diff --git a/scripts/generate_site.py b/scripts/generate_site.py
index df4b4a93..21588d04 100644
--- a/scripts/generate_site.py
+++ b/scripts/generate_site.py
@@ -2205,6 +2205,7 @@ def decorate_markdown_pages(docs: Path) -> dict[str, str]:
             description=description, structured=structured, terms=terms,
             search=authored.get("search") != "exclude",
             logo=str(authored.get("logo") or ""),
+            parent=authored.get("parent"),
         )
         write_decorated(docs / target, text)
         # One file per page: a page that gained or lost its components
@@ -7509,12 +7510,19 @@ def _emulator_nav(profiles: dict) -> list:
 
 
 def _system_nav(manufacturers: dict) -> list:
-    """Manufacturer pages, the machines apart from the game and engine trees."""
-    machines, games = [], []
+    """Manufacturer pages, the machines apart from the arcade boards and the
+    game and engine trees: an arcade page's crumb read "Consoles and
+    computers"."""
+    machines, arcade, games = [], [], []
     for mfr in sorted(manufacturers, key=str.casefold):
         entry = {mfr: f"systems/{_slug(mfr)}.md"}
-        (games if mfr in GAME_DATA_TOPS else machines).append(entry)
+        if mfr in GAME_DATA_TOPS:
+            games.append(entry)
+        else:
+            (arcade if mfr == "Arcade" else machines).append(entry)
     nav: list = ["systems/index.md", {"Consoles and computers": machines}]
+    if arcade:
+        nav.append({"Arcade": arcade})
     if games:
         nav.append({"Game engines and PC games": games})
     return nav
@@ -7904,6 +7912,20 @@ def _generate(args: argparse.Namespace) -> None:
             if stem in coverages:
                 raise RuntimeError(f"a system page takes the platform {stem}'s address")
             PART_PAGES.add(f"platforms/{stem}.md")
+            # One console of one setup's list, a reference: "playstation
+            # bios" found five setups' lists before the console's page.
+            # Weighed down, they still won on their title, which the page
+            # weight does not reach, and their file list is already kept out
+            # of the index: the title alone, found again on the setup's page
+            # and the console's, is all the search held of them.
+            SEARCH_DEMOTED.add(f"platforms/{stem}.md")
+            front = _front_matter(page)
+            if front:
+                page = page[page.find("\n---\n", 4) + 5:].lstrip("\n")
+            front.update(level="reference", search="exclude",
+                         parent={"label": cov["platform"], "link": f"{name}.md"})
+            page = "---\n" + yaml.safe_dump(front, sort_keys=False, allow_unicode=True) \
+                + "---\n\n" + page
             write_if_changed(str(docs / "platforms" / f"{stem}.md"), page)
         PAGE_DATA[f"platforms/{name}.md"] = platform_structured_data(name, cov)
 
diff --git a/scripts/sitestarlight.py b/scripts/sitestarlight.py
index 0b10e2f0..5623c57b 100644
--- a/scripts/sitestarlight.py
+++ b/scripts/sitestarlight.py
@@ -368,6 +368,17 @@ def split_title(markdown: str) -> tuple[str, str, str]:
 _CARD_NAME = re.compile(r'<h3[^>]*class="rb-file-title"(?![^>]*data-pagefind-ignore)[^>]*><code>([^<]+)</code>')
 
 
+def search_field(key: str, words: list[str]) -> str:
+    """A search field of the page, held in an attribute of an empty
+    element: the text of an element is indexed and shown as the result's
+    excerpt (a run of 250 file names). Pagefind splits several fields at a
+    comma, so a value carries none."""
+    value = " ".join(word.replace(",", " ") for word in words).strip()
+    if not value:
+        return ""
+    return f'\n<span data-pagefind-meta="{html.escape(f"{key}:{value}", quote=True)}" hidden></span>\n'
+
+
 def file_names_meta(body: str) -> str:
     """The names of the files a system page holds cards for, as a search
     field of the page. A page of 250 cards is long, and the search weighs a
@@ -375,9 +386,35 @@ def file_names_meta(body: str) -> str:
     after every short page citing the name. The field is weighted in the
     site's ranking (astro.config.mjs, metaWeights.files)."""
     names = sorted({unescape(name) for name in _CARD_NAME.findall(body)})
-    if not names:
-        return ""
-    return f'\n<span data-pagefind-meta="files" hidden>{html.escape(" ".join(names))}</span>\n'
+    return search_field("files", names)
+
+
+# systems/ page -> the platforms' own ids for the consoles it holds, built
+# on the first system page, once the generator has installed the sections.
+_page_aliases: dict[str, list[str]] = {}
+_page_aliases_built = [False]
+
+
+def page_aliases(rel: str) -> list[str]:
+    """The names the platforms file the consoles of a system page under
+    (psx, dreamcast, gba), from siterender.system_search_aliases(): "psx
+    bios" finds the PlayStation page though the page never says psx."""
+    if not _page_aliases_built[0]:
+        import siterender
+
+        by_page: dict[str, set[str]] = {}
+        for sys_id in list(siterender._system_page_map):
+            section = siterender.system_section(sys_id)
+            names = siterender.system_search_aliases(sys_id)
+            if not section or not names:
+                continue
+            target = siterender.console_href(*section).partition("#")[0]
+            by_page.setdefault(urllib.parse.unquote(target), set()).update(names)
+        _page_aliases.clear()
+        _page_aliases.update({page: sorted(names, key=str.casefold)
+                              for page, names in by_page.items()})
+        _page_aliases_built[0] = bool(siterender._system_page_map)
+    return list(_page_aliases.get(rel, []))
 
 
 _NEXT_STEPS = re.compile(r"^## Next steps\b[^\n]*\n+(?P<list>(?:[ \t]*[-*] .*\n?)+)", re.M)
@@ -407,9 +444,12 @@ def finalize_page(
     terms: dict[str, str],
     search: bool = True,
     logo: str = "",
+    parent: dict | None = None,
 ) -> tuple[str, str]:
     """The Starlight file for a page body: its path under the content
-    collection and its text."""
+    collection and its text. *parent* ({label, link}, the link written
+    relative to the page) is the page a part page belongs to: the route
+    middleware makes it the last crumb and marks it in the sidebar."""
     title, title_id, body = split_title(markdown)
     body = body.lstrip("\n")
     body = rewrite_links(body, rel)
@@ -427,7 +467,7 @@ def finalize_page(
     body = re.sub(r'<span class="(rb-badge(?![^"]*rb-badge-archive)[^"]*)"',
                   r'<span data-pagefind-ignore class="\1"', body)
     if rel.startswith("systems/"):
-        body += file_names_meta(body)
+        body += file_names_meta(body) + search_field("aliases", page_aliases(rel))
     components = used_components(body)
     stem = rel.rsplit(".", 1)[0]
     if components:
@@ -449,6 +489,9 @@ def finalize_page(
         front["level"] = level
     if logo:
         front["logo"] = logo
+    if parent:
+        front["parent"] = {"label": str(parent["label"]),
+                           "link": resolve(rel, str(parent["link"]))}
     if weight:
         front["searchWeight"] = weight
     if rel == NOT_FOUND:
diff --git a/tests/test_site_funnel.py b/tests/test_site_funnel.py
index 2a58bfa4..ee4a1bb7 100644
--- a/tests/test_site_funnel.py
+++ b/tests/test_site_funnel.py
@@ -209,10 +209,15 @@ class DeepLinksCarryALabel(unittest.TestCase):
             if level not in ("start", "setup"):
                 continue
             text = FENCED.sub("", page.read_text(encoding="utf-8"))
-            heading = ""
+            # The headings the line sits under, by depth: a system's h3 sits
+            # in the "## Reference: every file by system" section.
+            headings: dict[int, str] = {}
             for line in text.splitlines():
-                if re.match(r"#{1,3} ", line):
-                    heading = line.lstrip("#").strip()
+                level_match = re.match(r"(#{1,3}) ", line)
+                if level_match:
+                    depth = len(level_match[1])
+                    headings = {d: h for d, h in headings.items() if d < depth}
+                    headings[depth] = line.lstrip("#").strip()
                 for match in LINK.finditer(line):
                     target = by_url.get(match.group(1))
                     if target not in levels:
@@ -221,7 +226,8 @@ class DeepLinksCarryALabel(unittest.TestCase):
                     if ORDER.index(deeper) - ORDER.index(level) < 2:
                         continue
                     label = f"{generate_site.LEVELS[deeper]}:"
-                    if label not in line[: match.start()] and not heading.startswith(label):
+                    if label not in line[: match.start()] and not any(
+                            heading.startswith(label) for heading in headings.values()):
                         offenders.append(f"{page.relative_to(DOCS)}: {match.group(0)}")
         self.assertEqual(offenders, [], "\n".join(offenders[:30]))
 
diff --git a/tests/test_site_r3_nav.py b/tests/test_site_r3_nav.py
new file mode 100644
index 00000000..9b9890c3
--- /dev/null
+++ b/tests/test_site_r3_nav.py
@@ -0,0 +1,217 @@
+"""Navigation and search (round 3, package 3).
+
+"playstation bios" found five setups' lists for the console before its own
+page: the pages a setup's list moves a console to weighed 1.5, three times a
+reference page. The file names a system page holds were the text of a hidden
+span, so the search showed them as the excerpt. Start here looped: First
+install's "Next steps" pointed back to Get your files, Is it legal? to Common
+questions, and both pages had the same page as previous and next. A part
+page had no crumb to the page it belongs to and nothing marked in the
+sidebar. "psx" or "dc" found nothing, though every platform files the
+console under that name. These tests read the generator and, where they
+are built, the pages and the site.
+"""
+
+from __future__ import annotations
+
+import ast
+import re
+import sys
+import unittest
+from html import unescape
+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  # noqa: E402
+
+SEARCH_GATE = REPO_ROOT / "website" / "tools" / "search_gate.py"
+DOCS = REPO_ROOT / "website" / "src" / "content" / "docs"
+DIST = REPO_ROOT / "website" / "dist"
+ROUTE = REPO_ROOT / "website" / "src" / "routeData.ts"
+CONTENT_CONFIG = REPO_ROOT / "website" / "src" / "content.config.ts"
+START_HERE = [
+    "/retrobios/", "/retrobios/wiki/what-are-bios-files/", "/retrobios/which-pack/",
+    "/retrobios/wiki/first-install/", "/retrobios/wiki/troubleshooting/",
+    "/retrobios/wiki/faq/", "/retrobios/wiki/legal/", "/retrobios/wiki/glossary/",
+    "/retrobios/platforms/",
+]
+
+
+def _front(text: str) -> str:
+    end = text.find("\n---\n", 4)
+    return text[4:end] if text.startswith("---\n") and end != -1 else ""
+
+
+def _moved_platform_pages() -> list[Path]:
+    platforms = set(list_registered_platforms(str(REPO_ROOT / "platforms"), include_archived=True))
+    folder = DOCS / "platforms"
+    if not folder.is_dir():
+        return []
+    return [path for path in sorted(folder.glob("*.md*"))
+            if path.stem not in platforms and path.stem != "index"]
+
+
+class MetaFields(unittest.TestCase):
+    def test_file_names_are_an_attribute_not_text(self) -> None:
+        body = ('<h3 class="rb-file-title"><code>scph5501.bin</code></h3>'
+                '<h3 class="rb-file-title"><code>a,b.bin</code></h3>')
+        meta = sitestarlight.file_names_meta(body)
+        self.assertIn('data-pagefind-meta="files:a b.bin scph5501.bin"', meta)
+        self.assertRegex(meta, r"<span [^>]*hidden></span>")
+
+    def test_a_field_escapes_its_value(self) -> None:
+        meta = sitestarlight.search_field("aliases", ['a"b', "c&d"])
