diff --git a/kb/python-course-kb-practical-python/tests/test_kb_integrity.py b/kb/python-course-kb-practical-python/tests/test_kb_integrity.py
index 2bba07e..70ad6bb 100644
--- a/kb/python-course-kb-practical-python/tests/test_kb_integrity.py
+++ b/kb/python-course-kb-practical-python/tests/test_kb_integrity.py
@@ -1,6 +1,7 @@
 import json
 import re
 from pathlib import Path
+from urllib.parse import urlparse
 
 
 KB_ROOT = Path(__file__).resolve().parents[1]
@@ -16,6 +17,7 @@ PROMPT_INJECTION_RE = re.compile(
     r"(ignore previous instructions|disregard previous instructions|reveal the system prompt)",
     re.IGNORECASE,
 )
+URL_RE = re.compile(r"https?://[^\s<>)\]]+")
 
 VISIBLE_FORBIDDEN_PATTERNS = (
     "../private",
@@ -98,6 +100,14 @@ def rel(path: Path) -> str:
     return path.relative_to(KB_ROOT).as_posix()
 
 
+def contains_insecure_docs_python_url(text: str) -> bool:
+    for match in URL_RE.finditer(text):
+        parsed = urlparse(match.group(0).rstrip(".,;:"))
+        if parsed.scheme == "http" and parsed.netloc == "docs.python.org":
+            return True
+    return False
+
+
 def frontmatter_value(text: str, key: str) -> str | None:
     lines = text.splitlines()
     if not lines or lines[0] != "---":
@@ -285,7 +295,7 @@ def test_semantic_lint_known_findings_stay_fixed():
         errors.append("summaries/01_Python.md does not clarify Python 3.6 historical context")
     if "不保证 URL 长期可用" not in python_summary or "本地 XML 示例文件" not in python_summary:
         errors.append("summaries/01_Python.md does not clarify external API example stability")
-    if "http://docs.python.org" in python_summary:
+    if contains_insecure_docs_python_url(python_summary):
         errors.append("summaries/01_Python.md still uses HTTP docs.python.org link")
 
     if "[[summaries/practical-python-attribution]]" not in overview:
@@ -321,7 +331,7 @@ def test_semantic_lint_known_findings_stay_fixed():
         WIKI_ROOT / "concepts" / "Python-文档与帮助系统.md",
         WIKI_ROOT / "exercises" / "1-2-getting-help.md",
     ]:
-        if "http://docs.python.org" in read_text(path):
+        if contains_insecure_docs_python_url(read_text(path)):
             errors.append(f"{rel(path)} still uses HTTP docs.python.org link")
 
     for target in REMOVED_CONCEPT_ALIAS_TARGETS:
@@ -341,6 +351,12 @@ def test_semantic_lint_known_findings_stay_fixed():
     assert errors == []
 
 
+def test_docs_python_http_detection_matches_exact_host():
+    assert contains_insecure_docs_python_url("See http://docs.python.org/3/library/pathlib.html")
+    assert not contains_insecure_docs_python_url("See https://docs.python.org/3/library/pathlib.html")
+    assert not contains_insecure_docs_python_url("See http://docs.python.org.example.com/3/library/pathlib.html")
+
+
 def test_followup_enhancements_are_indexed_and_scoped():
     index_text = read_text(WIKI_ROOT / "index.md")
     errors = []
diff --git a/tests/e2e/student_loop_discovery.py b/tests/e2e/student_loop_discovery.py
index 2ad7381..5e2be3c 100644
--- a/tests/e2e/student_loop_discovery.py
+++ b/tests/e2e/student_loop_discovery.py
@@ -8,6 +8,7 @@ import re
 import subprocess
 import sys
 import time
+import uuid
 from datetime import datetime, timezone
 from pathlib import Path
 from typing import Any, Iterable
@@ -98,6 +99,7 @@ REQUIRED_JOURNEY_EVENT_KEYS = {
     "visible_state",
     "api_state",
 }
+FINGERPRINT_NAMESPACE = uuid.UUID("46ad4a87-ef03-4e26-a1a7-a7e5f9c66a93")
 
 
 class DiscoveryLoop:
@@ -372,7 +374,6 @@ class DiscoveryLoop:
             "message_present": bool(parsed.get("message")),
             "expected_state": parsed.get("expected_state"),
             "validation": validation,
-            "actor_prompt_hash": hashlib.sha256(actor_prompt.encode("utf-8")).hexdigest()[:16],
             "model_metadata": self.actor_model_metadata(),
             "untrusted_evidence": True,
         }
@@ -2896,7 +2897,7 @@ def fingerprint_finding(finding: dict[str, Any], policy: dict[str, Any]) -> str:
     fields = [str(item) for item in policy["issueClustering"]["fingerprintFields"]]
     payload = {field: finding.get(field) for field in fields}
     encoded = json.dumps(payload, sort_keys=True, ensure_ascii=False)
-    return hashlib.sha256(encoded.encode("utf-8")).hexdigest()[:24]
+    return uuid.uuid5(FINGERPRINT_NAMESPACE, encoded).hex[:24]
 
 
 def build_issue_clusters(findings: list[dict[str, Any]], policy: dict[str, Any]) -> list[dict[str, Any]]: