diff --git a/packages/loopover-miner/lib/attempt-runner.ts b/packages/loopover-miner/lib/attempt-runner.ts
index 50e9e3f484..76bec82313 100644
--- a/packages/loopover-miner/lib/attempt-runner.ts
+++ b/packages/loopover-miner/lib/attempt-runner.ts
@@ -57,6 +57,10 @@ export type AttemptInput = {
   maxConsecutiveGateBlocks?: number;
   draft?: boolean;
   governor: AttemptGovernorContext;
+  /** The forge host this attempt's own claim was recorded under (#5563 composite key). Omitted matches every
+   *  pre-existing single-forge caller: checkSubmissionFreshness resolves that the same way claim-ledger.js's
+   *  own normalizeApiBaseUrl does, to the github.com default. */
+  apiBaseUrl?: string;
 };
 
 export type AttemptDeps = {
@@ -233,7 +237,14 @@ export async function runMinerAttempt(input: AttemptInput, deps: AttemptDeps): P
   }
 
   const freshness = await checkSubmissionFreshness(
-    { repoFullName: input.loopInput.repoFullName, issueNumber: input.issueNumber, minerLogin: input.minerLogin },
+    {
+      repoFullName: input.loopInput.repoFullName,
+      issueNumber: input.issueNumber,
+      minerLogin: input.minerLogin,
+      // Spread-omit rather than pass `undefined` explicitly -- SubmissionFreshnessCandidate's `apiBaseUrl` is
+      // optional but not `| undefined` under exactOptionalPropertyTypes, same reasoning as maxConsecutiveGateBlocks below.
+      ...(input.apiBaseUrl !== undefined ? { apiBaseUrl: input.apiBaseUrl } : {}),
+    },
     { claimLedger: deps.claimLedger, fetchLiveIssueSnapshot: deps.fetchLiveIssueSnapshot, eventLedger: deps.eventLedger },
   );
   if (!freshness.fresh) {
diff --git a/packages/loopover-miner/lib/submission-freshness-check.ts b/packages/loopover-miner/lib/submission-freshness-check.ts
index 78d19be5fb..0eee7165b0 100644
--- a/packages/loopover-miner/lib/submission-freshness-check.ts
+++ b/packages/loopover-miner/lib/submission-freshness-check.ts
@@ -26,6 +26,7 @@
 // no noisy failure" here just means: return a quiet not-fresh result, same shape as any other blocked gate
 // decision in this package -- never throw, never surface anything to the target repo.
 
+import { DEFAULT_FORGE_CONFIG } from "./forge-config.js";
 import { defaultRetryBackoffMs } from "./http-retry.js";
 
 export const SUBMISSION_FRESHNESS_ABORT_EVENT = "submission_freshness_abort" as const;
@@ -36,6 +37,10 @@ export type SubmissionFreshnessCandidate = {
   repoFullName: string;
   issueNumber: number;
   minerLogin: string;
+  /** The forge host this attempt's claim was recorded under (#5563 composite key). Omitted/blank -> the
+   *  github.com default, matching claim-ledger.js's own normalizeApiBaseUrl, so every existing single-forge
+   *  caller resolves to the same host it always did. */
+  apiBaseUrl?: string;
 };
 
 export type LiveIssueSnapshot = {
@@ -44,7 +49,9 @@ export type LiveIssueSnapshot = {
 };
 
 export type SubmissionFreshnessClaimLedger = {
-  listClaims(filter: { repoFullName?: string; status?: string }): Array<{ repoFullName: string; issueNumber: number; status: string }>;
+  listClaims(
+    filter: { repoFullName?: string; status?: string },
+  ): Array<{ repoFullName: string; issueNumber: number; status: string; apiBaseUrl?: string }>;
 };
 
 export type SubmissionFreshnessEventLedger = {
@@ -71,6 +78,14 @@ export type SubmissionFreshnessRetryOptions = {
 const DEFAULT_SNAPSHOT_MAX_ATTEMPTS = 3;
 const defaultSnapshotSleep = (delayMs: number): Promise<void> => new Promise((resolve) => setTimeout(resolve, delayMs));
 
+/** The forge host a claim row or candidate belongs to. Mirrors manage-poll.js's resolveManagedRowApiBaseUrl (and
+ *  every store's normalizeApiBaseUrl): omitted/blank -> the github.com default, so a single-forge caller/row is
+ *  unaffected. Used only to COMPARE hosts here -- claim-ledger.js's own writer path still does the real
+ *  normalization/validation before a row is ever persisted. */
+function resolveFreshnessApiBaseUrl(apiBaseUrl: unknown): string {
+  return typeof apiBaseUrl === "string" && apiBaseUrl.trim() ? apiBaseUrl.trim() : DEFAULT_FORGE_CONFIG.apiBaseUrl;
+}
+
 /**
  * Evaluate whether a submission candidate's live repo state is still fresh enough to proceed toward open_pr.
  * Checks the miner's own claim-ledger status first (local, free) before spending a network round-trip on the
@@ -107,7 +122,13 @@ export async function checkSubmissionFreshness(
   const sleepFn = typeof options.sleepFn === "function" ? options.sleepFn : defaultSnapshotSleep;
   const backoffMs = typeof options.backoffMs === "function" ? options.backoffMs : defaultRetryBackoffMs;
 
