diff --git a/open-sse/handlers/chatCore.ts b/open-sse/handlers/chatCore.ts
index 10e6c32ae6..07e3a25857 100644
--- a/open-sse/handlers/chatCore.ts
+++ b/open-sse/handlers/chatCore.ts
@@ -1218,7 +1218,12 @@ export async function handleChatCore({
           credentials?.providerSpecificData?.preserveEncryptedReasoning === true,
         onIncompatibleReasoning: resolveIncompatibleReasoningAction({
           reasoningTransportFallback,
-          isComboStep: Boolean(comboStepId || comboExecutionKey),
+          // #11178 regressed combo steps whose combo record carries no explicit
+          // stepId/executionKey (plain model-list combos): their explicit
+          // `reasoningTransportFallback: "skip"` config was silently degraded to
+          // "drop". `isCombo` is the combo marker; step ids are optional
+          // finer-grained metadata that plain combos never set.
+          isComboStep: Boolean(isCombo) || Boolean(comboStepId || comboExecutionKey),
           headers: clientRawRequest?.headers ?? null,
         }),
       }
diff --git a/stryker.conf.json b/stryker.conf.json
index 33428a46da..f039eeaca8 100644
--- a/stryker.conf.json
+++ b/stryker.conf.json
@@ -307,6 +307,7 @@
       "tests/unit/public-client-ids-3493.test.ts",
       "tests/unit/publicCreds.test.ts",
       "tests/unit/qoder-oauth-config.test.ts",
+      "tests/unit/quota-exhaustion-cutoff-opencode.test.ts",
       "tests/unit/quota-groups-route.test.ts",
       "tests/unit/quota-key-models-route.test.ts",
       "tests/unit/quota-policy-generalization.test.ts",
diff --git a/tests/unit/check-db-rules-classification.test.ts b/tests/unit/check-db-rules-classification.test.ts
index 5707878b8a..82ca183f0f 100644
--- a/tests/unit/check-db-rules-classification.test.ts
+++ b/tests/unit/check-db-rules-classification.test.ts
@@ -61,6 +61,11 @@ function hasImporter(mod: string, roots: string[]): boolean {
     new RegExp(`(?:import|require)\\s*\\(\\s*['""][^'"]+/db/${escaped}['"]`),
     // dynamic template: import(`…/db/<mod>.ts`) — bin/cli/runtime.mjs uses template literals
     new RegExp(`import\\s*\\(\`[^'"\`]+/db/${escaped}\\.ts\`\\)`),
+    // dynamic via file:// URL helper: import(projectFileUrl("…/db/<mod>.ts")) —
+    // bin/cli/runtime.mjs since #11238 (Windows-safe file:// dynamic imports).
+    new RegExp(
+      `import\\s*\\(\\s*projectFileUrl\\(\\s*['""][^'"]+/db/${escaped}\\.ts['"]\\s*\\)\\s*\\)`
+    ),
     // relative import within db/: from "./<mod>" or from "./<mod>"
     new RegExp(`from\\s+['"]\\.\\.?/${escaped}['"]`),
   ];