diff --git a/.github/workflows/validation-no-codeql.yml b/.github/workflows/validation-no-codeql.yml
index d5fed90..775af29 100644
--- a/.github/workflows/validation-no-codeql.yml
+++ b/.github/workflows/validation-no-codeql.yml
@@ -75,6 +75,16 @@ on:
         required: false
         type: string
         default: task-result
+      e2e-shard-list:
+        description: Comma-separated E2E shard indices passed to the test lane's matrix, e.g. "1,2".
+        required: false
+        type: string
+        default: '1'
+      e2e-total-shards:
+        description: Total E2E shard count passed to the repository script as E2E_TOTAL_SHARDS.
+        required: false
+        type: string
+        default: '1'
     secrets:
       TURBO_TOKEN:
         required: false
@@ -119,6 +129,8 @@ jobs:
       # smoke, and performance lanes stay in the audit and scheduled lanes.
       unit-only: ${{ inputs.mode == 'fast' || inputs.mode == 'release' }}
       artifact-prefix: ${{ inputs.artifact-prefix }}
+      e2e-shard-list: ${{ inputs.e2e-shard-list }}
+      e2e-total-shards: ${{ inputs.e2e-total-shards }}
     secrets:
       TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
 
diff --git a/test/task-receipt-artifacts.test.mjs b/test/task-receipt-artifacts.test.mjs
index 1b5e8f2..a45fbcd 100644
--- a/test/task-receipt-artifacts.test.mjs
+++ b/test/task-receipt-artifacts.test.mjs
@@ -147,3 +147,18 @@ test('actual optional discovery writes an explicit skip receipt at the exact upl
   assert.equal(report.task, 'e2e')
   assert.deepEqual(report.commands, [])
 })
+
+test('validation orchestrators declare and forward the e2e shard inputs', () => {
+  for (const file of ['validation.yml', 'validation-no-codeql.yml']) {
+    const source = readFileSync(join(root, '.github/workflows', file), 'utf8')
+    for (const name of ['e2e-shard-list', 'e2e-total-shards']) {
+      assert.match(
+        source,
+        new RegExp(`^      ${name}:\\n(?:[^\\n]*\\n){3}        default: '1'`, 'm'),
+        `${file} must declare ${name}: rendered callers always pass it, and an undeclared reusable input fails the call at startup`
+      )
+      const testBlock = source.split('\n  test:\n')[1].split(/\n  [a-z0-9-]+:\n/)[0]
+      assert.match(testBlock, new RegExp(`${name}: \\$\\{\\{ inputs\\.${name} \\}\\}`))
+    }
+  }
+})