diff --git a/server/utils/openai.ts b/server/utils/openai.ts
index 03a3247..6c61ded 100644
--- a/server/utils/openai.ts
+++ b/server/utils/openai.ts
@@ -67,7 +67,10 @@ export interface LLMDecision {
 type ReadbackStatus = 'ok' | 'missing' | 'incorrect' | 'uncertain'
 
 const READBACK_REQUIREMENTS: Record<string, string[]> = {
-    CD_READBACK_CHECK: ['dest', 'sid', 'runway', 'initial_altitude_ft', 'squawk']
+    CD_READBACK_CHECK: ['dest', 'sid', 'runway', 'initial_altitude_ft', 'squawk'],
+    GRD_TAXI_READBACK_CHECK: ['runway', 'taxi_route', 'hold_short'],
+    TWR_TAKEOFF_READBACK_CHECK: ['runway', 'cleared_takeoff'],
+    GRD_TAXI_IN_READBACK_CHECK: ['gate', 'taxi_route']
 }
 
 const READBACK_JSON_SCHEMA = {
@@ -134,6 +137,19 @@ function buildSpokenVariants(key: string, value: string): string[] {
     variants.add(normalized)
     variants.add(normalized.toUpperCase())
 
+    if (key === 'hold_short') {
+        const base = normalized.replace(/^holding\s+short/i, 'hold short')
+        variants.add(base)
+        if (!/\brunway\b/i.test(base)) {
+            variants.add(base.replace(/^(hold short)/i, '$1 runway'))
+        }
+    }
+
+    if (key === 'cleared_takeoff') {
+        variants.add(normalized.replace(/take-off/gi, 'takeoff'))
+        variants.add(normalized.replace(/take-off/gi, 'take off'))
+    }
+
     if (/^[A-Z]{3,4}$/.test(normalized.toUpperCase())) {
         variants.add(toPhonetic(normalized))
     }
@@ -188,6 +204,42 @@ function fallbackNextState(input: LLMDecisionInput): string {
     return input.candidates[0]?.id || input.state_id || 'GEN_NO_REPLY'
 }
 
+function resolveReadbackValue(key: string, input: LLMDecisionInput): string | null {
+    const rawValue = input.variables?.[key]
+    if (rawValue !== undefined && rawValue !== null) {
+        const trimmed = `${rawValue}`.trim()
+        if (trimmed.length > 0) {
+            return trimmed
+        }
+    }
+
+    switch (key) {
+        case 'hold_short': {
+            const runway = input.variables?.runway
+            if (typeof runway === 'string' && runway.trim().length > 0) {
+                return `holding short ${runway}`.trim()
+            }
+            return 'holding short'
+        }
+        case 'cleared_takeoff': {
+            const runway = input.variables?.runway
+            if (typeof runway === 'string' && runway.trim().length > 0) {
+                return `cleared for take-off ${runway}`.trim()
+            }
+            return 'cleared for take-off'
+        }
+        case 'cleared_to_land': {
+            const runway = input.variables?.runway
+            if (typeof runway === 'string' && runway.trim().length > 0) {
+                return `cleared to land runway ${runway}`.trim()
+            }
+            return 'cleared to land'
+        }
+        default:
+            return null
+    }
+}
+
 // Extrahiere verwendete Variablen aus Templates
 function extractTemplateVariables(text?: string): string[] {
     if (!text) return []
@@ -283,14 +335,24 @@ export async function routeDecision(input: LLMDecisionInput): Promise<LLMDecisio
 
     async function handleReadbackCheck(): Promise<LLMDecision> {
         const requiredKeys = READBACK_REQUIREMENTS[input.state_id] || input.state.readback_required || []
-        const expectedItems = requiredKeys
-            .map(key => ({ key, value: input.variables?.[key] }))
-            .filter(item => item.value !== undefined && item.value !== null && `${item.value}`.trim().length > 0)
-            .map(item => ({
-                key: item.key,
-                value: String(item.value),
-                spoken_variants: buildSpokenVariants(item.key, String(item.value))
-            }))
+        const expectedItems = requiredKeys.reduce<Array<{ key: string; value: string; spoken_variants: string[] }>>((acc, key) => {
+            const value = resolveReadbackValue(key, input)
+            if (!value) {
+                return acc
+            }
+
+            const normalizedValue = String(value)
+            if (!normalizedValue.trim().length) {
+                return acc
+            }
+
+            acc.push({
+                key,
+                value: normalizedValue,
+                spoken_variants: buildSpokenVariants(key, normalizedValue)
+            })
+            return acc
+        }, [])
 
