diff --git a/packaging/muos/MUOS/info/catalogue/External - Ports/box/mice.png b/packaging/muos/MUOS/info/catalogue/External - Ports/box/mice.png
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diff --git a/packaging/muos/MUOS/info/catalogue/External - Ports/text/Mice!.txt b/packaging/muos/MUOS/info/catalogue/External - Ports/text/Mice!.txt
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+Mice! is a strategic single-player game where you place bombs and mines to exterminate rats before they reproduce out of control. It features randomly generated mazes, sprite-based graphics, and sound effects. Inspired by the classic Rats! for Windows 95, this version is written in Python and uses a lightweight custom engine with SDL-style rendering.
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diff --git a/packaging/muos/MUOS/info/catalogue/External - Ports/text/mice.txt b/packaging/muos/MUOS/info/catalogue/External - Ports/text/mice.txt
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+Mice! is a strategic single-player game where you place bombs and mines to exterminate rats before they reproduce out of control. It features randomly generated mazes, sprite-based graphics, and sound effects. Inspired by the classic Rats! for Windows 95, this version is written in Python and uses a lightweight custom engine with SDL-style rendering.
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diff --git a/packaging/muos/README.md b/packaging/muos/README.md
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+This folder mirrors the muOS catalogue layout for Ports metadata.
+
+Target path on device:
+- `MUOS/info/catalogue/External - Ports/box/`
+- `MUOS/info/catalogue/External - Ports/text/`
+
+Source of truth:
+- `gameinfo.xml` for description and canonical stem
+- `cover.png` for box art
+
+Notes:
+- `mice.*` is the canonical metadata stem because `gameinfo.xml` points to `./mice.sh`.
+- `Mice!.*` is included as a compatibility alias for setups that expose the launcher as `Mice!.sh` in muOS.
+- If the visible launcher name changes again, add matching filenames in both `box/` and `text/`.
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