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docs(meta): T-1143 rulings — D-226(d) floor opened, progressive-tiling planetary carrier, continuous seam zoom; implementation chain T-1149..T-1155

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Jeroen's three rulings on the zoom-ladder design pass, recorded as a
D-226 amendment: (1) 'we set a new BHAG so old restrictions are up for
debate' — the item-(d) ceiling opens for the Atlas windowed viewport
(below-quarter rungs gated on the T-1154 measurement pass; chunk/tile
still never a whole-body planetary layer); (2) planetary rung ships as
progressive capped-density tiling on the generalized district_window
carrier; (3) planetary->regional entry becomes continuous cursor-anchored
zoom with full-zoom-out resetting to the canonical orbital frame (D-013
zoom-owns-descent restored; click-through cut superseded).

Design doc stamped with the resolved rulings. T-1143 closed. Implementation
chain: T-1149 (derive_at_metres + octave cutoff) -> T-1150 (granularity
carrier + aliasing test) / T-1151 (window par_iter) -> T-1152 (derived
planetary rung) / T-1153 (client continuous ladder) -> T-1155 (smoothing
retirement); T-1154 below-quarter measurement gate.
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2026-07-21 21:52:55 +02:00
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@@ -184,6 +184,13 @@ Findings not folded into the sections above as fixes, carried here as explicit r
## 10. Decisions for Jeroen
> **RESOLVED — Jeroen's rulings, 2026-07-21 (recorded as a D-226 amendment):**
> 1. **Floor:** *"we set a new BHAG so old restrictions are up for debate"* — the D-226(d) ceiling is opened for the Atlas ladder; "down to tile scale" reads literally. Below-quarter rungs (block/tile) are implementation-gated on their own measurement pass; chunk/tile output still never appears as a whole-body planetary layer.
> 2. **Planetary carrier:** progressive capped-density tiling on the generalized `district_window` carrier (Option B, as recommended).
> 3. **Entry seam:** continuous cursor-anchored zoom through planetary→regional, superseding the click-through-only cut — with the condition that a **full zoom-out resets to the original canonical planetary frame and location**. D-013's "zoom gesture owns spatial descent" is restored for this seam.
>
> The options below are preserved as the decision's context.
### D-226(d) floor question (the item-(c) question T-1143 was explicitly told to reserve)
The mandate says "down to tile scale" (D-166); D-226(d)/T-1112 §2 hard-codes: *"If a future ticket wants finer planetary-scale detail than this, the answer is 'no' per item (d), not 'extend this struct' … by construction, not by restraint that could erode."* These two records are in tension and this pass does not resolve it — it presents options: