diff --git a/Makefile b/Makefile
index ad51512e..2dcbcdce 100644
--- a/Makefile
+++ b/Makefile
@@ -119,7 +119,7 @@ checkout-base-contracts-commit:
 ##
 # Task Signer Tool
 ##
-SIGNER_TOOL_COMMIT=dbe7f9e358bf99e367441e95d8f6ce28716c4cc9
+SIGNER_TOOL_COMMIT=abbfa09210582eca32ad4873d862994a5957fbc2
 SIGNER_TOOL_PATH=signer-tool
 
 .PHONY: checkout-signer-tool
diff --git a/sepolia/2025-11-18-set-jovian-parameters/.env b/sepolia/2025-11-18-set-jovian-parameters/.env
new file mode 100644
index 00000000..21050db5
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/.env
@@ -0,0 +1,19 @@
+# Base Contracts commit
+BASE_CONTRACTS_COMMIT=51788f920e368e72c63cef24a5e1ea0f6562d9a5
+
+# Optimism commit  (op-contracts/v5.0.0)
+OP_COMMIT=d09c836f818c73ae139f60b717654c4e53712743
+
+# Contract addresses
+SYSTEM_CONFIG=0xf272670eb55e895584501d564AfEB048bEd26194
+OWNER_SAFE=0x0fe884546476dDd290eC46318785046ef68a0BA9
+CB_SIGNER_SAFE_ADDR=0x646132A1667ca7aD00d36616AFBA1A28116C770A
+CB_NESTED_SAFE_ADDR=0x5dfEB066334B67355A15dc9b67317fD2a2e1f77f
+CB_SC_SAFE_ADDR=0x6AF0674791925f767060Dd52f7fB20984E8639d8
+OP_SIGNER_SAFE_ADDR=0x6AF0674791925f767060Dd52f7fB20984E8639d8
+
+# Jovian parameters
+DA_FOOTPRINT_GAS_SCALAR=312
+MIN_BASE_FEE=200000
+
+RECORD_STATE_DIFF=true
diff --git a/sepolia/2025-11-18-set-jovian-parameters/FACILITATORS.md b/sepolia/2025-11-18-set-jovian-parameters/FACILITATORS.md
new file mode 100644
index 00000000..31b29b1c
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/FACILITATORS.md
@@ -0,0 +1,47 @@
+#### Execute the transaction
+
+1. Collect outputs from all participating signers.
+1. Concatenate all signatures and export it as the `SIGNATURES`
+   environment variable, i.e. `export
+SIGNATURES="[SIGNATURE1][SIGNATURE2]..."`.
+1. Run the `make execute` or `make approve` command as described below to execute the transaction.
+
+For example, if the quorum is 3 and you get the following outputs:
+
+```shell
+Data:  0xDEADBEEF
+Signer: 0xC0FFEE01
+Signature: AAAA
+```
+
+```shell
+Data:  0xDEADBEEF
+Signer: 0xC0FFEE02
+Signature: BBBB
+```
+
+```shell
+Data:  0xDEADBEEF
+Signer: 0xC0FFEE03
+Signature: CCCC
+```
+
+Coinbase facilitator:
+
+```bash
+SIGNATURES=AAAABBBBCCCC make approve-cb
+```
+
+```bash
+SIGNATURES=AAAABBBBCCCC make approve-cb-sc
+```
+
+```bash
+SIGNATURES=AAAABBBBCCCC make approve-op
+```
+
+Once the signatures have been submitted approving the transaction for all nested Safes run:
+
+```bash
+make execute
+```
diff --git a/sepolia/2025-11-18-set-jovian-parameters/Makefile b/sepolia/2025-11-18-set-jovian-parameters/Makefile
new file mode 100644
index 00000000..d31ef6b4
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/Makefile
@@ -0,0 +1,83 @@
+include ../../Makefile
+include ../../Multisig.mk
+
+include ../.env
+include .env
+
+ifndef LEDGER_ACCOUNT
+override LEDGER_ACCOUNT = 1
+endif
+
+# Sepolia Commands
+
+# OWNER_SAFE/
+# ├── CB_SIGNER_SAFE_ADDR/
+# │   ├── CB_NESTED_SAFE_ADDR/
