The Needle — one dial, three clocks

Description and use

Needle is a single dial UI that displays the active rules for three MTG tables (Tabletop, Magic Online, Arena) based on the selected date, simplifying rule lookup.

Problem

Teams need a single UI element that shows which of three MTG rules tables (Tabletop, Magic Online, Arena) is active on a given date, without having to navigate separate dashboards.

Outcome

The Needle provides a unified, interactive view of rule applicability across three MTG tables, reducing navigation overhead and improving consistency.

Workflow

• 1. User opens the Needle dial at https://luiscore.com/errata-desk/needle.
• 2. The dial displays three rings representing June 1‑4.
• 3. User turns the dial to a specific date (e.g., June 3).
• 4. Needle posts a query to the Errata Desk backend: "On Jun N 2020, what does each table do?".
• 5. Backend runs initial_context, array_field_reader on the clocks, and a GROQ query to fetch rule documents with matching effectiveFrom/effectiveUntil.
• 6. The dial renders the rule text for Tabletop, Magic Online, and Arena side‑by‑side.
• 7. Users can read the active rule without leaving the dial view.

Evidence

The Needle is not a chat. It is a dial.

Source

The content is the Errata Desk lake: rulesClaim documents with effectiveFrom and effectiveUntil, plus the three clocks on rules-change-companion.

Source

Turn it: https://luiscore.com/errata-desk/needle

Source