diff --git a/scripts/common.py b/scripts/common.py
index c8f95b17..50cf0649 100644
--- a/scripts/common.py
+++ b/scripts/common.py
@@ -217,6 +217,27 @@ def resolve_local_file(
     return None, "not_found"
 
 
+def compute_coverage(platform_name: str, platforms_dir: str, db: dict) -> dict:
+    """Compute BIOS coverage for a platform using verify logic."""
+    from verify import verify_platform
+    config = load_platform_config(platform_name, platforms_dir)
+    result = verify_platform(config, db)
+    present = result["ok"] + result["untested"]
+    pct = (present / result["total"] * 100) if result["total"] > 0 else 0
+    return {
+        "platform": config.get("platform", platform_name),
+        "total": result["total"],
+        "verified": result["ok"],
+        "untested": result["untested"],
+        "missing": result["missing"],
+        "present": present,
+        "percentage": pct,
+        "mode": config.get("verification_mode", "existence"),
+        "details": result["details"],
+        "config": config,
+    }
+
+
 def safe_extract_zip(zip_path: str, dest_dir: str) -> None:
     """Extract a ZIP file safely, preventing zip-slip path traversal."""
     dest = os.path.realpath(dest_dir)
diff --git a/scripts/generate_readme.py b/scripts/generate_readme.py
index 25c9f369..0d43c035 100644
--- a/scripts/generate_readme.py
+++ b/scripts/generate_readme.py
@@ -18,33 +18,10 @@ from datetime import datetime, timezone
 from pathlib import Path
 
 sys.path.insert(0, os.path.dirname(__file__))
-from common import load_database, load_platform_config
-
-try:
-    import yaml
-except ImportError:
-    yaml = None
+from common import load_database, compute_coverage
 
 SITE_URL = "https://abdess.github.io/retrobios/"
-RELEASE_URL = "../../releases/latest"
-
-
-def _compute_coverage(platform_name: str, platforms_dir: str, db: dict) -> dict:
-    from verify import verify_platform
-    config = load_platform_config(platform_name, platforms_dir)
-    result = verify_platform(config, db)
-    present = result["ok"] + result["untested"]
-    pct = (present / result["total"] * 100) if result["total"] > 0 else 0
-    return {
-        "platform": config.get("platform", platform_name),
-        "total": result["total"],
-        "verified": result["ok"],
-        "untested": result["untested"],
-        "missing": result["missing"],
-        "present": present,
-        "percentage": pct,
-        "mode": config.get("verification_mode", "existence"),
-    }
+RELEASE_URL = "https://github.com/Abdess/retrobios/releases/latest"
 
 
 def generate_readme(db: dict, platforms_dir: str) -> str:
@@ -61,7 +38,7 @@ def generate_readme(db: dict, platforms_dir: str) -> str:
     coverages = {}
     for name in platform_names:
         try:
-            coverages[name] = _compute_coverage(name, platforms_dir, db)
+            coverages[name] = compute_coverage(name, platforms_dir, db)
         except FileNotFoundError:
             pass
 
diff --git a/scripts/generate_site.py b/scripts/generate_site.py
index d74a4a20..89b805b4 100644
--- a/scripts/generate_site.py
+++ b/scripts/generate_site.py
@@ -26,7 +26,7 @@ except ImportError:
     sys.exit(1)
 
 sys.path.insert(0, os.path.dirname(__file__))
-from common import load_database, load_platform_config
+from common import load_database, load_platform_config, compute_coverage
 
 DOCS_DIR = "docs"
 SITE_NAME = "RetroBIOS"
@@ -67,25 +67,6 @@ def _status_icon(pct: float) -> str:
 # Coverage computation (reuses verify.py logic)
 # ---------------------------------------------------------------------------
 
-def _compute_coverage(platform_name: str, platforms_dir: str, db: dict) -> dict:
-    from verify import verify_platform
-    config = load_platform_config(platform_name, platforms_dir)
-    result = verify_platform(config, db)
-    present = result["ok"] + result["untested"]
-    pct = (present / result["total"] * 100) if result["total"] > 0 else 0
-    return {
-        "platform": config.get("platform", platform_name),
-        "total": result["total"],
-        "verified": result["ok"],
-        "untested": result["untested"],
-        "missing": result["missing"],
-        "present": present,
-        "percentage": pct,
-        "mode": config.get("verification_mode", "existence"),
-        "details": result["details"],
-        "config": config,
-    }
-
 
