diff --git a/Makefile b/Makefile
index c0ab83097..6e78199a5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,24 @@
 ROOT_DIR := $(shell pwd)
 BUILD_OUTPUT_DIR := $(ROOT_DIR)/src/Nethermind/src/Nethermind/artifacts/bin/Nethermind.Runner/debug
 
-.PHONY: run clean clean-monitoring clean-all clean-restart-monitoring stop clean-run run-sepolia run-sepolia-verify clean-run-sepolia clean-run-sepolia-verify build test format coverage coverage-staged coverage-report help
+# Default values (can be overridden)
+ARBOS_VERSION ?= 51
+ACCOUNTS_FILE ?= src/Nethermind.Arbitrum/Properties/accounts/defaults.json
+MAX_CODE_SIZE ?= 0x6000
+CONFIG_NAME := arbitrum-system-test
 
-all: run ## Default target
+# Generate config dynamically
+generate-system-test-config:
+	@./src/Nethermind.Arbitrum/Properties/scripts/generate-system-test-config.sh $(ARBOS_VERSION) $(ACCOUNTS_FILE) $(CONFIG_NAME) $(MAX_CODE_SIZE)
+
+# Run with custom parameters
+run-system-test: generate-system-test-config
+	@echo "Starting Nethermind with system-test config..."
+	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c $(CONFIG_NAME) --data-dir $(ROOT_DIR)/.data --log debug
+
+clean-run-system-test: clean generate-system-test-config
+	@echo "Clean start with system-test config..."
+	@$(MAKE) run-system-test
 
 run-local: ## Start Nethermind Arbitrum node without cleaning .data
 	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c arbitrum-local --data-dir $(ROOT_DIR)/.data
@@ -15,47 +30,6 @@ clean-run-local: ## Clean .data and start Nethermind Arbitrum node
 	@$(MAKE) clean
 	@$(MAKE) run-local
 
-run-system-test-arbos11: ## Start Nethermind Arbitrum node without cleaning .data
-	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c arbitrum-system-test-arbos11 --data-dir $(ROOT_DIR)/.data --log debug
-
-clean-run-system-test-arbos11: ## Clean .data and start Nethermind Arbitrum node
-	@$(MAKE) clean
-	@$(MAKE) run-system-test-arbos11
-
-run-system-test-arbos20: ## Start Nethermind Arbitrum node without cleaning .data
-	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c arbitrum-system-test-arbos20 --data-dir $(ROOT_DIR)/.data --log debug
-
-clean-run-system-test-arbos20: ## Clean .data and start Nethermind Arbitrum node
-	@$(MAKE) clean
-	@$(MAKE) run-system-test-arbos20
-
-run-system-test-arbos30: ## Start Nethermind Arbitrum node without cleaning .data
-	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c arbitrum-system-test-arbos30 --data-dir $(ROOT_DIR)/.data --log debug
-
-clean-run-system-test-arbos30: ## Clean .data and start Nethermind Arbitrum node
-	@$(MAKE) clean
-	@$(MAKE) run-system-test-arbos30
-
-run-system-test-arbos40: ## Start Nethermind Arbitrum node without cleaning .data
-	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c arbitrum-system-test-arbos40 --data-dir $(ROOT_DIR)/.data --log debug
-
-clean-run-system-test-arbos40: ## Clean .data and start Nethermind Arbitrum node
-	@$(MAKE) clean
-	@$(MAKE) run-system-test-arbos40
-
-run-system-test-arbos50: ## Start Nethermind Arbitrum node without cleaning .data
-	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c arbitrum-system-test-arbos50 --data-dir $(ROOT_DIR)/.data --log debug
-
-clean-run-system-test-arbos50: ## Clean .data and start Nethermind Arbitrum node
-	@$(MAKE) clean
-	@$(MAKE) run-system-test-arbos50
-
-run-system-test-arbos51: ## Start Nethermind Arbitrum node without cleaning .data
-	cd $(BUILD_OUTPUT_DIR) && dotnet nethermind.dll -c arbitrum-system-test-arbos51 --data-dir $(ROOT_DIR)/.data --log debug
-
-clean-run-system-test-arbos51: ## Clean .data and start Nethermind Arbitrum node
-	@$(MAKE) clean
-	@$(MAKE) run-system-test-arbos51
 
 run-sepolia: ## Start Nethermind Arbitrum node (Sepolia) without cleaning .data
 	@echo "Starting Nethermind Arbitrum node (Sepolia) with metrics..."
@@ -96,6 +70,7 @@ clean-run-sepolia-monitoring: ## Clean .data, start monitoring and Nethermind Ar
 clean: ## Remove .data directory
 	@echo "Cleaning .data directory..."
 	@rm -rf $(ROOT_DIR)/.data
+	@rm -f $(ROOT_DIR)/.generated-chainspec.json
 
 clean-monitoring: ## Clean monitoring data (Prometheus metrics)
 	@echo "Cleaning monitoring data..."
