diff --git a/lib/lint.sh b/lib/lint.sh
index 077f1e9..e38b996 100644
--- a/lib/lint.sh
+++ b/lib/lint.sh
@@ -6,6 +6,9 @@
 
 # Valid values for the 'type' frontmatter field.
 # Must stay in sync with the type list in templates/agents-genome.md.
+# Note: 'index' and 'log' are wiki-level singleton files (wiki/index.md, wiki/log.md).
+#       'conflict' has no dedicated scaffold directory — it is a cross-cutting type
+#       that can live under any wiki/ subdirectory.
 VALID_TYPES=("source" "entity" "concept" "query" "conflict" "private" "index" "log")
 
 # ---------------------------------------------------------------------------
@@ -121,7 +124,7 @@ check_knowledge_decay() {
 
   # Parse date — handle both GNU date (Linux) and BSD date (macOS)
   local updated_ts
-  if date --version &>/dev/null 2>&1; then
+  if date --version >/dev/null 2>&1; then
     # GNU date
     updated_ts=$(date -d "$last_updated" +%s 2>/dev/null)
   else
@@ -161,7 +164,7 @@ check_broken_links() {
 
   # Extract link targets, stripping aliases: [[Link|Alias]] -> Link
   local links
-  links=$(grep -oP '\[\[\K[^\]]+' "$file" 2>/dev/null | cut -d'|' -f1)
+  links=$(grep -oE '\[\[[^\]]+' "$file" 2>/dev/null | sed 's/^\[\[//' | cut -d'|' -f1)
 
   for link in $links; do
     local target="$link"