := filepath.Abs(raw)
 			if err != nil {
 				continue

pkg/tools/shell_test.go

@@ -443,3 +443,32 @@ func TestShellTool_CustomAllowPatterns(t *testing.T) {
 		t.Errorf("'git push upstream main' should still be blocked by deny pattern")
 	}
 }
+
+// TestShellTool_URLsNotBlocked verifies that commands containing URLs are not
+// incorrectly blocked by the workspace restriction safety guard (issue #1203).
+func TestShellTool_URLsNotBlocked(t *testing.T) {
+	tmpDir := t.TempDir()
+	tool, err := NewExecTool(tmpDir, true)
+	if err != nil {
+		t.Fatalf("unable to configure exec tool: %s", err)
+	}
+
+	// These commands contain URLs and should NOT be blocked by workspace restriction.
+	// The URL path components (e.g., "//github.com") should be recognized as URLs,
+	// not as file system paths.
+	commands := []string{
+		"agent-browser open https://github.com",
+		"curl https://api.example.com/data",
+		"wget http://example.com/file",
+		"browser open https://github.com/user/repo",
+		"fetch ftp://ftp.example.com/file.txt",
+		"git clone https://github.com/sipeed/picoclaw.git",
+	}
+
+	for _, cmd := range commands {
+		result := tool.Execute(context.Background(), map[string]any{"command": cmd})
+		if result.IsError && strings.Contains(result.ForLLM, "path outside working dir") {
+			t.Errorf("command with URL should not be blocked by workspace check: %s\n  error: %s", cmd, result.ForLLM)
+		}
+	}
+}