diff --git a/apps/loopover-ui/public/openapi.json b/apps/loopover-ui/public/openapi.json
index b05be15b6e..96ede94e11 100644
--- a/apps/loopover-ui/public/openapi.json
+++ b/apps/loopover-ui/public/openapi.json
@@ -19228,6 +19228,33 @@
           }
         ]
       }
+    },
+    "/v1/internal/jobs/agent-regate-pr": {
+      "post": {
+        "summary": "Force a re-gate of a specific pull request",
+        "responses": {
+          "202": {
+            "description": "Forced re-gate queued"
+          },
+          "400": {
+            "description": "Invalid repo/PR request"
+          },
+          "401": {
+            "description": "Invalid internal token"
+          },
+          "404": {
+            "description": "Pull request or repository not found"
+          }
+        },
+        "security": [
+          {
+            "LoopOverBearer": []
+          },
+          {
+            "LoopOverSessionCookie": []
+          }
+        ]
+      }
     }
   },
   "servers": [
diff --git a/src/api/routes.ts b/src/api/routes.ts
index c21cbe1199..94a02d197c 100644
--- a/src/api/routes.ts
+++ b/src/api/routes.ts
@@ -4830,6 +4830,30 @@ export function createApp() {
     return c.json(await backfillOpenPullRequestDetails(c.env, { repoFullName: body.repoFullName, mode, ...(Number.isFinite(Number(body?.cursor)) ? { cursor: Number(body.cursor) } : {}) }));
   });
 
+  // #8898: the first real producer for agent-regate-pr's `force` field (src/types.ts) -- every other
+  // producer re-gates automatically and never forces a cache bypass. This lets an operator force a
+  // fresh AI opinion on one specific PR instead of reusing a recent (possibly disputed) result.
+  app.post("/v1/internal/jobs/agent-regate-pr", async (c) => {
+    const body = await c.req.json().catch(() => ({}));
+    if (typeof body?.repoFullName !== "string" || body.repoFullName.length === 0) return c.json({ error: "repo_full_name_required" }, 400);
+    if (typeof body?.prNumber !== "number" || !Number.isInteger(body.prNumber) || body.prNumber <= 0) return c.json({ error: "pr_number_required" }, 400);
+    const pullRequest = await getPullRequest(c.env, body.repoFullName, body.prNumber);
+    if (!pullRequest) return c.json({ error: "pull_request_not_found" }, 404);
+    const repo = await getRepository(c.env, body.repoFullName);
+    if (!repo || typeof repo.installationId !== "number") return c.json({ error: "repo_not_found" }, 404);
+    const message: JobMessage = {
+      type: "agent-regate-pr",
+      deliveryId: `manual-regate:${body.repoFullName}#${body.prNumber}:${crypto.randomUUID()}`,
+      repoFullName: body.repoFullName,
+      prNumber: body.prNumber,
+      installationId: repo.installationId,
+      force: true,
+      ...(pullRequest.createdAt ? { prCreatedAt: pullRequest.createdAt } : {}),
+    };
+    await c.env.JOBS.send(message);
+    return c.json({ ok: true, status: "queued", repoFullName: body.repoFullName, prNumber: body.prNumber, force: true }, 202);
+  });
+
   app.post("/v1/internal/jobs/refresh-scoring-model", async (c) => {
     const message: JobMessage = { type: "refresh-scoring-model", requestedBy: "api" };
     await c.env.JOBS.send(message);
diff --git a/src/openapi/spec.ts b/src/openapi/spec.ts
index 5c53eb4c4a..955afd4822 100644
--- a/src/openapi/spec.ts
+++ b/src/openapi/spec.ts
@@ -1312,6 +1312,17 @@ export function buildOpenApiSpec() {
       401: { description: "Invalid internal token" },
     },
   });
+  registry.registerPath({
+    method: "post",
+    path: "/v1/internal/jobs/agent-regate-pr",
+    summary: "Force a re-gate of a specific pull request",
+    responses: {
+      202: { description: "Forced re-gate queued" },
+      400: { description: "Invalid repo/PR request" },
+      404: { description: "Pull request or repository not found" },
+      401: { description: "Invalid internal token" },
+    },
+  });
   registry.registerPath({
     method: "post",
     path: "/v1/internal/jobs/generate-review-recap",
diff --git a/src/types.ts b/src/types.ts
index c62cd2de1c..d3f05901ab 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -31,9 +31,11 @@ export type JobMessage =
       // (#audit-sweep-fanout, deliveryId prefixed "regate-sweep:" — genuinely deferrable maintenance) and the
       // sweep's own outage-repair fan-out (deliveryId prefixed "regate-repair:" — a PR missing a current-head
       // Gate check or public-surface publish); a trailing coalesced re-review after a webhook burst; an
-      // over-cap sibling wake; a linked-issue-change re-review. EXCEPT for the "regate-sweep:" prefix, every
-      // producer carries the real webhook/event deliveryId that caused it — current-HEAD contributor-PR-review
-      // work, never background maintenance (isScheduledRegateSweepJob / githubRateLimitAdmissionTargetForJob in
+      // over-cap sibling wake; a linked-issue-change re-review; an operator-forced re-gate via
+      // POST /v1/internal/jobs/agent-regate-pr (deliveryId prefixed "manual-regate:" — #8898, no real
+      // webhook/event to carry forward). EXCEPT for the "regate-sweep:" prefix, every producer carries the
+      // real webhook/event deliveryId that caused it — current-HEAD contributor-PR-review work, never
+      // background maintenance (isScheduledRegateSweepJob / githubRateLimitAdmissionTargetForJob in
       // ../selfhost/queue-common.ts, #selfhost-queue-liveness).
       type: "agent-regate-pr";
       deliveryId: string;
diff --git a/test/integration/api.test.ts b/test/integration/api.test.ts
index 4dd61c511e..797b5645e1 100644
--- a/test/integration/api.test.ts
+++ b/test/integration/api.test.ts
@@ -4415,6 +4415,31 @@ describe("api routes", () => {
     expect(sent).toEqual(expect.arrayContaining([expect.objectContaining({ message: expect.objectContaining({ type: "backfill-pr-details", installationId: 654, cursor: 5 }) })]));
     expect((await app.request("/v1/internal/jobs/backfill-pr-details/run", { method: "POST", headers: internalHeaders, body: "{}" }, env)).status).toBe(400);
 
+    // #8898: force-regate route -- validation, not-found, and success branches.
+    expect((await app.request("/v1/internal/jobs/agent-regate-pr", { method: "POST", headers: internalHeaders, body: "{}" }, env)).status).toBe(400);
+    expect((await app.request("/v1/internal/jobs/agent-regate-pr", { method: "POST", headers: internalHeaders, body: JSON.stringify({ repoFullName: "owner/repo" }) }, env)).status).toBe(400);
+    expect((await app.request("/v1/internal/jobs/agent-regate-pr", { method: "POST", headers: internalHeaders, body: JSON.stringify({ repoFullName: "owner/repo", prNumber: 404 }) }, env)).status).toBe(404);
+    expect((await app.request("/v1/internal/jobs/agent-regate-pr", { method: "POST", headers: internalHeaders, body: JSON.stringify({ repoFullName: "owner/other-missing", prNumber: 9 }) }, env)).status).toBe(404);
+    // PR row exists but its repo was never registered (e.g. uninstalled after sync) -- distinct 404 branch.
+    await upsertPullRequestFromGitHub(env, "owner/unregistered", { number: 1, title: "Orphan PR", state: "open", created_at: "2026-06-01T00:00:00Z", labels: [] });
+    expect((await app.request("/v1/internal/jobs/agent-regate-pr", { method: "POST", headers: internalHeaders, body: JSON.stringify({ repoFullName: "owner/unregistered", prNumber: 1 }) }, env)).status).toBe(404);
+    await upsertPullRequestFromGitHub(env, "owner/repo", { number: 9, title: "Test PR", state: "open", created_at: "2026-06-01T00:00:00Z", labels: [] });
+    const queuedRegate = await app.request(
+      "/v1/internal/jobs/agent-regate-pr",
+      { method: "POST", headers: internalHeaders, body: JSON.stringify({ repoFullName: "owner/repo", prNumber: 9 }) },
+      env,
+    );
+    expect(queuedRegate.status).toBe(202);
+    await expect(queuedRegate.json()).resolves.toMatchObject({ ok: true, status: "queued", repoFullName: "owner/repo", prNumber: 9, force: true });
+    expect(sent).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          message: expect.objectContaining({ type: "agent-regate-pr", repoFullName: "owner/repo", prNumber: 9, installationId: 654, force: true, prCreatedAt: "2026-06-01T00:00:00Z" }),
+        }),
+      ]),
+    );
+    expect((await app.request("/v1/internal/jobs/agent-regate-pr", { method: "POST", body: JSON.stringify({ repoFullName: "owner/repo", prNumber: 9 }) }, env)).status).toBe(401);
+
     expect((await app.request("/v1/internal/jobs/build-contributor-decision-packs/run", { method: "POST", headers: internalHeaders, body: "{}" }, env)).status).toBe(400);
     expect((await app.request("/v1/internal/jobs/refresh-contributor-activity", { method: "POST", headers: internalHeaders, body: "{}" }, env)).status).toBe(400);
     const queuedContributorRefresh = await app.request(