diff --git a/emulators/ares.yml b/emulators/ares.yml
index 35623cf00..fe77a7e21 100644
--- a/emulators/ares.yml
+++ b/emulators/ares.yml
@@ -98,6 +98,53 @@ config_reads:
           - "PlayStation/Firmware/BIOS.Europe"
         source_ref: "desktop-ui/emulator/playstation.cpp:19-23, 87-101"
         condition: "the disc's region"
+  - file: "settings.bml"
+    platforms: [emudeck]
+    revision: "0aafd85789215e84e1e43415c07d4c88461b7899"
+    revision_from: "v148, the tarball the Flathub manifest dev.ares.ares builds at 1259ea09 (EmuDeck installs the Flathub app)"
+    source_ref: "desktop-ui/desktop-ui.cpp:9-35, 100-103, 114, desktop-ui/settings/settings.cpp:31-35, 42, 223-235, nall/nall/path.cpp:123-142"
+    keys:
+      - key: "ColecoVision/Firmware/BIOS.World"
+        source_ref: "desktop-ui/emulator/colecovision.cpp:10-12, 42-50, mia/system/colecovision.cpp:7-9"
+      - key: "MSX/Firmware/BIOS.Japan"
+        source_ref: "desktop-ui/emulator/msx.cpp:16-19, 44-53"
+      - key: "FamicomDiskSystem/Firmware/BIOS.Japan"
+        source_ref: "desktop-ui/emulator/famicom-disk-system.cpp:17-19, 89-97"
+      - key:
+          - "Nintendo64DD/Firmware/BIOS.Japan"
+          - "Nintendo64DD/Firmware/BIOS.US"
+          - "Nintendo64DD/Firmware/BIOS.DEV"
+        source_ref: "desktop-ui/emulator/nintendo-64dd.cpp:17-19, 59-79"
+        condition: "the game's region"
+      - key: "GameBoyAdvance/Firmware/BIOS.World"
+        source_ref: "desktop-ui/emulator/game-boy-advance.cpp:12-14, 55-63"
+      - key:
+          - "MasterSystem/Firmware/BIOS.US"
+          - "MasterSystem/Firmware/BIOS.Japan"
+          - "MasterSystem/Firmware/BIOS.Europe"
+        source_ref: "desktop-ui/emulator/master-system.cpp:12-16, 93-107"
+        condition: "the game's region"
+      - key: "GameGear/Firmware/BIOS.World"
+        source_ref: "desktop-ui/emulator/game-gear.cpp:10-12, 30-40"
+      - key:
+          - "MegaCD/Firmware/BIOS.US"
+          - "MegaCD/Firmware/BIOS.Japan"
+          - "MegaCD/Firmware/BIOS.Europe"
+        source_ref: "desktop-ui/emulator/mega-cd.cpp:17-19, 63-83"
+        condition: "the disc's region"
+      - key: "NeoGeoAES/Firmware/BIOS.World"
+        source_ref: "desktop-ui/emulator/neo-geo-aes.cpp:14, 37-51, mia/system/neo-geo-aes.cpp:8-34"
+        condition: "a .zip path is searched for neo-epo.bin, any other path is read whole"
+      - key: "NeoGeoPocket/Firmware/BIOS.World"
+        source_ref: "desktop-ui/emulator/neo-geo-pocket.cpp:10-12, 32-40"
+      - key: "NeoGeoPocketColor/Firmware/BIOS.World"
+        source_ref: "desktop-ui/emulator/neo-geo-pocket-color.cpp:10-12, 32-40"
+      - key:
+          - "PlayStation/Firmware/BIOS.US"
+          - "PlayStation/Firmware/BIOS.Japan"
+          - "PlayStation/Firmware/BIOS.Europe"
+        source_ref: "desktop-ui/emulator/playstation.cpp:18-20, 78-98"
+        condition: "the disc's region"
 
 notes: |
   Multi-system emulator by Near (byuu), successor to higan/bsnes. Focuses on
diff --git a/emulators/gzdoom.yml b/emulators/gzdoom.yml
index d958edfa8..92672ba40 100644
--- a/emulators/gzdoom.yml
+++ b/emulators/gzdoom.yml
@@ -27,6 +27,18 @@ config_reads:
         source_ref: "src/common/utility/findfile.cpp:224-260"
       - key: "[SoundfontSearch.Directories] Path"
         source_ref: "src/common/audio/music/i_soundfont.cpp:393-410"
+  - file: "gzdoom.ini"
+    platforms: [retrodeck]
+    revision: "99aa489d09015a95bb78df2b30ede29f328cc874"
+    revision_from: "GZDoom g4.14.2-m in the gzdoom binary RetroDECK's components carry at fcd0d729 (gzdoom/rd_assets/gzdoom_release/bin/gzdoom), the g4.14.2 tag"
+    source_ref: "src/gameconfigfile.cpp:89-102, 894-904, src/common/platform/posix/unix/i_specialpaths.cpp:166-169"
+    keys:
+      - key: "[IWADSearch.Directories] Path"
+        source_ref: "src/d_iwad.cpp:457-471"
+      - key: "[FileSearch.Directories] Path"
+        source_ref: "src/common/utility/findfile.cpp:224-260"
+      - key: "[SoundfontSearch.Directories] Path"
+        source_ref: "src/common/audio/music/i_soundfont.cpp:393-410"
 
 notes: |
   Doom-engine source port by Christoph Oelckers. Supports Doom, Heretic,
diff --git a/emulators/hatari.yml b/emulators/hatari.yml
index 940f07f95..207a7a1f1 100644
--- a/emulators/hatari.yml
+++ b/emulators/hatari.yml
@@ -76,6 +76,14 @@ config_reads:
     keys:
       - key: "[ROM] szTosImageFileName"
         source_ref: "upstream src/configuration.c:480, upstream src/tos.c:975-986"
+  - file: "*.cfg"
+    platforms: [retrobat]
+    revision: "4371dcd647fc85d31c0629400adaeaa4212040d9"
+    revision_from: "Hatari v2.4.1, compiled Aug 3 2022, in hatari.exe of RetroBat's stable hatari.7z (2026-04-04), the v2.4.1 tag"
+    source_ref: "upstream src/options.c:228-229, 1099-1108, upstream src/configuration.c:967-976, 1024"
+    keys:
+      - key: "[ROM] szTosImageFileName"
+        source_ref: "upstream src/configuration.c:413, 884, upstream src/tos.c:942-955"
 
 notes: |
   The main branch of libretro/hatari is the upstream Hatari tree at
diff --git a/emulators/hatari2014.yml b/emulators/hatari2014.yml
index f9e2e2ecf..7970e7a32 100644
--- a/emulators/hatari2014.yml
+++ b/emulators/hatari2014.yml
@@ -22,6 +22,17 @@ systems:
   - atari-tt
   - atari-falcon
 
+config_reads:
+  - file: "core options"
+    platforms: [retrobat]
+    revision: "ab55c3ed0e620c91e7f059a6d3fbef7acf9bfca8"
+    revision_from: "library_version 1.8 ab55c3e of hatari2014_libretro.dll from the libretro buildbot windows x86_64 nightly (2026-11-10), which RetroBat installs when its own repository has no copy"
+    source_ref: "source libretro/libretro.c:264-300, 372, 393-413, 437-440, 984-1001, 1418, source libretro/libretro_core_options.h:129-145"
+    keys:
+      - key: "hatari_tosimage"
+        source_ref: "source libretro/libretro.c:288-299, 617, 639-649, 1612-1617, source src/main.c:913-917, source src/tos.c:575-590"
+        condition: "a value other than default is a file of system/hatari/tos ending in img"
+
 notes: |
   Hatari 2014 is the libretro port of Hatari 1.8.0 (src/includes/version.h:16),
   the July 2014 release, kept on the hitari2014-mercurial branch of
diff --git a/emulators/hatarib.yml b/emulators/hatarib.yml
index 502f6fec2..f2bf7913f 100644
--- a/emulators/hatarib.yml
+++ b/emulators/hatarib.yml
@@ -20,6 +20,17 @@ systems:
   - atari-tt
   - atari-falcon
 
+config_reads:
+  - file: "core options"
+    platforms: [retrobat]
+    revision: "9c5ee608504d7e174dce99ac9237151863d78347"
+    revision_from: "library_version v0.3 9c5ee60 of hatarib_libretro.dll in RetroBat's stable cores/hatarib_libretro.dll.zip (2026-04-04), the 0.3 tag"
+    source_ref: "core/core.c:963-976, core/core_config.c:961-969, 985, 1286-1318, 1408-1413, hatari/src/main.c:898, 921-925, 1019"
+    keys:
+      - key: "hatarib_tos"
+        source_ref: "core/core_config.c:1082-1104, 1293-1318, core/core_file.c:256-259, 707-716, 763-769, hatari/src/tos.c:996-1056"
+        condition: "<tos.img> is offered only when system/tos.img exists, a hatarib/ value only for a file with an img, rom, bin or tos extension"
+
 notes: |
   hatariB carries Hatari 2.6.1 in its hatari/ directory, every change
   fenced by __LIBRETRO__ (DEVELOP.md:7-14, DEVELOP.md:44-48), and
diff --git a/emulators/kronos.yml b/emulators/kronos.yml
index 16ed978ee..8cef01caf 100644
--- a/emulators/kronos.yml
+++ b/emulators/kronos.yml
@@ -20,6 +20,19 @@ systems:
   - sega-saturn
   - sega-stv
 
