fix(exec): ignore URL segments in workspace guard

pkg/tools/shell.go

@@ -12,6 +12,8 @@ import (
 	"runtime"
 	"strings"
 	"time"
+	"unicode"
+	"unicode/utf8"
 
 	"github.com/sipeed/picoclaw/pkg/config"
 	"github.com/sipeed/picoclaw/pkg/constants"
@@ -78,7 +80,8 @@ var (
 		regexp.MustCompile(`\bsource\s+.*\.sh\b`),
 	}
 
-	// absolutePathPattern matches absolute file paths in commands (Unix and Windows).
+	// absolutePathPattern matches path-like substrings in commands (Unix and Windows).
+	// A separate boundary check is applied before treating a match as a filesystem path.
 	absolutePathPattern = regexp.MustCompile(`[A-Za-z]:\\[^\\\"']+|/[^\s\"']+`)
 
 	// safePaths are kernel pseudo-devices that are always safe to reference in
@@ -373,7 +376,7 @@ func (t *ExecTool) guardCommand(command, cwd string) string {
 			return ""
 		}
 
-		matches := absolutePathPattern.FindAllString(cmd, -1)
+		matches := findAbsolutePathMatches(cmd)
 
 		for _, raw := range matches {
 			p, err := filepath.Abs(raw)
@@ -399,6 +402,37 @@ func (t *ExecTool) guardCommand(command, cwd string) string {
 	return ""
 }
 
+func findAbsolutePathMatches(command string) []string {
+	indexes := absolutePathPattern.FindAllStringIndex(command, -1)
+	if len(indexes) == 0 {
+		return nil
+	}
+
+	matches := make([]string, 0, len(indexes))
+	for _, idx := range indexes {
+		start := idx[0]
+		if !isPathBoundary(command, start) {
+			continue
+		}
+		matches = append(matches, command[start:idx[1]])
+	}
+
+	return matches
+}
+
+func isPathBoundary(command string, start int) bool {
+	if start <= 0 {
+		return true
+	}
+
+	r, _ := utf8.DecodeLastRuneInString(command[:start])
+	if unicode.IsSpace(r) {
+		return true
+	}
+
+	return strings.ContainsRune(`"'=<>|&;()[]{},`, r)
+}
+
 func (t *ExecTool) SetTimeout(timeout time.Duration) {
 	t.timeout = timeout
 }

pkg/tools/shell_test.go

@@ -489,6 +489,50 @@ func TestShellTool_SafePathsInWorkspaceRestriction(t *testing.T) {
 	}
 }
 
+func TestShellTool_GuardCommand_IgnoresURLPathSegments(t *testing.T) {
+	tmpDir := t.TempDir()
+	tool, err := NewExecTool(tmpDir, true)
+	if err != nil {
+		t.Fatalf("unable to configure exec tool: %s", err)
+	}
+
+	commands := []string{
+		`curl -s "wttr.in/Beijing?T"`,
+		`curl -s https://example.com/api/v1/weather`,
+	}
+
+	for _, cmd := range commands {
+		if got := tool.guardCommand(cmd, tmpDir); got != "" {
+			t.Fatalf("guardCommand(%q) = %q, want empty", cmd, got)
+		}
+	}
+}
+
+func TestShellTool_GuardCommand_BlocksAbsolutePathOutsideWorkspace(t *testing.T) {
+	root := t.TempDir()
+	workspace := filepath.Join(root, "workspace")
+	outsideDir := filepath.Join(root, "outside")
+	outsideFile := filepath.Join(outsideDir, "secret.txt")
+	if err := os.MkdirAll(workspace, 0o755); err != nil {
+		t.Fatalf("failed to create workspace: %v", err)
+	}
+	if err := os.MkdirAll(outsideDir, 0o755); err != nil {
+		t.Fatalf("failed to create outside dir: %v", err)
+	}
+	if err := os.WriteFile(outsideFile, []byte("secret"), 0o644); err != nil {
+		t.Fatalf("failed to create outside file: %v", err)
+	}
+
+	tool, err := NewExecTool(workspace, true)
+	if err != nil {
+		t.Fatalf("unable to configure exec tool: %s", err)
+	}
+
+	if got := tool.guardCommand(`cat "`+outsideFile+`"`, workspace); !strings.Contains(got, "path outside working dir") {
+		t.Fatalf("guardCommand should block outside path, got %q", got)
+	}
+}
+
 // TestShellTool_CustomAllowPatterns verifies that custom allow patterns exempt
 // commands from deny pattern checks.
 func TestShellTool_CustomAllowPatterns(t *testing.T) {