@@ -177,3 +152,29 @@ format: ## Format code using dotnet format
 help: ## Show this help message
 	@echo "Available targets:"
 	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "  %-15s %s\n", $$1, $$2}' $(MAKEFILE_LIST) | sort
+
+list-system-test-accounts: ## List available account configurations for System Tests
+	@echo "Available account configurations:"
+	@ls -1 src/Nethermind.Arbitrum/Properties/accounts/*.json 2>/dev/null || echo "  No accounts files found"
+
+list-system-test-configs: ## Example configurations for System Tests
+	@echo "Example usage:"
+	@echo ""
+	@echo "1. Run with default settings (ArbOS 40, default accounts):"
+	@echo "   make run-system-test"
+	@echo ""
+	@echo "2. Run with specific ArbOS version:"
+	@echo "   make run-system-test ARBOS_VERSION=50"
+	@echo ""
+	@echo "3. Run with specific accounts:"
+	@echo "   make run-system-test ACCOUNTS_FILE=src/Nethermind.Arbitrum/Properties/accounts/contract-tx.json"
+	@echo ""
+	@echo "4. Run with custom max code size (default is 0x6000 = 24KB):"
+	@echo "   make run-system-test MAX_CODE_SIZE=0xC000"
+	@echo ""
+	@echo "5. Combine all parameters:"
+	@echo "   make run-system-test ARBOS_VERSION=51 ACCOUNTS_FILE=src/Nethermind.Arbitrum/Properties/accounts/contract-tx.json MAX_CODE_SIZE=0xC000"
+	@echo ""
+	@echo "6. Clean run with custom settings:"
+	@echo "   make clean-run-system-test ARBOS_VERSION=30 ACCOUNTS_FILE=src/Nethermind.Arbitrum/Properties/accounts/contract-tx.json"
+	@echo ""
diff --git a/src/Nethermind.Arbitrum/Properties/accounts/contract-tx.json b/src/Nethermind.Arbitrum/Properties/accounts/contract-tx.json
new file mode 100644
index 000000000..b1caa9ca9
--- /dev/null
+++ b/src/Nethermind.Arbitrum/Properties/accounts/contract-tx.json
@@ -0,0 +1,11 @@
+{
+  "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
+    "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
+  },
+  "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
+    "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
+  },
+  "0000000000000000000000000000123412341234": {
+    "balance": "0xDE0B6B3A7640000"
+  }
+}
diff --git a/src/Nethermind.Arbitrum/Properties/accounts/defaults.json b/src/Nethermind.Arbitrum/Properties/accounts/defaults.json
new file mode 100644
index 000000000..766936e51
--- /dev/null
+++ b/src/Nethermind.Arbitrum/Properties/accounts/defaults.json
@@ -0,0 +1,8 @@
+{
+  "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
+    "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
+  },
+  "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
+    "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
+  }
+}
diff --git a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos20.json b/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos20.json
deleted file mode 100644
index a3e4fef06..000000000
--- a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos20.json
+++ /dev/null
@@ -1,95 +0,0 @@
-{
-  "name": "Arbitrum System Test Chain",
-  "dataDir": "arbitrum-system-test",
-  "engine": {
-    "Arbitrum": {
-      "initialArbOSVersion": 20,
-      "initialChainOwner": "0x0000000000000000000000000000000000000000",
-      "genesisBlockNum": 0,
-      "enableArbOS": true,
-      "allowDebugPrecompiles": true,
-      "dataAvailabilityCommittee": false
-    }
-  },
-  "params": {
-    "gasLimitBoundDivisor": "0x400",
-    "accountStartNonce": "0x0",
-    "maximumExtraDataSize": "0x20",
-    "minGasLimit": "0x1388",
-    "networkID": "0x64aba",
-    "forkBlock": "0x0",
-    "maxCodeSize": "0x6000",
-    "maxCodeSizeTransition": "0x0",
-    "eip150Transition": "0x0",
-    "eip160Transition": "0x0",
-    "eip161abcTransition": "0x0",
-    "eip161dTransition": "0x0",
-    "eip155Transition": "0x0",
-    "eip140Transition": "0x0",
-    "eip211Transition": "0x0",
-    "eip214Transition": "0x0",
-    "eip658Transition": "0x0",
-    "eip145Transition": "0x0",
-    "eip1014Transition": "0x0",
-    "eip1052Transition": "0x0",
-    "eip1283Transition": "0x0",
-    "eip1283DisableTransition": "0x0",
-    "eip152Transition": "0x0",
-    "eip1108Transition": "0x0",
-    "eip1344Transition": "0x0",
-    "eip1884Transition": "0x0",
-    "eip2028Transition": "0x0",
-    "eip2200Transition": "0x0",
-    "eip2565Transition": "0x0",
-    "eip2929Transition": "0x0",
-    "eip2930Transition": "0x0",
-    "eip1559Transition": "0x0",
-    "eip3198Transition": "0x0",
-    "eip3529Transition": "0x0",
-    "eip3541Transition": "0x0",
-    "terminalTotalDifficulty": "3C6568F12E8000",
-    "mergeForkIdTransition": "0x0",
-    "beaconChainGenesisTimestamp": "0x62b07d60",
-    "eip3855TransitionTimestamp": "0x63FD7D60",
-    "eip3651TransitionTimestamp": "0x63FD7D60",
-    "eip3860TransitionTimestamp": "0x63FD7D60",
-    "eip1153TransitionTimestamp": "0x65B97D60",
-    "eip4788TransitionTimestamp": "0x65B97D60",
-    "eip5656TransitionTimestamp": "0x65B97D60",
-    "eip6780TransitionTimestamp": "0x65B97D60",
-    "eip2537TransitionTimestamp": "0x67C7FD60",
-    "eip2935TransitionTimestamp": "0x67C7FD60",
-    "eip2935RingBufferSize": "0x5FFD0",
-    "eip7702TransitionTimestamp": "0x67C7FD60",
-    "minHistoryRetentionEpochs": "0x0",
-    "eip7934MaxRlpBlockSize": "0x0"
-  },
-  "genesis": {
-    "seal": {
-      "ethereum": {
-        "nonce": "0x1",
-        "mixHash": "0x0000000000000000000000000000000000000000000000140000000000000000"
-      }
-    },
-    "number": "0x0",
-    "difficulty": "0x1",
-    "author": "0x0000000000000000000000000000000000000000",
-    "timestamp": "0x0",
-    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "gasLimit": "0x4000000000000",
-    "baseFeePerGas": "0x5f5e100"
-  },
-  "nodes": [],
-  "accounts": {
-    "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "0000000000000000000000000000123412341234": {
-      "balance": "0xDE0B6B3A7640000"
-    }
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos30.json b/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos30.json
deleted file mode 100644
index 351496b6f..000000000
--- a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos30.json
+++ /dev/null
@@ -1,95 +0,0 @@
-{
-  "name": "Arbitrum System Test Chain",
-  "dataDir": "arbitrum-system-test",
-  "engine": {
-    "Arbitrum": {
-      "initialArbOSVersion": 30,
-      "initialChainOwner": "0x0000000000000000000000000000000000000000",
-      "genesisBlockNum": 0,
-      "enableArbOS": true,
-      "allowDebugPrecompiles": true,
-      "dataAvailabilityCommittee": false
-    }
-  },
-  "params": {
-    "gasLimitBoundDivisor": "0x400",
-    "accountStartNonce": "0x0",
-    "maximumExtraDataSize": "0x20",
-    "minGasLimit": "0x1388",
-    "networkID": "0x64aba",
-    "forkBlock": "0x0",
-    "maxCodeSize": "0x6000",
-    "maxCodeSizeTransition": "0x0",
-    "eip150Transition": "0x0",
-    "eip160Transition": "0x0",
-    "eip161abcTransition": "0x0",
-    "eip161dTransition": "0x0",
-    "eip155Transition": "0x0",
-    "eip140Transition": "0x0",
-    "eip211Transition": "0x0",
-    "eip214Transition": "0x0",
-    "eip658Transition": "0x0",
-    "eip145Transition": "0x0",
-    "eip1014Transition": "0x0",
-    "eip1052Transition": "0x0",
-    "eip1283Transition": "0x0",
-    "eip1283DisableTransition": "0x0",
-    "eip152Transition": "0x0",
-    "eip1108Transition": "0x0",
-    "eip1344Transition": "0x0",
-    "eip1884Transition": "0x0",
-    "eip2028Transition": "0x0",
-    "eip2200Transition": "0x0",
-    "eip2565Transition": "0x0",
-    "eip2929Transition": "0x0",
-    "eip2930Transition": "0x0",
-    "eip1559Transition": "0x0",
-    "eip3198Transition": "0x0",
-    "eip3529Transition": "0x0",
-    "eip3541Transition": "0x0",
-    "terminalTotalDifficulty": "3C6568F12E8000",
-    "mergeForkIdTransition": "0x0",
-    "beaconChainGenesisTimestamp": "0x62b07d60",
-    "eip3855TransitionTimestamp": "0x63FD7D60",
-    "eip3651TransitionTimestamp": "0x63FD7D60",
-    "eip3860TransitionTimestamp": "0x63FD7D60",
-    "eip1153TransitionTimestamp": "0x65B97D60",
-    "eip4788TransitionTimestamp": "0x65B97D60",
-    "eip5656TransitionTimestamp": "0x65B97D60",
-    "eip6780TransitionTimestamp": "0x65B97D60",
-    "eip2537TransitionTimestamp": "0x67C7FD60",
-    "eip2935TransitionTimestamp": "0x67C7FD60",
-    "eip2935RingBufferSize": "0x5FFD0",
-    "eip7702TransitionTimestamp": "0x67C7FD60",
-    "minHistoryRetentionEpochs": "0x0",
-    "eip7934MaxRlpBlockSize": "0x0"
-  },
-  "genesis": {
-    "seal": {
-      "ethereum": {
-        "nonce": "0x1",
-        "mixHash": "0x00000000000000000000000000000000000000000000001E0000000000000000"
-      }
-    },
-    "number": "0x0",
-    "difficulty": "0x1",
-    "author": "0x0000000000000000000000000000000000000000",
-    "timestamp": "0x0",
-    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "gasLimit": "0x4000000000000",
-    "baseFeePerGas": "0x5f5e100"
-  },
-  "nodes": [],
-  "accounts": {
-    "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "0000000000000000000000000000123412341234": {
-      "balance": "0xDE0B6B3A7640000"
-    }
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos40.json b/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos40.json
deleted file mode 100644
index 6ccff30b1..000000000
--- a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos40.json
+++ /dev/null
@@ -1,95 +0,0 @@
-{
-  "name": "Arbitrum System Test Chain",
-  "dataDir": "arbitrum-system-test",
-  "engine": {
-    "Arbitrum": {
-      "initialArbOSVersion": 40,
-      "initialChainOwner": "0x0000000000000000000000000000000000000000",
-      "genesisBlockNum": 0,
-      "enableArbOS": true,
-      "allowDebugPrecompiles": true,
-      "dataAvailabilityCommittee": false
-    }
-  },
-  "params": {
-    "gasLimitBoundDivisor": "0x400",
-    "accountStartNonce": "0x0",
-    "maximumExtraDataSize": "0x20",
-    "minGasLimit": "0x1388",
-    "networkID": "0x64aba",
-    "forkBlock": "0x0",
-    "maxCodeSize": "0x6000",
-    "maxCodeSizeTransition": "0x0",
-    "eip150Transition": "0x0",
-    "eip160Transition": "0x0",
-    "eip161abcTransition": "0x0",
-    "eip161dTransition": "0x0",
-    "eip155Transition": "0x0",
-    "eip140Transition": "0x0",
-    "eip211Transition": "0x0",
-    "eip214Transition": "0x0",
-    "eip658Transition": "0x0",
-    "eip145Transition": "0x0",
-    "eip1014Transition": "0x0",
-    "eip1052Transition": "0x0",
-    "eip1283Transition": "0x0",
-    "eip1283DisableTransition": "0x0",
-    "eip152Transition": "0x0",
-    "eip1108Transition": "0x0",
-    "eip1344Transition": "0x0",
-    "eip1884Transition": "0x0",
-    "eip2028Transition": "0x0",
-    "eip2200Transition": "0x0",
-    "eip2565Transition": "0x0",
-    "eip2929Transition": "0x0",
-    "eip2930Transition": "0x0",
-    "eip1559Transition": "0x0",
-    "eip3198Transition": "0x0",
-    "eip3529Transition": "0x0",
-    "eip3541Transition": "0x0",
-    "terminalTotalDifficulty": "3C6568F12E8000",
-    "mergeForkIdTransition": "0x0",
-    "beaconChainGenesisTimestamp": "0x62b07d60",
-    "eip3855TransitionTimestamp": "0x63FD7D60",
-    "eip3651TransitionTimestamp": "0x63FD7D60",
-    "eip3860TransitionTimestamp": "0x63FD7D60",
-    "eip1153TransitionTimestamp": "0x65B97D60",
-    "eip4788TransitionTimestamp": "0x65B97D60",
-    "eip5656TransitionTimestamp": "0x65B97D60",
-    "eip6780TransitionTimestamp": "0x65B97D60",
-    "eip2537TransitionTimestamp": "0x67C7FD60",
-    "eip2935TransitionTimestamp": "0x67C7FD60",
-    "eip2935RingBufferSize": "0x5FFD0",
-    "eip7702TransitionTimestamp": "0x67C7FD60",
-    "minHistoryRetentionEpochs": "0x0",
-    "eip7934MaxRlpBlockSize": "0x0"
-  },
-  "genesis": {
-    "seal": {
-      "ethereum": {
-        "nonce": "0x1",
-        "mixHash": "0x0000000000000000000000000000000000000000000000280000000000000000"
-      }
-    },
-    "number": "0x0",
-    "difficulty": "0x1",
-    "author": "0x0000000000000000000000000000000000000000",
-    "timestamp": "0x0",
-    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "gasLimit": "0x4000000000000",
-    "baseFeePerGas": "0x5f5e100"
-  },
-  "nodes": [],
-  "accounts": {
-    "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "0000000000000000000000000000123412341234": {
-      "balance": "0xDE0B6B3A7640000"
-    }
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos50.json b/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos50.json
deleted file mode 100644
index d727af50a..000000000
--- a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos50.json
+++ /dev/null
@@ -1,95 +0,0 @@
-{
-  "name": "Arbitrum System Test Chain",
-  "dataDir": "arbitrum-system-test",
-  "engine": {
-    "Arbitrum": {
-      "initialArbOSVersion": 50,
-      "initialChainOwner": "0x0000000000000000000000000000000000000000",
-      "genesisBlockNum": 0,
-      "enableArbOS": true,
-      "allowDebugPrecompiles": true,
-      "dataAvailabilityCommittee": false
-    }
-  },
-  "params": {
-    "gasLimitBoundDivisor": "0x400",
-    "accountStartNonce": "0x0",
-    "maximumExtraDataSize": "0x20",
-    "minGasLimit": "0x1388",
-    "networkID": "0x64aba",
-    "forkBlock": "0x0",
-    "maxCodeSize": "0x6000",
-    "maxCodeSizeTransition": "0x0",
-    "eip150Transition": "0x0",
-    "eip160Transition": "0x0",
-    "eip161abcTransition": "0x0",
-    "eip161dTransition": "0x0",
-    "eip155Transition": "0x0",
-    "eip140Transition": "0x0",
-    "eip211Transition": "0x0",
-    "eip214Transition": "0x0",
-    "eip658Transition": "0x0",
-    "eip145Transition": "0x0",
-    "eip1014Transition": "0x0",
-    "eip1052Transition": "0x0",
-    "eip1283Transition": "0x0",
-    "eip1283DisableTransition": "0x0",
-    "eip152Transition": "0x0",
-    "eip1108Transition": "0x0",
-    "eip1344Transition": "0x0",
-    "eip1884Transition": "0x0",
-    "eip2028Transition": "0x0",
-    "eip2200Transition": "0x0",
-    "eip2565Transition": "0x0",
-    "eip2929Transition": "0x0",
-    "eip2930Transition": "0x0",
-    "eip1559Transition": "0x0",
-    "eip3198Transition": "0x0",
-    "eip3529Transition": "0x0",
-    "eip3541Transition": "0x0",
-    "terminalTotalDifficulty": "3C6568F12E8000",
-    "mergeForkIdTransition": "0x0",
-    "beaconChainGenesisTimestamp": "0x62b07d60",
-    "eip3855TransitionTimestamp": "0x63FD7D60",
-    "eip3651TransitionTimestamp": "0x63FD7D60",
-    "eip3860TransitionTimestamp": "0x63FD7D60",
-    "eip1153TransitionTimestamp": "0x65B97D60",
-    "eip4788TransitionTimestamp": "0x65B97D60",
