docs(meta): D-255 body-map-viewer stepped render architecture + deprecation sweep

D-255 filed (server-determines-content / client map-art function / stepped
six-level ladder Global+Region→Chunk / tagged-envelope wire discharging D-225 /
three-tier cache with distinct staleness-storage axes / cache-accelerated-pure-
function seed-chaining / lakes from settled hydrology, endorheic cue =
outflow-course presence). Twelve in-place amendments: D-166 corollary repoint,
D-192 persistent-cache boundary, D-225 deferral discharged, D-226 consolidated
(ceiling re-scope, select_rung→step-index, stepped transport, item-(d)
per-request + retention cap + chunk-floor partial restore, courses gloss +
cliff sparse-list), D-227 four-part (TTL-split, version tag, seed-chaining,
lakes), D-243 gridunit vocabulary. Clerk-audit fixes: atlas-zoom-ladder-t1143
superseded banner, CLAUDE.md Phase-4 cascade row updated to the stepped model,
Q-093 prior-art cross-ref. river-courses-t1170 carrier gloss. governance
README index regenerated (109 decisions through D-255); validate clean, sync
1344 refs 0 broken. Ticket chain T-1181–T-1185 + reconciliations in changelog.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/architecture/atlas-zoom-ladder-t1143.md

@@ -2,13 +2,28 @@
 title: "Atlas Zoom Ladder — T-1143 Design Pass"
 description: Continuous-derivation zoom ladder from planetary map to tile scale, per D-166's 2026-07-21 amendment + corollary
 type: design
-status: draft — pending Jeroen decisions
+status: superseded — by D-255 (body-map-viewer stepped render architecture)
 round: T-1143
 created: 2026-07-21
+superseded: 2026-07-24
 ---
 
 # Atlas Zoom Ladder — T-1143 Design Pass
 
+> **SUPERSEDED (2026-07-24) by [D-255](../../governance/decisions/architecture.md#d-255)
+> — the body-map-viewer stepped render architecture** (workshop:
+> `docs/workshops/body-map-viewer/`). The continuous canvas-resolution-sampling
+> model, the `select_rung`/`MAX_COVERAGE_M` coverage-ceiling walk, the
+> granularity-parameter serving sketch, and the "down to tile scale" floor this
+> pass designed are all replaced: zoom is **stepped** (six levels — the Global
+> body-surface opener + five fixed rungs Region→District→Quarter→Block→Chunk,
+> chunk 64 m the deepest; tile/voxel re-closed for the Atlas), content
+> determination is server-side per-step data canvases on a tagged-envelope
+> carrier, and the client is a map-art function (RTT terrain + screen-space
+> annotations — no zoom-scaled canvas). This document remains as the historical
+> record of the design pass and the measured §7 cost tables it produced (which
+> the D-255 measurement appendix extends). Do not implement from this file.
+
 Contributors: Tyre (architecture), Dudley (derivation/cost), Araminta (encoding), Troblum (adversarial critique), Qatux (synthesis). Grounded in D-166 (+ 2026-07-21 amendment & corollary), D-226 (+ T-1112/T-1124/T-1145 amendments), D-227 (+ T-1125), D-243, D-201, T-1143 full ticket text.
 
 ---

docs/architecture/river-courses-t1170.md

@@ -7,6 +7,8 @@ round: T-1170
 created: 2026-07-23
 ---
 
+> **Note (2026-07-24, body-map-viewer workshop — D-255):** the carrier three-way rule below (Ruling 1c / Ruling 6) survives unchanged in substance. Two terminology/scope updates from D-255: **(1)** "the windowed payload" is repointed to "the per-step data-canvas payload — formerly the `district_window` field, now the tagged step-canvas envelope" (D-226 2026-07-23 amendment / D-255 §c). **(2)** Rule (iii) — *rung-indexed invented detail rides the windowed payload regardless of geometric kind* — gains a second vector member alongside `courses`: **`cliffs: Vec<CliffSegment>`** (carved-gorge geometry: dominant `elevation` + per-segment `channel_depth` + `cliff_edge`), a sparse list zero-length when nothing is carved (T-1177 population survey: zero carved cells across all 267 real bodies), Phase-4 Atlas scope. Governance capture is in the D-226 and D-227 body-map-viewer amendments; this note only glosses the design doc so its "windowed payload" language stays current.
+
 *cracks knuckles* — I've read both tickets in full, the D-226 amendment block (wave-1 carrier note, two-waterline note, T-1137 queue ruling, windowed-family ceiling), D-227, D-243, and the T-1143 zoom-ladder serving model. The audits are code-true and the tension called out in point 1 is real — I created it, and it resolves cleanly once the carrier rule is split on the right axis. Ruling follows.
 
 ---