+config_reads:
+  - file: "kronos.ini"
+    platforms: [retrobat]
+    revision: "6750417f3d6fef1b7be9adf52e707cc78aa41ee0"
+    revision_from: "Kronos 2.7.0 without a commit id in kronos.exe of RetroBat's stable kronos.7z, linked 2024-12-31: the last FCare/Kronos commit before that date, the cited files unchanged from aca9865c to the 2.7.0_official_release tag 58352d6d"
+    source_ref: "upstream yabause/src/port/qt/Settings.cpp:50-61, 95-103, upstream yabause/src/port/qt/Settings.h:25-26, upstream yabause/src/CMakeLists.txt:763, upstream yabause/src/port/qt/main.cpp:55-57"
+    keys:
+      - key: "[1.0] General\\EnableEmulatedBios"
+        source_ref: "upstream yabause/src/port/qt/YabauseThread.cpp:392-393"
+      - key: "[1.0] General\\Bios"
+        source_ref: "upstream yabause/src/port/qt/YabauseThread.cpp:394-395, upstream yabause/src/port/qt/VolatileSettings.cpp:20-27, upstream yabause/src/ctrl/src/yabause.c:497-509, 575-587, 626-630, upstream yabause/src/sys/memory/src/memory.c:1343-1346"
+        condition: "General\\EnableEmulatedBios false; an empty path runs the HLE BIOS, a path that fails to load stops init"
+
 notes: |
   Kronos is a Sega Saturn and ST-V arcade emulator by FCare, forked from
   Yabause. Requires OpenGL 4.3 compute shaders.
diff --git a/emulators/lrps2.yml b/emulators/lrps2.yml
index d8541e5d8..22c17833d 100644
--- a/emulators/lrps2.yml
+++ b/emulators/lrps2.yml
@@ -30,6 +30,15 @@ config_reads:
     keys:
       - key: "pcsx2_bios"
         source_ref: "libretro/main.cpp:525-536, 2552-2560"
+  - file: "core options"
+    platforms: [retrodeck]
+    revision: "14d19f8339e3646b645c1c33e612b1888e632145"
+    revision_from: "library_version 14d19f8 of pcsx2_libretro.so in the buildbot's stable 1.22.2 RetroArch_cores.7z (2025-11-20), which RetroDECK's retroarch component installs (retroarch/component_recipe.json at fcd0d729)"
+    source_ref: "libretro/main.cpp:341, 1915-1926, 2013"
+    keys:
+      - key: "pcsx2_bios"
+        source_ref: "libretro/main.cpp:360-365, 1801-1830, pcsx2/VMManager.cpp:247-256, 1076-1092, 601, pcsx2/Pcsx2Config.cpp:887-891, 995-1000, pcsx2/ps2/BiosTools.cpp:267-281"
+        condition: "the value is a file of system/pcsx2/bios; without the option the core scans that folder for a 4 to 8 MiB BIOS"
 
 notes: |
   Hard fork of PCSX2 (pre-Qt, 1.7-dev era) ported to libretro, x86_64 only,
diff --git a/emulators/retroarch.yml b/emulators/retroarch.yml
new file mode 100644
index 000000000..e5feda3ef
--- /dev/null
+++ b/emulators/retroarch.yml
@@ -0,0 +1,58 @@
+emulator: "RetroArch"
+type: utility
+core_classification: other
+source: "https://github.com/libretro/RetroArch"
+upstream: "https://github.com/libretro/RetroArch"
+profiled_date: "2026-11-11"
+source_commit: "69a4f0ea1e8aaf442ae4858f2e7f2b31a1776576"
+core_version: "v1.22.2"
+version_basis:
+  kind: tag
+  tag: "v1.22.2"
+  distance: 0
+display_name: "RetroArch (libretro frontend)"
+cores:
+  - retroarch
+systems: []
+
+pin_build:
+  - platform: amberelec
+    repo: "https://github.com/AmberELEC/AmberELEC"
+    revision: "a21975bfb1a3af68f66e07a931b994b523e1e6e2"
+    path: "packages/games/tools/retroarch/package.mk"
+    variable: PKG_VERSION
+    value: "69a4f0ea1e8aaf442ae4858f2e7f2b31a1776576"
+  - platform: rocknix
+    repo: "https://github.com/ROCKNIX/distribution"
+    revision: "20261101"
+    path: "projects/ROCKNIX/packages/emulators/libretro/retroarch/package.mk"
+    variable: PKG_VERSION
+    value: "bdba046fa6766380bc2457532f38e589df769aaf"
+config_reads:
+  - file: "retroarch.cfg"
+    platforms: [amberelec]
+    source_ref: "retroarch.c:6968-6969, 7148-7155, 7244, configuration.c:3469, 3779, 3824, 3863-3884, 5014-5018, libretro-common/file/config_file.c:840"
+    keys:
+      - key: "system_directory"
+        source_ref: "configuration.c:1645, 4063-4069, 4110-4115, 4346-4347, libretro-common/file/config_file.c:1180-1189, libretro-common/file/file_path.c:1060-1098, runloop.c:1935-1976, config.def.h:925"
+        condition: "systemfiles_in_content_dir false, its default; LIBRETRO_SYSTEM_DIRECTORY in the environment replaces the value, an empty value hands the content's folder"
+  - file: "retroarch.cfg"
+    platforms: [rocknix]
+    source_ref: "retroarch.c:7272-7273, 7452-7459, 7548, configuration.c:3565, 3886, 3931, 3970-4010, 5174-5176, libretro-common/file/config_file.c:817"
+    keys:
+      - key: "system_directory"
+        source_ref: "configuration.c:1688, 4193-4199, 4240-4245, 4494-4495, libretro-common/file/config_file.c:1190-1199, libretro-common/file/file_path.c:1066-1100, runloop.c:1949-1990"
+        condition: "systemfiles_in_content_dir false; LIBRETRO_SYSTEM_DIRECTORY in the environment replaces the value, an empty value hands the content's folder"
+      - key: "systemfiles_in_content_dir"
+        source_ref: "configuration.c:1870, runloop.c:1949-1990"
+        condition: "true hands the content's folder in place of system_directory"
+
+notes: |
+  The libretro frontend. It loads each core and answers
+  RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY with the system_directory of the
+  config it was started with (-c, else the default path), a leading ~
+  expanded to $HOME. The cores read their BIOS files below that folder, so
+  their profiles hold the files and this one holds none.
+  ref: retroarch.c:7148-7155, configuration.c:3824, runloop.c:1935-1976
+
+files: []
diff --git a/emulators/ssf.yml b/emulators/ssf.yml
index 45f70463b..5424a8a0c 100644
--- a/emulators/ssf.yml
+++ b/emulators/ssf.yml
@@ -21,6 +21,17 @@ systems:
   - sega-stv
 mode: standalone
 
+config_reads:
+  - file: "SSF.ini"
+    platforms: [retrobat]
+    binary_sha256: "00f43e448592e5e8359eba7da4de5b3a16e6840ad8faf9cf182f738c4e25293a"
+    revision_from: "SSF PreviewVer R28 (string at 0x1a46634): the 32-bit SSF.exe of RetroBat's stable ssf.7z (2026-04-04), byte-identical to the one in SSF_PreviewVer_R28.zip of release tag PreviewVer"
+    source_ref: "SSF.exe 0x5b0b41-0x5b0b81, SSF.exe 0x5b9785, SSF.exe 0x5ac8cc-0x5ac8e2, SSF.exe 0x5ac94c, SSF.exe 0x5953d0, SSF.exe 0x5954c3-0x5954db, SSF.exe 0xb35e20"
+    keys:
+      - key: "[Peripheral] SaturnBIOS"
+        source_ref: "SSF.exe 0x52bc85-0x52bcd8, SSF.exe 0x5ac9e4, SSF.exe 0x5aab87-0x5aab93, SSF.exe 0x5b2905-0x5b2936, SSF.exe 0xb36022-0xb360cf"
+        condition: "[Program4] NoBIOS off (0 in the embedded template) and Ctrl not held at launch, in Saturn mode (no left Shift, no zip); an empty path or a read short of 0x80000 bytes boots without BIOS"
+
 notes: |
   Sega Saturn and ST-V emulator by Shima, closed source and distributed as a
   binary. Two artifacts are read here and they describe the same emulator: the
diff --git a/emulators/yabasanshiro.yml b/emulators/yabasanshiro.yml
index 3afe0efdc..cfe8bc346 100644
--- a/emulators/yabasanshiro.yml
+++ b/emulators/yabasanshiro.yml
@@ -39,6 +39,19 @@ data_root:
     source_ref: "yabause/src/retro_arena/main.cpp:292-301"
     note: "Created at startup. Holds backup.bin, keymapv2.json, the per-game settings files, save states and screenshots. No firmware is read from it."
 
