Disclosure: I am the author of #224 and tested this PR as part of the Community Contribution requirement.

Tested on Windows 11, Steam Client Stable, Millennium 3.4.0, using the exact pinned plugin commit b349cac37510647db747971aa5e6267b461d1d56.

Runtime results

• The plugin loaded without a backend and without making its own network requests.
• On CS2 (730) and Dota 2 (570), where Steam exposed a positive rt_purchased_time, the injected cards had non-empty text and followed the active app route correctly.
• On two owned games where that field was absent (105600 and 1604000), no empty/stale card was rendered.
• I found no Date added warnings or errors in webhelper_js.txt during navigation.
• Steam exposed two visible GameStatsSection hosts on both tested pages, and the plugin inserted a card into both. This may be intentional for responsive layouts, but it is worth manually confirming that the user never sees a duplicate in any library layout.

Issues found

1. The PluginDatabase build workflow is not currently reproducible from a clean checkout. Under Node 20.20.2, using the database's pnpm flow, the repository has no tracked pnpm-lock.yaml (only package-lock.json). pnpm install therefore resolved @steambrew/ttc from ^3.2.6 to 3.3.7 and its TypeScript peer to 7.0.2; pnpm run build failed, including TS5108 because moduleResolution=node10 is removed in TS 7, followed by a rollup-plugin-inject-process-env resolution error. Please commit a pnpm lockfile or pin a known-compatible toolchain and verify a clean Node 20 pnpm install && pnpm run build.
2. There is no unload cleanup. start() creates a permanent one-second interval, but the plugin returns no onDismount; removeCards() removes React hosts without calling root.unmount(). Disabling/reloading the plugin can therefore leave the interval and React roots alive. Returning a cleanup function that clears the interval, unmounts each root, and removes the hosts would make hot reload/disable safe.
3. plugin.json reports 1.0.1, while package.json reports 1.0.0.
4. The $schema URL currently returns 404 (src/sys/plugin-schema.json has moved), so editor validation is not working.
5. The package declares MIT and the README says MIT, but the pinned repository has no LICENSE file. Adding the actual license text would make the licensing claim verifiable.

The core feature behaved correctly in the routes I tested; the clean-build and lifecycle points are the main things I would address before publishing.