From d46f9fccf8e15ca15098de2a44abdc125f2c139c Mon Sep 17 00:00:00 2001
From: serversdown <brian@serversdown.net>
Date: Tue, 12 May 2026 19:19:46 +0000
Subject: [PATCH] fix(sfm): broaden Loc-N suffix regex to catch '.Loc' and 'Loc
 No.' variants
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Operators use more separator variations than the original regex caught:
  - "Trumbull-Brayman-JV- Mont.Dam.Loc 2-R-25" — period as separator
  - "CMU - RKM Hall - Loc No. 3 - 4615 Forbes" — "No." between Loc and digit

Added period to the separator character class and optional "No." token
before the digit.  Catches both above patterns plus near-variants
without false-positives on normal project strings.

Real-data impact: 5 more clusters now auto-strip cleanly, including the
1,903-event Trumbull-Brayman-JV- Mont.Dam cluster.  Confidence
distribution: 43 → 44 high.
---
 backend/services/metadata_backfill.py | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/backend/services/metadata_backfill.py b/backend/services/metadata_backfill.py
index 8117493..303328a 100644
--- a/backend/services/metadata_backfill.py
+++ b/backend/services/metadata_backfill.py
@@ -103,16 +103,20 @@ def _normalise(s: Optional[str]) -> str:
 # their full project_raw and the operator can edit them in the wizard.
 _PROJECT_LOC_SUFFIX = re.compile(
     r"""
-    \s*               # any leading whitespace
-    [-–—]             # hyphen or em-dash (separator before the Loc marker)
-    \s*               # optional spaces
-    (?:loc|location)  # 'Loc' or 'Location'
-    \.?               # optional period
-    \s*               # optional space
-    \#?               # optional '#'
-    \s*               # optional space
-    \d+               # required digit
-    \b                # word boundary
+    \s*                       # any leading whitespace
+    [-–—.]                    # separator: hyphen, em-dash, or period
+                              # (operators use any of these — see
+                              #  "Mont.Dam.Loc 2-R-25")
+    \s*
+    (?:loc|location)          # 'Loc' or 'Location'
+    \.?                       # optional trailing period after Loc
+    \s*
+    (?:no\.?\s*)?             # optional "No." or "No " before the digit
+                              # (e.g. "Loc No. 3", "Loc No 5")
+    \#?                       # optional '#'
+    \s*
+    \d+                       # required digit
+    \b
     """,
     re.IGNORECASE | re.VERBOSE,
 )