diff --git a/internal/update/update.go b/internal/update/update.go
index 66cd94d..2350c62 100644
--- a/internal/update/update.go
+++ b/internal/update/update.go
@@ -208,28 +208,51 @@ func detectInstallFromExecutable() (InstallInfo, error) {
 		return InstallInfo{Method: installMethodUnknown}, nil
 	}
 
+	invocationPath := executablePath
+	if lookupPath, lookupErr := exec.LookPath(os.Args[0]); lookupErr == nil {
+		invocationPath = lookupPath
+	}
+
 	resolvedPath := executablePath
-	if evalPath, evalErr := filepath.EvalSymlinks(executablePath); evalErr == nil {
+	if evalPath, evalErr := filepath.EvalSymlinks(invocationPath); evalErr == nil {
+		resolvedPath = evalPath
+	} else if evalPath, evalErr := filepath.EvalSymlinks(executablePath); evalErr == nil {
 		resolvedPath = evalPath
 	}
 
+	return detectInstallFromPaths(invocationPath, resolvedPath), nil
+}
+
+func detectInstallFromPaths(executablePath string, resolvedPath string) InstallInfo {
 	candidates := []string{filepath.ToSlash(executablePath), filepath.ToSlash(resolvedPath)}
 	for _, candidate := range candidates {
 		lower := strings.ToLower(candidate)
 
 		switch {
 		case strings.Contains(candidate, "/Cellar/metorial/"), strings.Contains(candidate, "/homebrew/opt/metorial/"), strings.Contains(candidate, "/linuxbrew/Cellar/metorial/"):
-			return InstallInfo{Method: installMethodHomebrew}, nil
+			return InstallInfo{Method: installMethodHomebrew}
 		case strings.Contains(lower, "/scoop/apps/metorial/"):
-			return InstallInfo{Method: installMethodScoop}, nil
+			return InstallInfo{Method: installMethodScoop}
 		case strings.Contains(lower, "/chocolatey/"):
-			return InstallInfo{Method: installMethodChocolatey}, nil
-		case strings.Contains(candidate, "/.metorial/cli/"):
-			return InstallInfo{Method: installMethodInstallSH}, nil
+			return InstallInfo{Method: installMethodChocolatey}
 		}
 	}
 
-	return InstallInfo{Method: installMethodUnknown}, nil
+	if strings.Contains(filepath.ToSlash(executablePath), "/.metorial/cli/") || strings.Contains(filepath.ToSlash(resolvedPath), "/.metorial/cli/") {
+		install := InstallInfo{
+			Method:            installMethodInstallSH,
+			ManagedBinaryPath: resolvedPath,
+		}
+
+		if executablePath != "" && resolvedPath != "" && executablePath != resolvedPath {
+			install.BinDir = filepath.Dir(executablePath)
+			install.SymlinkPath = executablePath
+		}
+
+		return install
+	}
+
+	return InstallInfo{Method: installMethodUnknown}
 }
 
 func upgradeHint(install InstallInfo) string {
diff --git a/internal/update/update_test.go b/internal/update/update_test.go
new file mode 100644
index 0000000..7840915
--- /dev/null
+++ b/internal/update/update_test.go
@@ -0,0 +1,59 @@
+package update
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestDetectInstallFromPathsInfersInstallScriptSymlinkMetadata(t *testing.T) {
+	t.Parallel()
+
+	install := detectInstallFromPaths(
+		"/usr/local/bin/metorial",
+		"/home/demo/.metorial/cli/metorial",
+	)
+
+	if install.Method != installMethodInstallSH {
+		t.Fatalf("detectInstallFromPaths() method = %q, want %q", install.Method, installMethodInstallSH)
+	}
+
+	if install.BinDir != "/usr/local/bin" {
+		t.Fatalf("detectInstallFromPaths() bin dir = %q, want %q", install.BinDir, "/usr/local/bin")
+	}
+
+	if install.SymlinkPath != "/usr/local/bin/metorial" {
+		t.Fatalf("detectInstallFromPaths() symlink path = %q, want %q", install.SymlinkPath, "/usr/local/bin/metorial")
+	}
+
+	if install.ManagedBinaryPath != "/home/demo/.metorial/cli/metorial" {
+		t.Fatalf("detectInstallFromPaths() managed binary path = %q, want %q", install.ManagedBinaryPath, "/home/demo/.metorial/cli/metorial")
+	}
+}
+
+func TestInstallSHUpgradeCommandUsesBinDir(t *testing.T) {
+	t.Parallel()
+
+	command, args, supported := installSHUpgradeCommand(InstallInfo{
+		Method: installMethodInstallSH,
+		BinDir: "/usr/local/bin",
+	})
+	if !supported {
+		t.Fatal("installSHUpgradeCommand() supported = false, want true")
+	}
+
+	if command != "sh" {
+		t.Fatalf("installSHUpgradeCommand() command = %q, want %q", command, "sh")
+	}
+
+	if len(args) != 2 {
+		t.Fatalf("installSHUpgradeCommand() args len = %d, want 2", len(args))
+	}
+
+	if !strings.Contains(args[1], `METORIAL_CLI_BIN_DIR="/usr/local/bin"`) {
+		t.Fatalf("installSHUpgradeCommand() args = %q, want bin dir export", args[1])
+	}
+
+	if !strings.Contains(args[1], `https://cli.metorial.com/install.sh`) {
+		t.Fatalf("installSHUpgradeCommand() args = %q, want install script URL", args[1])
+	}
+}
diff --git a/templates/install.sh b/templates/install.sh
index 17fd4ae..4f49cb8 100755
--- a/templates/install.sh
+++ b/templates/install.sh
@@ -132,6 +132,16 @@ resolve_managed_bin_path() {
   printf '%s/.metorial/cli/metorial' "$HOME"
 }
 
+json_escape() {
+  value="$1"
+  value="${value//\\/\\\\}"
+  value="${value//\"/\\\"}"
+  value="${value//$'\n'/\\n}"
+  value="${value//$'\r'/\\r}"
+  value="${value//$'\t'/\\t}"
+  printf '%s' "$value"
+}
+
 write_install_metadata() {
   install_dir="$1"
   symlink_path="$2"
@@ -143,9 +153,9 @@ write_install_metadata() {
   cat > "$metadata_path" <<EOF
 {
   "method": "install_sh",
-  "bin_dir": ${install_dir@Q},
-  "symlink_path": ${symlink_path@Q},
-  "managed_binary_path": ${managed_bin_path@Q}
+  "bin_dir": "$(json_escape "$install_dir")",
+  "symlink_path": "$(json_escape "$symlink_path")",
+  "managed_binary_path": "$(json_escape "$managed_bin_path")"
 }
 EOF
 }