Preserve open provenance disclosures

Authored-By: Codex (GPT-5) <noreply@openai.com>

check.sh

@@ -42,7 +42,8 @@ elif ! RENDERED_BODY=$(printf '%s' "${BODY}" |
 fi
 
 # A collapsed disclosure is valid supporting content, but provenance inside one
-# is not visible by default. Remove details subtrees before locating sections.
+# is not visible by default. Remove only collapsed details subtrees; an open
+# disclosure remains visible unless one of its ancestors is collapsed.
 VISIBLE_BODY=$(printf '%s\n' "${RENDERED_BODY}" |
   awk '
     {
@@ -53,11 +54,18 @@ VISIBLE_BODY=$(printf '%s\n' "${RENDERED_BODY}" |
           tag=tag char
           if (char == ">") {
             lower=tolower(tag)
-            if (lower ~ /^<details([[:space:]>])/) details_depth++
-            else if (lower ~ /^<\/details([[:space:]>])/) {
-              if (details_depth > 0) details_depth--
+            if (lower ~ /^<details([[:space:]>])/) {
+              parent_hidden=(details_depth > 0 && hidden[details_depth])
+              details_depth++
+              hidden[details_depth]=(parent_hidden || lower !~ /[[:space:]]open([[:space:]=>]|$)/)
             }
-            else if (details_depth == 0) printf "%s", tag
+            else if (lower ~ /^<\/details([[:space:]>])/) {
+              if (details_depth > 0) {
+                delete hidden[details_depth]
+                details_depth--
+              }
+            }
+            else if (!hidden[details_depth]) printf "%s", tag
             in_tag=0
             tag=""
           }
@@ -66,7 +74,7 @@ VISIBLE_BODY=$(printf '%s\n' "${RENDERED_BODY}" |
           in_tag=1
           tag=char
         }
-        else if (details_depth == 0) printf "%s", char
+        else if (!hidden[details_depth]) printf "%s", char
       }
     }
   ')