-    "eip5656TransitionTimestamp": "0x65B97D60",
-    "eip6780TransitionTimestamp": "0x65B97D60",
-    "eip2537TransitionTimestamp": "0x67C7FD60",
-    "eip2935TransitionTimestamp": "0x67C7FD60",
-    "eip2935RingBufferSize": "0x5FFD0",
-    "eip7702TransitionTimestamp": "0x67C7FD60",
-    "minHistoryRetentionEpochs": "0x0",
-    "eip7934MaxRlpBlockSize": "0x0"
-  },
-  "genesis": {
-    "seal": {
-      "ethereum": {
-        "nonce": "0x1",
-        "mixHash": "0x0000000000000000000000000000000000000000000000320000000000000000"
-      }
-    },
-    "number": "0x0",
-    "difficulty": "0x1",
-    "author": "0x0000000000000000000000000000000000000000",
-    "timestamp": "0x0",
-    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "gasLimit": "0x4000000000000",
-    "baseFeePerGas": "0x5f5e100"
-  },
-  "nodes": [],
-  "accounts": {
-    "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "0000000000000000000000000000123412341234": {
-      "balance": "0xDE0B6B3A7640000"
-    }
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos51.json b/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos51.json
deleted file mode 100644
index 12cccf6fc..000000000
--- a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos51.json
+++ /dev/null
@@ -1,95 +0,0 @@
-{
-  "name": "Arbitrum System Test Chain",
-  "dataDir": "arbitrum-system-test",
-  "engine": {
-    "Arbitrum": {
-      "initialArbOSVersion": 51,
-      "initialChainOwner": "0x0000000000000000000000000000000000000000",
-      "genesisBlockNum": 0,
-      "enableArbOS": true,
-      "allowDebugPrecompiles": true,
-      "dataAvailabilityCommittee": false
-    }
-  },
-  "params": {
-    "gasLimitBoundDivisor": "0x400",
-    "accountStartNonce": "0x0",
-    "maximumExtraDataSize": "0x20",
-    "minGasLimit": "0x1388",
-    "networkID": "0x64aba",
-    "forkBlock": "0x0",
-    "maxCodeSize": "0x6000",
-    "maxCodeSizeTransition": "0x0",
-    "eip150Transition": "0x0",
-    "eip160Transition": "0x0",
-    "eip161abcTransition": "0x0",
-    "eip161dTransition": "0x0",
-    "eip155Transition": "0x0",
-    "eip140Transition": "0x0",
-    "eip211Transition": "0x0",
-    "eip214Transition": "0x0",
-    "eip658Transition": "0x0",
-    "eip145Transition": "0x0",
-    "eip1014Transition": "0x0",
-    "eip1052Transition": "0x0",
-    "eip1283Transition": "0x0",
-    "eip1283DisableTransition": "0x0",
-    "eip152Transition": "0x0",
-    "eip1108Transition": "0x0",
-    "eip1344Transition": "0x0",
-    "eip1884Transition": "0x0",
-    "eip2028Transition": "0x0",
-    "eip2200Transition": "0x0",
-    "eip2565Transition": "0x0",
-    "eip2929Transition": "0x0",
-    "eip2930Transition": "0x0",
-    "eip1559Transition": "0x0",
-    "eip3198Transition": "0x0",
-    "eip3529Transition": "0x0",
-    "eip3541Transition": "0x0",
-    "terminalTotalDifficulty": "3C6568F12E8000",
-    "mergeForkIdTransition": "0x0",
-    "beaconChainGenesisTimestamp": "0x62b07d60",
-    "eip3855TransitionTimestamp": "0x63FD7D60",
-    "eip3651TransitionTimestamp": "0x63FD7D60",
-    "eip3860TransitionTimestamp": "0x63FD7D60",
-    "eip1153TransitionTimestamp": "0x65B97D60",
-    "eip4788TransitionTimestamp": "0x65B97D60",
-    "eip5656TransitionTimestamp": "0x65B97D60",
-    "eip6780TransitionTimestamp": "0x65B97D60",
-    "eip2537TransitionTimestamp": "0x67C7FD60",
-    "eip2935TransitionTimestamp": "0x67C7FD60",
-    "eip2935RingBufferSize": "0x5FFD0",
-    "eip7702TransitionTimestamp": "0x67C7FD60",
-    "minHistoryRetentionEpochs": "0x0",
-    "eip7934MaxRlpBlockSize": "0x0"
-  },
-  "genesis": {
-    "seal": {
-      "ethereum": {
-        "nonce": "0x1",
-        "mixHash": "0x0000000000000000000000000000000000000000000000330000000000000000"
-      }
-    },
-    "number": "0x0",
-    "difficulty": "0x1",
-    "author": "0x0000000000000000000000000000000000000000",
-    "timestamp": "0x0",
-    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
-    "gasLimit": "0x4000000000000",
-    "baseFeePerGas": "0x5f5e100"
-  },
-  "nodes": [],
-  "accounts": {
-    "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "0000000000000000000000000000123412341234": {
-      "balance": "0xDE0B6B3A7640000"
-    }
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos11.json b/src/Nethermind.Arbitrum/Properties/chainspec/system-test-chainspec.template
similarity index 82%
rename from src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos11.json
rename to src/Nethermind.Arbitrum/Properties/chainspec/system-test-chainspec.template
index 1cf480a83..a79735137 100644
--- a/src/Nethermind.Arbitrum/Properties/chainspec/arbitrum-system-test-arbos11.json
+++ b/src/Nethermind.Arbitrum/Properties/chainspec/system-test-chainspec.template
@@ -3,7 +3,7 @@
   "dataDir": "arbitrum-system-test",
   "engine": {
     "Arbitrum": {
-      "initialArbOSVersion": 11,