+# │   │   └── Signers
+# │   └── CB_SC_SAFE_ADDR/
+# │       └── Signers
+# └── OP_SIGNER_SAFE_ADDR/
+#     └── Signers
+
+RPC_URL = $(L1_RPC_URL)
+SCRIPT_NAME = SetJovianParametersScript
+
+.PHONY: gen-validation-cb
+gen-validation-cb: checkout-signer-tool run-script-cb
+
+.PHONY: run-script-cb
+run-script-cb:
+	cd $(SIGNER_TOOL_PATH); \
+	npm ci; \
+	bun run scripts/genValidationFile.ts --rpc-url $(RPC_URL) \
+	--ledger-id $(LEDGER_ACCOUNT) \
+	--workdir .. --forge-cmd 'forge script --rpc-url $(RPC_URL) \
+	$(SCRIPT_NAME) --sig "sign(address[])" "[$(CB_NESTED_SAFE_ADDR), $(CB_SIGNER_SAFE_ADDR)]" --sender 0x7f10098bd53519c739ca8a404afe127647d94774' --out ../validations/cb-signer.json;
+
+
+.PHONY: gen-validation-cb-sc
+gen-validation-cb-sc: checkout-signer-tool run-script-cb-sc
+
+.PHONY: run-script-cb-sc
+run-script-cb-sc:
+	cd $(SIGNER_TOOL_PATH); \
+	npm ci; \
+	bun run scripts/genValidationFile.ts --rpc-url $(RPC_URL) \
+	--ledger-id $(LEDGER_ACCOUNT) \
+	--workdir .. --forge-cmd 'forge script --rpc-url $(RPC_URL) \
+	$(SCRIPT_NAME) --sig "sign(address[])" "[$(CB_SC_SAFE_ADDR), $(CB_SIGNER_SAFE_ADDR)]" --sender 0x7f10098bd53519c739ca8a404afe127647d94774' --out ../validations/cb-sc-signer.json;
+
+.PHONY: gen-validation-op
+gen-validation-op: checkout-signer-tool run-script-op
+
+.PHONY: run-script-op
+run-script-op:
+	cd $(SIGNER_TOOL_PATH); \
+	npm ci; \
+	bun run scripts/genValidationFile.ts --rpc-url $(RPC_URL) \
+	--ledger-id $(LEDGER_ACCOUNT) \
+	--workdir .. --forge-cmd 'forge script --rpc-url $(RPC_URL) \
+	$(SCRIPT_NAME) --sig "sign(address[])" "[$(OP_SIGNER_SAFE_ADDR)]" --sender 0x0CF2F86C3338993ce10F74d6f4B095712c7efe26' --out ../validations/op-signer.json;
+
+
+# CB
+.PHONY: approve-cb
+approve-cb:
+	$(call MULTISIG_APPROVE,$(CB_NESTED_SAFE_ADDR) $(CB_SIGNER_SAFE_ADDR),$(SIGNATURES))
+
+.PHONY: approve-cb-sc
+approve-cb-sc:
+	$(call MULTISIG_APPROVE,$(CB_SC_SAFE_ADDR) $(CB_SIGNER_SAFE_ADDR),$(SIGNATURES))
+
+.PHONY: approve-cb-coordinator
+approve-cb-coordinator:
+	$(call MULTISIG_APPROVE,$(CB_SIGNER_SAFE_ADDR),0x)
+
+.PHONY: approve-op
+approve-op:
+	$(call MULTISIG_APPROVE,$(OP_SIGNER_SAFE_ADDR),$(SIGNATURES))
+
+# Execute
+.PHONY: execute
+execute:
+	$(call MULTISIG_EXECUTE,0x)
diff --git a/sepolia/2025-11-18-set-jovian-parameters/README.md b/sepolia/2025-11-18-set-jovian-parameters/README.md
new file mode 100644
index 00000000..83c2b6e5
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/README.md
@@ -0,0 +1,58 @@
+# Set Jovian Parameters on Base Sepolia
+
+Status: READY TO SIGN
+
+## Description
+
+This task sets the Jovian hardfork parameters on Base Sepolia's SystemConfig contract. The parameters being set are:
+
+- `setDAFootprintGasScalar(312)` - Sets the data availability footprint gas scalar
+- `setMinBaseFee(200000)` - Sets the minimum base fee
+
+These parameters activate with the Jovian hardfork and affect data availability fee calculations and base fee management on the L2.
+
+## Procedure
+
+## Install dependencies
+
+### 1. Update foundry
+
+```bash
+foundryup
+```
+
+### 2. Install Node.js if needed
+
+First, check if you have node installed
+
+```bash
+node --version
+```
+
+If you see a version output from the above command, you can move on. Otherwise, install node
+
+```bash
+brew install node
+```
+
+## Approving the Update transaction
+
+### 1. Update repo:
+
+```bash
+cd contract-deployments
+git pull
+```
+
+### 2. Run the signing tool (NOTE: do not enter the task directory. Run this command from the project's root).
+
+```bash
+make sign-task
+```
+
+### 3. Open the UI at [http://localhost:3000](http://localhost:3000)
+
+Be sure to select the correct task user from the list of available users to sign.
+After completion, the signer tool can be closed by using Ctrl + c
+
+### 4. Send signature to facilitator
diff --git a/sepolia/2025-11-18-set-jovian-parameters/foundry.toml b/sepolia/2025-11-18-set-jovian-parameters/foundry.toml
new file mode 100644
index 00000000..85225f30
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/foundry.toml
@@ -0,0 +1,21 @@
+[profile.default]
+src = 'src'
+out = 'out'
+libs = ['lib']
+broadcast = 'records'
+fs_permissions = [{ access = "read-write", path = "./" }]
+optimizer = true
+optimizer_runs = 999999
+solc_version = "0.8.15"
+via-ir = false
+remappings = [
+    '@eth-optimism-bedrock/=lib/optimism/packages/contracts-bedrock/',
+    '@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts',
+    '@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts',
+    '@rari-capital/solmate/=lib/solmate/',
+    '@base-contracts/=lib/base-contracts',
+    'solady/=lib/solady/src/',
+]
+evm_version = "prague"
+
+# See more config options https://github.com/foundry-rs/foundry/tree/master/config
diff --git a/sepolia/2025-11-18-set-jovian-parameters/script/SetJovianParameters.s.sol b/sepolia/2025-11-18-set-jovian-parameters/script/SetJovianParameters.s.sol
new file mode 100644
index 00000000..21059cca
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/script/SetJovianParameters.s.sol
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.15;
+
+import {Vm} from "forge-std/Vm.sol";
+import {console} from "forge-std/console.sol";
+import {Simulation} from "@base-contracts/script/universal/Simulation.sol";
+import {IMulticall3} from "forge-std/interfaces/IMulticall3.sol";
+
+import {MultisigScript} from "@base-contracts/script/universal/MultisigScript.sol";
+
+interface ISystemConfig {
+    function daFootprintGasScalar() external view returns (uint16);
+    function minBaseFee() external view returns (uint64);
+    function setDAFootprintGasScalar(uint16 _daFootprintGasScalar) external;
+    function setMinBaseFee(uint64 _minBaseFee) external;
+}
+
+contract SetJovianParametersScript is MultisigScript {
+    address internal immutable OWNER_SAFE;
+    address internal immutable SYSTEM_CONFIG;
+
+    uint16 internal immutable DA_FOOTPRINT_GAS_SCALAR;
+    uint64 internal immutable MIN_BASE_FEE;
+
+    constructor() {
+        OWNER_SAFE = vm.envAddress("OWNER_SAFE");
