diff --git a/packages/gittensory-miner/lib/portfolio-discovery.d.ts b/packages/gittensory-miner/lib/portfolio-discovery.d.ts
new file mode 100644
index 0000000000..bed57cb072
--- /dev/null
+++ b/packages/gittensory-miner/lib/portfolio-discovery.d.ts
@@ -0,0 +1,28 @@
+import type { EventLedger } from "./event-ledger.js";
+import type { PortfolioQueueStore } from "./portfolio-queue.js";
+
+export type EnqueueRankedDiscoveryInput = {
+  repoFullName: string;
+  issueNumber: number;
+  title: string;
+  labels?: string[];
+  rankScore: number;
+};
+
+export type EnqueueRankedDiscoveryOptions = {
+  queueStore: PortfolioQueueStore;
+  eventLedger?: EventLedger;
+  minRankScore?: number | null;
+};
+
+export type EnqueueRankedDiscoverySummary = {
+  enqueued: number;
+  skippedBelowMinRank: number;
+  skippedInvalid: number;
+  eventsAppended: number;
+};
+
+export function enqueueRankedDiscovery(
+  rankedIssues: readonly EnqueueRankedDiscoveryInput[],
+  options: EnqueueRankedDiscoveryOptions,
+): EnqueueRankedDiscoverySummary;
diff --git a/packages/gittensory-miner/lib/portfolio-discovery.js b/packages/gittensory-miner/lib/portfolio-discovery.js
new file mode 100644
index 0000000000..89abca883a
--- /dev/null
+++ b/packages/gittensory-miner/lib/portfolio-discovery.js
@@ -0,0 +1,95 @@
+/** Local orchestration: materialize ranked fan-out rows into the portfolio queue (#2292). */
+
+function normalizeMinRankScore(minRankScore) {
+  if (minRankScore === undefined || minRankScore === null) return 0;
+  if (typeof minRankScore !== "number" || !Number.isFinite(minRankScore) || minRankScore < 0) {
+    throw new Error("invalid_min_rank_score");
+  }
+  return minRankScore;
+}
+
+function normalizeRankedIssue(issue) {
+  if (!issue || typeof issue !== "object") return null;
+  const repoFullName = typeof issue.repoFullName === "string" ? issue.repoFullName.trim() : "";
+  const [owner, repo, extra] = repoFullName.split("/");
+  if (!owner || !repo || extra !== undefined) return null;
+  if (!Number.isInteger(issue.issueNumber) || issue.issueNumber <= 0) return null;
+  if (typeof issue.rankScore !== "number" || !Number.isFinite(issue.rankScore) || issue.rankScore < 0) {
+    return null;
+  }
+  const title = typeof issue.title === "string" ? issue.title.trim() : "";
+  if (!title) return null;
+  const labels = Array.isArray(issue.labels)
+    ? issue.labels.filter((label) => typeof label === "string" && label.trim()).map((label) => label.trim())
+    : [];
+  return {
+    repoFullName: `${owner}/${repo}`,
+    issueNumber: issue.issueNumber,
+    title,
+    labels,
+    rankScore: issue.rankScore,
+  };
+}
+
+/**
+ * Enqueue ranked discovery rows into the local portfolio backlog. Uses each row's `rankScore` as queue priority
+ * (the #2292 placeholder field). Optionally appends `discovered_issue` audit events when an event ledger is supplied.
+ * Never calls GitHub — callers rank locally first via `rankCandidateIssues`.
+ */
+export function enqueueRankedDiscovery(rankedIssues, options = {}) {
+  if (!Array.isArray(rankedIssues)) throw new Error("invalid_ranked_issues");
+  const queueStore = options.queueStore;
+  if (!queueStore || typeof queueStore.enqueue !== "function") throw new Error("invalid_queue_store");
+
+  let eventLedger = null;
+  if (options.eventLedger !== undefined) {
+    eventLedger = options.eventLedger;
+    if (!eventLedger || typeof eventLedger.appendEvent !== "function") {
+      throw new Error("invalid_event_ledger");
+    }
+  }
+
+  const minRankScore = normalizeMinRankScore(options.minRankScore);
+
+  const summary = {
+    enqueued: 0,
+    skippedBelowMinRank: 0,
+    skippedInvalid: 0,
+    eventsAppended: 0,
+  };
+
+  for (const issue of rankedIssues) {
+    const normalized = normalizeRankedIssue(issue);
+    if (!normalized) {
+      summary.skippedInvalid += 1;
+      continue;
+    }
+    if (normalized.rankScore < minRankScore) {
+      summary.skippedBelowMinRank += 1;
+      continue;
+    }
+
+    queueStore.enqueue({
+      repoFullName: normalized.repoFullName,
+      identifier: `issue:${normalized.issueNumber}`,
+      priority: normalized.rankScore,
+    });
+    summary.enqueued += 1;
+
+    if (eventLedger) {
+      eventLedger.appendEvent({
+        type: "discovered_issue",
+        repoFullName: normalized.repoFullName,
+        payload: {
+          issueNumber: normalized.issueNumber,
+          rankScore: normalized.rankScore,
+          title: normalized.title,
+          labels: normalized.labels,
+        },
+      });
+      summary.eventsAppended += 1;
+    }
+  }
+
+  return summary;
+}
diff --git a/packages/gittensory-miner/package.json b/packages/gittensory-miner/package.json
index f2aa9fe4d8..922b022f79 100644
--- a/packages/gittensory-miner/package.json
+++ b/packages/gittensory-miner/package.json
@@ -31,7 +31,7 @@
     "lib"
   ],
   "scripts": {
-    "build": "node --check bin/gittensory-miner.js && node --check lib/cli.js && node --check lib/deny-check.js && node --check lib/run-state-cli.js && node --check lib/update-check.js && node --check lib/opportunity-fanout.js && node --check lib/ci-poller.js && node --check lib/run-state.js && node --check lib/deny-hooks.js && node --check lib/event-ledger.js && node --check lib/claim-ledger.js && node --check lib/claim-ledger-expiry.js && node --check lib/portfolio-queue.js && node --check lib/opportunity-ranker.js && node --check lib/plan-store.js && node --check lib/rejection-templates.js && node --check lib/governor-ledger.js && node --check lib/manage-status.js && node --check lib/status.js"
+    "build": "node --check bin/gittensory-miner.js && node --check lib/cli.js && node --check lib/deny-check.js && node --check lib/run-state-cli.js && node --check lib/update-check.js && node --check lib/opportunity-fanout.js && node --check lib/ci-poller.js && node --check lib/run-state.js && node --check lib/deny-hooks.js && node --check lib/event-ledger.js && node --check lib/claim-ledger.js && node --check lib/claim-ledger-expiry.js && node --check lib/portfolio-queue.js && node --check lib/portfolio-discovery.js && node --check lib/opportunity-ranker.js && node --check lib/plan-store.js && node --check lib/rejection-templates.js && node --check lib/governor-ledger.js && node --check lib/manage-status.js && node --check lib/status.js"
   },
   "dependencies": {
     "@jsonbored/gittensory-engine": "0.1.0"
diff --git a/test/unit/miner-portfolio-discovery.test.ts b/test/unit/miner-portfolio-discovery.test.ts
new file mode 100644
index 0000000000..0bb2e7c2cc
--- /dev/null
+++ b/test/unit/miner-portfolio-discovery.test.ts
@@ -0,0 +1,186 @@
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import {
+  closeDefaultEventLedger,
+  initEventLedger,
+} from "../../packages/gittensory-miner/lib/event-ledger.js";
+import { enqueueRankedDiscovery } from "../../packages/gittensory-miner/lib/portfolio-discovery.js";
+import type { EnqueueRankedDiscoveryInput } from "../../packages/gittensory-miner/lib/portfolio-discovery.d.ts";
+import {
+  closeDefaultPortfolioQueueStore,
+  initPortfolioQueueStore,
+} from "../../packages/gittensory-miner/lib/portfolio-queue.js";
+
+const roots: string[] = [];
+const stores: Array<{ close(): void }> = [];
+
+function tempQueueStore() {
+  const root = mkdtempSync(join(tmpdir(), "gittensory-miner-portfolio-discovery-"));
+  roots.push(root);
+  const store = initPortfolioQueueStore(join(root, "portfolio-queue.sqlite3"));
+  stores.push(store);
+  return store;
+}
+
+function tempEventLedger() {
+  const root = mkdtempSync(join(tmpdir(), "gittensory-miner-portfolio-discovery-ledger-"));
+  roots.push(root);
+  const ledger = initEventLedger(join(root, "event-ledger.sqlite3"));
+  stores.push(ledger);
+  return ledger;
+}
+
+function rankedIssue(overrides: Partial<EnqueueRankedDiscoveryInput> = {}): EnqueueRankedDiscoveryInput {
+  return {
+    repoFullName: "acme/widgets",
+    issueNumber: 42,
+    title: "Add queue retry helper",
+    labels: ["help wanted"],
+    rankScore: 50,
+    ...overrides,
+  };
+}
+
+afterEach(() => {
+  for (const store of stores.splice(0)) store.close();
+  closeDefaultPortfolioQueueStore();
+  closeDefaultEventLedger();
+  for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true });
+});
+
+describe("gittensory-miner portfolio discovery (#2292)", () => {
+  it("returns a zero summary for empty input without touching the queue", () => {
+    const queueStore = tempQueueStore();
+    expect(enqueueRankedDiscovery([], { queueStore })).toEqual({
+      enqueued: 0,
+      skippedBelowMinRank: 0,
+      skippedInvalid: 0,
+      eventsAppended: 0,
+    });
+    expect(queueStore.listQueue()).toEqual([]);
+  });
+
+  it("enqueues ranked rows using rankScore as portfolio priority", () => {
+    const queueStore = tempQueueStore();
+    const summary = enqueueRankedDiscovery(
+      [
+        rankedIssue({ issueNumber: 1, rankScore: 10 }),
+        rankedIssue({ issueNumber: 2, rankScore: 90 }),
+        rankedIssue({ issueNumber: 3, rankScore: 40 }),
+      ],
+      { queueStore },
+    );
+    expect(summary).toEqual({
+      enqueued: 3,
+      skippedBelowMinRank: 0,
+      skippedInvalid: 0,
+      eventsAppended: 0,
+    });
+    expect(queueStore.dequeueNext()?.identifier).toBe("issue:2");
+    expect(queueStore.dequeueNext()?.identifier).toBe("issue:3");
+    expect(queueStore.dequeueNext()?.identifier).toBe("issue:1");
+  });
+
+  it("skips rows below minRankScore without enqueueing them", () => {
+    const queueStore = tempQueueStore();
+    const summary = enqueueRankedDiscovery(
+      [
+        rankedIssue({ issueNumber: 1, rankScore: 5 }),
+        rankedIssue({ issueNumber: 2, rankScore: 25 }),
+      ],
+      { queueStore, minRankScore: 20 },
+    );
+    expect(summary).toEqual({
+      enqueued: 1,
+      skippedBelowMinRank: 1,
+      skippedInvalid: 0,
+      eventsAppended: 0,
+    });
+    expect(queueStore.listQueue().map((entry) => entry.identifier)).toEqual(["issue:2"]);
+  });
+
+  it("skips malformed ranked rows instead of throwing", () => {
+    const queueStore = tempQueueStore();
+    const summary = enqueueRankedDiscovery(
+      [
+        rankedIssue({ issueNumber: 1, rankScore: 30 }),
+        { repoFullName: "bad", issueNumber: 2, title: "x", rankScore: 40 },
+        rankedIssue({ issueNumber: 3, title: "", rankScore: 50 }),
+      ] as EnqueueRankedDiscoveryInput[],
+      { queueStore },
+    );
+    expect(summary).toEqual({
+      enqueued: 1,
+      skippedBelowMinRank: 0,
+      skippedInvalid: 2,
+      eventsAppended: 0,
+    });
+    expect(queueStore.listQueue()[0]?.identifier).toBe("issue:1");
+  });
+
+  it("refreshes priority for done items but leaves in_progress rows unchanged", () => {
+    const queueStore = tempQueueStore();
+    enqueueRankedDiscovery([rankedIssue({ issueNumber: 7, rankScore: 10 })], { queueStore });
+    expect(queueStore.dequeueNext()).toMatchObject({ identifier: "issue:7", status: "in_progress", priority: 10 });
+
+    enqueueRankedDiscovery([rankedIssue({ issueNumber: 8, rankScore: 5 })], { queueStore });
+    queueStore.markDone("acme/widgets", "issue:8");
+
+    enqueueRankedDiscovery(
+      [
+        rankedIssue({ issueNumber: 7, rankScore: 99 }),
+        rankedIssue({ issueNumber: 8, rankScore: 88 }),
+      ],
+      { queueStore },
+    );
+
+    expect(queueStore.listQueue("acme/widgets").find((entry) => entry.identifier === "issue:7")).toMatchObject({
+      status: "in_progress",
+      priority: 10,
+    });
+    expect(queueStore.listQueue("acme/widgets").find((entry) => entry.identifier === "issue:8")).toMatchObject({
+      status: "queued",
+      priority: 88,
+    });
+  });
+
+  it("appends discovered_issue audit events when an event ledger is supplied", () => {
+    const queueStore = tempQueueStore();
+    const eventLedger = tempEventLedger();
+    const summary = enqueueRankedDiscovery([rankedIssue({ issueNumber: 12, rankScore: 33 })], {
+      queueStore,
+      eventLedger,
+    });
+    expect(summary.eventsAppended).toBe(1);
+    expect(eventLedger.readEvents()).toEqual([
+      expect.objectContaining({
+        seq: 1,
+        type: "discovered_issue",
+        repoFullName: "acme/widgets",
+        payload: {
+          issueNumber: 12,
+          rankScore: 33,
+          title: "Add queue retry helper",
+          labels: ["help wanted"],
+        },
+      }),
+    ]);
+  });
+
+  it("rejects invalid rankedIssues, queue store, event ledger, or minRankScore", () => {
+    const queueStore = tempQueueStore();
+    expect(() => enqueueRankedDiscovery(null as never, { queueStore })).toThrow("invalid_ranked_issues");
+    expect(() => enqueueRankedDiscovery([], { queueStore: null as never })).toThrow("invalid_queue_store");
+    expect(() =>
+      enqueueRankedDiscovery([], { queueStore, eventLedger: null as never }),
+    ).toThrow("invalid_event_ledger");
+    expect(() =>
+      enqueueRankedDiscovery([], { queueStore, eventLedger: {} as never }),
+    ).toThrow("invalid_event_ledger");
+    expect(() =>
+      enqueueRankedDiscovery([], { queueStore, minRankScore: Number.NaN }),
+    ).toThrow("invalid_min_rank_score");
+  });
+});