+      "initialArbOSVersion": {{ARBOS_VERSION}},
       "initialChainOwner": "0x0000000000000000000000000000000000000000",
       "genesisBlockNum": 0,
       "enableArbOS": true,
@@ -18,7 +18,7 @@
     "minGasLimit": "0x1388",
     "networkID": "0x64aba",
     "forkBlock": "0x0",
-    "maxCodeSize": "0x6000",
+    "maxCodeSize": "{{MAX_CODE_SIZE}}",
     "maxCodeSizeTransition": "0x0",
     "eip150Transition": "0x0",
     "eip160Transition": "0x0",
@@ -68,7 +68,7 @@
     "seal": {
       "ethereum": {
         "nonce": "0x1",
-        "mixHash": "0x00000000000000000000000000000000000000000000000B0000000000000000"
+        "mixHash": "{{MIX_HASH}}"
       }
     },
     "number": "0x0",
@@ -81,15 +81,5 @@
     "baseFeePerGas": "0x5f5e100"
   },
   "nodes": [],
-  "accounts": {
-    "26E554a8acF9003b83495c7f45F06edCB803d4e3": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "aF24Ca6c2831f4d4F629418b50C227DF0885613A": {
-      "balance": "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7"
-    },
-    "0000000000000000000000000000123412341234": {
-      "balance": "0xDE0B6B3A7640000"
-    }
-  }
+  "accounts": {{ACCOUNTS}}
 }
diff --git a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos11.json b/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos11.json
deleted file mode 100644
index 06c3ab0ac..000000000
--- a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos11.json
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "$schema": "https://raw.githubusercontent.com/NethermindEth/core-scripts/refs/heads/main/schemas/config.json",
-  "Init": {
-    "ChainSpecPath": "chainspec/arbitrum-system-test-arbos11.json",
-    "BaseDbPath": "nethermind_db/arbitrum-system-test",
-    "LogFileName": "arbitrum-system-test.log"
-  },
-  "TxPool": {
-    "BlobsSupport": "Disabled"
-  },
-  "Sync": {
-    "NetworkingEnabled": false,
-    "FastSync": false,
-    "SnapSync": false,
-    "FastSyncCatchUpHeightDelta": "10000000000"
-  },
-  "Discovery": {
-    "DiscoveryVersion": "V5"
-  },
-  "JsonRpc": {
-    "Enabled": true,
-    "Port": 20545,
-    "EnginePort": 20551,
-    "UnsecureDevNoRpcAuthentication": true,
-    "AdditionalRpcUrls": [
-      "http://localhost:28551|http;ws|net;eth;subscribe;web3;client;debug"
-    ],
-    "EnabledModules": [
-      "Admin",
-      "Clique",
-      "Consensus",
-      "Db",
-      "Debug",
-      "Deposit",
-      "Erc20",
-      "Eth",
-      "Evm",
-      "Net",
-      "Nft",
-      "Parity",
-      "Personal",
-      "Proof",
-      "Subscribe",
-      "Trace",
-      "TxPool",
-      "Vault",
-      "Web3",
-      "Arbitrum"
-    ]
-  },
-  "Pruning": {
-    "PruningBoundary": 192
-  },
-  "Blocks": {
-    "SecondsPerSlot": 2
-  },
-  "Merge": {
-    "Enabled": true
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos20.json b/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos20.json
deleted file mode 100644
index fe68ed4f5..000000000
--- a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos20.json
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "$schema": "https://raw.githubusercontent.com/NethermindEth/core-scripts/refs/heads/main/schemas/config.json",
-  "Init": {
-    "ChainSpecPath": "chainspec/arbitrum-system-test-arbos20.json",
-    "BaseDbPath": "nethermind_db/arbitrum-system-test",
-    "LogFileName": "arbitrum-system-test.log"
-  },
-  "TxPool": {
-    "BlobsSupport": "Disabled"
-  },
-  "Sync": {
-    "NetworkingEnabled": false,
-    "FastSync": false,
-    "SnapSync": false,
-    "FastSyncCatchUpHeightDelta": "10000000000"
-  },
-  "Discovery": {
-    "DiscoveryVersion": "V5"
-  },
-  "JsonRpc": {
-    "Enabled": true,
-    "Port": 20545,
-    "EnginePort": 20551,
-    "UnsecureDevNoRpcAuthentication": true,
-    "AdditionalRpcUrls": [
-      "http://localhost:28551|http;ws|net;eth;subscribe;web3;client;debug"
-    ],
-    "EnabledModules": [
-      "Admin",
-      "Clique",
-      "Consensus",
-      "Db",
-      "Debug",
-      "Deposit",
-      "Erc20",
-      "Eth",
-      "Evm",
-      "Net",
-      "Nft",
-      "Parity",
-      "Personal",
-      "Proof",
-      "Subscribe",
-      "Trace",
-      "TxPool",
-      "Vault",
-      "Web3",
-      "Arbitrum"
-    ]
-  },
-  "Pruning": {
-    "PruningBoundary": 192
-  },
-  "Blocks": {
-    "SecondsPerSlot": 2
-  },
-  "Merge": {
-    "Enabled": true
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos30.json b/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos30.json
deleted file mode 100644
index f16b1b695..000000000
--- a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos30.json
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "$schema": "https://raw.githubusercontent.com/NethermindEth/core-scripts/refs/heads/main/schemas/config.json",
-  "Init": {
-    "ChainSpecPath": "chainspec/arbitrum-system-test-arbos30.json",