+        SYSTEM_CONFIG = vm.envAddress("SYSTEM_CONFIG");
+        DA_FOOTPRINT_GAS_SCALAR = uint16(vm.envUint("DA_FOOTPRINT_GAS_SCALAR"));
+        MIN_BASE_FEE = uint64(vm.envUint("MIN_BASE_FEE"));
+    }
+
+    function setUp() external view {
+        // Log current values for reference
+        console.log("Current DA Footprint Gas Scalar:", ISystemConfig(SYSTEM_CONFIG).daFootprintGasScalar());
+        console.log("Current Min Base Fee:", ISystemConfig(SYSTEM_CONFIG).minBaseFee());
+        console.log("New DA Footprint Gas Scalar:", DA_FOOTPRINT_GAS_SCALAR);
+        console.log("New Min Base Fee:", MIN_BASE_FEE);
+    }
+
+    function _postCheck(Vm.AccountAccess[] memory, Simulation.Payload memory) internal view override {
+        vm.assertEq(
+            ISystemConfig(SYSTEM_CONFIG).daFootprintGasScalar(),
+            DA_FOOTPRINT_GAS_SCALAR,
+            "DA Footprint Gas Scalar mismatch"
+        );
+        vm.assertEq(ISystemConfig(SYSTEM_CONFIG).minBaseFee(), MIN_BASE_FEE, "Min Base Fee mismatch");
+    }
+
+    function _buildCalls() internal view override returns (IMulticall3.Call3Value[] memory) {
+        IMulticall3.Call3Value[] memory calls = new IMulticall3.Call3Value[](2);
+
+        calls[0] = IMulticall3.Call3Value({
+            target: SYSTEM_CONFIG,
+            allowFailure: false,
+            callData: abi.encodeCall(ISystemConfig.setDAFootprintGasScalar, (DA_FOOTPRINT_GAS_SCALAR)),
+            value: 0
+        });
+
+        calls[1] = IMulticall3.Call3Value({
+            target: SYSTEM_CONFIG,
+            allowFailure: false,
+            callData: abi.encodeCall(ISystemConfig.setMinBaseFee, (MIN_BASE_FEE)),
+            value: 0
+        });
+
+        return calls;
+    }
+
+    function _ownerSafe() internal view override returns (address) {
+        return OWNER_SAFE;
+    }
+}
diff --git a/sepolia/2025-11-18-set-jovian-parameters/validations/cb-sc-signer.json b/sepolia/2025-11-18-set-jovian-parameters/validations/cb-sc-signer.json
new file mode 100644
index 00000000..e4743e0a
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/validations/cb-sc-signer.json
@@ -0,0 +1,121 @@
+{
+  "cmd": "forge script --rpc-url https://ethereum-full-sepolia-k8s-dev.cbhq.net SetJovianParametersScript --sig sign(address[]) [0x6AF0674791925f767060Dd52f7fB20984E8639d8,0x646132A1667ca7aD00d36616AFBA1A28116C770A] --sender 0x7f10098bd53519c739ca8a404afe127647d94774",
+  "ledgerId": 1,
+  "rpcUrl": "https://ethereum-full-sepolia-k8s-dev.cbhq.net",
+  "expectedDomainAndMessageHashes": {
+    "address": "0x0fe884546476dDd290eC46318785046ef68a0BA9",
+    "domainHash": "0x6f25427e79742a1eb82c103e2bf43c85fc59509274ec258ad6ed841c4a0048aa",
+    "messageHash": "0x584d0cc61e6fffd9fea6c4cc3b242b782e0307c125b98ddc38cce23939b97eb6"
+  },
+  "stateOverrides": [
+    {
+      "name": "Proxy Admin Owner - Sepolia",
+      "address": "0x0fe884546476ddd290ec46318785046ef68a0ba9",
+      "overrides": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000004",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Override the threshold to 1 so the transaction simulation can occur."
