diff --git a/packages/loopover-miner/lib/chat-action-dispatch.js b/packages/loopover-miner/lib/chat-action-dispatch.js
index 11b44bf251..346cf991c6 100644
--- a/packages/loopover-miner/lib/chat-action-dispatch.js
+++ b/packages/loopover-miner/lib/chat-action-dispatch.js
@@ -71,7 +71,17 @@ export async function dispatchChatAction(request, options = {}) {
     return { ok: false, status: "invalid_params", action };
   }
 
-  const result = await registered.handler(request);
+  let result;
+  try {
+    result = await registered.handler(request);
+  } catch {
+    // A handler that throws fails closed with the module's typed result shape (#6989), consistent with the
+    // paramsValidator catch above. The thrown value is deliberately NOT echoed back: a handler wraps
+    // arbitrary action work (e.g. a network call), so its error could carry external detail -- the sibling
+    // fail-closed paths (sentry.js, pretooluse-hook.js) likewise swallow rather than surface it. A distinct
+    // "handler_error" status still lets a caller tell an execution failure from a params-validation failure.
+    return { ok: false, status: "handler_error", action };
+  }
   return { ok: true, status: "dispatched", action, result };
 }
 
diff --git a/test/unit/miner-chat-action-dispatch.test.ts b/test/unit/miner-chat-action-dispatch.test.ts
index f8df273c1b..a493ce63a7 100644
--- a/test/unit/miner-chat-action-dispatch.test.ts
+++ b/test/unit/miner-chat-action-dispatch.test.ts
@@ -147,4 +147,22 @@ describe("dispatchChatAction (#6519)", () => {
     const result = await dispatchChatAction({ action: "demo", params: {} }, { env: enabledEnv, registry });
     expect(result).toEqual({ ok: false, status: "invalid_params", action: "demo", error: "boom" });
   });
+
+  it("fails closed with handler_error when the handler throws, not an unhandled rejection (#6989)", async () => {
+    const registry = registryWith("demo", () => true, () => {
+      throw new Error("network down");
+    });
+    const result = await dispatchChatAction({ action: "demo", params: {} }, { env: enabledEnv, registry });
+    // Typed result, distinct from invalid_params so a caller can tell an execution failure from a validation
+    // failure. The thrown value is deliberately not surfaced (it may carry external detail).
+    expect(result).toEqual({ ok: false, status: "handler_error", action: "demo" });
+  });
+
+  it("fails closed the same way regardless of what the handler throws (#6989)", async () => {
+    const registry = registryWith("demo", () => true, () => {
+      throw "kaboom";
+    });
+    const result = await dispatchChatAction({ action: "demo", params: {} }, { env: enabledEnv, registry });
+    expect(result).toEqual({ ok: false, status: "handler_error", action: "demo" });
+  });
 });