fix(rank): handle UTF-8 BOM in tracker CSV headers (#485)

CHANGELOG.md

@@ -84,6 +84,14 @@ per-file diff commands.
 
 ### Fixed
 
+- **`/rank` tracker exclusion handles UTF-8 BOMs on reordered CSV headers**
+  (`tools/rank_state.py`, `tests/test_rank_state.py`) - when `company` or `role`
+  is the first column, a leading BOM becomes part of the header name and an
+  already-tracked application is selected for ranking again. Read with
+  `utf-8-sig` so both BOM-prefixed and plain UTF-8 trackers match correctly.
+  The standard `date`-first header already worked; regression coverage checks
+  all three column orders with and without a BOM.
+
 - **`/apply` Step 5b now actually runs the page-count check it claimed Step 5d ran**
   (`.claude/commands/apply.md`, `tests/test_apply_page_count.py`) - the 5b prose said
   "Page count is not checked here - that is `verify_pdf.py --pages`'s job, and Step 5d already

tests/test_rank_state.py

@@ -105,6 +105,22 @@ class Candidates(RankStateCase):
         self.assertEqual([row["key"] for row in out["selected"]], ["b"])
         self.assertEqual(out["excluded_by_tracker"], 1)
 
+    def test_tracker_exclusion_handles_utf8_bom_and_reordered_columns(self):
+        self.write_state({"a": entry(company="Acme", title="SOC Analyst"), "b": entry(company="Other")})
+        tracker = self.tmp / "tracker.csv"
+        # A spreadsheet export can prepend a BOM to either matching column.
+        for encoding in ("utf-8", "utf-8-sig"):
+            for csv_text in (
+                "date,company,role\r\n2026-08-01,ACME,soc analyst\r\n",
+                "company,role,date\r\nACME,soc analyst,2026-08-01\r\n",
+                "role,company,date\r\nsoc analyst,ACME,2026-08-01\r\n",
+            ):
+                with self.subTest(encoding=encoding, header=csv_text.splitlines()[0]):
+                    tracker.write_bytes(csv_text.encode(encoding))
+                    out = self.run_tool("candidates", "--tracker", str(tracker))
+                    self.assertEqual([row["key"] for row in out["selected"]], ["b"])
+                    self.assertEqual(out["excluded_by_tracker"], 1)
+
     def test_focus_filters_on_title_company_and_stored_fit_notes(self):
         self.write_state(
             {

tools/rank_state.py

@@ -107,7 +107,7 @@ def tracker_pairs(path: Path) -> set[tuple[str, str]]:
     import csv
 
     pairs = set()
-    with path.open(encoding="utf-8", newline="") as fh:
+    with path.open(encoding="utf-8-sig", newline="") as fh:
         for row in csv.DictReader(fh):
             company, role = norm(row.get("company")), norm(row.get("role"))
             if company: