diff --git a/README.md b/README.md
index 0cbde6c..a0f4c16 100644
--- a/README.md
+++ b/README.md
@@ -77,9 +77,10 @@ The check validates four things for every non-break-glass Agent PR:
    `Fixes bug-<id>` automation token and the matching navigable
    `https://agenthub.fritzlab.net/bug-<id>` URL. Every PR has a separate
    `## Attribution` section containing the canonical `Authored-By`
-   product/model watermark. The action asks Gitea to render the body and checks
-   the rendered `<h2>` sections; fenced, commented, scripted, or collapsed
-   copies do not satisfy the visible provenance contract.
+   product/model watermark. The action asks Gitea to render the body with a
+   bounded 5-second connection and 15-second total wait, then checks visible
+   `<h2>` sections outside collapsed `<details>` content. Fenced, commented,
+   scripted, or collapsed copies do not satisfy the visible provenance contract.
 
 4. **Commit attribution** — every commit in `base-sha..head-sha`, including
    commits on `chore/` branches, ends with
diff --git a/check.sh b/check.sh
index 8c13f08..324a47a 100755
--- a/check.sh
+++ b/check.sh
@@ -32,16 +32,44 @@ if [ -z "${SERVER_URL}" ] || [ -z "${TOKEN}" ]; then
 elif ! RENDERED_BODY=$(printf '%s' "${BODY}" |
   jq -Rs '{Text: ., Mode: "gfm"}' |
   curl --fail --silent --show-error \
+    --connect-timeout 5 \
+    --max-time 15 \
     --header "Authorization: token ${TOKEN}" \
     --header "Content-Type: application/json" \
     --data-binary @- "${SERVER_URL%/}/api/v1/markdown"); then
   echo "FAIL[check-naming]: Gitea could not render the PR body"
   FAILED=1
 fi
-if printf '%s\n' "${RENDERED_BODY}" | grep -Eiq '<details([[:space:]>])'; then
-  echo "FAIL[check-naming]: rendered PR body must not contain collapsed details"
-  FAILED=1
-fi
+
+# A collapsed disclosure is valid supporting content, but provenance inside one
+# is not visible by default. Remove details subtrees before locating sections.
+VISIBLE_BODY=$(printf '%s\n' "${RENDERED_BODY}" |
+  awk '
+    {
+      line=$0 "\n"
+      for (i=1; i<=length(line); i++) {
+        char=substr(line, i, 1)
+        if (in_tag) {
+          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--
+            }
+            else if (details_depth == 0) printf "%s", tag
+            in_tag=0
+            tag=""
+          }
+        }
+        else if (char == "<") {
+          in_tag=1
+          tag=char
+        }
+        else if (details_depth == 0) printf "%s", char
+      }
+    }
+  ')
 
 # ---- branch form ----
 # <role>/bug-<id>/<kebab>
@@ -81,7 +109,7 @@ if [ "${BRANCH_KIND}" = "role-bug" ]; then
     FAILED=1
   fi
 
-  tracking=$(printf '%s\n' "${RENDERED_BODY}" | awk '
+  tracking=$(printf '%s\n' "${VISIBLE_BODY}" | awk '
     /<h2[^>]*>Tracking<\/h2>/ { in_section=1; next }
     /<h2[^>]*>/ && in_section { exit }
     in_section { print }
@@ -90,7 +118,7 @@ if [ "${BRANCH_KIND}" = "role-bug" ]; then
     echo "FAIL[check-naming]: PR body must contain a non-empty ## Tracking section"
     FAILED=1
   else
-    if ! printf '%s\n' "${tracking}" | grep -qE "(^|[[:space:]])Fixes[[:space:]]+${BRANCH_BUG}([^a-z0-9]|$)"; then
+    if ! printf '%s\n' "${tracking}" | grep -qE "(^|[[:space:]>])Fixes[[:space:]]+${BRANCH_BUG}([^a-z0-9]|$)"; then
       echo "FAIL[check-naming]: ## Tracking must contain the literal token 'Fixes ${BRANCH_BUG}'"
       FAILED=1
     fi
@@ -106,7 +134,7 @@ elif [ "${BRANCH_KIND}" = "chore" ] && [ -n "${TITLE_BUG}" ]; then
 fi
 
 if [ "${BRANCH_KIND}" != "invalid" ]; then
-  attribution=$(printf '%s\n' "${RENDERED_BODY}" | awk '
+  attribution=$(printf '%s\n' "${VISIBLE_BODY}" | awk '
     /<h2[^>]*>Attribution<\/h2>/ { in_section=1; next }
     /<h2[^>]*>/ && in_section { exit }
     in_section { print }
diff --git a/tests/bin/curl b/tests/bin/curl
index f7b975e..63b420a 100755
--- a/tests/bin/curl
+++ b/tests/bin/curl
@@ -2,6 +2,29 @@
 # Deterministic Gitea Markdown renderer stub for check.sh contract tests.
 set -euo pipefail
 
