[GavinWarner05]

By submitting this pull request, you agree to the contribution guidelines.

• Bug fix?
• New sample?
• Related issues: none found.
• Needs API permissions? No connectors or external API scopes.
• Has other prerequisites? Power Apps entitlement and maker permissions; Dataverse-enabled development environment for solution import.

What's in this Pull Request?

Adds a three-screen canvas app with twelve original fictional cards. Unlimited free three-card packs show 60/25/12/3 rarity odds, award unique missing cards before reveal, and distinguish New from Already owned without duplicate quantities. The binder combines ownership, rarity and search filters with completion progress; details show artwork and lore.

Ownership uses device-local SaveData/LoadData with an explicit save-failure warning and retry. Includes the Studio-exported app, unmanaged solution 1.0.0.3, extracted source, original SVGs, real player screenshots and setup/architecture notes. No purchases, currency, connectors or server provisioning are required by the app.

Validation: 22 local reference/source checks pass. Real Studio/player tests cover rarity boundaries, duplicate handling, repeated clicks, pre-reveal saving, mid-reveal navigation/reload and reset persistence. Export/unpack/repack and embedded/standalone source parity passed. Both exports have zero parser/binding errors and zero accessibility warnings; one intentional twelve-row catalogue advisory remains. The unchanged 1.0.0.3 solution imported successfully as New in a clean Developer target on 2026-10-18, and imported-player smoke tests passed; full screen-reader, phone and cross-browser coverage is not claimed.

Testing limitation: the first observed imported-player state contained 2/12 saved cards for an unestablished reason. A confirmed reset established the runtime-test baseline; pristine first-ever launch with an empty collection is not claimed.

Checklist

• My pull request affects only ONE sample.
• My sample includes a completed assets/sample.json metadata file.
• I have updated the sample's README.md.
• My README has at least one static high-resolution screenshot (i.e. not a GIF).
• My README contains complete setup instructions, including prerequisites and required permissions.
• The final line of my README contains the required repository-relative visitor stats image.

Clean-target validation

• Imported final 1.0.0.3 solution into a separate approved Developer target and recorded actual player results, including duplicates, interrupted reveal/reload, filters, navigation and reset.

[github-actions]

Validation failed!

File: samples/collectible-card-binder/assets/sample.json

• Invalid value '' for author's 'pictureUrl' property: Object reference not set to an instance of an object.

[VesaJuvonen]

Reviewed the current sample metadata, README/setup paths, source and unmanaged solution structure, and the recorded validation evidence. The earlier avatar metadata problem is resolved in the current head. The documented device-local persistence, layout, and clean-target validation limitations remain explicit; this review does not claim a fresh tenant import.

[VesaJuvonen]

Merged - thank you @GavinWarner05 for sharing Moonfield Archive and the detailed validation notes! Please submit a demo request at https://aka.ms/community/request/demo so we can schedule you for a live demo in a Microsoft 365 & Power Platform community call. We would love to see the sample in action.

[VesaJuvonen]

Follow-up validation: I ran all 22 dependency-free reference/source tests locally. Windows exposed three decoding errors in the test helpers due to the platform-default text encoding; #199 makes those reads explicitly UTF-8, after which all 22 tests pass. This does not change the app or claim fresh Power Fx/tenant execution.