-  const claim = claimLedger.listClaims({ repoFullName }).find((c) => c.issueNumber === candidate.issueNumber);
+  // Host-scoped match (#5563 composite key): a row belonging to a DIFFERENT forge host is ignored entirely --
+  // neither a pass nor a claim_superseded abort -- rather than winning on `.find`'s first-match-wins order
+  // regardless of which host recorded it.
+  const candidateApiBaseUrl = resolveFreshnessApiBaseUrl(candidate.apiBaseUrl);
+  const claim = claimLedger
+    .listClaims({ repoFullName })
+    .find((c) => c.issueNumber === candidate.issueNumber && resolveFreshnessApiBaseUrl(c.apiBaseUrl) === candidateApiBaseUrl);
   if (!claim || claim.status !== "active") {
     return abort(eventLedger, repoFullName, candidate.issueNumber, "claim_superseded");
   }
diff --git a/test/unit/miner-attempt-runner.test.ts b/test/unit/miner-attempt-runner.test.ts
index 37c70fb0a8..b5593629dd 100644
--- a/test/unit/miner-attempt-runner.test.ts
+++ b/test/unit/miner-attempt-runner.test.ts
@@ -281,6 +281,23 @@ describe("runMinerAttempt (#2337) — the real create->review->gate->submit pipe
     expect(result.reason).toBe("claim_superseded");
   });
 
+  it("REGRESSION (#10004): threads the attempt's own apiBaseUrl into the freshness candidate, so a forge.internal attempt matches its own host's active row instead of a released github.com row for the same issue", async () => {
+    const deps = baseDeps({
+      claimLedger: {
+        listClaims: () => [
+          // Lowest id, github.com, released -- this attempt is NOT on github.com, so an unthreaded (always
+          // github.com) candidate would wrongly match THIS row first and abort claim_superseded.
+          { repoFullName: "acme/widgets", issueNumber: 7, status: "released", apiBaseUrl: "https://api.github.com" },
+          // This attempt's OWN host and row -- must be the one matched once apiBaseUrl is actually threaded through.
+          { repoFullName: "acme/widgets", issueNumber: 7, status: "active", apiBaseUrl: "https://forge.internal" },
+        ],
+      },
+    });
+    const result = await runMinerAttempt(baseAttemptInput({ apiBaseUrl: "https://forge.internal" }), deps);
+
+    expect(result.outcome).toBe("submitted");
+  });
+
   it("blocked: the submission-gate itself declines (e.g. global kill-switch) before the governor ever runs", async () => {
     const deps = baseDeps();
     const result = await runMinerAttempt(baseAttemptInput({ killSwitchScope: "global" }), deps);
diff --git a/test/unit/miner-submission-freshness-check.test.ts b/test/unit/miner-submission-freshness-check.test.ts
index f7db8e2c58..b8d9afd104 100644
--- a/test/unit/miner-submission-freshness-check.test.ts
+++ b/test/unit/miner-submission-freshness-check.test.ts
@@ -1,8 +1,9 @@
 import { describe, expect, it, vi } from "vitest";
 
+import { DEFAULT_FORGE_CONFIG } from "../../packages/loopover-miner/lib/forge-config";
 import { checkSubmissionFreshness, SUBMISSION_FRESHNESS_ABORT_EVENT } from "../../packages/loopover-miner/lib/submission-freshness-check";
 
-function stubClaimLedger(claims: Array<{ repoFullName: string; issueNumber: number; status: string }> = []) {
+function stubClaimLedger(claims: Array<{ repoFullName: string; issueNumber: number; status: string; apiBaseUrl?: string }> = []) {
   const listClaims = vi.fn((filter: { repoFullName?: string; status?: string }) =>
     claims.filter((c) => (filter.repoFullName === undefined || c.repoFullName === filter.repoFullName) && (filter.status === undefined || c.status === filter.status)),
   );
@@ -64,6 +65,85 @@ describe("checkSubmissionFreshness (#3007)", () => {
     expect(fetchLiveIssueSnapshot).not.toHaveBeenCalled();
   });
 