+        self.assertIn('data-pagefind-meta="aliases:a&quot;b c&amp;d"', meta)
+
+    def test_an_empty_field_writes_nothing(self) -> None:
+        self.assertEqual(sitestarlight.search_field("aliases", []), "")
+        self.assertEqual(sitestarlight.file_names_meta("<p>no card</p>"), "")
+
+    def test_system_pages_carry_the_platforms_names(self) -> None:
+        page = DOCS / "systems" / "sony-playstation.md"
+        if not page.is_file():
+            self.skipTest("site pages not generated")
+        text = page.read_text(encoding="utf-8")
+        match = re.search(r'data-pagefind-meta="aliases:([^"]*)"', text)
+        self.assertIsNotNone(match, "no aliases field on the PlayStation page")
+        self.assertIn("psx", unescape(match[1]).split())
+        dreamcast = (DOCS / "systems" / "sega-dreamcast.md").read_text(encoding="utf-8")
+        self.assertRegex(dreamcast, r'data-pagefind-meta="aliases:[^"]*\bdc\b')
+
+
+class MovedPlatformPages(unittest.TestCase):
+    def test_a_setups_list_for_one_console_is_a_reference(self) -> None:
+        source = Path(generate_site.__file__).read_text(encoding="utf-8")
+        block = source[source.index("for stem, page in moved.items():"):]
+        block = block[: block.index("PAGE_DATA[f\"platforms/{name}.md\"]")]
+        self.assertIn('SEARCH_DEMOTED.add(f"platforms/{stem}.md")', block)
+        self.assertIn('level="reference"', block)
+        self.assertIn('search="exclude"', block)
+        self.assertIn("parent=", block)
+
+    def test_generated_pages_weigh_as_references_and_name_their_setup(self) -> None:
+        pages = _moved_platform_pages()
+        if not pages:
+            self.skipTest("site pages not generated")
+        for path in pages:
+            front = _front(path.read_text(encoding="utf-8"))
+            with self.subTest(page=path.name):
+                self.assertIn("\nlevel: reference\n", f"\n{front}\n")
+                self.assertIn("\nsearchWeight: 0.5\n", f"\n{front}\n")
+                # The title alone was indexed, and it outranked the console.
+                self.assertIn("\npagefind: false\n", f"\n{front}\n")
+                self.assertRegex(front, r"parent:\n  label: .+\n  link: /retrobios/platforms/[a-z0-9_-]+/\n")
+
+    def test_parent_link_resolves_against_the_page(self) -> None:
+        _target, text = sitestarlight.finalize_page(
+            "platforms/retroarch-sony-playstation.md", "# RetroArch: Sony PlayStation\n\nBody.\n",
+            level="reference", weight=0.5, browser_title="x", description="d",
+            structured={}, terms={}, parent={"label": "RetroArch", "link": "retroarch.md"},
+        )
+        self.assertIn("parent:\n  label: RetroArch\n  link: /retrobios/platforms/retroarch/\n", text)
+
+    def test_the_schema_accepts_parent(self) -> None:
+        self.assertRegex(CONTENT_CONFIG.read_text(encoding="utf-8"),
+                         r"parent: z\.object\(\{ label: z\.string\(\), link: z\.string\(\) \}\)")
+
+
+class ArcadeGroup(unittest.TestCase):
+    def test_arcade_is_not_a_console_or_computer(self) -> None:
+        nav = generate_site._system_nav({"Sony": {}, "Arcade": {}, "Sega": {}})
+        groups = {next(iter(entry)): entry[next(iter(entry))] for entry in nav if isinstance(entry, dict)}
+        self.assertEqual(groups["Arcade"], [{"Arcade": "systems/arcade.md"}])
+        self.assertNotIn({"Arcade": "systems/arcade.md"}, groups["Consoles and computers"])
+
+
+class RouteMiddleware(unittest.TestCase):
+    def test_next_steps_link_is_kept_only_forward(self) -> None:
+        source = ROUTE.read_text(encoding="utf-8")
+        self.assertIn("target <= position", source)
+
+    def test_parent_is_a_crumb_and_marked(self) -> None:
+        source = ROUTE.read_text(encoding="utf-8")
+        self.assertIn("route.entry.data.parent", source)
+        self.assertIn("markCurrent(route.sidebar", source)
+
+
+def _gate_queries() -> dict:
+    """The search gate's QUERIES, read from its source: the tool is run
+    with node beside it, not imported as a package."""
+    tree = ast.parse(SEARCH_GATE.read_text(encoding="utf-8"))
+    for node in tree.body:
+        if isinstance(node, ast.AnnAssign) and getattr(node.target, "id", "") == "QUERIES":
+            return ast.literal_eval(node.value)
+    raise AssertionError("no QUERIES in search_gate.py")
+
+
+class SearchGateQueries(unittest.TestCase):
+    def test_the_audits_queries_are_gated(self) -> None:
+        for query in ("playstation bios", "dreamcast bios", "neo geo bios", "bios not found",
+                      "offline install", "r36s", "wonderswan color", "dc bios missing",
+                      "which mame version", "psx bios"):
+            self.assertIn(query, _gate_queries())
+
+    def test_prefixes_match_a_consoles_own_page(self) -> None:
+        pages, _rank = _gate_queries()["playstation bios"]
+        self.assertTrue(any("systems/sony-playstation/".startswith(p) for p in pages))
+
+
+def _html(url: str) -> str:
+    rel = url[len("/retrobios/"):]
+    path = DIST / rel / "index.html"
+    return path.read_text(encoding="utf-8") if path.is_file() else ""
+
+
+def _pagination(text: str) -> tuple[str | None, str | None]:
+    start = text.find('<div class="pagination-links')
+    if start == -1:
+        return None, None
+    links = text[start:text.find("</footer>", start)]
+    prev = re.search(r'<a href="([^"]+)"[^>]*rel="prev"', links)
+    nxt = re.search(r'<a href="([^"]+)"[^>]*rel="next"', links)
+    return (prev[1] if prev else None), (nxt[1] if nxt else None)
+
+
+@unittest.skipUnless((DIST / "index.html").is_file(), "site not built")
+class BuiltSite(unittest.TestCase):
+    def test_next_from_home_reads_start_here_once(self) -> None:
+        seen, url = [], "/retrobios/"
+        while url and url not in seen and len(seen) < 20:
+            seen.append(url)
+            url = _pagination(_html(url))[1]
+        self.assertEqual(seen[: len(START_HERE)], START_HERE)
+        self.assertEqual(len(seen), len(set(seen)))
+
+    def test_no_page_has_the_same_previous_and_next(self) -> None:
+        same = []
+        for path in DIST.rglob("index.html"):
+            prev, nxt = _pagination(path.read_text(encoding="utf-8"))
+            if prev and prev == nxt:
+                same.append(str(path.relative_to(DIST)))
+        self.assertEqual(same, [])
+
+    def test_search_fields_hold_no_text(self) -> None:
+        texts = []
+        for path in (DIST / "systems").rglob("index.html"):
+            for match in re.finditer(r"<(\w+)[^>]*data-pagefind-meta=[^>]*>([^<]*)</\1>",
+                                     path.read_text(encoding="utf-8")):
+                if match[2].strip():
+                    texts.append(str(path.relative_to(DIST)))
+        self.assertEqual(texts, [])
+
+    def test_a_setups_console_page_names_its_setup(self) -> None:
+        text = _html("/retrobios/platforms/retroarch-sony-playstation/")
+        if not text:
+            self.skipTest("no RetroArch PlayStation page")
+        crumbs = re.search(r'<nav[^>]*class="[^"]*rb-breadcrumbs[^"]*"[^>]*>(.*?)</nav>', text, re.S)
+        self.assertIsNotNone(crumbs)
+        self.assertIn('href="/retrobios/platforms/retroarch/"', crumbs[1])
+        self.assertRegex(text, r'<a href="/retrobios/platforms/retroarch/"[^>]*aria-current="page"')
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/website/src/content.config.ts b/website/src/content.config.ts
index 581aeb95..5c215a88 100644
--- a/website/src/content.config.ts
+++ b/website/src/content.config.ts
@@ -19,6 +19,9 @@ export const collections = {
 				// A mark drawn beside the title (a platform's logo), a path under
 				// the site root such as assets/logos/batocera.svg.
 				logo: z.string().optional(),
+				// The page a part page belongs to (a console of a setup's list),
+				// read by routeData.ts: the last crumb, marked in the sidebar.
+				parent: z.object({ label: z.string(), link: z.string() }).optional(),
 			}),
 		}),
 	}),
diff --git a/website/src/routeData.ts b/website/src/routeData.ts
index de7626fb..8b56eca7 100644
--- a/website/src/routeData.ts
+++ b/website/src/routeData.ts
@@ -8,7 +8,12 @@
 // - a pruned sidebar: in the tabs listing every system and emulator, a
 //   group that does not hold the page becomes one link to its overview, so
 //   an emulator page does not carry the links of every other emulator. The
-//   groups of the other tabs stay groups.
+//   groups of the other tabs stay groups;
+// - a part page (one console of a setup's list) names the page it belongs
+//   to in its `parent:` front matter: that page is its last crumb, and its
+//   sidebar entry is marked when the part page has none of its own;
+// - a page's "Next steps" link is its next only when it reads forward: one
+//   pointing back to an earlier page of the run made Start here loop.
 import { defineRouteMiddleware, type StarlightRouteData } from '@astrojs/starlight/route-data';
 import sidebar from './generated/sidebar.json' with { type: 'json' };
 
@@ -69,6 +74,18 @@ const folderTrail = (entries: Entry[], labels: string[], folder: string): Crumb[
 	return [];
 };
 
+// The parent's entry marked current, for a page the sidebar does not list.
+const markCurrent = (entries: Entry[], href: string): Entry[] =>
+	entries.map((entry) =>
+		entry.type === 'link'
+			? entry.href === href
+				? { ...entry, isCurrent: true }
+				: entry
+			: { ...entry, entries: markCurrent(entry.entries, href) },
+	);
+
+const bare = (link: string) => withBase(link).replace(/[?#].*$/, '');
+
 const asLink = (entry: { label: string; link: string }): Link => ({
 	type: 'link',
 	label: entry.label,
@@ -84,6 +101,8 @@ export const onRequest = defineRouteMiddleware(async (context, next) => {
 	const path = context.url.pathname;
 
 	const topic = context.locals.starlightSidebarTopics?.topics.find((t) => t.isCurrent);
+	const parent = route.entry.data.parent;
+	if (parent && !route.sidebar.some(holdsCurrent)) route.sidebar = markCurrent(route.sidebar, bare(parent.link));
 	const crumbs: Crumb[] = [];
 	if (topic && withBase(topic.link) !== path && route.id !== '404') {
 		crumbs.push({ label: topic.label, href: withBase(topic.link) });
@@ -98,6 +117,10 @@ export const onRequest = defineRouteMiddleware(async (context, next) => {
 			if (crumb.href && crumb.href === crumbs.at(-1)?.href) continue;
 			crumbs.push(crumb);
 		}
+		const parentHref = parent ? withBase(parent.link) : undefined;
+		if (parent && parentHref !== path && parentHref !== crumbs.at(-1)?.href) {
+			crumbs.push({ label: parent.label, href: parentHref });
+		}
 	}
 	context.locals.rbBreadcrumbs = crumbs;
 
@@ -105,7 +128,12 @@ export const onRequest = defineRouteMiddleware(async (context, next) => {
 	const run = RUNS.find((pages) => pages.some((entry) => withBase(entry.link) === path));
 	const position = run ? run.findIndex((entry) => withBase(entry.link) === path) : -1;
 	if (prev === undefined) route.pagination.prev = run && position > 0 ? asLink(run[position - 1]) : undefined;