 # ---------------------------------------------------------------------------
 # Load emulator profiles
@@ -169,7 +150,7 @@ def generate_home(db: dict, coverages: dict, emulator_count: int,
 
 def generate_platform_index(coverages: dict) -> str:
     lines = [
-        "# Platforms",
+        f"# Platforms - {SITE_NAME}",
         "",
         "| Platform | Coverage | Verification | Status |",
         "|----------|----------|-------------|--------|",
@@ -276,7 +257,7 @@ def _group_by_manufacturer(db: dict) -> dict[str, dict[str, list]]:
 
 def generate_systems_index(manufacturers: dict) -> str:
     lines = [
-        "# Systems",
+        f"# Systems - {SITE_NAME}",
         "",
         "| Manufacturer | Consoles | Files |",
         "|-------------|----------|-------|",
@@ -355,13 +336,14 @@ def generate_system_page(
 
 def generate_emulators_index(profiles: dict) -> str:
     lines = [
-        "# Emulators",
+        f"# Emulators - {SITE_NAME}",
         "",
         "| Engine | Type | Systems | Files |",
         "|--------|------|---------|-------|",
     ]
 
-    unique = {k: v for k, v in profiles.items() if v.get("type") != "alias"}
+    unique = {k: v for k, v in profiles.items() if v.get("type") not in ("alias", "test")}
+    test_cores = {k: v for k, v in profiles.items() if v.get("type") == "test"}
     aliases = {k: v for k, v in profiles.items() if v.get("type") == "alias"}
 
     for name in sorted(unique.keys()):
@@ -494,6 +476,11 @@ def generate_gap_analysis(
     total_in_repo = 0
     total_missing = 0
 
+    # Build global set of all platform-declared filenames (once)
+    all_platform_names = set()
+    for pfiles in platform_files.values():
+        all_platform_names.update(pfiles)
+
     emulator_gaps = []
     for emu_name, profile in sorted(profiles.items()):
         if profile.get("type") == "alias":
@@ -502,11 +489,6 @@ def generate_gap_analysis(
         if not files:
             continue
 
-        # Collect all files declared by any platform (global check)
-        all_platform_names = set()
-        for pfiles in platform_files.values():
-            all_platform_names.update(pfiles)
-
         undeclared = []
         for f in files:
             fname = f.get("name", "")
@@ -676,7 +658,7 @@ def generate_mkdocs_nav(
         slug = mfr.lower().replace(" ", "-")
         system_nav.append({mfr: f"systems/{slug}.md"})
 
-    unique_profiles = {k: v for k, v in profiles.items() if v.get("type") != "alias"}
+    unique_profiles = {k: v for k, v in profiles.items() if v.get("type") not in ("alias", "test")}
     emu_nav = [{"Overview": "emulators/index.md"}]
     for name in sorted(unique_profiles.keys()):
         display = unique_profiles[name].get("emulator", name)
@@ -734,7 +716,7 @@ def main():
     coverages = {}
     for name in sorted(platform_names):
         try:
-            cov = _compute_coverage(name, args.platforms_dir, db)
+            cov = compute_coverage(name, args.platforms_dir, db)
             coverages[name] = cov
             print(f"  {cov['platform']}: {cov['present']}/{cov['total']} ({_pct(cov['present'], cov['total'])})")
         except FileNotFoundError as e:
@@ -793,9 +775,10 @@ def main():
 
     with open("mkdocs.yml") as f:
         content = f.read()
-    # Replace or append nav section
+    # Replace nav section (everything from \nnav: to the next top-level key or EOF)
+    import re
     if "\nnav:" in content:
-        content = content[:content.index("\nnav:") + 1] + nav_yaml
+        content = re.sub(r'\nnav:.*', '\n' + nav_yaml.rstrip(), content, count=1, flags=re.DOTALL)
     else:
         content += "\n" + nav_yaml
     with open("mkdocs.yml", "w") as f: