diff --git a/tests/test_site_r5_search.py b/tests/test_site_r5_search.py
new file mode 100644
index 000000000..07f2b1b1c
--- /dev/null
+++ b/tests/test_site_r5_search.py
@@ -0,0 +1,288 @@
+"""Round 5, package 3: search, sidebar and head.
+
+The get/ download pages sat in no tab, and the theme then numbered the tabs
+0 to 4. "snes bios" found NES.emu and never the SNES page, which answers
+"No file needed" and so never says BIOS where the search reads. An emulator
+crumb ran through its letter group ("Emulators / D"). The home page's
+structured data named the page and called it part of itself, and an
+emulator's source repository published a commit id as its version beside a
+placeholder description. These tests read the generator and, where it is
+built, the site.
+"""
+
+from __future__ import annotations
+
+import ast
+import json
+import re
+import sys
+import unittest
+from html.parser import HTMLParser
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPO_ROOT / "scripts"))
+
+import generate_site  # noqa: E402
+import sitestarlight  # noqa: E402
+from common import list_registered_platforms, load_emulator_profiles  # noqa: E402
+from tests.test_site_r2_nav import ANCHORS, _nav, _present  # noqa: E402
+
+
+def _gate_queries() -> dict[str, tuple[tuple[str, ...], int]]:
+    """The gate's QUERIES, read from website/tools/search_gate.py: a tool
+    script, not a module the suite installs."""
+    tree = ast.parse((REPO_ROOT / "website" / "tools" / "search_gate.py").read_text(encoding="utf-8"))
+    node = next(node for node in tree.body if isinstance(node, ast.AnnAssign)
+                and isinstance(node.target, ast.Name) and node.target.id == "QUERIES")
+    return ast.literal_eval(node.value)
+
+
+QUERIES = _gate_queries()
+DIST = REPO_ROOT / "website" / "dist"
+ROUTE = REPO_ROOT / "website" / "src" / "routeData.ts"
+PLATFORMS = str(REPO_ROOT / "platforms")
+
+
+def _sidebar_with_get_pages() -> tuple[dict, list[str]]:
+    nav = _nav()
+    names = list_registered_platforms(PLATFORMS, include_archived=True)
+    get_pages = ["get/index.md", *(f"get/{name}.md" for name in names)]
+    return sitestarlight.sidebar(nav, _present(nav) | set(get_pages), ANCHORS), get_pages
+
+
+class GetPagesSitInYourSetup(unittest.TestCase):
+    """3.1: a folder the navigation lists nothing of takes the tab of the
+    pages of the same name, and nothing is excluded from every tab."""
+
+    def test_every_get_page_joins_your_setup(self):
+        side, get_pages = _sidebar_with_get_pages()
+        self.assertEqual(side["options"]["exclude"], [])
+        setup = set(side["options"]["topics"].get("your-setup", []))
+        for rel in get_pages:
+            with self.subTest(page=rel):
+                self.assertIn("/" + sitestarlight._sidebar_link(rel).strip("/"), setup)
+
+    def test_no_page_is_left_out_of_every_tab(self):
+        nav = _nav()
+        present = _present(nav) | {"orphans/alone.md"}
+        side = sitestarlight.sidebar(nav, present, ANCHORS)
+        self.assertEqual(side["options"]["exclude"], [])
+        placed = {path for paths in side["options"]["topics"].values() for path in paths}
+        self.assertIn("/orphans/alone", placed)
+
+
+class ConsoleWordsReachTheConsole(unittest.TestCase):
+    """3.2: "<name> BIOS" for each console the page names, from its own
+    `consoles` field, never a word typed in the generator."""