+        }
+      ]
+    },
+    {
+      "name": "CB Coordinator Safe - Sepolia",
+      "address": "0x646132a1667ca7ad00d36616afba1a28116c770a",
+      "overrides": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000004",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Override the threshold to 1 so the transaction simulation can occur."
+        }
+      ]
+    },
+    {
+      "name": "Mock OP Safe / Mock Security Council - Sepolia",
+      "address": "0x6af0674791925f767060dd52f7fb20984e8639d8",
+      "overrides": [
+        {
+          "key": "0x3c35e253d3d819dc80b00bec4c486bf001629e935fee5b7278f4b79da0c2fb40",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Simulates an approval from msg.sender in order for the task simulation to succeed."
+        }
+      ]
+    }
+  ],
+  "stateChanges": [
+    {
+      "name": "Proxy Admin Owner - Sepolia",
+      "address": "0x0fe884546476ddd290ec46318785046ef68a0ba9",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x000000000000000000000000000000000000000000000000000000000000001b",
+          "after": "0x000000000000000000000000000000000000000000000000000000000000001c",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        },
+        {
+          "key": "0x8edc1cfc1840fa9ef854a3f743c41fe8ca1aa29e77f34b71c732200173cfea88",
+          "before": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "after": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Increment approvedHashes",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "CB Coordinator Safe - Sepolia",
+      "address": "0x646132a1667ca7ad00d36616afba1a28116c770a",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x000000000000000000000000000000000000000000000000000000000000000a",
+          "after": "0x000000000000000000000000000000000000000000000000000000000000000b",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        },
+        {
+          "key": "0x97d646f621b0f519cef0ddd752bf96c09d32d77408e838dc7e60be097f3f35ec",
+          "before": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "after": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Increment approvedHashes",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "Mock OP Safe / Mock Security Council - Sepolia",
+      "address": "0x6af0674791925f767060dd52f7fb20984e8639d8",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x0000000000000000000000000000000000000000000000000000000000000011",
+          "after": "0x0000000000000000000000000000000000000000000000000000000000000012",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "System Config - Sepolia",
+      "address": "0xf272670eb55e895584501d564afeb048bed26194",
+      "changes": [
+        {
+          "key": "0x000000000000000000000000000000000000000000000000000000000000006a",
+          "before": "0x0000000000000000000000000000000000000000000000000000000400000032",
+          "after": "0x0000000000000000000001380000000000000000000000000000000400000032",
+          "description": "Sets the DA Footprint Gas Scalar to 312 (0x0138)",
+          "allowDifference": false
+        },
+        {
+          "key": "0x000000000000000000000000000000000000000000000000000000000000006c",
+          "before": "0x000000000000000000000000c2be75506d5724086deb7245bd260cc9753911be",
+          "after": "0x000000000000000000030d40c2be75506d5724086deb7245bd260cc9753911be",
+          "description": "Sets the Min Base Fee to 200000 (0x030d40)",
+          "allowDifference": false
+        }
+      ]
+    }
+  ],
+  "balanceChanges": []
+}
diff --git a/sepolia/2025-11-18-set-jovian-parameters/validations/cb-signer.json b/sepolia/2025-11-18-set-jovian-parameters/validations/cb-signer.json
new file mode 100644
index 00000000..7473cbda
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/validations/cb-signer.json
@@ -0,0 +1,126 @@
+{
+  "cmd": "forge script --rpc-url https://ethereum-full-sepolia-k8s-dev.cbhq.net SetJovianParametersScript --sig sign(address[]) [0x5dfEB066334B67355A15dc9b67317fD2a2e1f77f,0x646132A1667ca7aD00d36616AFBA1A28116C770A] --sender 0x7f10098bd53519c739ca8a404afe127647d94774",
+  "ledgerId": 1,
+  "rpcUrl": "https://ethereum-full-sepolia-k8s-dev.cbhq.net",
+  "expectedDomainAndMessageHashes": {
+    "address": "0x0fe884546476dDd290eC46318785046ef68a0BA9",
+    "domainHash": "0x0127bbb910536860a0757a9c0ffcdf9e4452220f566ed83af1f27f9e833f0e23",
+    "messageHash": "0x826d763e5f8e6b8dc34ea6ac7a7732afec3b3f59a75b89f8a473dcc5823bafac"
+  },
+  "stateOverrides": [
+    {
+      "name": "Proxy Admin Owner - Sepolia",
+      "address": "0x0fe884546476ddd290ec46318785046ef68a0ba9",
+      "overrides": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000004",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Override the threshold to 1 so the transaction simulation can occur."
