diff --git a/BUILDER_APPS_MIGRATION.md b/BUILDER_APPS_MIGRATION.md
index 23465aeb..f2ba044d 100644
--- a/BUILDER_APPS_MIGRATION.md
+++ b/BUILDER_APPS_MIGRATION.md
@@ -51,15 +51,20 @@ Das Projekt nutzt ein geteiltes `helpers.py`, das auf der alten OpenAI Python Li
     openai==0.28.1
     # weitere deps...
 ### 1.5 Python Syntax & F-Strings
-Multi-Line f-Strings mit JSON-Beispielen (`{...}`) sind extrem fehleranfällig (Escaping, Einrückung).
-*   **Best Practice:** Komplexe JSON-Daten oder Strings **vorher** in Variablen speichern und dann einfügen.
+Multi-Line f-Strings sind in Docker-Umgebungen fehleranfällig.
+*   **Vermeide:** Ternary Operators (`... if x else ...`) innerhalb von Multi-Line f-Strings. Dies führt oft zu `SyntaxError: invalid decimal literal`.
+*   **Best Practice:** Nutze explizite `if/else` Blöcke zur Definition des Prompts.
+*   **Vermeide:** Verschachtelte JSON-Dumps (`{...}`) direkt im f-String. Nutze vorher definierte Variablen.
     ```python
     # Schlecht:
-    prompt = f"""Daten: {json.dumps(data.get('nested'))}"""
+    prompt = f"""Daten: {json.dumps(data)}""" if lang=='de' else f"""Data: ..."""
     
     # Gut:
-    nested_json = json.dumps(data.get('nested'))
-    prompt = f"""Daten: {nested_json}"""
+    json_data = json.dumps(data)
+    if lang == 'de':
+        prompt = f"""Daten: {json_data}"""
+    else:
+        prompt = f"""Data: {json_data}"""
     ```
 *   **Signaturen prüfen:** Shared Libraries (`helpers.py`) haben oft ältere Signaturen.
     *   Beispiel: `call_openai_chat` unterstützt oft kein `system_message` Argument. Stattdessen Prompt manuell zusammenbauen (`sys_instr + "\n\n" + prompt`).
diff --git a/gtm_architect_orchestrator.py b/gtm_architect_orchestrator.py
index b1fee724..9514e886 100644
--- a/gtm_architect_orchestrator.py
+++ b/gtm_architect_orchestrator.py
@@ -131,7 +131,8 @@ def analyze_product(data):
     lang = data.get('language', 'de')
     sys_instr = get_system_instruction(lang)
 
-    extraction_prompt = f"""
+    if lang == 'en':
+        extraction_prompt = f"""
 PHASE 1-A: TECHNICAL EXTRACTION
 Input Product Description: "{product_input[:25000]}..."
 
@@ -141,7 +142,9 @@ Task:
 3. Create a short raw analysis summary.
 
 Output JSON format ONLY.
-""" if lang == 'en' else f"""
+"""
+    else:
+        extraction_prompt = f"""
 PHASE 1-A: TECHNICAL EXTRACTION
 Input Product Description: "{product_input[:25000]}..."
 
@@ -152,15 +155,18 @@ Aufgabe:
 
 Output JSON format ONLY.
 """
+
     # Fix: Prepend system instruction manually
     full_extraction_prompt = sys_instr + "\n\n" + extraction_prompt
+    # Using response_format_json=True since helpers.py supports it (for logging/prompt hint)
     extraction_response = call_openai_chat(full_extraction_prompt, response_format_json=True)
     extraction_data = json.loads(extraction_response)
 
     features_json = json.dumps(extraction_data.get('features'))
     constraints_json = json.dumps(extraction_data.get('constraints'))
 
-    conflict_prompt = f"""
+    if lang == 'en':
+        conflict_prompt = f"""
 PHASE 1-B: PORTFOLIO CONFLICT CHECK
 
 New Product Features: {features_json}
@@ -174,7 +180,9 @@ Task:
 Check if the new product overlaps significantly with existing ones (is it just a clone?).
 
 Output JSON format ONLY.
-""" if lang == 'en' else f"""
+"""
+    else:
+        conflict_prompt = f"""
 PHASE 1-B: PORTFOLIO CONFLICT CHECK
 
 Neue Produkt-Features: {features_json}
@@ -189,6 +197,7 @@ Prüfe, ob das neue Produkt signifikant mit bestehenden Produkten überlappt (Is
 
 Output JSON format ONLY.
 """
+
     # Fix: Prepend system instruction manually
     full_conflict_prompt = sys_instr + "\n\n" + conflict_prompt
     conflict_response = call_openai_chat(full_conflict_prompt, response_format_json=True)
@@ -205,7 +214,8 @@ def discover_icps(data):
     features_json = json.dumps(phase1_result.get('features'))
     constraints_json = json.dumps(phase1_result.get('constraints'))
 
-    prompt = f"""
+    if lang == 'en':
+        prompt = f"""
 PHASE 2: ICP DISCOVERY & DATA PROXIES
 Based on the product features: {features_json}
 And constraints: {constraints_json}
@@ -215,7 +225,9 @@ Output JSON format ONLY:
   "icps": [ {{ "name": "Industry Name", "rationale": "Rationale" }} ],
   "dataProxies": [ {{ "target": "Criteria", "method": "How" }} ]
 }}
-""" if lang == 'en' else f"""
+"""
+    else:
+        prompt = f"""
 PHASE 2: ICP DISCOVERY & DATA PROXIES
 Basierend auf Features: {features_json}
 Und Constraints: {constraints_json}
@@ -226,6 +238,7 @@ Output JSON format ONLY:
   "dataProxies": [ {{ "target": "Kriterium", "method": "Methode" }} ]
 }}
 """
+
     # Fix: Prepend system instruction manually
     full_prompt = sys_instr + "\n\n" + prompt
     response = call_openai_chat(full_prompt, response_format_json=True)
@@ -283,11 +296,11 @@ def main():
         try:
             data = json.loads(sys.stdin.read())
         except:
-            data = {}
+            data = {{}}
     else:
-        data = {}
+        data = {{}}
 
-    modes = {
+    modes = {{
         "analyze_product": analyze_product,
         "discover_icps": discover_icps,
         "hunt_whales": hunt_whales,
@@ -306,4 +319,4 @@ def main():
         print(json.dumps({"error": f"Unknown mode: {args.mode}"}))
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()