This is a mock up of a way of defining web platform features based on support in different browsers. It has lots of missing pieces, including tools, an output format, and much more besides. This is meant to illustrate some ideas in a Google Doc; don't rely on it for anything at this point.

To learn more about this project, examine two key areas:

• Read web-platform-features/array.json, web-platform-features/array.2022.json, web-platform-features/array-grouping.json, and web-platform-features/array-relative-indexing.json to see one possible future for how feature groups may relate to each other.

• Read web-platform-features/temporal.json to see some of the challenges and quirks of tracking future feature groups.

• Read web-platform-features/consensus-web-2023.json to see how this approach might be used to version the entire web platform.

• Read base.schema.json to see how we might enforce the format of group files.

• Read query-results/bcd/javascript.builtins.Array*.json to see how we might query and summarize data found in external data sources, such as mdn/browser-compat-data.

• Read query-results/array*.json to learn how we might combine data from multiple queries together, in the group output.