+
+    def test_each_console_with_bios(self):
+        self.assertEqual(sitestarlight.console_words(["SNES", "Super Famicom"]),
+                         ["SNES BIOS", "Super Famicom BIOS"])
+
+    def test_the_terms_field_carries_them(self):
+        _target, text = sitestarlight.finalize_page(
+            "systems/nintendo-snes.md", "# SNES\n\nNo file needed.\n", level="0",
+            weight=None, browser_title="SNES", description="d",
+            structured={"@type": "TechArticle"}, terms={},
+            authored={"consoles": ["SNES"]})
+        self.assertIn('data-pagefind-meta="consoles:SNES"', text)
+        self.assertIn('data-pagefind-meta="terms:SNES BIOS"', text)
+
+    def test_no_search_word_is_typed_in_the_generator(self):
+        tree = ast.parse((REPO_ROOT / "scripts" / "sitestarlight.py").read_text(encoding="utf-8"))
+        docstrings = {id(node.value) for node in ast.walk(tree) if isinstance(node, ast.Expr)}
+        strings = {node.value.casefold() for node in ast.walk(tree)
+                   if isinstance(node, ast.Constant) and isinstance(node.value, str)
+                   and id(node) not in docstrings}
+        typed = {text for text in strings for query in QUERIES
+                 if re.search(rf"(?<!\w){re.escape(query)}(?!\w)", text)}
+        self.assertEqual(typed, set())
+
+
+class GateQueries(unittest.TestCase):
+    """3.2, 3.3 and 3.6: the queries the gate runs, the pages that answer
+    them and the rank they must reach."""
+
+    EXPECTED = {
+        "snes bios": (("systems/nintendo-snes/",), 1),
+        "nes bios": (("systems/nintendo-nes/",), 1),
+        "gamecube bios": (("systems/nintendo-gamecube/",), 1),
+        "game boy bios": (("systems/nintendo-game-boy/",), 1),
+        "3ds bios": (("systems/nintendo-3ds/",), 1),
+        "check my bios folder": (("wiki/troubleshooting/",), 3),
+        "is my bios correct": (("files/",), 3),
+        "schema": (("data/",), 3),
+        "json schema": (("data/",), 3),
+        "license": (("data/", "wiki/legal/"), 3),
+        "check bios folder script": (("data/",), 3),
+        "ios": (("which-pack/", "wiki/faq/"), 3),
+    }
+
+    def test_the_gate_runs_each_query(self):
+        for query, expected in self.EXPECTED.items():
+            with self.subTest(query=query):
+                self.assertEqual(QUERIES.get(query), expected)
+
+    def test_each_console_query_names_a_generated_console_page(self):
+        docs = REPO_ROOT / "website" / "src" / "content" / "docs"
+        if not docs.is_dir():
+            self.skipTest("site not generated")
+        for query, (pages, _rank) in self.EXPECTED.items():
+            if not query.endswith(" bios"):
+                continue
+            stem = pages[0].strip("/")
+            with self.subTest(query=query):
+                self.assertTrue(any((docs / f"{stem}{ext}").is_file() for ext in (".md", ".mdx")),
+                                stem)
+
+
+class LetterGroupsAreNoCrumb(unittest.TestCase):
+    """3.4: a group of names by their first letter is a way through a
+    list, not a place."""
+
+    def test_by_initial(self):
+        names = [{"label": "Dolphin", "link": "/d"}, {"label": "DuckStation", "link": "/e"}]
+        self.assertTrue(sitestarlight.by_initial("D", names))
+        self.assertFalse(sitestarlight.by_initial("E", names))
+        digits = [{"label": "2600.emu", "link": "/a"}, {"label": "81", "link": "/b"}]
+        self.assertTrue(sitestarlight.by_initial("0 to 9", digits))
+        self.assertFalse(sitestarlight.by_initial("Sony", names))
+        self.assertFalse(sitestarlight.by_initial("D", [{"label": "D", "items": names}]))
+
+    def test_emulator_letter_groups_are_marked(self):
+        side = sitestarlight.sidebar(_nav(), _present(_nav()), ANCHORS)
+        letters = {key: value for key, value in side["groups"].items()
+                   if key.startswith("Explore/Emulators/")}
+        self.assertTrue(letters)
+        for key, group in letters.items():
+            with self.subTest(group=key):
+                self.assertIs(group["crumb"], False)
+        self.assertIs(side["groups"]["Explore/Emulators"]["crumb"], True)
+        self.assertIs(side["groups"]["Explore/Systems"]["crumb"], True)
+
+    def test_the_route_middleware_skips_them(self):
+        self.assertIn("group?.crumb === false", ROUTE.read_text(encoding="utf-8"))
+
+
+class StructuredData(unittest.TestCase):
+    """3.5: the home page is the site, and a source repository states the
+    release, never a commit id, and no placeholder description."""
+
+    def test_versions_name_releases_only(self):
+        release = generate_site.release_versions
+        self.assertEqual(release({"core_version": "v0.1-12070"}), {"": "v0.1-12070"})
+        self.assertEqual(release({"core_version": "1.5.85"}), {"": "1.5.85"})
+        self.assertEqual(release({"core_version": "8dc77b0"}), {})
+        self.assertEqual(release({"core_version": "0.8.139-2-g25e1ee2fd5"}), {})
+        self.assertEqual(release({"core_version": "libretro branch"}), {})
+        self.assertEqual(release({"core_version": "edge"}), {})
+        self.assertEqual(release({}), {})
+        self.assertEqual(release({"core_version": {"standalone": "v1.1", "libretro": "4122fed"}}),
+                         {"standalone": "v1.1"})
+        # A pin of digits only, in the version: supermodel3.
+        self.assertEqual(release({"core_version": "0.3a-1481545-mm DirtBagXon (Sinden)",
+                                  "upstream_commit": "14815455dc28fca2c8662fb1ed99d447ecf8f364"}),
+                         {})
+        # A dated release whose digits start no pin stays.
+        self.assertEqual(release({"core_version": "20200712", "source_commit": "a1626f4e"}),
+                         {"": "20200712"})
+
+    def test_the_pin_is_never_a_version(self):
+        data = generate_site.emulator_structured_data({
+            "emulator": "Redream", "source": "https://github.com/x/redream",
+            "source_commit": "0123abcd",
+        })
+        self.assertEqual(data["about"], {"@type": "SoftwareSourceCode", "name": "Redream",
+                                         "codeRepository": "https://github.com/x/redream"})
+
+
+class _Head(HTMLParser):
+    def __init__(self) -> None:
+        super().__init__()
+        self.ld: list[dict] = []
+        self.sidebar: list[str] = []
+        self.tabs_current = 0
+        self._ld: list[str] | None = None
+        self._label: list[str] | None = None
+        self._tabs = False
+
+    def handle_starttag(self, tag: str, attrs: list) -> None:
+        a = dict(attrs)
+        if tag == "script" and a.get("type") == "application/ld+json":
+            self._ld = []
+        if tag == "summary":
+            self._label = []
+        if tag == "nav" and a.get("aria-label") == "Sections":
+            self._tabs = True
+        elif self._tabs and tag == "a" and a.get("aria-current"):
+            self.tabs_current += 1
+
+    def handle_endtag(self, tag: str) -> None:
+        if tag == "nav":
+            self._tabs = False
+        if tag == "script" and self._ld is not None:
+            self.ld.append(json.loads("".join(self._ld)))
+            self._ld = None
+        if tag == "summary" and self._label is not None:
+            self.sidebar.append(" ".join("".join(self._label).split()))
+            self._label = None
+
+    def handle_data(self, data: str) -> None:
+        for buffer in (self._ld, self._label):
+            if buffer is not None:
+                buffer.append(data)
+
+
+def _head(path: Path) -> _Head:
+    page = _Head()
+    page.feed(path.read_text(encoding="utf-8"))
+    return page
+
+
+@unittest.skipUnless((DIST / "index.html").is_file(), "site not built")
+class BuiltSite(unittest.TestCase):
+    def test_no_sidebar_group_is_named_by_a_number(self):
+        for path in sorted(DIST.rglob("*.html")):
+            labels = _head(path).sidebar
+            with self.subTest(page=str(path.relative_to(DIST))):
+                self.assertFalse([label for label in labels if re.fullmatch(r"\d+", label)])
+
+    def test_every_get_page_has_one_current_tab(self):