+config_reads:
+  - file: "yabause.ini"
+    platforms: [retrobat]
+    binary_sha256: "54f89ad3d45f078422616b794e9f7d400a37af0fbb00b31d3ba5a3b66516bf27"
+    revision_from: "yabasanshiro.exe of RetroBat's stable yabasanshiro.7z (2026-08-08), version 1.20.32 (0x141206de8), the yabasanshiro-1.20.32-3989ac release of 2026-07-31 whose source is not public"
+    source_ref: "yabasanshiro.exe 0x14001ae2c-0x14001ae58, yabasanshiro.exe 0x1400cea2c-0x1400cea33, yabasanshiro.exe 0x1400ce4d5-0x1400ce59e, yabasanshiro.exe 0x1400ce5a3-0x1400ce61f, yabasanshiro.exe 0x1400ce44a-0x1400ce496, yabasanshiro.exe 0x1400ce339-0x1400ce394"
+    keys:
+      - key: "[0.9.11] General\\EnableEmulatedBios"
+        source_ref: "yabasanshiro.exe 0x1400d248f-0x1400d2512"
+      - key: "[0.9.11] General\\Bios"
+        source_ref: "yabasanshiro.exe 0x1400d251b-0x1400d258c, yabasanshiro.exe 0x1400cf162-0x1400cf166, yabasanshiro.exe 0x14016d957-0x14016d98f, yabasanshiro.exe 0x14016f3ad-0x14016f4b4, yabasanshiro.exe 0x14016d997-0x14016d9f7"
+        condition: "General\\EnableEmulatedBios false; an empty value runs the HLE BIOS, a file that does not open stops init"
+
 notes: |
   YabaSanshiro is a Sega Saturn emulator by devmiyax, forked from Yabause.
   Requires OpenGL 3.3 or OpenGL ES 3.0.
diff --git a/emulators/ymir.yml b/emulators/ymir.yml
index f1a2dad6a..07784acf8 100644
--- a/emulators/ymir.yml
+++ b/emulators/ymir.yml
@@ -42,6 +42,22 @@ data_root:
     source_ref: "apps/ymir-sdl3/src/app/profile.cpp:29-34, apps/ymir-sdl3/src/app/app.cpp:342-437, apps/ymir-sdl3/CMakeLists.txt:647-648"
     note: "Portable profile: the current directory, then the folder of the executable, when it holds Ymir.toml. The first launch asks between the two. -p names a folder, -u forces this one. Always this folder under Flatpak"
 
+config_reads:
+  - file: "Ymir.toml"
+    platforms: [retrobat]
+    revision: "54fead6a0001d3e4b6741a8d095ee8342266c3dc"
+    revision_from: "version 0.3.3 of ymir-sdl3.exe in RetroBat's stable ymir.7z (2026-08-08), byte-identical to the v0.3.3 windows-x86_64-AVX2 release asset"
+    source_ref: "apps/ymir-sdl3/src/app/settings.hpp:40, apps/ymir-sdl3/src/app/app.cpp:340-359, 412, apps/ymir-sdl3/src/app/profile.cpp:36-62"
+    keys:
+      - key:
+          - "[System.IPL] Override"
+          - "[System.IPL] Path"
+        source_ref: "apps/ymir-sdl3/src/app/settings.cpp:1236-1240, 2805-2813, apps/ymir-sdl3/src/app/services/rom_service.cpp:109-114, apps/ymir-sdl3/src/util/rom_loader.cpp:9-22, apps/ymir-sdl3/src/app/app.cpp:451-462"
+        condition: "Override true and Path not empty: the path is opened without an existence check and must be 512 KiB"
+      - key: "[General.PathOverrides] IPLROMImages"
+        source_ref: "apps/ymir-sdl3/src/app/settings.cpp:1190-1197, apps/ymir-sdl3/src/app/profile.cpp:94-104, apps/ymir-sdl3/src/app/services/rom_service.cpp:67-73, 116-175, apps/ymir-sdl3/src/app/rom_manager.cpp:14-45"
+        condition: "Override false or Path empty: the folder is scanned recursively for 512 KiB files known by XXH128"
+
 notes: |
   Ymir is a Sega Saturn emulator by StrikerX3. The libretro port by
   warmenhoven wraps the shared ymir-core library on the libretro branch of
diff --git a/platforms/_registry.yml b/platforms/_registry.yml
index 6c5babac7..84c599a51 100644
--- a/platforms/_registry.yml
+++ b/platforms/_registry.yml
@@ -585,6 +585,9 @@ platforms:
     extract_to: bios/
     logo: https://raw.githubusercontent.com/RetroBat-Official/retrobat/main/system/resources/retrobat_logo_notext.png
     scraper: retrobat
+    # The scraper rereads the emulatorLauncher commit retrobat.yml pins;
+    # check_freshness and refresh_stale move it to the branch head.
+    rescrape_args: ["--revision", "master"]
     source_url: https://raw.githubusercontent.com/RetroBat-Official/emulatorlauncher/master/batocera-systems/Resources/batocera-systems.json
     source_format: json
     hash_type: md5
diff --git a/platforms/emuelec.yml b/platforms/emuelec.yml
index 3c181e6a4..01167303e 100644
--- a/platforms/emuelec.yml
+++ b/platforms/emuelec.yml
@@ -4295,8 +4295,8 @@ launchers:
     \ PathPAL unset"
   fails_when_missing: false
   installs:
-    path: /emuelec/configs/duckstation/settings.ini
-    source_ref: "packages/sx05re/emulators/duckstation/scripts/duckstation.sh:15"
+    path: /storage/.config/emuelec/configs/duckstation/settings.ini
+    source_ref: "packages/sx05re/emulators/duckstation/package.mk:56, packages/sysutils/systemd/scripts/userconfig-setup:12"
   kept_if_present: true
   overrides: []
   source_ref: "packages/sx05re/emuelec/bin/emuelecRunEmu.sh:207-209, packages/sx05re/emulators/duckstation/config/settings.ini:6-9,\
@@ -4372,7 +4372,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4391,7 +4392,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4409,7 +4411,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4428,7 +4431,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4446,7 +4450,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4465,7 +4470,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4483,7 +4489,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4502,7 +4509,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4520,7 +4528,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4539,7 +4548,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4557,7 +4567,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4576,7 +4587,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4594,7 +4606,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4613,7 +4626,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4631,7 +4645,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4650,7 +4665,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4667,7 +4683,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4684,7 +4701,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4703,7 +4721,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4721,7 +4740,8 @@ launchers:
   depends_on_option: system != arcade
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
@@ -4740,7 +4760,8 @@ launchers:
   fails_when_missing: false
   installs:
     path: /emuelec/configs/advmame/advmame.rc
-    source_ref: "packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
+    source_ref: "packages/sx05re/emulators/advancemame/package.mk:45-49, packages/sysutils/systemd/scripts/userconfig-setup:12,\
+      \ packages/sx05re/emulators/advancemame/bin/advmame.sh:17, 21"
   kept_if_present: false
   overrides:
   - "packages/sx05re/emulators/advancemame/bin/advmame.sh:27"
diff --git a/schemas/emulator.schema.json b/schemas/emulator.schema.json
index 7bb563009..2e11e9d4e 100644
--- a/schemas/emulator.schema.json
+++ b/schemas/emulator.schema.json
@@ -1165,12 +1165,14 @@
         "type": "object",
         "additionalProperties": false,
         "required": ["file", "source_ref", "keys"],
-        "dependentRequired": {"revision": ["platforms", "revision_from"]},
+        "dependentRequired": {"revision": ["platforms", "revision_from"], "binary_sha256": ["platforms", "revision_from"]},
+        "not": {"required": ["revision", "binary_sha256"]},
         "properties": {
           "file": {"type": "string", "minLength": 1, "description": "The config as the code finds it: a name, a glob for any file a flag passes (*.uae), a path, the flag itself, \"command line\" or \"core options\""},
           "platforms": {"type": "array", "items": {"type": "string"}, "minItems": 1, "uniqueItems": true, "description": "Registry slugs of the platforms shipping the build these refs are read at, each with a pin_build entry unless revision names the build"},
           "revision": {"type": "string", "pattern": "^[0-9a-f]{40}$", "description": "The commit these refs are read at, for platforms installing a package no build file of theirs pins (RetroBat's stable archives, a Flathub app)"},
-          "revision_from": {"type": "string", "minLength": 1, "description": "Where revision was read: the version string of the shipped binary, the Flathub manifest commit"},
+          "binary_sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$", "description": "The shipped binary these refs are read in, for a build whose source is not public (SSF, YabaSanshiro 1.20): its refs are virtual addresses of that file"},
+          "revision_from": {"type": "string", "minLength": 1, "description": "Where revision or binary_sha256 was read: the version string of the shipped binary, the Flathub manifest commit, the archive the binary comes from"},
           "source_ref": {"type": "string", "minLength": 1},
           "keys": {
             "type": "array",
diff --git a/scripts/check_freshness.py b/scripts/check_freshness.py
index 4ef9e145c..ae0e27596 100644
--- a/scripts/check_freshness.py
+++ b/scripts/check_freshness.py
@@ -282,7 +282,8 @@ def diff_targets(old: dict, new: dict) -> PlatformDiff:
 
 
 def _scrape_into_copy(
-    module: str, source: Path, workdir: Path, timeout: int = 900
+    module: str, source: Path, workdir: Path, timeout: int = 900,
+    extra: tuple[str, ...] = (),
 ) -> tuple[Path, str | None]:
     """Run a scraper's own write path on a throwaway copy of *source*.
 
@@ -292,7 +293,7 @@ def _scrape_into_copy(
     target = workdir / source.name
     shutil.copyfile(source, target)
     proc = subprocess.run(
-        [sys.executable, "-m", module, "-o", str(target)],
+        [sys.executable, "-m", module, "-o", str(target), *extra],
         cwd=REPO_ROOT,
         capture_output=True,
         text=True,
@@ -327,6 +328,17 @@ def _scrapable_platforms(platforms_dir: Path) -> list[tuple[str, str, Path]]:
     return rows
 
 
+def rescrape_args(platforms_dir: Path, name: str) -> tuple[str, ...]:
+    """What a rescrape passes so the scraper reads upstream's moving head.
+
+    A scraper that rereads the revision its platform file pins by default
+    (RetroBat) names the ref to move to in the registry's rescrape_args.
+    """
+    with (platforms_dir / "_registry.yml").open(encoding="utf-8") as fh:
+        registry = (yaml_load(fh) or {}).get("platforms") or {}
+    return tuple(str(a) for a in (registry.get(name) or {}).get("rescrape_args") or ())
+
+
 def check_platforms(platforms_dir: Path, workdir: Path, jobs: int) -> list[Finding]:
     rows = _scrapable_platforms(platforms_dir)
     findings: list[Finding] = []
@@ -334,7 +346,9 @@ def check_platforms(platforms_dir: Path, workdir: Path, jobs: int) -> list[Findi
     def run(row: tuple[str, str, Path]) -> Finding:
         name, module, path = row
         try:
-            fresh, error = _scrape_into_copy(module, path, workdir)
+            fresh, error = _scrape_into_copy(
+                module, path, workdir, extra=rescrape_args(platforms_dir, name)
+            )
         except subprocess.TimeoutExpired:
             return Finding("platforms", name, ERROR, detail="scraper timed out")
         if error:
diff --git a/scripts/launchers.py b/scripts/launchers.py
index c790af076..3111f4070 100644
--- a/scripts/launchers.py
+++ b/scripts/launchers.py
@@ -369,13 +369,17 @@ def pool_folders(profile: dict) -> dict[str, str]:
 def _reads_apply(read: dict, profile: dict, platform: str) -> bool:
     """Whether a config_reads entry describes the build ``platform`` ships.
 
-    An entry naming platforms is read at their pin_build revision. One that
-    names none is read at the profile's pin, the build of every platform
-    with no pin_build of its own or one pinning the same commit.
+    An entry naming platforms is read at their pin_build revision or its
+    revision. One that names none is read at the profile's pin, the build
+    of every platform no entry names and with no pin_build of its own or
+    one pinning the same commit.
     """
     named = [str(p) for p in read.get("platforms") or []]
     if named:
         return platform in named
+    # A platform an entry names has its build read there, not at the pin.
+    if any(platform in (r.get("platforms") or []) for r in profile.get("config_reads") or []):
+        return False
     pin = str(profile.get("source_commit") or "")
     builds = [b for b in profile.get("pin_build") or [] if b.get("platform") == platform]
     return all(pin and str(b.get("value") or "").startswith(pin[:12]) for b in builds)
@@ -468,7 +472,12 @@ def config_evidence(
     readers: list[str] = []
     uncovered = list(keys)
     loaded = False
-    for key in _named_profiles(record, profiles, platform) or sorted(profiles):
+    named = _named_profiles(record, profiles, platform)
+    if file == CORE_OPTIONS:
+        # A core option is read by the core RetroArch runs, not by the
+        # frontend a record names (RetroDECK's retroarch component).
+        named = [k for k in named if "libretro" in str(profiles[k].get("type") or "")]
+    for key in named or sorted(profiles):
         profile = profiles[key]
         handles = _handle_refs(profile)
         for read in profile.get("config_reads") or []:
@@ -1319,7 +1328,10 @@ class LauncherLayer:
                 for key in self._profiles_named(emulator, profiles, relevant)
             }
             # RetroDECK names its frontend, retroarch, and the core option it
-            # writes, pcsx2_bios, names the core.
+            # writes, pcsx2_bios, names the core: a libretro core option
+            # belongs to a libretro core.
+            if place.build == "libretro" and place.kind == "core_option":
+                owners = {k for k in owners if "libretro" in str(profiles[k].get("type") or "")}
             if not owners:
                 owners = set(setting_readers(place.passes_to, profiles, relevant))
             for key in sorted(owners):
diff --git a/scripts/profile_sync.py b/scripts/profile_sync.py
index 94c663b81..99abe41d4 100644
--- a/scripts/profile_sync.py
+++ b/scripts/profile_sync.py
@@ -1652,7 +1652,10 @@ def _check_build_refs(
     results: list[dict] = []
     for citation, read in deferred:
         for platform in read.get("platforms") or []:
-            revision = str(read.get("revision") or "") or build_revision(profile, str(platform))
+            # A closed build is named by its binary: an address ref is
+            # skipped below, a source path cannot exist at a sha256.
+            revision = (str(read.get("revision") or read.get("binary_sha256") or "")
+                        or build_revision(profile, str(platform)))
             row = {"platform": str(platform), "revision": revision or "",
                    "ref": citation.ref, "field": citation.field}
             if revision is None:
diff --git a/scripts/refresh_stale.py b/scripts/refresh_stale.py
index b50e472d8..c4c4fe37e 100755
--- a/scripts/refresh_stale.py
+++ b/scripts/refresh_stale.py
@@ -380,6 +380,7 @@ def _command_for(
             f"scripts.scraper.{scraper}_scraper",
             "-o",
             f"platforms/{subject}.yml",
+            *(str(a) for a in entry.get("rescrape_args") or ()),
         ]
 
     if area == "targets":
diff --git a/scripts/scraper/base_scraper.py b/scripts/scraper/base_scraper.py
index bbd8dc220..dcda281de 100644
--- a/scripts/scraper/base_scraper.py
+++ b/scripts/scraper/base_scraper.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import inspect
 import json
 import re
 import sys
@@ -391,10 +392,16 @@ def scraper_cli(
     parser.add_argument("--dry-run", action="store_true", help="Show scraped data")
     parser.add_argument("--output", "-o", help="Output YAML file")
     parser.add_argument("--json", action="store_true", help="Output as JSON")
+    takes_revision = "revision" in inspect.signature(scraper_class).parameters
+    if takes_revision:
+        parser.add_argument(
+            "--revision",
+            help="Read this branch head or commit instead of the revision the platform file pins",
+        )
     args = parser.parse_args()
 
     try:
-        scraper = scraper_class()
+        scraper = scraper_class(revision=args.revision) if takes_revision else scraper_class()
         reqs = scraper.fetch_requirements()
     except (OSError, ValueError, RuntimeError) as e:
         _exit_on_scrape_error(e)
diff --git a/scripts/scraper/emuelec_launchers.py b/scripts/scraper/emuelec_launchers.py
index e52a23fc9..98388983e 100644
--- a/scripts/scraper/emuelec_launchers.py
+++ b/scripts/scraper/emuelec_launchers.py
@@ -40,6 +40,10 @@ EMULATORS = f"{SX05RE}/emulators"
 LIBRETRO = f"{SX05RE}/libretro"
 RETROARCH_MK = f"{SX05RE}/libretro_base/retroarch/package.mk"
 BIOS_ROOT = "/storage/roms/bios"
+EMUELEC_MK = f"{SX05RE}/emuelec/package.mk"
+# The copy of every package's /usr/config into /storage/.config at each boot,
+# an existing file kept (cp -i answered by false).
+USERCONFIG = "packages/sysutils/systemd/scripts/userconfig-setup"
 # The roms root that holds it (packages/sx05re/libretro_base/retroarch/package.mk:112,117).
 ROMS_ROOT = "/storage/roms"
 
@@ -106,6 +110,19 @@ class Runs:
         return (RUN_EMU, set(self.of(name).lines))
 
 
+def _storage_path(tree: RepoTree, target: str) -> str:
+    """target with the /emuelec link resolved to the folder it points at.
+
+    The emuelec package links /emuelec to /storage/.config/emuelec, where
+    the first-boot copy of /usr/config lands.
+    """
+    mk = _read(tree, EMUELEC_MK)
+    _line, link = mk.find(r"ln -sf (/storage/\S+) \$\{INSTALL\}(/emuelec)$", "/emuelec link")
+    if target == link.group(2) or target.startswith(link.group(2) + "/"):
+        return link.group(1) + target[len(link.group(2)):]
+    return target
+
+
 def _evidence(
     record: Launcher,
     script: Script,
@@ -113,15 +130,28 @@ def _evidence(
     keys: list[str],
     source_name: str = "",
     rewrites: Iterable[int] = (),
+    tree: RepoTree | None = None,
+    installed: Iterable[tuple[str, Iterable[int]]] = (),
 ) -> Launcher:
-    """A config record with the start script lines that put its file in place.
+    """A config record with the lines that put its file in place: the
+    first-boot copy of /usr/config when ``tree`` is given, then the start
+    script's own. ``installed`` are the package.mk lines putting the file
+    in /usr/config.
 
     ``rewrites`` are lines the extractor read as rewriting the record's
     values without naming their keys (advmame.sh's sed of /roms/mame).
     """
-    placement = config_placement(script, target, keys, source_name=source_name)
+    placements = []
+    if tree is not None:
+        setup = _read(tree, USERCONFIG)
+        placements.append(config_placement(
+            setup, _storage_path(tree, target), required=False, sources=("/usr/config/",)
+        ))
+    placement = config_placement(script, target, keys, source_name=source_name,
+                                 required=not placements or not placements[0].install)
     placement.overrides |= set(rewrites)
-    fields = evidence_fields([placement])
+    placements.append(placement)
+    fields = evidence_fields(placements, installed)
     record.installs = fields["installs"]
     record.kept_if_present = fields["kept_if_present"]
     record.overrides = fields["overrides"]
@@ -356,6 +386,8 @@ def duckstation(tree: RepoTree, runs: Runs) -> list[Launcher]:
         script,
         script.expand("${CONFIG_DIR}/settings.ini", run_line, set()),
         [f"[{s}] {k}" for s, k in (folder_key, *file_keys)],
+        tree=tree,
+        installed=[(mk.path, {mk_line})],
     )]
 
 
@@ -569,7 +601,8 @@ def advancemame(tree: RepoTree, runs: Runs) -> list[Launcher]:
     target = script.expand("${CONFIG_DIR}/advmame.rc", run_line, set())
 
     def proved(record: Launcher, key: str) -> Launcher:
-        return _evidence(record, script, target, [key], rewrites={sed_line})
+        return _evidence(record, script, target, [key], rewrites={sed_line}, tree=tree,
+                         installed=[(mk.path, {mk_line for _, _, mk_line in configs})])
 
     records = []
     for key, folder in value:
diff --git a/scripts/scraper/retrobat_launchers.py b/scripts/scraper/retrobat_launchers.py
index a49709194..a443f83c3 100644
--- a/scripts/scraper/retrobat_launchers.py
+++ b/scripts/scraper/retrobat_launchers.py
@@ -1868,13 +1868,27 @@ def _root_writes(src: Source, emulator: str) -> list[Record]:
         if root_reach is None:
             continue
         method = root_reach[0]
+        # A folder below the root, `string x = Path.Combine(root, "cdb")`
+        # that the method creates or tests as a directory. A file below it
+        # is a guarded write's, read by _guarded_write.
+        folders = {root.group(1): ("bios", root)}
+        for sub in re.compile(
+            rf"string (\w+) = Path\.Combine\({root.group(1)}, ((?:{STRING}, )*{STRING})\);"
+        ).finditer(src.text, root.end(), method[1]):
+            if re.search(
+                rf"\b(?:\w*CreateDirectory|Directory\.Exists)\({sub.group(1)}\)",
+                src.text[sub.end() : method[1]],
+            ):
+                folders[sub.group(1)] = ("/".join(["bios", *_strings(sub.group(2))]), sub)
+        names = "|".join(map(re.escape, folders))
         for write in re.compile(
-            rf'(\w+)\.WriteValue\("([^"]*)", "([^"]+)", (?:"\'" \+ )?{root.group(1)}(?: \+ "\'")?\);'
+            rf'(\w+)\.WriteValue\("([^"]*)", "([^"]+)", (?:"\'" \+ )?({names})(?: \+ "\'")?\);'
         ).finditer(src.text, root.end(), method[1]):
             reached = _conditions(src, write.start())
             if reached is None:
                 continue
-            writer, section, key = write.groups()
+            writer, section, key, held = write.groups()
+            folder, declared = folders[held]
             target = f"[{section}] {key}" if section else key
             records.append(
                 _record(
@@ -1888,12 +1902,14 @@ def _root_writes(src: Source, emulator: str) -> list[Record]:
                             [
                                 *reached[2],
                                 src.lines(root.start(), root.end()),
+                                *([src.lines(declared.start(), declared.end())]
+                                  if declared is not root else []),
                                 src.lines(write.start(), write.end()),
                             ],
                         )
                     ),
-                    search_dir="bios",
-                    passes_to=f"{_config_name(src, method, writer)} {target} = bios",
+                    search_dir=folder,
+                    passes_to=f"{_config_name(src, method, writer)} {target} = {folder}",
                     fails_when_missing=False,
                     depends_on_option=", ".join(reached[1]) or None,
                 )
@@ -2376,11 +2392,7 @@ def _option_path_in(src: Source, features: Source, emulator: str) -> list[Record
     gate = src.find(
         rf'if \(SystemConfig\.isOptSet\("{option}"\)', f"{option} gate", method[0], override.start()
     )
-    gate_block = src.block_at(gate.end())
-    if not gate_block[0] < override.start() < gate_block[1]:
-        raise LauncherPatternMissing(
-            src.path, f"{option} block around line {src.line(override.start())}"
-        )
+    gate_block = _gate_span(src, gate, override)
     write = re.compile(
         rf'(\w+)\.WriteValue\("([^"]*)", "([^"]+)", ([^;\n]*\b{var}\b[^;\n]*)\);'
     ).search(code, override.end(), method[1])
@@ -2390,6 +2402,8 @@ def _option_path_in(src: Source, features: Source, emulator: str) -> list[Record
     guarded = re.compile(rf"if \(File\.Exists\({var}\)[^\n]*\)\s*$").search(
         code, method[0], write.start()
     )
+    flag = None if guarded else _flag_guard(code, var, method[0], write.start())
+    guarded = guarded or flag
     skipped = re.findall(
         rf'SystemConfig\["{option}"\] != "(\w+)"', code[gate.start() : write.end()]
     )
@@ -2397,8 +2411,13 @@ def _option_path_in(src: Source, features: Source, emulator: str) -> list[Record
     target = f"{config} [{section}] {key}" if section else f"{config} {key}"
     suffix = ", only if the file exists" if guarded else ", written without an existence check"
     fails = f"{key} not written" if guarded else "path written without an existence check"
-    write_span = src.lines(_statement_start(src, write.start()), write.end())
+    write_span = src.lines(
+        flag.start() if flag else _statement_start(src, write.start()), write.end()
+    )
     choices, choice_lines = feature_choices(features, emulator, option)
+    fallback = _fallback_names(src, var, gate_block[1], write.start())
+    if fallback is not None:
+        fails = f"{', then '.join(fallback[0])}, instead, else {fails}"
     records = []
     default = list(
         re.compile(rf'string {var} = Path\.Combine\({_BIOS_ROOT}, "([^"]+)"\);').finditer(
@@ -2437,9 +2456,71 @@ def _option_path_in(src: Source, features: Source, emulator: str) -> list[Record
             depends_on_option=option,
         )
     )
+    if fallback is not None:
+        names, span = fallback
+        unset = f"{default[-1].group(1)} absent with {option} unset" if default else None
+        chosen = f"the {option} file absent" + (
+            f", {option} not {' or '.join(skipped)}" if skipped else ""
+        )
+        records.append(
+            _record(
+                emulator,
+                "standalone",
+                "names_searched",
+                names,
+                _path_parts(src, span, write_span),
+                case_insensitive=True,
+                search_dir="bios",
+                passes_to=f"{target} = <first found>{suffix}",
+                fails_when_missing=f"{key} not written" if guarded else fails,
+                depends_on_option=" or ".join(c for c in (unset, chosen) if c),
+            )
+        )
     return records + _root_writes(src, emulator)
 
 
+def _gate_span(src: Source, gate: re.Match[str], override: re.Match[str]) -> tuple[int, int]:
+    """The span an option gate governs: its block, or the one statement a
+    braceless if runs, which must be the override."""
+    paren = gate.start() + len("if ")
+    after = paren + len(_call_args(src, paren)) + 2
+    if re.match(r"\s*\{", src.text[after:]):
+        block = src.block_at(after)
+    else:
+        block = (after, _statement_end(src, after))
+    if not block[0] < override.start() < block[1]:
+        raise LauncherPatternMissing(
+            src.path, f"option block around line {src.line(override.start())}"
+        )
+    return block
+
+
+def _flag_guard(code: str, var: str, start: int, end: int) -> re.Match[str] | None:
+    """A write under `if (flag)` where flag holds File.Exists of the path."""
+    flag = re.compile(rf"bool (\w+) = [^;\n]*\bFile\.Exists\({var}\)[^;\n]*;").search(
+        code, start, end
+    )
+    if flag is None or not re.compile(rf"if \({flag.group(1)}\)\s*$", re.M).search(
+        code, flag.end(), end
+    ):
+        return None
+    return flag
+
+
+def _fallback_names(
+    src: Source, var: str, start: int, end: int
+) -> tuple[list[str], tuple[int, int]] | None:
+    """Names tried in bios, first existing one kept, when the chosen file is absent."""
+    found = re.compile(
+        rf"if \(([^\n]*!File\.Exists\({var}\)[^\n]*)\)\s*"
+        rf"{var} = new\[\] \{{ (?P<names>(?:{STRING}(?:, )?)+) \}}\.Select\((?P<arg>\w+) => "
+        rf"Path\.Combine\({_BIOS_ROOT}, (?P=arg)\)\)\.FirstOrDefault\(File\.Exists\) \?\? {var};"
+    ).search(_code(src), start, end)
+    if found is None:
+        return None
+    return _strings(found.group("names")), src.lines(found.start(), found.end())
+
+
 OPTION_PATHS = {
     f"{GENERATORS}/Kronos.Generator.cs": "kronos",
     f"{GENERATORS}/SSF.Generator.cs": "ssf",
diff --git a/scripts/scraper/retrobat_scraper.py b/scripts/scraper/retrobat_scraper.py
index 7ae5a605a..f5e7cc78d 100644
--- a/scripts/scraper/retrobat_scraper.py
+++ b/scripts/scraper/retrobat_scraper.py
@@ -12,6 +12,7 @@ import json
 import re
 import urllib.error
 import urllib.request
+from pathlib import Path
 
 try:
     from .base_scraper import (
@@ -39,6 +40,7 @@ except ImportError:
     from retrobat_launchers import extract_launchers
 
 PLATFORM_NAME = "retrobat"
+PLATFORM_FILE = Path(__file__).resolve().parents[2] / "platforms" / "retrobat.yml"
 
 LAUNCHER_REPO = "RetroBat-Official/emulatorlauncher"
 SOURCE_URL = (
@@ -132,6 +134,28 @@ def launcher_revision(url: str) -> str:
     return found.group(1)
 
 
+def pinned_revision(platform_file: Path = PLATFORM_FILE) -> str:
+    """The emulatorLauncher commit platforms/retrobat.yml was read from.
+
+    A rescrape reads this commit unless told to move, so a change to an
+    extractor shows in the diff alone, without upstream's commits since.
+    """
+    from common import yaml_load
+
+    with platform_file.open(encoding="utf-8") as fh:
+        source = str((yaml_load(fh) or {}).get("source") or "")
+    return launcher_revision(source)
+
+
+def resolve_revision(revision: str | None) -> str:
+    """The commit to read: the pin when None, a branch's head, or a sha."""
+    if revision is None:
+        return pinned_revision()
+    if re.fullmatch(r"[0-9a-f]{40}", revision):
+        return revision
+    return fetch_branch_head(LAUNCHER_REPO, revision)
+
+
 def fetch_launchers(rev: str) -> list[dict]:
     """Launcher records read from the generators at the commit the BIOS list comes from."""
     texts = {
@@ -160,10 +184,14 @@ SYSTEM_SLUG_MAP = {
 class Scraper(BaseScraper):
     """Scraper for RetroBat batocera-systems.json."""
 
-    def __init__(self, url: str | None = None) -> None:
-        # batocera-systems.json is read from master: the commit read is recorded.
+    def __init__(self, url: str | None = None, revision: str | None = None) -> None:
+        # The BIOS list and the generators are read at one commit, the one
+        # platforms/retrobat.yml pins unless a revision moves it (--revision
+        # master reads the branch head). The commit read is recorded.
         if url is None:
-            url = SOURCE_URL.format(rev=fetch_branch_head(LAUNCHER_REPO, "master"))
+            url = SOURCE_URL.format(rev=resolve_revision(revision))
+        elif revision is not None:
+            raise ValueError("pass a url or a revision, not both")
         super().__init__(url=url)
         self._parsed: dict | None = None
 
diff --git a/scripts/scraper/shell_launchers.py b/scripts/scraper/shell_launchers.py
index d847b2666..e71936986 100644
--- a/scripts/scraper/shell_launchers.py
+++ b/scripts/scraper/shell_launchers.py
@@ -483,6 +483,15 @@ def _guarded(script: Script, number: int, target: str) -> bool:
     return False
 
 
+def _quoted_glob(command: str) -> bool:
+    """Whether the source of a copy holds a "*" only inside quotes."""
+    found = [w for w in words(command)[1:] if not w.raw.startswith("-")]
+    if len(found) < 2:
+        return False
+    raw = found[0].raw
+    return "*" in raw and "*" not in re.sub(r'"[^"]*"|\'[^\']*\'', "", raw)
+
+
 def config_placement(
     script: Script,
     target: str,
@@ -511,12 +520,16 @@ def config_placement(
                 args = []
                 for word in words(line[copy.start(1):])[1:]:
                     # The command ends at a separator or a redirection.
-                    if word.raw in {";", "&&", "||", "|"} or re.match(r"\d*>", word.raw):
+                    if word.raw in {";", "&&", "||", "|"} or re.match(r"\d*>|&>", word.raw):
                         break
                     args.append(word.text)
                 operands = [a for a in args if not a.startswith("-")]
                 if not operands:
                     continue
+                # A quoted "*" is a file named *, which no package installs:
+                # the copy does nothing (EmuELEC's duckstation.sh).
+                if _quoted_glob(line[copy.start(1):]):
+                    continue
                 destination = script.expand(operands[-1], number, set()).rstrip("/")
                 source = script.expand(operands[0], number, set()).rstrip("/")
                 hits = target == destination or target.startswith(destination + "/") or (
@@ -536,7 +549,11 @@ def config_placement(
                     continue
                 if sources and not source.startswith(sources):
                     continue
-                skip = "-n" in args or "--ignore-existing" in args
+                # cp -i fed by false answers no to every overwrite.
+                prompted = any(
+                    a.startswith("-") and not a.startswith("--") and "i" in a[1:] for a in args
+                ) and re.search(r"\bfalse\s*\|\s*$", line[:copy.start(1)])
+                skip = "-n" in args or "--ignore-existing" in args or bool(prompted)
             else:
                 skip = False
             install.add(number)
diff --git a/scripts/validate_schemas.py b/scripts/validate_schemas.py
index dc84746b6..055495866 100644
--- a/scripts/validate_schemas.py
+++ b/scripts/validate_schemas.py
@@ -147,7 +147,7 @@ def _config_reads_without_build(path: Path, document: object) -> list[str]:
     for index, read in enumerate(document.get("config_reads") or []):
         if not isinstance(read, dict):
             continue
-        if read.get("revision"):
+        if read.get("revision") or read.get("binary_sha256"):
             continue
         for platform in read.get("platforms") or []:
             if str(platform) not in builds:
diff --git a/tests/test_launcher_evidence.py b/tests/test_launcher_evidence.py
index 5f01c2929..18dbe8074 100644
--- a/tests/test_launcher_evidence.py
+++ b/tests/test_launcher_evidence.py
@@ -261,6 +261,53 @@ class Invariants(unittest.TestCase):
         ), [])
         pinned = [{**reads[0], "revision": "c" * 40, "revision_from": "the exe"}]
         self.assertEqual(_config_reads_without_build(path, {"config_reads": pinned}), [])
+        closed = [{**reads[0], "binary_sha256": "d" * 64, "revision_from": "the archive"}]
+        self.assertEqual(_config_reads_without_build(path, {"config_reads": closed}), [])
+
+
+class ShippedBuild(unittest.TestCase):
+    def test_a_platform_an_entry_names_is_read_there_only(self) -> None:
+        """RetroDECK ships GZDoom 4.14.2: the entry read at the pin does not
+        also stand for it, so a key only the pin reads proves nothing there."""
+        duck = profile(config_reads=[
+            {"file": "settings.ini", "source_ref": "src/core.cpp:10",
+             "keys": [{"key": "[BIOS] SearchDirectory", "source_ref": "src/settings.cpp:20"},
+                      {"key": ["[BIOS] PathPAL", "[BIOS] PathNTSCU"], "source_ref": "src/bios.cpp:30"}]},
+            {"file": "settings.ini", "platforms": ["rocknix"], "revision": "a" * 40,
+             "revision_from": "the AppImage", "source_ref": "src/core.cpp:12",
+             "keys": [{"key": "[BIOS] SearchDirectory", "source_ref": "src/settings.cpp:22"}]},
+        ])
+        evidence = config_evidence(record(), {"duck": duck}, "rocknix")
+        self.assertEqual(evidence.missing, ("config_reads: no read of [BIOS] PathPAL",))
+        self.assertTrue(config_evidence(record(), {"duck": duck}, "emuelec").proven)
+
+
+class CoreOptions(unittest.TestCase):
+    def test_a_core_option_is_read_by_the_core_not_the_frontend(self) -> None:
+        """RetroDECK's retroarch component writes pcsx2_bios: the frontend
+        names the record, the core RetroArch runs reads the option."""
+        profiles = {
+            "retroarch": {"emulator": "RetroArch", "type": "utility", "cores": ["retroarch"],
+                          "config_reads": [{"file": "retroarch.cfg", "source_ref": "a.c:1",
+                                            "keys": [{"key": "system_directory",
+                                                      "source_ref": "a.c:2"}]}]},
+            "lrps2": {"emulator": "LRPS2", "type": "libretro", "cores": ["lrps2"],
+                      "config_reads": [{"file": "core options", "source_ref": "main.cpp:1",
+                                        "keys": [{"key": "pcsx2_bios",
+                                                  "source_ref": "main.cpp:2"}]}]},
+        }
+        option = {
+            "emulator": "retroarch", "build": "libretro", "kind": "core_option",
+            "names": ["scph10000.bin"], "passes_to": "core option pcsx2_bios",
+            "installs": {"path": "$core_options", "source_ref": "prepare.sh:24"},
+            "overrides": [], "source_ref": "rd_config/retroarch-core-options.cfg:515",
+        }
+        evidence = config_evidence(option, profiles, "retrodeck")
+        self.assertTrue(evidence.proven, evidence.missing)
+        self.assertEqual(evidence.readers, ("lrps2",))
+        system = {**option, "kind": "passes_path", "passes_to": "retroarch.cfg system_directory",
+                  "source_ref": "rd_config/retroarch.cfg:44"}
+        self.assertEqual(config_evidence(system, profiles, "retrodeck").readers, ("retroarch",))
 
 
 class BuildRefs(unittest.TestCase):
@@ -299,6 +346,37 @@ class BuildRefs(unittest.TestCase):
         self.assertNotIn(("b" * 40, "ROCKNIX x.patch"), asked)
 
 
+    def test_a_closed_build_is_read_in_its_binary(self) -> None:
+        """An address ref is read in the binary binary_sha256 names, never
+        fetched; a source path cannot exist at a closed build."""
+        read = {
+            "file": "SSF.ini", "platforms": ["retrobat"], "binary_sha256": "e" * 64,
+            "revision_from": "the archive", "source_ref": "SSF.exe 0x10-0x20", "keys": [],
+        }
+
+        class View:
+            repo, field = "repo", "source"
+
+        class Citation:
+            def __init__(self, ref: str) -> None:
+                self.ref, self.field = ref, "c"
+
+        asked: list[str] = []
+
+        def fetch(_repo: str, _revision: str, path: str) -> list[str] | None:
+            asked.append(path)
+            return None
+
+        rows = _check_build_refs(
+            {"config_reads": [read]},
+            [(Citation("SSF.exe 0x10-0x20"), read), (Citation("src/a.c:3"), read)],
+            [View()], fetch,
+        )
+        self.assertEqual([r["status"] for r in rows], ["BUILD_OK", "BUILD_GONE"])
+        self.assertEqual({r["revision"] for r in rows}, {"e" * 64})
+        self.assertEqual(asked, ["src/a.c"])
+
+
 class RepositoryRecords(unittest.TestCase):
     """The placement chains the audit of 2026-11-10 found moving files."""
 
diff --git a/tests/test_launchers_emuelec.py b/tests/test_launchers_emuelec.py
index 630547701..8ab6fa3fe 100644
--- a/tests/test_launchers_emuelec.py
+++ b/tests/test_launchers_emuelec.py
@@ -229,11 +229,25 @@ DUCKSTATION_SH = text(
     CONFIG_DIR="/emuelec/configs/duckstation"
         duckstation-nogui -fullscreen -settings "${CONFIG_DIR}/settings.ini" -- "${1}"
     if [ ! -d "${CONFIG_DIR}" ]; then
-        cp -rf /usr/config/emuelec/configs/duckstation/* "${CONFIG_DIR}"
+        cp -rf "/usr/config/emuelec/configs/duckstation/*" "${CONFIG_DIR}"
     fi
 """
 )
 
+# packages/sysutils/systemd/scripts/userconfig-setup:11-12 at v4.8.
+USERCONFIG = text(
+    """
+    # Copy config files, but don't overwrite - this should replace our sample files
+    false | cp -iRp /usr/config/* /storage/.config/ &>/dev/null
+"""
+)
+
+EMUELEC_MK = text(
+    """
+      ln -sf /storage/.config/emuelec ${INSTALL}/emuelec
+"""
+)
+
 
 def yabasanshiro_sh(program: str) -> str:
     return text(
@@ -400,6 +414,8 @@ FILES = {
     f"{EMU}/duckstation/config/settings.ini": DUCKSTATION_INI,
     f"{EMU}/duckstation/package.mk": DUCKSTATION_MK,
     f"{EMU}/duckstation/scripts/duckstation.sh": DUCKSTATION_SH,
+    el.USERCONFIG: USERCONFIG,
+    el.EMUELEC_MK: EMUELEC_MK,
     el.YABASANSHIRO_SCRIPTS[0]: yabasanshiro_sh("yabasanshiro"),
     el.YABASANSHIRO_SCRIPTS[1]: yabasanshiro_sh("yabasanshiro1_5"),
     f"{EMU}/jzintv/scripts/jzintv.sh": JZINTV_SH,
@@ -540,12 +556,37 @@ class StandaloneRecords(unittest.TestCase):
         (record,) = records(el.duckstation)
         self.assertEqual((record["kind"], record["search_dir"]), ("scans_dir", "/storage/roms/bios"))
 
-    def test_duckstation_config_is_kept_when_present(self):
+    def test_duckstation_config_comes_from_the_boot_copy(self):
+        """duckstation.sh quotes its glob: its copy names a file called *, so
+        the settings.ini in place is the one userconfig-setup copies from
+        /usr/config, an existing file kept (false | cp -i)."""
         (record,) = records(el.duckstation)
-        self.assertEqual(record["installs"]["path"], "/emuelec/configs/duckstation/settings.ini")
+        self.assertEqual(
+            record["installs"],
+            {"path": "/storage/.config/emuelec/configs/duckstation/settings.ini",
+             "source_ref": f"{EMU}/duckstation/package.mk:1, {el.USERCONFIG}:2"},
+        )
         self.assertIs(record["kept_if_present"], True)
         self.assertEqual(record["overrides"], [])
 
+    def test_an_unquoted_glob_in_the_start_script_installs_too(self):
+        unquoted = DUCKSTATION_SH.replace(
+            '"/usr/config/emuelec/configs/duckstation/*"', "/usr/config/emuelec/configs/duckstation/*"
+        )
+        (record,) = records(el.duckstation, **{f"{EMU}/duckstation/scripts/duckstation.sh": unquoted})
+        self.assertEqual(record["installs"]["path"], "/emuelec/configs/duckstation/settings.ini")
+        self.assertIs(record["kept_if_present"], True)
+
+    def test_without_a_boot_copy_the_quoted_glob_installs_nothing(self):
+        with self.assertRaises(LauncherPatternMissing):
+            records(el.duckstation, **{el.USERCONFIG: "#!/bin/sh\n"})
+
+    def test_an_overwriting_boot_copy_does_not_keep_the_file(self):
+        (record,) = records(el.duckstation, **{
+            el.USERCONFIG: "cp -Rp /usr/config/* /storage/.config/ &>/dev/null\n",
+        })
+        self.assertIs(record["kept_if_present"], False)
+
     def test_duckstation_with_a_fixed_bios_path_raises(self):
         changed = DUCKSTATION_INI.replace("PathPAL =", "PathPAL = /storage/roms/bios/scph5502.bin")
         with self.assertRaises(LauncherPatternMissing):
diff --git a/tests/test_launchers_retrobat.py b/tests/test_launchers_retrobat.py
index b2d8ded7a..58dd8430e 100644
--- a/tests/test_launchers_retrobat.py
+++ b/tests/test_launchers_retrobat.py
@@ -11,6 +11,7 @@ from __future__ import annotations
 import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
 
 import sys
+import tempfile
 import textwrap
 import unittest
 from pathlib import Path
@@ -637,6 +638,57 @@ YMIR = """
     }
 """
 
+# emulatorLauncher f681f435: the default falls back to the regional BIOS.
+KRONOS_FALLBACK = """
+    private void SetupConfig(string path)
+    {
+        string iniFile = Path.Combine(path, "kronos.ini");
+        using (var ini = new IniFile(iniFile, IniOptions.KeepEmptyValues))
+        {
+            bool hleBios = false;
+            string bios = Path.Combine(AppConfig.GetFullPath("bios"), "saturn_bios.bin");
+            if (SystemConfig.isOptSet("kronos_force_bios") && !string.IsNullOrEmpty(SystemConfig["kronos_force_bios"]))
+            {
+                if (SystemConfig["kronos_force_bios"] != "hle")
+                    bios = Path.Combine(AppConfig.GetFullPath("bios"), SystemConfig["kronos_force_bios"]);
+                else
+                    hleBios = true;
+            }
+            if (!hleBios && !File.Exists(bios))
+                bios = new[] { "sega_101.bin", "mpr-17933.bin" }.Select(f => Path.Combine(AppConfig.GetFullPath("bios"), f)).FirstOrDefault(File.Exists) ?? bios;
+
+            if (File.Exists(bios))
+                ini.WriteValue("1.0", "General\\\\Bios", bios.Replace("\\\\", "/"));
+        }
+    }
+"""
+
+# emulatorLauncher f681f435: a forced BIOS only, written under a flag, and
+# a folder below bios for the CD block ROM.
+YMIR_OVERRIDE = """
+    private void SetupConfiguration(string path)
+    {
+        string iniFile = Path.Combine(path, "Ymir.toml");
+        using (var ini = new IniFile(iniFile))
+        {
+            string saturnBiosPath = null;
+            if (SystemConfig.isOptSet("ymir_force_bios") && !string.IsNullOrEmpty(SystemConfig["ymir_force_bios"]))
+                saturnBiosPath = Path.Combine(AppConfig.GetFullPath("bios"), SystemConfig["ymir_force_bios"]);
+
+            bool overrideIpl = saturnBiosPath != null && File.Exists(saturnBiosPath);
+            ini.WriteValue("System.IPL", "Override", overrideIpl ? "true" : "false");
+            if (overrideIpl)
+                ini.WriteValue("System.IPL", "Path", "'" + saturnBiosPath + "'");
+
+            string iplPath = AppConfig.GetFullPath("bios");
+            ini.WriteValue("General.PathOverrides", "IPLROMImages", "'" + iplPath + "'");
+            string cdbPath = Path.Combine(iplPath, "cdb");
+            FileTools.TryCreateDirectory(cdbPath);
+            ini.WriteValue("General.PathOverrides", "CDBlockROMImages", "'" + cdbPath + "'");
+        }
+    }
+"""
+
 SSF = """
     private void SetupConfiguration(string path)
     {
@@ -1043,6 +1095,46 @@ class OptionReplacesThePath(unittest.TestCase):
             folder["passes_to"], "Ymir.toml [General.PathOverrides] IPLROMImages = bios"
         )
 
+    def test_kronos_falls_back_to_the_regional_bios(self):
+        path = f"{G}/Kronos.Generator.cs"
+        sources = _feature_sources(path, KRONOS_FALLBACK, SATURN_FEATURES)
+        fixed, option, fallback = rl._option_path_in(
+            sources[path], sources[rl.FEATURES], "kronos"
+        )
+        self.assertEqual(
+            fixed["fails_when_missing"],
+            "sega_101.bin, then mpr-17933.bin, instead, else General\\Bios not written",
+        )
+        self.assertEqual(option["fails_when_missing"], fixed["fails_when_missing"])
+        self.assertEqual(fallback["kind"], "names_searched")
+        self.assertEqual(fallback["names"], ["sega_101.bin", "mpr-17933.bin"])
+        self.assertEqual(
+            fallback["passes_to"],
+            "kronos.ini [1.0] General\\Bios = <first found>, only if the file exists",
+        )
+        self.assertEqual(
+            fallback["depends_on_option"],
+            "saturn_bios.bin absent with kronos_force_bios unset"
+            " or the kronos_force_bios file absent, kronos_force_bios not hle",
+        )
+        self.assertEqual(fallback["source_ref"], f"{path}:15-19")
+
+    def test_ymir_writes_a_forced_bios_under_its_flag(self):
+        path = f"{G}/Ymir.Generator.cs"
+        sources = _feature_sources(path, YMIR_OVERRIDE, SATURN_FEATURES)
+        option, ipl, cdb = rl._option_path_in(sources[path], sources[rl.FEATURES], "ymir")
+        self.assertEqual(
+            option["passes_to"],
+            "Ymir.toml [System.IPL] Path = <bios>/<value>, only if the file exists",
+        )
+        self.assertEqual(option["source_ref"], f"{path}:7-13, {rl.FEATURES}:10-13")
+        self.assertEqual(ipl["passes_to"], "Ymir.toml [General.PathOverrides] IPLROMImages = bios")
+        self.assertEqual(cdb["search_dir"], "bios/cdb")
+        self.assertEqual(
+            cdb["passes_to"], "Ymir.toml [General.PathOverrides] CDBlockROMImages = bios/cdb"
+        )
+        self.assertEqual(cdb["source_ref"], f"{path}:15-19")
+
     def test_ssf_has_no_default_name(self):
         path = f"{G}/SSF.Generator.cs"
         sources = _feature_sources(path, SSF, SATURN_FEATURES)
@@ -1488,6 +1580,21 @@ class Helpers(unittest.TestCase):
         src = rl.Source("x.cs", 'void f()\n{\n    s = "}";\n}\n')
         self.assertEqual(src.lines(*src.block_at(0)), (2, 4))
 
+    def test_a_rescrape_reads_the_pinned_commit(self):
+        from scraper import retrobat_scraper as rs  # noqa: PLC0415
+
+        pin = "ca486005f598551600d04a33b3156a5d764368d6"
+        with tempfile.TemporaryDirectory(dir=REPO_ROOT / "tmp") as scratch:
+            yml = Path(scratch) / "retrobat.yml"
+            yml.write_text(
+                "source: https://raw.githubusercontent.com/RetroBat-Official/emulatorlauncher/"
+                f"{pin}/batocera-systems/Resources/batocera-systems.json\n",
+                encoding="utf-8",
+            )
+            self.assertEqual(rs.pinned_revision(yml), pin)
+        self.assertEqual(rs.resolve_revision(pin), pin)
+        self.assertEqual(rs.resolve_revision(None), rs.pinned_revision())
+
     def test_revision_comes_from_the_pinned_url(self):
         url = (
             "https://raw.githubusercontent.com/RetroBat-Official/emulatorlauncher/"
diff --git a/tests/test_refresh_stale.py b/tests/test_refresh_stale.py
index b262fcc9e..8ab9ca66e 100644
--- a/tests/test_refresh_stale.py
+++ b/tests/test_refresh_stale.py
@@ -17,6 +17,8 @@ import unittest
 from pathlib import Path
 from unittest import mock
 
+import yaml
+
 REPO_ROOT = Path(__file__).resolve().parents[1]
 sys.path.insert(0, str(REPO_ROOT / "scripts"))
 
@@ -55,6 +57,15 @@ class Planning(unittest.TestCase):
              ["scripts/verify.py", "--platform", "retrobat"]],
         )
 
+    def test_a_scraper_reading_its_pin_is_moved_by_rescrape_args(self):
+        registry = dict(REGISTRY, retrobat={"scraper": "retrobat",
+                                            "rescrape_args": ["--revision", "master"]})
+        jobs, _, _ = rs.plan_jobs([finding("platforms", "retrobat")], registry, {})
+        self.assertEqual(jobs[0].command[-2:], ["--revision", "master"])
+        with (REPO_ROOT / "platforms" / "_registry.yml").open(encoding="utf-8") as fh:
+            real = yaml.safe_load(fh)["platforms"]["retrobat"]
+        self.assertEqual(real["rescrape_args"], ["--revision", "master"])
+
     def test_a_child_waits_for_its_rescraped_parent(self):
         """retropie inherits retroarch: run beside the parent's rescrape, its
         truth read the old parent and its export was refused as stale."""
diff --git a/tests/test_scraper_contract.py b/tests/test_scraper_contract.py
index aab7692ca..7b588ede3 100644
--- a/tests/test_scraper_contract.py
+++ b/tests/test_scraper_contract.py
@@ -650,6 +650,15 @@ class UnreadableReleaseStopsTheScrape(unittest.TestCase):
     # Read at a release tag: the pin is the tag, not a branch commit.
     TAG_PINNED = {"amberelec", "batocera", "bizhawk", "emuelec", "knulli", "recalbox",
                   "rocknix", "romm"}
+    # Reread the commit the platform file pins, moved by the revision the
+    # registry's rescrape_args names: checked with that revision.
+    FILE_PINNED = {"retrobat"}
+
+    @classmethod
+    def _construct(cls, module: object, scraper: str) -> object:
+        if scraper in cls.FILE_PINNED:
+            return module.Scraper(revision="master")
+        return module.Scraper()
 
     @staticmethod
     def _registry_scrapers() -> list[str]:
@@ -671,7 +680,17 @@ class UnreadableReleaseStopsTheScrape(unittest.TestCase):
             with self.subTest(scraper=name), mock.patch(
                 "urllib.request.urlopen", self._refuse
             ), self.assertRaises(RuntimeError):
-                module.Scraper()
+                self._construct(module, scraper)
+
+    def test_a_file_pinned_scraper_reads_its_pin_offline(self):
+        for scraper in sorted(self.FILE_PINNED):
+            module = importlib.import_module(f"scraper.{scraper}_scraper")
+            with self.subTest(scraper=scraper), mock.patch(
+                "urllib.request.urlopen", self._refuse
+            ):
+                self.assertEqual(
+                    module.launcher_revision(module.Scraper().url), module.pinned_revision()
+                )
 
     def test_a_branch_read_records_its_commit(self):
         """System.dat, batocera-systems.json, checkBIOS.sh, the BiosDB and the
@@ -695,7 +714,7 @@ class UnreadableReleaseStopsTheScrape(unittest.TestCase):
             name = f"scraper.{scraper}_scraper"
             module = importlib.import_module(name)
             with self.subTest(scraper=name), mock.patch("urllib.request.urlopen", answer):
-                instance = module.Scraper()
+                instance = self._construct(module, scraper)
                 # RetroDECK reads a tree of manifests and keeps the commit apart.
                 recorded = getattr(instance, "revision", "") or instance.url
                 self.assertRegex(recorded, f"(^|/){sha}(/|$)")