-    "BaseDbPath": "nethermind_db/arbitrum-system-test",
-    "LogFileName": "arbitrum-system-test.log"
-  },
-  "TxPool": {
-    "BlobsSupport": "Disabled"
-  },
-  "Sync": {
-    "NetworkingEnabled": false,
-    "FastSync": false,
-    "SnapSync": false,
-    "FastSyncCatchUpHeightDelta": "10000000000"
-  },
-  "Discovery": {
-    "DiscoveryVersion": "V5"
-  },
-  "JsonRpc": {
-    "Enabled": true,
-    "Port": 20545,
-    "EnginePort": 20551,
-    "UnsecureDevNoRpcAuthentication": true,
-    "AdditionalRpcUrls": [
-      "http://localhost:28551|http;ws|net;eth;subscribe;web3;client;debug"
-    ],
-    "EnabledModules": [
-      "Admin",
-      "Clique",
-      "Consensus",
-      "Db",
-      "Debug",
-      "Deposit",
-      "Erc20",
-      "Eth",
-      "Evm",
-      "Net",
-      "Nft",
-      "Parity",
-      "Personal",
-      "Proof",
-      "Subscribe",
-      "Trace",
-      "TxPool",
-      "Vault",
-      "Web3",
-      "Arbitrum"
-    ]
-  },
-  "Pruning": {
-    "PruningBoundary": 192
-  },
-  "Blocks": {
-    "SecondsPerSlot": 2
-  },
-  "Merge": {
-    "Enabled": true
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos40.json b/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos40.json
deleted file mode 100644
index 9ad3bf4c9..000000000
--- a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos40.json
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "$schema": "https://raw.githubusercontent.com/NethermindEth/core-scripts/refs/heads/main/schemas/config.json",
-  "Init": {
-    "ChainSpecPath": "chainspec/arbitrum-system-test-arbos40.json",
-    "BaseDbPath": "nethermind_db/arbitrum-system-test",
-    "LogFileName": "arbitrum-system-test.log"
-  },
-  "TxPool": {
-    "BlobsSupport": "Disabled"
-  },
-  "Sync": {
-    "NetworkingEnabled": false,
-    "FastSync": false,
-    "SnapSync": false,
-    "FastSyncCatchUpHeightDelta": "10000000000"
-  },
-  "Discovery": {
-    "DiscoveryVersion": "V5"
-  },
-  "JsonRpc": {
-    "Enabled": true,
-    "Port": 20545,
-    "EnginePort": 20551,
-    "UnsecureDevNoRpcAuthentication": true,
-    "AdditionalRpcUrls": [
-      "http://localhost:28551|http;ws|net;eth;subscribe;web3;client;debug"
-    ],
-    "EnabledModules": [
-      "Admin",
-      "Clique",
-      "Consensus",
-      "Db",
-      "Debug",
-      "Deposit",
-      "Erc20",
-      "Eth",
-      "Evm",
-      "Net",
-      "Nft",
-      "Parity",
-      "Personal",
-      "Proof",
-      "Subscribe",
-      "Trace",
-      "TxPool",
-      "Vault",
-      "Web3",
-      "Arbitrum"
-    ]
-  },
-  "Pruning": {
-    "PruningBoundary": 192
-  },
-  "Blocks": {
-    "SecondsPerSlot": 2
-  },
-  "Merge": {
-    "Enabled": true
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos50.json b/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos50.json
deleted file mode 100644
index 05a7bc4cf..000000000
--- a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos50.json
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "$schema": "https://raw.githubusercontent.com/NethermindEth/core-scripts/refs/heads/main/schemas/config.json",
-  "Init": {
-    "ChainSpecPath": "chainspec/arbitrum-system-test-arbos50.json",
-    "BaseDbPath": "nethermind_db/arbitrum-system-test",
-    "LogFileName": "arbitrum-system-test.log"
-  },
-  "TxPool": {
-    "BlobsSupport": "Disabled"
-  },
-  "Sync": {
-    "NetworkingEnabled": false,
-    "FastSync": false,
-    "SnapSync": false,
-    "FastSyncCatchUpHeightDelta": "10000000000"
-  },
-  "Discovery": {
-    "DiscoveryVersion": "V5"
-  },
-  "JsonRpc": {
-    "Enabled": true,
-    "Port": 20545,
-    "EnginePort": 20551,
-    "UnsecureDevNoRpcAuthentication": true,
-    "AdditionalRpcUrls": [
-      "http://localhost:28551|http;ws|net;eth;subscribe;web3;client;debug"
-    ],
-    "EnabledModules": [
-      "Admin",
-      "Clique",
-      "Consensus",
-      "Db",
-      "Debug",
-      "Deposit",
-      "Erc20",
-      "Eth",
-      "Evm",
-      "Net",
-      "Nft",
-      "Parity",
-      "Personal",
-      "Proof",
-      "Subscribe",
-      "Trace",
-      "TxPool",
-      "Vault",
-      "Web3",
-      "Arbitrum"
-    ]
-  },
-  "Pruning": {
-    "PruningBoundary": 192
-  },
-  "Blocks": {
-    "SecondsPerSlot": 2
-  },
-  "Merge": {
-    "Enabled": true
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos51.json b/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos51.json
deleted file mode 100644
index d483789d4..000000000
--- a/src/Nethermind.Arbitrum/Properties/configs/arbitrum-system-test-arbos51.json
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "$schema": "https://raw.githubusercontent.com/NethermindEth/core-scripts/refs/heads/main/schemas/config.json",
-  "Init": {
-    "ChainSpecPath": "chainspec/arbitrum-system-test-arbos51.json",