         const okNext = pickTransition(input.state.ok_next, input.candidates)
         const badNext = pickTransition(input.state.bad_next, input.candidates)
diff --git a/shared/data/atcDecisionTree.ts b/shared/data/atcDecisionTree.ts
index 4941556..38a3f9d 100644
--- a/shared/data/atcDecisionTree.ts
+++ b/shared/data/atcDecisionTree.ts
@@ -114,6 +114,7 @@ const atcDecisionTree = {
       "role": "atc",
       "phase": "Clearance",
       "auto": "check_readback",
+      "readback_required": ["dest","sid","runway","initial_altitude_ft","squawk"],
       "ok_next": [{"to": "CD_CLR_COMPLETE"}],
       "bad_next": [{"to": "CD_READBACK_CORRECT"}],
       "on_timeout": [{"after_s": 6, "action": "say", "say_tpl": "{callsign}, read back clearance."}]
@@ -179,7 +180,21 @@ const atcDecisionTree = {
       "role": "pilot",
       "phase": "TaxiOut",
       "utterance_tpl": "{callsign} taxi to {runway} via {taxi_route}, holding short {runway}.",
-      "next": [{"to": "TWR_CONTACT"}]
+      "next": [{"to": "GRD_TAXI_READBACK_CHECK"}]
+    },
+    "GRD_TAXI_READBACK_CHECK": {
+      "role": "atc",
+      "phase": "TaxiOut",
+      "auto": "check_readback",
+      "readback_required": ["runway","taxi_route","hold_short"],
+      "ok_next": [{"to": "TWR_CONTACT"}],
+      "bad_next": [{"to": "GRD_TAXI_READBACK_CORRECT"}]
+    },
+    "GRD_TAXI_READBACK_CORRECT": {
+      "role": "atc",
+      "phase": "TaxiOut",
+      "say_tpl": "{callsign}, negative; taxi to runway {runway} via {taxi_route}, hold short runway {runway}.",
+      "next": [{"to": "GRD_TAXI_READBACK"}]
     },
 
     "TWR_CONTACT": {
@@ -216,7 +231,21 @@ const atcDecisionTree = {
       "role": "pilot",
       "phase": "Departure",
       "utterance_tpl": "{callsign} cleared for take-off {runway}.",
-      "next": [{"to": "DEP_CONTACT"}]
+      "next": [{"to": "TWR_TAKEOFF_READBACK_CHECK"}]
+    },
+    "TWR_TAKEOFF_READBACK_CHECK": {
+      "role": "atc",
+      "phase": "Departure",
+      "auto": "check_readback",
+      "readback_required": ["runway","cleared_takeoff"],
+      "ok_next": [{"to": "DEP_CONTACT"}],
+      "bad_next": [{"to": "TWR_TAKEOFF_READBACK_CORRECT"}]
+    },
+    "TWR_TAKEOFF_READBACK_CORRECT": {
+      "role": "atc",
+      "phase": "Departure",
+      "say_tpl": "{callsign}, negative; runway {runway}, cleared for take-off.",
+      "next": [{"to": "TWR_TAKEOFF_READBACK"}]
     },
 
     "DEP_CONTACT": {
@@ -373,7 +402,21 @@ const atcDecisionTree = {
       "role": "pilot",
       "phase": "TaxiIn",
       "utterance_tpl": "{callsign} taxi to stand {gate} via {taxi_route}.",
-      "next": [{"to": "FLOW_COMPLETE"}]
+      "next": [{"to": "GRD_TAXI_IN_READBACK_CHECK"}]
+    },
+    "GRD_TAXI_IN_READBACK_CHECK": {
+      "role": "atc",
+      "phase": "TaxiIn",
+      "auto": "check_readback",
+      "readback_required": ["gate","taxi_route"],
+      "ok_next": [{"to": "FLOW_COMPLETE"}],
+      "bad_next": [{"to": "GRD_TAXI_IN_READBACK_CORRECT"}]
+    },
+    "GRD_TAXI_IN_READBACK_CORRECT": {
+      "role": "atc",
+      "phase": "TaxiIn",
+      "say_tpl": "{callsign}, negative; taxi to stand {gate} via {taxi_route}.",
+      "next": [{"to": "GRD_TAXI_IN_READBACK"}]
     },
     "FLOW_COMPLETE": {
       "role": "system",