diff --git a/changelog.d/maintenance/12732-release-green-pack-gate-provenance.md b/changelog.d/maintenance/12732-release-green-pack-gate-provenance.md
new file mode 100644
index 0000000000..b582399352
--- /dev/null
+++ b/changelog.d/maintenance/12732-release-green-pack-gate-provenance.md
@@ -0,0 +1 @@
+- **fix(ci):** the release-green validator now runs its package-artifact gate the way `ci.yml` does — build, stamp `dist/BUILD_SHA`, then validate against the tree under test. `build:cli` never writes the stamp, so even with the provenance ref pointed at `HEAD` the gate could only ever report "dist/BUILD_SHA is missing" once the build itself compiled ([#12732](https://github.com/diegosouzapw/OmniRoute/issues/12732))
diff --git a/scripts/quality/validate-release-green.mjs b/scripts/quality/validate-release-green.mjs
index e5939214e2..d7d5143fa9 100644
--- a/scripts/quality/validate-release-green.mjs
+++ b/scripts/quality/validate-release-green.mjs
@@ -461,6 +461,37 @@ async function runAsync(cmd, cmdArgs, opts = {}) {
   }
 }
 
+/**
+ * Package-artifact gate, run the way ci.yml's pack job runs it (#10427).
+ *
+ * `check:pack-artifact` assembles dist/ through `build:cli` when staging is missing, and
+ * `build:cli` never writes dist/BUILD_SHA — only `build:release` does. Pointing the ref at
+ * HEAD (PACK_GATE_ENV) is not enough on its own: the guard still stops at "dist/BUILD_SHA is
+ * missing". ci.yml builds, stamps, then validates; mirror that order here. The guard is not
+ * relaxed: an unstamped dist/ or one built from another commit still fails.
+ */
+async function runPackArtifactGate(timeoutMs) {
+  const deadline = Date.now() + timeoutMs;
+  const steps = [
+    { cmd: npmCmd, args: ["run", "build:cli"] },
+    { cmd: process.execPath, args: ["scripts/build/write-build-sha.mjs"] },
+    {
+      cmd: npmCmd,
+      args: ["run", "check:pack-artifact"],
+      env: PACK_GATE_ENV,
+    },
+  ];
+  let out = "";
+  for (const step of steps) {
+    const remaining = deadline - Date.now();
+    if (remaining <= 0) return classifyRunError({ killed: true, signal: "SIGTERM" }, timeoutMs);
+    const result = await runAsync(step.cmd, step.args, { env: step.env, timeout: remaining });
+    out += result.out;
+    if (result.code !== 0) return { code: result.code, out };
+  }
+  return { code: 0, out };
+}
+
 async function main() {
   const args = new Set(process.argv.slice(2));
   const JSON_OUT = args.has("--json");
@@ -713,14 +744,15 @@ async function main() {
       slow.push({
         id: "pack-artifact",
         label: "Package artifact (npm pack policy)",
-        args: ["run", "check:pack-artifact"],
-        env: PACK_GATE_ENV,
+        run: runPackArtifactGate,
         timeout: 20 * 60 * 1000,
       });
     }
     slow.forEach((g) => announce(`${g.label} [parallel]`));
     const slowResults = await Promise.all(
-      slow.map((g) => runAsync(npmCmd, g.args, { timeout: g.timeout, env: g.env }))
+      slow.map((g) =>
+        g.run ? g.run(g.timeout) : runAsync(npmCmd, g.args, { timeout: g.timeout, env: g.env })
+      )
     );
     slow.forEach((g, i) => {
       const { code, out } = slowResults[i];
@@ -770,10 +802,7 @@ async function main() {
     }
   } else if (WITH_BUILD) {
     // --with-build without the suites (--quick): still verify the package artifact.
-    const { code, out } = await runAsync(npmCmd, ["run", "check:pack-artifact"], {
-      env: PACK_GATE_ENV,
-      timeout: 20 * 60 * 1000,
-    });
+    const { code, out } = await runPackArtifactGate(20 * 60 * 1000);
     saveGateLog("pack-artifact", out);
     record({
       id: "pack-artifact",
diff --git a/tests/unit/validate-release-green.test.ts b/tests/unit/validate-release-green.test.ts
index aae0570284..d116bf0722 100644
--- a/tests/unit/validate-release-green.test.ts
+++ b/tests/unit/validate-release-green.test.ts
@@ -277,6 +277,33 @@ test("pre-flight runs tarball boot only after the package artifact builder compl
   );
 });
 
+test("pack gate builds, stamps dist/BUILD_SHA, then validates against the tree under test (#10427)", async () => {
+  const fs = await import("node:fs");
+  const src = fs.readFileSync(
+    new URL("../../scripts/quality/validate-release-green.mjs", import.meta.url),
+    "utf8"
+  );
+  const gate = src.slice(src.indexOf("async function runPackArtifactGate"));
+  assert.ok(gate.length > 0, "the pack gate runner must exist");
+  const buildAt = gate.indexOf('"build:cli"');
+  const stampAt = gate.indexOf("scripts/build/write-build-sha.mjs");
+  const checkAt = gate.indexOf('"check:pack-artifact"');
+  // `build:cli` never writes dist/BUILD_SHA, so a bare `check:pack-artifact` always failed
+  // the provenance guard with "dist/BUILD_SHA is missing" — the same trap ci.yml avoids.
+  assert.ok(buildAt >= 0 && stampAt > buildAt, "BUILD_SHA must be stamped after build:cli");
+  assert.ok(checkAt > stampAt, "the artifact must be validated only after it is stamped");
+  assert.match(
+    gate.slice(checkAt, checkAt + 200),
+    /env: PACK_GATE_ENV/,
+    "a release-branch tip is never an ancestor of origin/main mid-cycle"
+  );
+  assert.match(src, /const PACK_GATE_ENV = \{ OMNIROUTE_RELEASE_REF: "HEAD" \}/);
+  // Both entry points (the parallel wave and --with-build --quick) must use it.
+  assert.equal(src.match(/runPackArtifactGate\b/g)?.length, 3);
+  assert.doesNotMatch(src, /runAsync\(npmCmd, \["run", "check:pack-artifact"\]/);
+  assert.doesNotMatch(src, /id: "pack-artifact",[^}]*args:/);
+});
+
 // ─── --full-ci gate extraction (P0, v3.8.46 post-mortem) ─────────────────────
 
 const CI_FIXTURE = `