diff --git a/STATE.md b/STATE.md
index b534f1b..12221bb 100644
--- a/STATE.md
+++ b/STATE.md
@@ -36,4 +36,4 @@
 - [2026-03-14] remove MAX_ANCHOR_WIDTH clamp in ThreePositionStrategy (#783)
 - [2026-03-14] increase CALCULATE_PARAMS_GAS_LIMIT from 200k to 500k (#782)
 - [2026-03-15] add evolution run 8 champion to seed pool (#781)
-- [2026-03-15] FitnessEvaluator.t.sol broken on Base mainnet fork (#780)
+- [2026-03-15] fix FitnessEvaluator.t.sol broken on Base mainnet fork (#780)
diff --git a/onchain/test/FitnessEvaluator.t.sol b/onchain/test/FitnessEvaluator.t.sol
index ca7c258..755c44d 100644
--- a/onchain/test/FitnessEvaluator.t.sol
+++ b/onchain/test/FitnessEvaluator.t.sol
@@ -143,6 +143,11 @@ contract FitnessEvaluator is Test {
     address internal constant NPM_ADDR = 0x03a520b32C04BF3bEEf7BEb72E919cf822Ed34f1;
     // Base mainnet Uniswap V3 Factory — https://basescan.org/address/0x33128a8fC17869897dcE68Ed026d694621f6FDfD
     address internal constant V3_FACTORY = 0x33128a8fC17869897dcE68Ed026d694621f6FDfD;
+    /// @dev Intentionally differs from DeployBaseMainnet.sol (0xf6a3...D9011).
+    ///      On a Base mainnet fork that address already has contract bytecode, which
+    ///      causes LiquidityManager.setFeeDestination() to set feeDestinationLocked=true
+    ///      and subsequently revert if called again during snapshot/revert cycles.
+    ///      This keccak-derived address is a guaranteed EOA on any live network.
     address internal constant FEE_DEST = 0x8A9145E1Ea4C4d7FB08cF1011c8ac1F0e10F9383;
 
     /// @dev Fixed address used with vm.etch to inject candidate bytecode.
@@ -230,7 +235,10 @@ contract FitnessEvaluator is Test {
             string memory candidateId = vm.readLine(idsFile);
             string memory bytecodeHex = vm.readLine(bytecodesFile);
             if (bytes(candidateId).length == 0) break;
-            if (bytes(bytecodeHex).length == 0) break;
+            if (bytes(bytecodeHex).length == 0) {
+                console.log("FitnessEvaluator: bytecodes.txt EOF before ids.txt - pipeline mismatch, stopping");
+                break;
+            }
 
             // Revert to clean post-deploy state for each candidate.
             vm.revertTo(baseSnap);