+        pages = sorted((DIST / "get").rglob("index.html"))
+        self.assertTrue(pages)
+        for path in [*pages, DIST / "404.html", DIST / "index.html"]:
+            with self.subTest(page=str(path.relative_to(DIST))):
+                self.assertEqual(_head(path).tabs_current, 1)
+
+    def test_the_home_page_is_the_site(self):
+        ld = _head(DIST / "index.html").ld
+        self.assertEqual(len(ld), 1)
+        self.assertEqual(ld[0]["@type"], "WebSite")
+        self.assertEqual(ld[0]["name"], "RetroBIOS")
+        self.assertNotIn("isPartOf", ld[0])
+
+    def test_no_source_repository_states_a_commit_or_a_description(self):
+        pins = {str(value).casefold()[:7]
+                for profile in load_emulator_profiles(str(REPO_ROOT / "emulators")).values()
+                for field in ("source_commit", "upstream_commit")
+                for value in (profile[field].values() if isinstance(profile.get(field), dict)
+                              else [profile.get(field)])
+                if value}
+        self.assertTrue(pins)
+        seen = 0
+        for path in sorted((DIST / "emulators").rglob("index.html")):
+            for data in _head(path).ld:
+                about = data.get("about") or []
+                for entry in about if isinstance(about, list) else [about]:
+                    seen += 1
+                    with self.subTest(page=str(path.relative_to(DIST)), repo=entry.get("codeRepository")):
+                        self.assertNotIn("description", entry)
+                        runs = re.findall(r"[0-9a-f]{7,40}", str(entry.get("version", "")).casefold())
+                        self.assertFalse([run for run in runs if run[:7] in pins])
+                        self.assertFalse(generate_site._COMMIT_ID.search(str(entry.get("version", ""))))
+        self.assertTrue(seen)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/wiki/testing-guide.md b/wiki/testing-guide.md
index 9091f6571..7ba0d734b 100644
--- a/wiki/testing-guide.md
+++ b/wiki/testing-guide.md
@@ -57,7 +57,7 @@ Every module in `tests/`, by the area it guards.
 | Installer and downloads | loopback server | `test_check_release`, `test_download`, `test_install`, `test_install_cores`, `test_install_experience`, `test_install_app`, `test_install_from`, `test_install_offline`, `test_install_selection`, `test_install_tui` |
 | Handheld launchers | a pty as the console, fake installer and firmware tools, stubbed PortMaster dialogs | `test_handheld_launchers`, `test_port` |
 | Truth and native export | synthetic + cached originals | `test_export_counts`, `test_export_native_layer`, `test_export_report`, `test_exporters`, `test_truth_data_dir_readers`, `test_truth_diff`, `test_truth_layout` |
-| Scrapers, upstream and provenance | inline sources, synthetic | `test_batocera_md5_list`, `test_check_freshness`, `test_contributing_text`, `test_coverage_cache`, `test_data_dir_refs`, `test_dataclass_defaults`, `test_dedup`, `test_doc_pages`, `test_doc_surfaces`, `test_elec_scrapers`, `test_fbneo_parser`, `test_find_pinned_revision`, `test_hash_merge`, `test_launchers`, `test_launchers_emudeck`, `test_launchers_recalbox`, `test_launchers_retrobat`, `test_launchers_retrodeck`, `test_launchers_retropie`, `test_launchers_rocknix`, `test_mame_devices`, `test_mame_parser`, `test_mame_ref_audit`, `test_optional_dependencies`, `test_profile_sync`, `test_prose_style`, `test_provenance`, `test_refresh_data_dirs`, `test_refresh_failures`, `test_refresh_stale`, `test_retrodeck_scraper_errors`, `test_romset_recipes`, `test_schema_semantic_gate`, `test_scraper_contract`, `test_site_availability`, `test_site_content_data`, `test_site_copy`, `test_site_cores`, `test_site_emulator_page`, `test_site_exports`, `test_site_funnel`, `test_site_images`, `test_site_picker`, `test_site_platform_hashes`, `test_site_r2_components`, `test_site_r2_css`, `test_site_r2_emulators`, `test_site_r2_entry`, `test_site_r2_gate`, `test_site_r2_nav`, `test_site_r2_p0`, `test_site_r2_reference`, `test_site_r2_systems`, `test_site_r2_wiki`, `test_site_r3_collection`, `test_site_r3_components`, `test_site_r3_css`, `test_site_r3_emulators`, `test_site_r3_entry`, `test_site_r3_nav`, `test_site_r3_p0`, `test_site_r3_reference`, `test_site_r3_systems`, `test_site_r3_wiki`, `test_site_r4_components`, `test_site_r4_css`, `test_site_r4_emulators`, `test_site_r4_entry`, `test_site_r4_merge`, `test_site_r4_p0`, `test_site_r4_reference`, `test_site_r4_search`, `test_site_r4_systems`, `test_site_r4_wiki`, `test_site_r5_components`, `test_site_r5_css`, `test_site_r5_emulators`, `test_site_r5_entry`, `test_site_r5_reference`, `test_site_r5_systems`, `test_site_r5_wiki`, `test_site_render`, `test_site_system_links`, `test_site_validation`, `test_site_weight`, `test_site_write`, `test_source_ref_targets`, `test_upstream`, `test_upstream_index`, `test_validate_pr`, `test_validate_pr_flow`, `test_validate_pr_hashes`, `test_workflow_paths` |
+| Scrapers, upstream and provenance | inline sources, synthetic | `test_batocera_md5_list`, `test_check_freshness`, `test_contributing_text`, `test_coverage_cache`, `test_data_dir_refs`, `test_dataclass_defaults`, `test_dedup`, `test_doc_pages`, `test_doc_surfaces`, `test_elec_scrapers`, `test_fbneo_parser`, `test_find_pinned_revision`, `test_hash_merge`, `test_launchers`, `test_launchers_emudeck`, `test_launchers_recalbox`, `test_launchers_retrobat`, `test_launchers_retrodeck`, `test_launchers_retropie`, `test_launchers_rocknix`, `test_mame_devices`, `test_mame_parser`, `test_mame_ref_audit`, `test_optional_dependencies`, `test_profile_sync`, `test_prose_style`, `test_provenance`, `test_refresh_data_dirs`, `test_refresh_failures`, `test_refresh_stale`, `test_retrodeck_scraper_errors`, `test_romset_recipes`, `test_schema_semantic_gate`, `test_scraper_contract`, `test_site_availability`, `test_site_content_data`, `test_site_copy`, `test_site_cores`, `test_site_emulator_page`, `test_site_exports`, `test_site_funnel`, `test_site_images`, `test_site_picker`, `test_site_platform_hashes`, `test_site_r2_components`, `test_site_r2_css`, `test_site_r2_emulators`, `test_site_r2_entry`, `test_site_r2_gate`, `test_site_r2_nav`, `test_site_r2_p0`, `test_site_r2_reference`, `test_site_r2_systems`, `test_site_r2_wiki`, `test_site_r3_collection`, `test_site_r3_components`, `test_site_r3_css`, `test_site_r3_emulators`, `test_site_r3_entry`, `test_site_r3_nav`, `test_site_r3_p0`, `test_site_r3_reference`, `test_site_r3_systems`, `test_site_r3_wiki`, `test_site_r4_components`, `test_site_r4_css`, `test_site_r4_emulators`, `test_site_r4_entry`, `test_site_r4_merge`, `test_site_r4_p0`, `test_site_r4_reference`, `test_site_r4_search`, `test_site_r4_systems`, `test_site_r4_wiki`, `test_site_r5_components`, `test_site_r5_css`, `test_site_r5_emulators`, `test_site_r5_entry`, `test_site_r5_reference`, `test_site_r5_search`, `test_site_r5_systems`, `test_site_r5_wiki`, `test_site_render`, `test_site_system_links`, `test_site_validation`, `test_site_weight`, `test_site_write`, `test_source_ref_targets`, `test_upstream`, `test_upstream_index`, `test_validate_pr`, `test_validate_pr_flow`, `test_validate_pr_hashes`, `test_workflow_paths` |
 
 ## Test architecture