diff --git a/.jules/sentinel.md b/.jules/sentinel.md
index 7039d665..b7fab68a 100644
--- a/.jules/sentinel.md
+++ b/.jules/sentinel.md
@@ -26,3 +26,7 @@
 **Vulnerability:** Server-Side Request Forgery (SSRF) / Local File Inclusion
 **Learning:** External URL fetching with `urllib.request.urlopen` (like API endpoints passed via environment variables) can accept schemes like `file://` implicitly, which could allow arbitrary file reading or internal network scanning if the environment is misconfigured or manipulated.
 **Prevention:** Always validate that URLs explicitly start with `http://` or `https://` before using them in standard library requests. Append  to suppress linter warnings only after verifying the input is validated.
+## 2026-07-06 - Prevent Information Disclosure in URL Validation Errors
+**Vulnerability:** Information Disclosure / Secret Leakage
+**Learning:** When validating URLs (e.g., preventing SSRF by checking for `http://` or `https://`), including the original input URL in the raised exception message (`got: {api_url}`) can inadvertently leak sensitive information, such as API keys or internal domain structures, into CI logs if the environment variable was misconfigured or manipulated.
+**Prevention:** Never reflect sensitive input values (like URLs or tokens) in security validation error messages. Provide a clear, static message indicating why the validation failed without echoing the untrusted input.
diff --git a/scripts/ci/noema_review_gate.py b/scripts/ci/noema_review_gate.py
index 621e4506..47f35db8 100644
--- a/scripts/ci/noema_review_gate.py
+++ b/scripts/ci/noema_review_gate.py
@@ -277,9 +277,11 @@ def call_llm(repo: str, number: int, pr: dict[str, Any], diff: str, truncated: b
     if not api_url or not api_key:
         print("Noema LLM review unavailable: NOEMA_LLM_API_URL or NOEMA_LLM_API_KEY is not configured.")
         return None
+    api_url_lower = api_url.lower()
+    if not (api_url_lower.startswith("http://") or api_url_lower.startswith("https://")):
+        raise ValueError("NOEMA_LLM_API_URL must start with http:// or https:// to prevent SSRF vulnerabilities")
+
     parsed = urllib.parse.urlparse(api_url)
-    if parsed.scheme.lower() not in {"http", "https"}:
-        raise ValueError("URL scheme must be http or https")
     hostname = (parsed.hostname or "").lower()
     if not hostname:
         raise ValueError("URL must have a valid hostname")
@@ -299,9 +301,6 @@ def call_llm(repo: str, number: int, pr: dict[str, Any], diff: str, truncated: b
             if ip.is_private or ip.is_loopback or ip.is_link_local or ip.is_multicast or ip.is_unspecified:
                 raise ValueError("URL cannot target internal IP addresses")
 
-    if not (api_url.startswith("http://") or api_url.startswith("https://")):
-        raise ValueError(f"NOEMA_LLM_API_URL must start with http:// or https:// to prevent SSRF vulnerabilities, got: {api_url}")
-
     prompt = {
         "role": "user",
         "content": "\n".join(
diff --git a/scripts/ci/run_opencode_review_model_pool.sh b/scripts/ci/run_opencode_review_model_pool.sh
index 6cdf1b85..09e314d7 100644
--- a/scripts/ci/run_opencode_review_model_pool.sh
+++ b/scripts/ci/run_opencode_review_model_pool.sh
@@ -101,6 +101,11 @@ assert_reasoning_effort_for_candidate() {
 
 is_context_overflow_failure() {
 	local opencode_json_file="$1"
+	local exit_code="${2:-}"
+
+	if [ "$exit_code" = "124" ]; then
+		return 1
+	fi
 
 	[ -s "$opencode_json_file" ] || return 1
 	grep -Eiq 'ContextOverflowError|tokens_limit_reached|Request body too large|context window' "$opencode_json_file"
@@ -132,7 +137,7 @@ run_one_model_attempt() {
 	set -e
 	if [ "$opencode_status" -ne 0 ]; then
 		printf 'OpenCode %s attempt %s/%s failed with exit %s.\n' "$model_candidate" "$attempt" "$attempts" "$opencode_status"
-		if is_context_overflow_failure "$opencode_json_file"; then
+		if is_context_overflow_failure "$opencode_json_file" "$opencode_status"; then
 			printf 'OpenCode %s attempt %s/%s exceeded the provider context window; skipping remaining attempts for this model.\n' "$model_candidate" "$attempt" "$attempts"
 			return 2
 		fi
@@ -143,7 +148,7 @@ run_one_model_attempt() {
 	if [ -z "$session_id" ] || [ "$session_id" = "null" ]; then
 		printf 'OpenCode %s attempt %s/%s JSON output did not include a session id.\n' "$model_candidate" "$attempt" "$attempts"
 		cat "$opencode_json_file"
-		if is_context_overflow_failure "$opencode_json_file"; then
+		if is_context_overflow_failure "$opencode_json_file" "$opencode_status"; then
 			printf 'OpenCode %s attempt %s/%s exceeded the provider context window; skipping remaining attempts for this model.\n' "$model_candidate" "$attempt" "$attempts"
 			return 2
 		fi
diff --git a/tests/test_noema_review_gate.py b/tests/test_noema_review_gate.py
index cc68ff28..f7e54288 100644
--- a/tests/test_noema_review_gate.py
+++ b/tests/test_noema_review_gate.py
@@ -206,7 +206,7 @@ def test_call_llm_handles_configuration_and_verdicts(monkeypatch):
 
     monkeypatch.setenv("NOEMA_LLM_API_URL", "file:///etc/passwd")
     monkeypatch.setenv("NOEMA_LLM_API_KEY", "secret")
-    with pytest.raises(ValueError, match="must start with http:// or https://"):
+    with pytest.raises(ValueError, match="^NOEMA_LLM_API_URL must start with http:// or https:// to prevent SSRF vulnerabilities$"):
         noema.call_llm("owner/repo", 1, pr, "diff", False)
 
     monkeypatch.setenv("NOEMA_LLM_API_URL", "https://llm.example.test/chat")
@@ -240,7 +240,7 @@ def fake_urlopen(request, timeout):
 
     # Test invalid scheme (and no original URL in error)
     monkeypatch.setenv("NOEMA_LLM_API_URL", "file:///etc/passwd")
-    with pytest.raises(ValueError, match="URL scheme must be http or https"):
+    with pytest.raises(ValueError, match="^NOEMA_LLM_API_URL must start with http:// or https:// to prevent SSRF vulnerabilities$"):
         noema.call_llm("owner/repo", 1, pr, "diff", False)
 
     # Test localhost rejection