diff --git a/contracts/flashstack-stx-core.clar b/contracts/flashstack-stx-core.clar
index e271a3c..67a65b7 100644
--- a/contracts/flashstack-stx-core.clar
+++ b/contracts/flashstack-stx-core.clar
@@ -196,4 +196,3 @@
 (define-read-only (get-admin)
   (ok (var-get admin))
 )
-
diff --git a/contracts/test/flashstack-stx-core.clar b/contracts/test/flashstack-stx-core.clar
index 3134f73..04b5ae8 100644
--- a/contracts/test/flashstack-stx-core.clar
+++ b/contracts/test/flashstack-stx-core.clar
@@ -196,4 +196,3 @@
 (define-read-only (get-admin)
   (ok (var-get admin))
 )
-
diff --git a/tests/deployed-source-pins.test.ts b/tests/deployed-source-pins.test.ts
index 7a50975..3ef0775 100644
--- a/tests/deployed-source-pins.test.ts
+++ b/tests/deployed-source-pins.test.ts
@@ -15,8 +15,18 @@ import { readFileSync } from "node:fs";
  * create drift from what is on chain. If a change is ever legitimate, it is a new
  * contract under a new name, not an edit to these files.
  *
- * Offline on purpose. To re-verify against the chain:
- *   curl -s https://api.hiro.so/v2/contracts/source/SP3TGRVG7DKGFVRTTVGGS60S59R916FWB4DAB9STZ/<name> \
+ * ajv.2.4 (axis 2 — repo copy vs deployed mainnet source): the same mechanism now
+ * also pins flashstack-stx-core and flashstack-sbtc-core, the two P0 live cores
+ * reviewed under ajv.4.3, checked byte-for-byte against SP20XD46NGAX05ZQZDKFYCCX49A3852BQABNP0VG5
+ * on 2026-10-01. A live-fetch CI job was deliberately not built — it would make the
+ * merge gate depend on a third-party API and network access, which needs its own
+ * decision (blocking gate vs scheduled job). This offline pin catches the same
+ * drift — any edit to these files — for zero network cost; re-running the curl
+ * below against mainnet is still how the pin itself gets re-verified.
+ *
+ * Offline on purpose. To re-verify against the chain (principal varies by pin,
+ * see each entry above):
+ *   curl -s https://api.hiro.so/v2/contracts/source/<principal>/<name> \
  *     | jq -j .source | shasum -a 256
  * (-j: no trailing newline; the API returns the source without one.)
  * *.clar is forced to LF by .gitattributes, so the hash is stable across checkouts.
@@ -24,19 +34,33 @@ import { readFileSync } from "node:fs";
 const PINS = [
   {
     file: "contracts/snp-flashstack-receiver.clar",
+    principal: "SP3TGRVG7DKGFVRTTVGGS60S59R916FWB4DAB9STZ",
     bytes: 3270,
     sha256: "0722955560dbd791d5c3a29c84e1787e4a250df88db5ece6d27be768a0b920ea",
   },
   {
     file: "contracts/snp-flashstack-receiver-v3.clar",
+    principal: "SP3TGRVG7DKGFVRTTVGGS60S59R916FWB4DAB9STZ",
     bytes: 5396,
     sha256: "2560814d0e0103d2e8fcb337fc560cdbc5c39215828b81606712ab82ffb3fdec",
   },
+  {
+    file: "contracts/flashstack-stx-core.clar",
+    principal: "SP20XD46NGAX05ZQZDKFYCCX49A3852BQABNP0VG5",
+    bytes: 6537,
+    sha256: "9fde1e3e330e16310d6aeae51baaa3acece0e4c6aad6368f7b80967cd36b517e",
+  },
+  {
+    file: "contracts/flashstack-sbtc-core.clar",
+    principal: "SP20XD46NGAX05ZQZDKFYCCX49A3852BQABNP0VG5",
+    bytes: 6801,
+    sha256: "f723d2bea72e62bece76d6f2ebe3d7d1a9de707176f41b7bc3b709e8e4f839af",
+  },
 ] as const;
 
 describe("verbatim copies of deployed contracts must not change", () => {
-  for (const { file, bytes, sha256 } of PINS) {
-    it(`${file} still matches the deployed source it was verified against`, () => {
+  for (const { file, principal, bytes, sha256 } of PINS) {
+    it(`${file} still matches the source deployed at ${principal}`, () => {
       const raw = readFileSync(file, "utf-8").replace(/\r\n/g, "\n");
       expect(Buffer.byteLength(raw), "size changed").toBe(bytes);
       expect(createHash("sha256").update(raw).digest("hex"), "content changed").toBe(sha256);