diff --git a/app/src/main/java/io/xpipe/app/terminal/ExternalTerminalType.java b/app/src/main/java/io/xpipe/app/terminal/ExternalTerminalType.java
index cf1ec243..d4ff6cc5 100644
--- a/app/src/main/java/io/xpipe/app/terminal/ExternalTerminalType.java
+++ b/app/src/main/java/io/xpipe/app/terminal/ExternalTerminalType.java
@@ -577,7 +577,8 @@ public interface ExternalTerminalType extends PrefsChoiceValue {
         }
 
         @Override
-        public String additionalInitCommands(ShellControl sc) {
+        public TerminalInitFunction additionalInitCommands() {
+            return TerminalInitFunction.of(sc -> {
             if (sc.getShellDialect() == ShellDialects.ZSH) {
                 return "printf '\\eP$f{\"hook\": \"SourcedRcFileForWarp\", \"value\": { \"shell\": \"zsh\"}}\\x9c'";
             }
@@ -588,6 +589,7 @@ public interface ExternalTerminalType extends PrefsChoiceValue {
                 return "printf '\\eP$f{\"hook\": \"SourcedRcFileForWarp\", \"value\": { \"shell\": \"fish\"}}\\x9c'";
             }
             return null;
+            });
         }
     };
     ExternalTerminalType CUSTOM = new CustomTerminalType();
@@ -670,8 +672,8 @@ public interface ExternalTerminalType extends PrefsChoiceValue {
                 .orElse(null);
     }
 
-    default String additionalInitCommands(ShellControl sc) {
-        return null;
+    default TerminalInitFunction additionalInitCommands() {
+        return TerminalInitFunction.none();
     }
 
     boolean supportsTabs();
diff --git a/app/src/main/java/io/xpipe/app/util/TerminalLauncher.java b/app/src/main/java/io/xpipe/app/util/TerminalLauncher.java
index ef0ec776..47ea33bf 100644
--- a/app/src/main/java/io/xpipe/app/util/TerminalLauncher.java
+++ b/app/src/main/java/io/xpipe/app/util/TerminalLauncher.java
@@ -32,7 +32,7 @@ public class TerminalLauncher {
                             title,
                             type.shouldClear()
                                     && AppPrefs.get().clearTerminalOnInit().get(),
-                    type.additionalInitCommands(sc)));
+                    null));
             var config = new ExternalTerminalType.LaunchConfiguration(null, title, title, script, sc.getShellDialect());
             type.launch(config);
         }
@@ -55,7 +55,7 @@ public class TerminalLauncher {
         var terminalConfig = new TerminalInitScriptConfig(
                 adjustedTitle,
                 type.shouldClear() && AppPrefs.get().clearTerminalOnInit().get(),
-                cc instanceof ShellControl sc ? type.additionalInitCommands(sc) : null);
+                cc instanceof ShellControl sc ? type.additionalInitCommands() : TerminalInitFunction.none());
 
         var request = UUID.randomUUID();
         var d = ProcessControlProvider.get().getEffectiveLocalDialect();
diff --git a/core/src/main/java/io/xpipe/core/process/ShellControl.java b/core/src/main/java/io/xpipe/core/process/ShellControl.java
index 3515386e..72b702fa 100644
--- a/core/src/main/java/io/xpipe/core/process/ShellControl.java
+++ b/core/src/main/java/io/xpipe/core/process/ShellControl.java
@@ -94,7 +94,7 @@ public interface ShellControl extends ProcessControl {
     ShellControl withErrorFormatter(Function<String, String> formatter);
 
     String prepareIntermediateTerminalOpen(
-            String content, TerminalInitScriptConfig config, WorkingDirectoryFunction workingDirectory)
+            TerminalInitFunction content, TerminalInitScriptConfig config, WorkingDirectoryFunction workingDirectory)
             throws Exception;
 
     FilePath getSystemTemporaryDirectory();
diff --git a/core/src/main/java/io/xpipe/core/process/TerminalInitFunction.java b/core/src/main/java/io/xpipe/core/process/TerminalInitFunction.java
new file mode 100644
index 00000000..01afa6d5
--- /dev/null
+++ b/core/src/main/java/io/xpipe/core/process/TerminalInitFunction.java
@@ -0,0 +1,69 @@
+package io.xpipe.core.process;
+
+import io.xpipe.core.util.FailableFunction;
+
+public interface TerminalInitFunction {
+
+    static TerminalInitFunction of(FailableFunction<ShellControl, String, Exception> f) {
+        return new TerminalInitFunction() {
+            @Override
+            public boolean isFixed() {
+                return false;
+            }
+
+            @Override
+            public boolean isSpecified() {
+                return true;
+            }
+
+            @Override
+            public String apply(ShellControl shellControl) throws Exception {
+                return f.apply(shellControl);
+            }
+        };
+    }
+
+    static TerminalInitFunction fixed(String s) {
+        return new TerminalInitFunction() {
+            @Override
+            public boolean isFixed() {
+                return true;
+            }
+
+            @Override
+            public boolean isSpecified() {
+                return true;
+            }
+
+            @Override
+            public String apply(ShellControl shellControl) {
+                return s;
+            }
+        };
+    }
+
+    static TerminalInitFunction none() {
+        return new TerminalInitFunction() {
+            @Override
+            public boolean isFixed() {
+                return true;
+            }
+
+            @Override
+            public boolean isSpecified() {
+                return false;
+            }
+
+            @Override
+            public String apply(ShellControl shellControl) {
+                return null;
+            }
+        };
+    }
+
+    boolean isFixed();
+
+    boolean isSpecified();
+
+    String apply(ShellControl shellControl) throws Exception;
+}
diff --git a/core/src/main/java/io/xpipe/core/process/TerminalInitScriptConfig.java b/core/src/main/java/io/xpipe/core/process/TerminalInitScriptConfig.java
index 2c20987e..5e2fe983 100644
--- a/core/src/main/java/io/xpipe/core/process/TerminalInitScriptConfig.java
+++ b/core/src/main/java/io/xpipe/core/process/TerminalInitScriptConfig.java
@@ -7,7 +7,7 @@ public class TerminalInitScriptConfig {
 
     String displayName;
     boolean clearScreen;
-    String terminalSpecificCommands;
+    TerminalInitFunction terminalSpecificCommands;
 
     public static TerminalInitScriptConfig ofName(String name) {
         return new TerminalInitScriptConfig(name, true, null);