diff --git a/onchain/script/DeployBase.sol b/onchain/script/DeployBase.sol
index afeb034..9c7aed2 100644
--- a/onchain/script/DeployBase.sol
+++ b/onchain/script/DeployBase.sol
@@ -93,6 +93,10 @@ contract DeployBase is Script {
         } else {
             optimizerAddress = optimizer;
             console.log("Using existing optimizer at:", optimizerAddress);
+            // Guard: ensure the pre-existing optimizer is not a stub (e.g. OptimizerV3Push3).
+            // OptimizerV3Push3.getLiquidityParams() always reverts; a live optimizer must not.
+            (bool ok,) = optimizerAddress.staticcall(abi.encodeWithSignature("getLiquidityParams()"));
+            require(ok, "DeployBase: optimizer getLiquidityParams() reverted - stub or misconfigured address");
         }
 
         // Deploy LiquidityManager
diff --git a/onchain/src/OptimizerV3Push3.sol b/onchain/src/OptimizerV3Push3.sol
index 31bb68a..c44ee96 100644
--- a/onchain/src/OptimizerV3Push3.sol
+++ b/onchain/src/OptimizerV3Push3.sol
@@ -10,18 +10,21 @@ import { OptimizerV3Push3Lib } from "./OptimizerV3Push3Lib.sol";
  *         The actual calculation logic lives in OptimizerV3Push3Lib and is
  *         shared with OptimizerV3 so that transpiler changes require only
  *         one edit point.
+ * @custom:experimental This contract is a transpiler harness / backtesting stub only.
+ *                      It must NOT be wired as the live optimizer in any production deployment.
+ *                      Use OptimizerV3 (UUPS proxy) for production.
  */
 contract OptimizerV3Push3 is IOptimizer {
     /**
      * @inheritdoc IOptimizer
-     * @dev Calls calculateParams with zeroed inputs (percentageStaked=0, averageTaxRate=0),
-     *      producing bear-mode defaults: (ci=0, anchorShare=0.3e18, anchorWidth=100, discoveryDepth=0.3e18).
-     *      This contract is a standalone transpiler output without access to on-chain stake data;
-     *      use OptimizerV3 (which inherits Optimizer) for a live deployment with real inputs.
+     * @dev Always reverts — this contract is a transpiler harness, not a production optimizer.
+     *      Calling getLiquidityParams() on this stub is a deployment misconfiguration.
+     *      LiquidityManager.recenter() has a try/catch that falls back to bear-mode defaults,
+     *      so accidental wiring produces a permanent bear-mode lock rather than a silent failure.
+     *      Use OptimizerV3 (which inherits Optimizer) for a live deployment with real inputs.
      */
-    function getLiquidityParams() external view returns (uint256 capitalInefficiency, uint256 anchorShare, uint24 anchorWidth, uint256 discoveryDepth) {
-        OptimizerInput[8] memory inputs;
-        return calculateParams(inputs);
+    function getLiquidityParams() external pure returns (uint256, uint256, uint24, uint256) {
+        revert("OptimizerV3Push3: not for production use");
     }
 
     /**