diff --git a/tools/skill_generator/crawler.py b/tools/skill_generator/crawler.py
index be79a44..dd2de3b 100644
--- a/tools/skill_generator/crawler.py
+++ b/tools/skill_generator/crawler.py
@@ -55,12 +55,6 @@
 
 GENERATED_MARKERS = ("// DO NOT EDIT", "@Generated", "// generated by")
 
-CONFIG_PREFIXES_OF_INTEREST = (
-    "datasource", "spring.datasource", "mail", "spring.mail",
-    "file", "batch", "spring.batch", "queue", "scheduler",
-    "quartz", "kafka", "redis", "app", "logging",
-)
-
 # ─────────────────────────────────────────────────────────────────────────────
 # Regex parsers (lightweight — no full Java AST library)
 # ─────────────────────────────────────────────────────────────────────────────
@@ -530,8 +524,8 @@ def iter_all(elem):
 # ─────────────────────────────────────────────────────────────────────────────
 
 def _extract_properties_prefixes(text: str) -> list:
-    """Return distinct prefix keys (everything before the first dot or =) that
-    match CONFIG_PREFIXES_OF_INTEREST or look meaningful."""
+    """Return distinct two-segment key prefixes (e.g. 'spring.datasource')
+    found in a .properties file, preserving encounter order."""
     seen = []
     for line in text.splitlines():
         line = line.strip()
@@ -546,7 +540,6 @@ def _extract_properties_prefixes(text: str) -> list:
             continue
         if not key:
             continue
-        top = key.split(".", 1)[0]
         prefix_full = ".".join(key.split(".")[:2]) if "." in key else key
         if prefix_full not in seen:
             seen.append(prefix_full)