+        }
+      ]
+    },
+    {
+      "name": "CB Signer Safe - Sepolia",
+      "address": "0x5dfeb066334b67355a15dc9b67317fd2a2e1f77f",
+      "overrides": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000004",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Override the threshold to 1 so the transaction simulation can occur."
+        },
+        {
+          "key": "0x7fe7cf17ba7e8539dbc7761dda7051425e4980a5488c2da7301fc2d8d1e9fa30",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Simulates an approval from msg.sender in order for the task simulation to succeed."
+        }
+      ]
+    },
+    {
+      "name": "CB Coordinator Safe - Sepolia",
+      "address": "0x646132a1667ca7ad00d36616afba1a28116c770a",
+      "overrides": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000004",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Override the threshold to 1 so the transaction simulation can occur."
+        }
+      ]
+    }
+  ],
+  "stateChanges": [
+    {
+      "name": "Proxy Admin Owner - Sepolia",
+      "address": "0x0fe884546476ddd290ec46318785046ef68a0ba9",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x000000000000000000000000000000000000000000000000000000000000001b",
+          "after": "0x000000000000000000000000000000000000000000000000000000000000001c",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        },
+        {
+          "key": "0x8edc1cfc1840fa9ef854a3f743c41fe8ca1aa29e77f34b71c732200173cfea88",
+          "before": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "after": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Increment approvedHashes",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "CB Signer Safe - Sepolia",
+      "address": "0x5dfeb066334b67355a15dc9b67317fd2a2e1f77f",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x000000000000000000000000000000000000000000000000000000000000000d",
+          "after": "0x000000000000000000000000000000000000000000000000000000000000000e",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "CB Coordinator Safe - Sepolia",
+      "address": "0x646132a1667ca7ad00d36616afba1a28116c770a",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x000000000000000000000000000000000000000000000000000000000000000a",
+          "after": "0x000000000000000000000000000000000000000000000000000000000000000b",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        },
+        {
+          "key": "0x9a9a340b11831be720964539a007b72fec48bc53b0edc6c53ed1dee5612719b3",
+          "before": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "after": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Increment approvedHashes",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "System Config - Sepolia",
+      "address": "0xf272670eb55e895584501d564afeb048bed26194",
+      "changes": [
+        {
+          "key": "0x000000000000000000000000000000000000000000000000000000000000006a",
+          "before": "0x0000000000000000000000000000000000000000000000000000000400000032",
+          "after": "0x0000000000000000000001380000000000000000000000000000000400000032",
+          "description": "Sets the DA Footprint Gas Scalar to 312 (0x0138)",
+          "allowDifference": false
+        },
+        {
+          "key": "0x000000000000000000000000000000000000000000000000000000000000006c",
+          "before": "0x000000000000000000000000c2be75506d5724086deb7245bd260cc9753911be",
+          "after": "0x000000000000000000030d40c2be75506d5724086deb7245bd260cc9753911be",
+          "description": "Sets the Min Base Fee to 200000 (0x030d40)",
+          "allowDifference": false
+        }
+      ]
+    }
+  ],
+  "balanceChanges": []
+}
diff --git a/sepolia/2025-11-18-set-jovian-parameters/validations/op-signer.json b/sepolia/2025-11-18-set-jovian-parameters/validations/op-signer.json