-	if (following === undefined) route.pagination.next = run && position < run.length - 1 ? asLink(run[position + 1]) : undefined;
+	const inOrder = run && position < run.length - 1 ? asLink(run[position + 1]) : undefined;
+	if (following === undefined) route.pagination.next = inOrder;
+	else if (run && typeof following === 'object' && following.link) {
+		const target = run.findIndex((entry) => bare(entry.link) === bare(following.link));
+		if (target !== -1 && target <= position) route.pagination.next = inOrder;
+	}
 
 	route.sidebar = prune(route.sidebar, [topic?.label ?? '']);
 });
diff --git a/website/tools/search_gate.py b/website/tools/search_gate.py
index 1a3a8a6a..4d63160c 100644
--- a/website/tools/search_gate.py
+++ b/website/tools/search_gate.py
@@ -26,13 +26,28 @@ QUERIES: dict[str, tuple[tuple[str, ...], int]] = {
     "neogeo.zip": (("emulators/fbneo", "emulators/mame", "systems/snk/", "systems/arcade"), 1),
     "retroarch system folder": (("platforms/retroarch/",), 1),
     "installer": (("wiki/installer/", "wiki/first-install/"), 1),
-    # The file's card on its system page, where it is downloaded.
-    "scph5501": (("systems/sony/",), 3),
+    # The file's card on its system page, where it is downloaded. "systems/sony"
+    # holds the manufacturer page and the console's own (systems/sony-playstation/).
+    "scph5501": (("systems/sony",), 3),
     "md5": (("wiki/verification-modes/",), 1),
     "where do bios files go": (("which-pack/", "wiki/first-install/"), 1),
     "dolphin": (("emulators/dolphin/",), 1),
     "duckstation": (("emulators/duckstation/",), 1),
-    "playstation bios": (("systems/sony/",), 3),
+    # A console and "bios": the console's page, before any setup's list for it.
+    "playstation bios": (("systems/sony",), 3),
+    "dreamcast bios": (("systems/sega",), 3),
+    "neo geo bios": (("systems/snk",), 3),
+    "wonderswan color": (("systems/bandai",), 3),
+    # The platforms' own names for a console (psx, dc, gba), a search field
+    # of its page.
+    "psx bios": (("systems/sony",), 3),
+    "dc bios missing": (("systems/sega",), 3),
+    "gba bios": (("systems/nintendo",), 3),
+    "bios not found": (("wiki/troubleshooting/",), 3),
+    "offline install": (("wiki/installer/",), 3),
+    "which mame version": (("wiki/technical-faq/",), 3),
+    # A device name: the guide of the handhelds that run it.
+    "r36s": (("platforms/", "which-pack/"), 3),
     "steam deck": (("platforms/emudeck/", "platforms/retrodeck/", "which-pack/"), 1),
     "knulli": (("platforms/knulli/",), 1),
 }
diff --git a/wiki/testing-guide.md b/wiki/testing-guide.md
index 251eb6a9..2cee4434 100644
--- a/wiki/testing-guide.md
+++ b/wiki/testing-guide.md
@@ -54,7 +54,7 @@ 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_offline`, `test_install_selection` |
 | Handheld port | stubbed PortMaster dialogs, fake installer | `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_p0`, `test_site_render`, `test_site_system_links`, `test_site_validation`, `test_site_weight`, `test_site_write`, `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_nav`, `test_site_r3_p0`, `test_site_render`, `test_site_system_links`, `test_site_validation`, `test_site_weight`, `test_site_write`, `test_upstream`, `test_upstream_index`, `test_validate_pr`, `test_validate_pr_flow`, `test_validate_pr_hashes`, `test_workflow_paths` |
 
 ## Test architecture