-    "BaseDbPath": "nethermind_db/arbitrum-system-test",
-    "LogFileName": "arbitrum-system-test.log"
-  },
-  "TxPool": {
-    "BlobsSupport": "Disabled"
-  },
-  "Sync": {
-    "NetworkingEnabled": false,
-    "FastSync": false,
-    "SnapSync": false,
-    "FastSyncCatchUpHeightDelta": "10000000000"
-  },
-  "Discovery": {
-    "DiscoveryVersion": "V5"
-  },
-  "JsonRpc": {
-    "Enabled": true,
-    "Port": 20545,
-    "EnginePort": 20551,
-    "UnsecureDevNoRpcAuthentication": true,
-    "AdditionalRpcUrls": [
-      "http://localhost:28551|http;ws|net;eth;subscribe;web3;client;debug"
-    ],
-    "EnabledModules": [
-      "Admin",
-      "Clique",
-      "Consensus",
-      "Db",
-      "Debug",
-      "Deposit",
-      "Erc20",
-      "Eth",
-      "Evm",
-      "Net",
-      "Nft",
-      "Parity",
-      "Personal",
-      "Proof",
-      "Subscribe",
-      "Trace",
-      "TxPool",
-      "Vault",
-      "Web3",
-      "Arbitrum"
-    ]
-  },
-  "Pruning": {
-    "PruningBoundary": 192
-  },
-  "Blocks": {
-    "SecondsPerSlot": 2
-  },
-  "Merge": {
-    "Enabled": true
-  }
-}
diff --git a/src/Nethermind.Arbitrum/Properties/scripts/generate-system-test-config.sh b/src/Nethermind.Arbitrum/Properties/scripts/generate-system-test-config.sh
new file mode 100755
index 000000000..7e550f689
--- /dev/null
+++ b/src/Nethermind.Arbitrum/Properties/scripts/generate-system-test-config.sh
@@ -0,0 +1,127 @@
+#!/bin/bash
+
+set -e
+
+# Parse arguments
+ARBOS_VERSION=${1:-40}
+ACCOUNTS_FILE=${2:-"src/Nethermind.Arbitrum/Properties/accounts/default.json"}
+CONFIG_NAME=${3:-"arbitrum-system-test"}
+MAX_CODE_SIZE=${4:-"0x6000"}
+TEMPLATE_FILE="src/Nethermind.Arbitrum/Properties/chainspec/chainspec.template"
+BUILD_DIR="src/Nethermind/src/Nethermind/artifacts/bin/Nethermind.Runner/debug"
+
+# Output files
+CHAINSPEC_FILE="${BUILD_DIR}/chainspec/${CONFIG_NAME}.json"
+CONFIG_FILE="${BUILD_DIR}/configs/${CONFIG_NAME}.json"
+
+# Validate MAX_CODE_SIZE is hex format
+if [[ ! $MAX_CODE_SIZE =~ ^0x[0-9a-fA-F]+$ ]]; then
+    echo "Error: MAX_CODE_SIZE must be in hex format (e.g., 0x6000)"
+    exit 1
+fi
+
+# Auto-calculate mixHash from ArbOS version
+VERSION_HEX=$(printf '%02X' $ARBOS_VERSION)
+MIX_HASH="0x0000000000000000000000000000000000000000000000${VERSION_HEX}0000000000000000"
+
+# Check if accounts file exists
+if [ ! -f "$ACCOUNTS_FILE" ]; then
+    echo "Error: Accounts file '$ACCOUNTS_FILE' not found"
+    exit 1
+fi
+
+# Read accounts
+ACCOUNTS=$(cat "$ACCOUNTS_FILE" | jq -c .)
+
+# Check if template exists
+if [ ! -f "$TEMPLATE_FILE" ]; then
+    echo "Error: Template file not found at $TEMPLATE_FILE"
+    exit 1
+fi
+
+# Create directories if needed
+mkdir -p "${BUILD_DIR}/chainspec"
+mkdir -p "${BUILD_DIR}/configs"
+
+# Generate chainspec
+echo "Generating configuration:"
+echo "  Config Name: $CONFIG_NAME"
+echo "  ArbOS Version: $ARBOS_VERSION"
+echo "  MixHash: $MIX_HASH (auto-calculated)"
+echo "  Max Code Size: $MAX_CODE_SIZE"
+echo "  Accounts: $ACCOUNTS_FILE"
+echo "  Chainspec: $CHAINSPEC_FILE"
+echo "  Config: $CONFIG_FILE"
+
+# Create chainspec file
+sed "s|{{ARBOS_VERSION}}|$ARBOS_VERSION|g" "$TEMPLATE_FILE" | \
+sed "s|{{MIX_HASH}}|$MIX_HASH|g" | \
+sed "s|{{MAX_CODE_SIZE}}|$MAX_CODE_SIZE|g" | \
+sed "s|{{ACCOUNTS}}|{}|g" | \
+jq --argjson accounts "$ACCOUNTS" '.accounts = $accounts' > "$CHAINSPEC_FILE"
+
+# Create config file that points to the chainspec
+cat > "$CONFIG_FILE" << EOF
+{
+  "\$schema": "https://raw.githubusercontent.com/NethermindEth/core-scripts/refs/heads/main/schemas/config.json",
+  "Init": {
+    "ChainSpecPath": "chainspec/${CONFIG_NAME}.json",
+    "BaseDbPath": "nethermind_db/arbitrum-system-test",
+    "LogFileName": "arbitrum-system-test.log"
+  },
+  "TxPool": {
+    "BlobsSupport": "Disabled"
+  },
+  "Sync": {
+    "NetworkingEnabled": false,
+    "FastSync": false,
+    "SnapSync": false,
+    "FastSyncCatchUpHeightDelta": "10000000000"
+  },
+  "Discovery": {
+    "DiscoveryVersion": "V5"
+  },
+  "JsonRpc": {
+    "Enabled": true,
+    "Port": 20545,
+    "EnginePort": 20551,
+    "UnsecureDevNoRpcAuthentication": true,
+    "AdditionalRpcUrls": [
+      "http://localhost:28551|http;ws|net;eth;subscribe;web3;client;debug"
+    ],
+    "EnabledModules": [
+      "Admin",
+      "Clique",
+      "Consensus",
+      "Db",
+      "Debug",
+      "Deposit",
+      "Erc20",
+      "Eth",
+      "Evm",
+      "Net",
+      "Nft",
+      "Parity",
+      "Personal",
+      "Proof",
+      "Subscribe",
+      "Trace",
+      "TxPool",
+      "Vault",
+      "Web3",
+      "Arbitrum"
+    ]
+  },
+  "Pruning": {
+    "PruningBoundary": 192
+  },
+  "Blocks": {
+    "SecondsPerSlot": 2
+  },
+  "Merge": {
+    "Enabled": true
+  }
+}
+EOF
+
+echo "✓ Configuration generated successfully"