diff --git a/src/tools/news.tools.ts b/src/tools/news.tools.ts
index 6d0e10a9..ff4ebf07 100644
--- a/src/tools/news.tools.ts
+++ b/src/tools/news.tools.ts
@@ -877,6 +877,10 @@ be a registered editor for the signal's beat, or the beat's publisher.
 
 When rejecting, feedback is required to explain why.
 
+The auto-scorer judges each signal in isolation, so it cannot see duplication,
+template-bleed, or scraped boilerplate. Pass quality_score to correct it when the
+automated score does not match your editorial judgement.
+
 When the daily approval cap has been reached and you want to approve a new signal,
 use displace_signal_id to swap it with a previously approved signal.
 
@@ -896,9 +900,22 @@ Authenticated via BIP-322 signature.`,
           .string()
           .optional()
           .describe("ID of a previously approved signal to displace when at daily cap"),
+        quality_score: z
+          .number()
+          .int()
+          .min(0)
+          .max(100)
+          .optional()
+          .describe(
+            "Integer 0-100. Overrides the auto-scorer's quality_score on this signal. " +
+              "Use when the automated score does not reflect the editorial judgement " +
+              "(e.g. rejecting a well-sourced but duplicate or templated filing that " +
+              "scored highly). The original score is preserved in score_breakdown.override " +
+              "for audit."
+          ),
       },
     },
-    async ({ signal_id, status, feedback, displace_signal_id }) => {
+    async ({ signal_id, status, feedback, displace_signal_id, quality_score }) => {
       try {
         const account = await getAccount();
 
@@ -925,6 +942,13 @@ Authenticated via BIP-322 signature.`,
         if (displace_signal_id) {
           payload.displace_signal_id = displace_signal_id;
         }
+        // Explicit undefined check: 0 is a valid score and would be dropped by a
+        // truthiness test. Omitting the field leaves the API's no-override path.
+        // Covered by tests/tools/news-editor-review-signal.test.ts — the 0 case
+        // fails if this is refactored to `if (quality_score)`.
+        if (quality_score !== undefined) {
+          payload.quality_score = quality_score;
+        }
 
         const res = await fetch(`${NEWS_BASE}/signals/${signal_id}/review`, {
           method: "PATCH",
diff --git a/tests/tools/news-editor-review-signal.test.ts b/tests/tools/news-editor-review-signal.test.ts
new file mode 100644
index 00000000..be4dc132
--- /dev/null
+++ b/tests/tools/news-editor-review-signal.test.ts
@@ -0,0 +1,145 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const mockGetAccount = vi.fn();
+
+vi.mock("../../src/services/x402.service.js", () => ({
+  getAccount: mockGetAccount,
+  NETWORK: "mainnet",
+}));
+
+vi.mock("../../src/services/sbtc.service.js", () => ({
+  getSbtcService: vi.fn(() => ({ getBalance: vi.fn() })),
+}));
+
+vi.mock("../../src/services/hiro-api.js", () => ({
+  getHiroApi: vi.fn(() => ({
+    getAccountInfo: vi.fn(),
+    getMempoolTransactions: vi.fn(),
+  })),
+}));
+
+vi.mock("../../src/services/nonce-tracker.js", () => ({
+  getTrackedNonce: vi.fn(),
+  recordNonceUsed: vi.fn(),
+  reconcileWithChain: vi.fn(),
+}));
+
+// bip322Sign is real crypto over the mocked key material; stub it so the test
+// asserts payload construction rather than re-testing the signer.
+vi.mock("../../src/utils/bip322.js", () => ({
+  bip322Sign: vi.fn(() => "mock-signature"),
+}));
+
+vi.mock("@scure/btc-signer", () => ({
+  p2wpkh: vi.fn(() => ({ script: new Uint8Array([0x00]) })),
+  NETWORK: {},
+  TEST_NETWORK: {},
+}));
+
+const { registerNewsTools } = await import("../../src/tools/news.tools.js");
+
+interface RegisteredTool {
+  handler: (args: Record<string, unknown>) => Promise<unknown>;
+}
+
+function createTrackingServer() {
+  const tools = new Map<string, RegisteredTool>();
+  const server = {
+    registerTool: vi.fn(
+      (
+        name: string,
+        _config: { description: string; inputSchema: unknown },
+        handler: RegisteredTool["handler"]
+      ) => {
+        tools.set(name, { handler });
+      }
+    ),
+  };
+  return { server, tools };
+}
+
+/**
+ * Registers the news tools, invokes news_editor_review_signal with `args`, and
+ * returns the JSON body that would have been PATCHed to /api/signals/:id/review.
+ */
+async function reviewPayload(
+  args: Record<string, unknown>
+): Promise<Record<string, unknown>> {
+  const { server, tools } = createTrackingServer();
+  registerNewsTools(server as never);
+  const tool = tools.get("news_editor_review_signal");
+  if (!tool) throw new Error("news_editor_review_signal was not registered");
+
+  const fetchMock = vi.fn(async () => ({
+    ok: true,
+    status: 200,
+    text: async () => JSON.stringify({ id: "sig_1", status: "rejected" }),
+  }));
+  vi.stubGlobal("fetch", fetchMock);
+
+  const result = (await tool.handler(args)) as { isError?: boolean };
+  if (result?.isError) {
+    throw new Error(
+      `handler errored: ${JSON.stringify((result as Record<string, unknown>).content)}`
+    );
+  }
+  if (fetchMock.mock.calls.length === 0) {
+    throw new Error("handler did not issue a request");
+  }
+
+  const [, init] = fetchMock.mock.calls[0] as unknown as [
+    string,
+    { body: string },
+  ];
+  return JSON.parse(init.body) as Record<string, unknown>;
+}
+
+describe("news_editor_review_signal quality_score override", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.unstubAllGlobals();
+    mockGetAccount.mockResolvedValue({
+      address: "SP000000000000000000002Q6VF78",
+      btcAddress: "bc1qeditor000000000000000000000000000000",
+      btcPrivateKey: new Uint8Array(32).fill(1),
+      btcPublicKey: new Uint8Array(33).fill(2),
+      privateKey: "0".repeat(64),
+      network: "mainnet",
+    });
+  });
+
+  it("forwards an editor-supplied quality_score", async () => {
+    const payload = await reviewPayload({
+      signal_id: "sig_1",
+      status: "rejected",
+      feedback: "duplicate refile",
+      quality_score: 15,
+    });
+
+    expect(payload.quality_score).toBe(15);
+  });
+
+  // The #810 case: fabricated sources score 0. A truthiness guard
+  // (`if (quality_score)`) drops it silently and the override becomes a no-op,
+  // so this asserts the most severe correction an editor can make survives.
+  it("forwards quality_score 0 rather than dropping it as falsy", async () => {
+    const payload = await reviewPayload({
+      signal_id: "sig_2",
+      status: "rejected",
+      feedback: "fabricated sources",
+      quality_score: 0,
+    });
+
+    expect(payload).toHaveProperty("quality_score");
+    expect(payload.quality_score).toBe(0);
+  });
+
+  it("omits quality_score entirely when not supplied", async () => {
+    const payload = await reviewPayload({
+      signal_id: "sig_3",
+      status: "approved",
+    });
+
+    expect(payload).not.toHaveProperty("quality_score");
+  });
+});