feat(pair-corpus-honesty): add vibe-py, vfc-js and agent-vfc slices with mechanism vocabulary

Tasks 1.1, 5.1, 5.2, 5.4 and the data half of 5.3.

- mechanisms.toml: closed vocabulary v1 (20 ids) every expected row cites.
- vibe-py: 35 Real-Vuln-Benchmark pairs (Apache-2.0), human provenance only
  because the LLM-generated repositories carry no license (escalated).
- vfc-js: 17 Node fix-commit pairs harvested upstream (MIT/Apache-2.0),
  SecBench.js itself is not vendored (no license); sinks derived on 13/17.
- agent-vfc: 29 agent-trailer fixes as catalog-candidates.toml plus
  REVIEW.md; the loaded catalog stays empty until a human reviews them.
- datasets.toml and README document every slice and its review status.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG

benchmarks/pairs/vibe-py/threatbyte-routes-dashboard/fixed.py

@@ -0,0 +1,53 @@
+# Provenance: anotherik/ThreatByte dashboard (fixed).
+# repo: anotherik/ThreatByte
+# commit: c4db46f72586c4ecb65859051ea037018dbf0e5e
+# parent: c4db46f72586c4ecb65859051ea037018dbf0e5e
+# commit_url: https://github.com/anotherik/ThreatByte/blob/c4db46f72586c4ecb65859051ea037018dbf0e5e/server/routes.py#L137
+# cve: 
+# license: MIT
+# function: dashboard
+# relpath: server/routes.py
+# provenance: human
+# mechanism: source_reaches_sink
+
+def login():
+    """
+    Handles user login.
+
+    On GET request:
+    Renders the login page.
+
+    On POST request:
+    Retrieves the username and password from the login form.
+    Queries the database for the user based on the provided username.
+    Checks if the provided password matches the hashed password stored in the database.
+    If authentication succeeds, stores the username in the session and redirects to the dashboard.
+    If authentication fails, renders the login page with an error message.
+    """
+    if request.method == 'POST':
+        username = request.form.get('username')
+        password = request.form.get('password')
+        if not username or not password:
+            return render_template('login.html', error='Please provide username and password')
+        
+        # Query the database for the user using parameterized query
+        with get_db_connection() as conn:
+            cursor = conn.cursor()
+            query = "SELECT * FROM users WHERE username = ? OR email = ?"
+            cursor.execute(query, (username,username))
+            user = cursor.fetchone()
+        
+        # Check if the user exists and the password matches
+        if user and user['password'] == custom_hash(password):
+            session['username'] = user['username']
+            session['user_id'] = user['id']
+
+            # Update last_login timestamp
+            cursor.execute("UPDATE users SET last_login = ? WHERE username = ?", (datetime.datetime.now(), username))
+            conn.commit()
+            conn.close()
+
+            return redirect(url_for('dashboard'))
+        else:
+            return render_template('login.html', error='Invalid username or password')
+    return render_template('login.html')

benchmarks/pairs/vibe-py/threatbyte-routes-dashboard/vuln.py

@@ -0,0 +1,36 @@
+# Provenance: anotherik/ThreatByte dashboard (vuln).
+# repo: anotherik/ThreatByte
+# commit: c4db46f72586c4ecb65859051ea037018dbf0e5e
+# parent: c4db46f72586c4ecb65859051ea037018dbf0e5e
+# commit_url: https://github.com/anotherik/ThreatByte/blob/c4db46f72586c4ecb65859051ea037018dbf0e5e/server/routes.py#L137
+# cve: 
+# license: MIT
+# function: dashboard
+# relpath: server/routes.py
+# provenance: human
+# mechanism: source_reaches_sink
+
+def dashboard():
+    # Check if the user is logged in
+    if 'username' in session:
+        
+        search_query = request.args.get('search', '')
+
+        # Get user_id from the session username
+        with get_db_connection() as conn:
+            cursor = conn.cursor()
+            query = "SELECT id FROM users WHERE username = ?"
+            cursor.execute(query, (session['username'],))
+            user = cursor.fetchone()
+            user_id = user['id']
+
+        if search_query:
+            s_query = f"SELECT filename FROM files WHERE user_id = {user_id} AND filename LIKE '%{search_query}%'"
+            cursor.execute(s_query)
+        else:
+            cursor.execute("SELECT filename FROM files WHERE user_id = ?", (user_id,))
+        files = [row['filename'] for row in cursor.fetchall()]
+
+        return render_template('dashboard.html', files=files, search_query=search_query)
+    else:
+        return redirect(url_for('login'))