+connect_timeout=0
+total_timeout=0
+while [ "$#" -gt 0 ]; do
+  case "$1" in
+    --connect-timeout)
+      [ "${2:-}" = "5" ] || exit 2
+      connect_timeout=1
+      shift 2
+      ;;
+    --max-time)
+      [ "${2:-}" = "15" ] || exit 2
+      total_timeout=1
+      shift 2
+      ;;
+    *) shift ;;
+  esac
+done
+[ "${connect_timeout}" -eq 1 ] && [ "${total_timeout}" -eq 1 ] || exit 2
+
+if printf '%s\n' "${PR_BODY}" | grep -Fq '[[stall-renderer]]'; then
+  exit 28
+fi
+
 if printf '%s\n' "${PR_BODY}" | grep -Fq '<!--'; then
   exit 0
 fi
@@ -34,12 +57,17 @@ printf '%s\n' "${PR_BODY}" | awk '
       in_script=1
       next
     }
+    if (lower ~ /^[ ]{0,3}<\/details([[:blank:]>])/) {
+      print "</details>"
+      next
+    }
     if (lower ~ /^[ ]{0,3}<details([[:blank:]>])/) {
       print "<details>"
       next
     }
     if (line ~ /^## Tracking[[:space:]]*$/) print "<h2>Tracking</h2>"
     else if (line ~ /^## Attribution[[:space:]]*$/) print "<h2>Attribution</h2>"
+    else if (line ~ /^- Fixes[[:space:]]/) print "<li>" substr(line, 3) "</li>"
     else if (line ~ /Authored-By:.*<noreply@[[:alnum:].-]+>/) {
       email=line
       sub(/^.*</, "", email)
diff --git a/tests/run b/tests/run
index 68a34e1..cbfc49a 100755
--- a/tests/run
+++ b/tests/run
@@ -178,10 +178,16 @@ check_contract_pass "fenced code examples remain available" \
   "$BASE" "$GOOD_HEAD"
 check_contract "details cannot collapse provenance" \
   $'<details><summary>Release notes</summary>\n\n## Tracking\n- Fixes bug-x7k2m9 — https://agenthub.fritzlab.net/bug-x7k2m9\n\n## Attribution\n- Authored-By: Codex (GPT-5) <noreply@openai.com>\n</details>' \
-  "$BASE" "$GOOD_HEAD" "rendered PR body must not contain collapsed details"
+  "$BASE" "$GOOD_HEAD" "PR body must contain a non-empty ## Tracking section"
+check_contract_pass "unrelated collapsed details remain available" \
+  $'<details><summary>Logs</summary>\n\nSupporting output\n</details>\n\n## Tracking\n- Fixes bug-x7k2m9 — https://agenthub.fritzlab.net/bug-x7k2m9\n\n## Attribution\n- Authored-By: Codex (GPT-5) <noreply@openai.com>' \
+  "$BASE" "$GOOD_HEAD"
 check_contract "script cannot suppress provenance" \
   $'<script>\n## Tracking\n- Fixes bug-x7k2m9 — https://agenthub.fritzlab.net/bug-x7k2m9\n\n## Attribution\n- Authored-By: Codex (GPT-5) <noreply@openai.com>\n</script>' \
   "$BASE" "$GOOD_HEAD" "PR body must contain a non-empty ## Tracking section"
+check_contract "stalled renderer fails closed at the curl timeout" \
+  "$(canonical_body bug-x7k2m9)"$'\n[[stall-renderer]]' \
+  "$BASE" "$GOOD_HEAD" "Gitea could not render the PR body"
 
 git -C "${FIXTURES}" commit --allow-empty -q -m "unwatermarked change"
 BAD_HEAD=$(git -C "${FIXTURES}" rev-parse HEAD)