diff --git a/tests/test_doc_pages.py b/tests/test_doc_pages.py
index 0b58a1f26..ef9c65877 100644
--- a/tests/test_doc_pages.py
+++ b/tests/test_doc_pages.py
@@ -491,9 +491,13 @@ class CoreResolutionWrittenOnce(unittest.TestCase):
         import common
 
         self.assertNotIn("cores: [list]", _page("architecture.md"))
-        source = inspect.getsource(common.resolve_platform_cores)
+        # resolve_platform_cores narrows by target, _platform_profiles holds
+        # the strategies.
+        source = inspect.getsource(common._platform_profiles)
         self.assertIn('not p.get("built_by")', source)
         self.assertIn('"retroarch" in core_set', source)
+        self.assertIn('config.get("installable_cores")', source)
+        self.assertIn("downloadable_on", inspect.getsource(common.resolve_platform_cores))
         naming = set()
         for path in (ROOT / "platforms").glob("*.yml"):
             config = yaml.safe_load(path.read_text(encoding="utf-8")) or {}
@@ -504,10 +508,14 @@ class CoreResolutionWrittenOnce(unittest.TestCase):
         bullet = next(p for p in section.split("\n- ") if p.startswith("**Explicit list**"))
         used_by = re.search(r"Used by ([^.]+)\.", bullet.replace("\n", " ")).group(1)
         names = [n.strip().lower() for n in used_by.split(",")]
-        self.assertIn("the last\n  four", bullet)
-        self.assertEqual(set(names[-4:]), naming)
+        words = {2: "two", 3: "three", 4: "four", 5: "five"}
+        counted = re.search(r"\(the last\s+(\w+)\)", bullet).group(1)
+        self.assertEqual(counted, words[len(naming)])
+        self.assertEqual(set(names[-len(naming):]), naming)
         libretro = next(p for p in section.split("\n- ") if p.startswith("**all_libretro**"))
         self.assertIn("built_by", libretro)
+        for name in ("installable_cores", "downloadable_on", "downloaded_cores"):
+            self.assertIn(f"`{name}`", bullet)
 
 
 class ExitStatusTable(unittest.TestCase):
diff --git a/wiki/adding-a-platform.md b/wiki/adding-a-platform.md
index 3ca46cac4..1154990e3 100644
--- a/wiki/adding-a-platform.md
+++ b/wiki/adding-a-platform.md
@@ -195,12 +195,15 @@ resolved. Three strategies exist:
 
 - **Explicit list**: `cores: [beetle_psx, dolphin, ...]` - match by profile key name
   or by any name in a profile's `cores:`. When a profile's `built_by` names this
-  platform, that profile answers for the name. Used by Batocera, Recalbox, RetroBat,
-  RomM, KNULLI, AmberELEC, EmuELEC, MinUI, NextUI, MyMinUI, RetroPie, EmuDeck,
-  RetroDECK, ROCKNIX. A list that names `retroarch` (the last
-  four) also takes every libretro profile, as `all_libretro` does, plus the
-  libretro builds whose `built_by` names this platform (ROCKNIX's
-  `yabadabadoo`). An empty list
+  platform, that profile answers for the name (ROCKNIX's `yabadabadoo`). Used by
+  Batocera, Recalbox, RetroBat, RomM, KNULLI, AmberELEC, EmuELEC, MinUI, NextUI,
+  MyMinUI, ROCKNIX, RetroPie, EmuDeck, RetroDECK. A list that names `retroarch`
+  (the last three) also takes every libretro profile, as `all_libretro` does,
+  plus the libretro builds whose `built_by` names this platform. A name in `installable_cores`, a buildbot core the
+  platform's RetroArch downloads, designates libretro builds only. Under
+  `--target` such a core counts only on the boards whose downloader offers one
+  of its names (`downloadable_on`), and the install list gives those boards in
+  `downloaded_cores`. An empty list
   (BizHawk, MiSTer FPGA) resolves no profile, and the pack holds the platform's own
   files.
 - **all_libretro**: `cores: all_libretro` - every profile whose `type` contains