diff --git a/.config/kak/scripts/lsp-diags.py b/.config/kak/scripts/lsp-diags.py
index 9d811a22..77a628dd 100755
--- a/.config/kak/scripts/lsp-diags.py
+++ b/.config/kak/scripts/lsp-diags.py
@@ -1,10 +1,39 @@
 #!/usr/bin/env python
 
+Position = tuple[int, int]
+SpecList = list[tuple[Position, Position]]
+
 
 def parse_specs(data: str):
-    diagnostics = []
+    diagnostics: SpecList = []
     for entry in data.strip().split():
         if not entry or len(entry) < 9:
             continue
         range_part, _ = entry.split("|", 1)
         start_str, end_str = range_part.split(",")
+        sl, sc = map(int, start_str.split("."))
+        el, ec = map(int, end_str.split("."))
+        diagnostics.append(((sl, sc), (el, ec)))
+    return diagnostics
+
+
+def is_cursor_in_any(cursor: Position, diagnostics: SpecList) -> bool:
+    cl, cc = cursor
+    for (sl, sc), (el, ec) in diagnostics:
+        if sl == el == cl and sc <= cc <= ec:
+            return True
+        elif sl < cl < el:
+            return True
+        elif cl == sl and cc >= sc:
+            return True
+        elif cl == el and cc <= sc:
+            return True
+    return False
+
+
+if __name__ == "__main__":
+    test_data = "1 10.21,10.30|DiagnosticHint 33.43,33.47|DiagnosticHint 34.7,34.10|DiagnosticHint 57.8,57.17|DiagnosticHint 68.9,68.18|DiagnosticHint 69.14,69.23|DiagnosticHint 72.7,72.11|DiagnosticHint 73.70,73.79|DiagnosticHint 75.7,75.11|DiagnosticHint 77.47,77.56|DiagnosticHint 79.27,79.28|DiagnosticHint 81.61,81.70|DiagnosticHint 84.66,84.75|DiagnosticHint 96.4,96.13|DiagnosticHint 97.3,97.12|DiagnosticHint 101.8,101.20|DiagnosticHint 145.28,145.43|DiagnosticHint 153.13,153.21|DiagnosticHint 155.13,155.21|DiagnosticHint 158.5,158.14|DiagnosticHint 164.56,164.61|DiagnosticHint 203.21,203.21|DiagnosticHint 204.28,204.28|DiagnosticHint 206.16,206.16|DiagnosticHint 209.5,209.5|DiagnosticHint 210.5,210.5|DiagnosticHint 216.25,216.25|DiagnosticHint 219.21,219.21|DiagnosticHint 225.27,225.27|DiagnosticHint 234.59,234.59|DiagnosticHint 263.37,263.39|DiagnosticHint 268.55,268.57|DiagnosticHint 287.46,287.47|DiagnosticHint 326.16,326.25|DiagnosticHint 337.34,337.36|DiagnosticHint 339.33,339.35|DiagnosticHint 364.63,364.71|DiagnosticHint 366.46,366.54|DiagnosticHint"
+    out = parse_specs(test_data)
+    print(out)
+    test_cursor = (10, 24)
+    print(is_cursor_in_any(test_cursor, out))