new file mode 100644
index 00000000..3ee300cd
--- /dev/null
+++ b/sepolia/2025-11-18-set-jovian-parameters/validations/op-signer.json
@@ -0,0 +1,90 @@
+{
+  "cmd": "forge script --rpc-url https://ethereum-full-sepolia-k8s-dev.cbhq.net SetJovianParametersScript --sig sign(address[]) [0x6AF0674791925f767060Dd52f7fB20984E8639d8] --sender 0x0CF2F86C3338993ce10F74d6f4B095712c7efe26",
+  "ledgerId": 1,
+  "rpcUrl": "https://ethereum-full-sepolia-k8s-dev.cbhq.net",
+  "expectedDomainAndMessageHashes": {
+    "address": "0x0fe884546476dDd290eC46318785046ef68a0BA9",
+    "domainHash": "0x6f25427e79742a1eb82c103e2bf43c85fc59509274ec258ad6ed841c4a0048aa",
+    "messageHash": "0xcb1e56ca6002c1031dc54f1d2cebe111f24f5997476b0ee37909ca7078ac1d83"
+  },
+  "stateOverrides": [
+    {
+      "name": "Proxy Admin Owner - Sepolia",
+      "address": "0x0fe884546476ddd290ec46318785046ef68a0ba9",
+      "overrides": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000004",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Override the threshold to 1 so the transaction simulation can occur."
+        }
+      ]
+    },
+    {
+      "name": "Mock OP Safe / Mock Security Council - Sepolia",
+      "address": "0x6af0674791925f767060dd52f7fb20984e8639d8",
+      "overrides": [
+        {
+          "key": "0x9a1a1e38d44b5a62ad5c57dafdf8e4dbcd373354e02c169028218b8664c81801",
+          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Simulates an approval from msg.sender in order for the task simulation to succeed."
+        }
+      ]
+    }
+  ],
+  "stateChanges": [
+    {
+      "name": "Proxy Admin Owner - Sepolia",
+      "address": "0x0fe884546476ddd290ec46318785046ef68a0ba9",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x000000000000000000000000000000000000000000000000000000000000001b",
+          "after": "0x000000000000000000000000000000000000000000000000000000000000001c",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        },
+        {
+          "key": "0xa5855c998346b3e542ba91df8b8a8b17cf51c481a36485b6f7831bb3331db193",
+          "before": "0x0000000000000000000000000000000000000000000000000000000000000000",
+          "after": "0x0000000000000000000000000000000000000000000000000000000000000001",
+          "description": "Increment approvedHashes",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "Mock OP Safe / Mock Security Council - Sepolia",
+      "address": "0x6af0674791925f767060dd52f7fb20984e8639d8",
+      "changes": [
+        {
+          "key": "0x0000000000000000000000000000000000000000000000000000000000000005",
+          "before": "0x0000000000000000000000000000000000000000000000000000000000000011",
+          "after": "0x0000000000000000000000000000000000000000000000000000000000000012",
+          "description": "Increments the nonce",
+          "allowDifference": false
+        }
+      ]
+    },
+    {
+      "name": "System Config - Sepolia",
+      "address": "0xf272670eb55e895584501d564afeb048bed26194",
+      "changes": [
+        {
+          "key": "0x000000000000000000000000000000000000000000000000000000000000006a",
+          "before": "0x0000000000000000000000000000000000000000000000000000000400000032",
+          "after": "0x0000000000000000000001380000000000000000000000000000000400000032",
+          "description": "Sets the DA Footprint Gas Scalar to 312 (0x0138)",
+          "allowDifference": false
+        },
+        {
+          "key": "0x000000000000000000000000000000000000000000000000000000000000006c",
+          "before": "0x000000000000000000000000c2be75506d5724086deb7245bd260cc9753911be",
+          "after": "0x000000000000000000030d40c2be75506d5724086deb7245bd260cc9753911be",
+          "description": "Sets the Min Base Fee to 200000 (0x030d40)",
+          "allowDifference": false
+        }
+      ]
+    }
+  ],
+  "balanceChanges": []
+}