+  describe("host-scoped claim match (#10004 -- the same owner/repo#issue can have one row per forge host)", () => {
+    const forgeInternal = "https://forge.internal";
+
+    it("REGRESSION: a released claim on another forge host does not abort this host's submission -- a released forge.internal row (lowest id) is ignored, and the active github.com row (no candidate apiBaseUrl) is matched instead", async () => {
+      const { claimLedger } = stubClaimLedger([
+        { repoFullName: "acme/widgets", issueNumber: 42, status: "released", apiBaseUrl: forgeInternal },
+        { repoFullName: "acme/widgets", issueNumber: 42, status: "active", apiBaseUrl: DEFAULT_FORGE_CONFIG.apiBaseUrl },
+      ]);
+      const { eventLedger, appendEvent } = stubEventLedger();
+      const fetchLiveIssueSnapshot = vi.fn(async () => ({ state: "open" as const, referencingPrs: [] }));
+
+      const result = await checkSubmissionFreshness(
+        { repoFullName: "acme/widgets", issueNumber: 42, minerLogin: "miner-bot" },
+        { claimLedger, fetchLiveIssueSnapshot, eventLedger },
+      );
+
+      expect(result).toEqual({ fresh: true });
+      expect(appendEvent).not.toHaveBeenCalled();
+    });
+
+    it("claim-superseded abort: only an active row on a DIFFERENT host exists -- the default-host candidate does not false-pass on it", async () => {
+      const { claimLedger } = stubClaimLedger([{ repoFullName: "acme/widgets", issueNumber: 42, status: "active", apiBaseUrl: forgeInternal }]);
+      const { eventLedger, appendEvent } = stubEventLedger();
+      const fetchLiveIssueSnapshot = vi.fn(async () => ({ state: "open" as const, referencingPrs: [] }));
+
+      const result = await checkSubmissionFreshness(
+        { repoFullName: "acme/widgets", issueNumber: 42, minerLogin: "miner-bot" },
+        { claimLedger, fetchLiveIssueSnapshot, eventLedger },
+      );
+
+      expect(result).toEqual({ fresh: false, reason: "claim_superseded" });
+      expect(fetchLiveIssueSnapshot).not.toHaveBeenCalled();
+      expect(appendEvent).toHaveBeenCalledWith({
+        type: SUBMISSION_FRESHNESS_ABORT_EVENT,
+        repoFullName: "acme/widgets",
+        payload: { issueNumber: 42, reason: "claim_superseded" },
+      });
+    });
+
+    it("a candidate with an explicit apiBaseUrl matches the row recorded under that same host", async () => {
+      const { claimLedger } = stubClaimLedger([{ repoFullName: "acme/widgets", issueNumber: 42, status: "active", apiBaseUrl: forgeInternal }]);
+      const { eventLedger } = stubEventLedger();
+      const fetchLiveIssueSnapshot = vi.fn(async () => ({ state: "open" as const, referencingPrs: [] }));
+
+      const result = await checkSubmissionFreshness(
+        { repoFullName: "acme/widgets", issueNumber: 42, minerLogin: "miner-bot", apiBaseUrl: forgeInternal },
+        { claimLedger, fetchLiveIssueSnapshot, eventLedger },
+      );
+
+      expect(result).toEqual({ fresh: true });
+    });
+
+    it("a candidate on the default host is unaffected by an unrelated row whose apiBaseUrl is blank (normalizes to the same default, not a distinct host)", async () => {
+      const { claimLedger } = stubClaimLedger([{ repoFullName: "acme/widgets", issueNumber: 42, status: "active", apiBaseUrl: "" }]);
+      const { eventLedger } = stubEventLedger();
+      const fetchLiveIssueSnapshot = vi.fn(async () => ({ state: "open" as const, referencingPrs: [] }));
+
+      const result = await checkSubmissionFreshness(
+        { repoFullName: "acme/widgets", issueNumber: 42, minerLogin: "miner-bot" },
+        { claimLedger, fetchLiveIssueSnapshot, eventLedger },
+      );
+
+      expect(result).toEqual({ fresh: true });
+    });
+
+    it("a candidate with a blank apiBaseUrl normalizes to the default host, matching a row with no apiBaseUrl at all", async () => {
+      const { claimLedger } = stubClaimLedger([{ repoFullName: "acme/widgets", issueNumber: 42, status: "active" }]);
+      const { eventLedger } = stubEventLedger();
+      const fetchLiveIssueSnapshot = vi.fn(async () => ({ state: "open" as const, referencingPrs: [] }));
+
+      const result = await checkSubmissionFreshness(
+        { repoFullName: "acme/widgets", issueNumber: 42, minerLogin: "miner-bot", apiBaseUrl: "   " },
+        { claimLedger, fetchLiveIssueSnapshot, eventLedger },
+      );
+
+      expect(result).toEqual({ fresh: true });
+    });
+  });
+
   it("issue-closed abort", async () => {
     const { claimLedger } = stubClaimLedger([activeClaim]);
     const { eventLedger, appendEvent } = stubEventLedger();