Spike: Facebook Page reached after the operator's Page click; scheduled post + photo created, read back byte-equal, deleted

Read phase passes (Page 1360018983863273, CREATE_CONTENT/MODERATE/ANALYZE, page token PAGE expires_at 0, three insights
metrics alive on v26.0). Write test: removal check accepts Meta's code-10 'Object does not exist' (fixed without a row,
4 tests); run 1 evidence kept. R-914 READY, R-915 narrowed to Live mode.

scripts/facebook/fb_probe.py

@@ -263,9 +263,20 @@ def hexs(s):
     return (s or "").encode("utf-8").hex()
 
 
+def gone_error(err):
+    """True when a GET's error says the object does not exist. MEASURED 2026-10-08 (v26.0, Page token): a deleted
+    scheduled post answers code 10 „(#10) Object does not exist, cannot be loaded due to missing permission…", not
+    code 100. Code 10 also means a missing permission, so callers count it only after the SAME token read the object
+    successfully before the DELETE (the readback is the control)."""
+    if not isinstance(err, dict):
+        return False
+    msg = err.get("message") or ""
+    return err.get("code") == 100 or (err.get("code") == 10 and "Object does not exist" in msg)
+
+
 def prove_removed(g, step, obj_id, ptok):
     c = g.call(step, "GET", obj_id, ptok, query={"fields": "id"})
-    gone = (not c.ok) and isinstance(c.err, dict) and c.err.get("code") == 100
+    gone = (not c.ok) and gone_error(c.err)
     log("   GET after DELETE %s: HTTP %s, removed=%s, error=%s"
         % (obj_id, c.status, gone, json.dumps(c.err, ensure_ascii=False)))
     return gone

scripts/facebook/test_fb_probe.py

@@ -67,5 +67,19 @@ class Redact(unittest.TestCase):
         self.assertEqual(fb_probe.redact(fb_probe.TEST_TEXT, secrets=[]), fb_probe.TEST_TEXT)
 
 
+class GoneError(unittest.TestCase):
+    def test_measured_code_10_does_not_exist(self):
+        self.assertTrue(fb_probe.gone_error({"code": 10, "message": "(#10) Object does not exist, cannot be loaded due to missing permission"}))
+
+    def test_code_100(self):
+        self.assertTrue(fb_probe.gone_error({"code": 100, "message": "Unsupported get request"}))
+
+    def test_other_code_10_is_not_removal(self):
+        self.assertFalse(fb_probe.gone_error({"code": 10, "message": "(#10) Application does not have permission"}))
+
+    def test_success_body_is_not_removal(self):
+        self.assertFalse(fb_probe.gone_error(None))
+
+
 if __name__ == "__main__":
     unittest.main()