fix(gmail-sync): replace in:inbox with -in:sent -in:drafts

in:inbox matches only messages currently in the Inbox, so it silently
excluded archived mail and everything routed past the inbox by a
label-and-archive filter - exactly the mail matched by the job-search
label Step 3.1 hunts for. The stated intent ("skip sent/drafts") is what
the negative operators express. Failure mode was silent under-detection
that read as "no updates" and left the tracker stale. Review finding F18
(2026-08-19).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/test_gmail_sync_command.py

@@ -0,0 +1,43 @@
+"""Guards for /gmail-sync's Gmail query semantics.
+
+The command's stated intent is "skip sent/drafts - status signals come
+from what employers send you". `in:inbox` does not mean that: it matches
+only messages currently IN the inbox, so it also excludes every archived
+message - and, self-defeatingly, the mail matched by the very
+job-search label Step 3.1 hunts for, because the standard filter that
+applies such a label also archives ("skip the inbox"). The correct
+operators for the stated intent are `-in:sent -in:drafts` (review
+finding F18, 2026-08-19). The failure mode is silent under-detection: a
+missed rejection or interview invite just looks like "no updates".
+"""
+import unittest
+from pathlib import Path
+
+REPO = Path(__file__).resolve().parent.parent
+GMAIL_SYNC = REPO / ".claude" / "commands" / "gmail-sync.md"
+
+
+class TestGmailQueryOperators(unittest.TestCase):
+    def setUp(self):
+        self.text = GMAIL_SYNC.read_text(encoding="utf-8")
+
+    def test_query_excludes_sent_and_drafts_explicitly(self):
+        self.assertIn(
+            "-in:sent -in:drafts",
+            self.text,
+            "the query must exclude sent/drafts with negative operators, "
+            "which keep archived and label-filtered mail in scope",
+        )
+
+    def test_query_never_restricts_to_the_inbox(self):
+        self.assertNotIn(
+            "in:inbox",
+            self.text.replace("-in:sent", "").replace("-in:drafts", ""),
+            "in:inbox silently drops archived mail and everything a "
+            "label-and-archive filter routed past the inbox - exactly the "
+            "mail the label search in Step 3.1 exists to find",
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()