diff --git a/packages/cluster-tool/src/orchestration/ClusterBuildDefaults.ts b/packages/cluster-tool/src/orchestration/ClusterBuildDefaults.ts
index bf09aa62..a4eea77a 100644
--- a/packages/cluster-tool/src/orchestration/ClusterBuildDefaults.ts
+++ b/packages/cluster-tool/src/orchestration/ClusterBuildDefaults.ts
@@ -55,6 +55,19 @@ const MinFromWireAmount = 100_000_000
  * flows never pay it and system-caused reverts refund in full.
  */
 const FromWireRevertFeeBps = 10
+/**
+ * Epochs a PENDING uwreq may wait for its underwriter race before
+ * `sysio.uwrit::pruneuwreqs` expires it (refund/revert + EXPIRED). Mirrors
+ * the contract default; flow races resolve within an epoch, so the timeout
+ * only fires for genuinely abandoned requests (SEC-129 / WSA-223).
+ */
+const UwreqPendingTimeoutEpochs = 10
+/**
+ * Epochs a terminal (COMPLETED / REJECTED / EXPIRED) uwreq row is retained
+ * for audit before `sysio.uwrit::pruneuwreqs` erases it. Mirrors the
+ * contract default (SEC-129 / WSA-223).
+ */
+const UwreqRetentionEpochs = 10
 /** Epoch envelope-log retention. */
 const EnvelopeLogRetentionEpochs = 10
 /** Dev-default batch-operator group COUNT (sliding-window schedule; per-flow overridable via ClusterConfig). */
@@ -697,7 +710,9 @@ export namespace ClusterBuildDefaults {
           fee_bps: SwapFeeBps,
           collateral_lock_duration_ms: CollateralLockDurationMs,
           min_fromwire_amount: MinFromWireAmount,
-          fromwire_revert_fee_bps: FromWireRevertFeeBps
+          fromwire_revert_fee_bps: FromWireRevertFeeBps,
+          uwreq_pending_timeout_epochs: UwreqPendingTimeoutEpochs,
+          uwreq_retention_epochs: UwreqRetentionEpochs
         }
       )
     )
diff --git a/packages/cluster-tool/tests/orchestration/steps/contracts/sysio/UwritContractSteps.test.ts b/packages/cluster-tool/tests/orchestration/steps/contracts/sysio/UwritContractSteps.test.ts
index 20d3e219..0a87a68c 100644
--- a/packages/cluster-tool/tests/orchestration/steps/contracts/sysio/UwritContractSteps.test.ts
+++ b/packages/cluster-tool/tests/orchestration/steps/contracts/sysio/UwritContractSteps.test.ts
@@ -4,16 +4,19 @@ import { SysioContracts } from "@wireio/sdk-core"
 
 describe("Steps.contracts.sysio.uwrit", () => {
   it("setconfig carries the uwrit::setconfig data", () => {
-    // `sysio.uwrit::setconfig` grew the swap-from-WIRE ingress rails: the
-    // escrow floor (`min_fromwire_amount`, 9-dec base units) and the
-    // caller-fault drain-revert fee (`fromwire_revert_fee_bps`). The action
-    // type requires all four fields — a payload missing the new pair fails
+    // `sysio.uwrit::setconfig` grew the swap-from-WIRE ingress rails (the
+    // escrow floor `min_fromwire_amount` + caller-fault drain-revert fee
+    // `fromwire_revert_fee_bps`) and the SEC-129 / WSA-223 UWREQ lifecycle
+    // knobs (`uwreq_pending_timeout_epochs` + `uwreq_retention_epochs`). The
+    // action type requires all six fields — a payload missing any pair fails
     // chain-side serialization.
     const data: SysioContracts.SysioUwritSetconfigAction = {
       fee_bps: 30,
       collateral_lock_duration_ms: 600_000,
       min_fromwire_amount: 100_000_000,
-      fromwire_revert_fee_bps: 10
+      fromwire_revert_fee_bps: 10,
+      uwreq_pending_timeout_epochs: 10,
+      uwreq_retention_epochs: 10
     }
     const step = Steps.contracts.sysio.uwrit.planSetconfig(
       Report.Actor.Sysio,
@@ -28,6 +31,8 @@ describe("Steps.contracts.sysio.uwrit", () => {
     expect(step.input.data.fee_bps).toBe(30)
     expect(step.input.data.min_fromwire_amount).toBe(100_000_000)
     expect(step.input.data.fromwire_revert_fee_bps).toBe(10)
+    expect(step.input.data.uwreq_pending_timeout_epochs).toBe(10)
+    expect(step.input.data.uwreq_retention_epochs).toBe(10)
     expect(typeof step.runner).toBe("function")
   })
 })