feat(showcase): add wooden-yoke

The wooden yoke was the first unclaimed showcase candidate. What an
envelope check cannot see on a yoke is whether each bow still closes
round a neck: a bow bent too tight still stands on the floor, passes
up through the beam, takes its pins and fits the bounding box. The
piece measures each opening between the bow legs and up to the
saddle off the mesh; --pinch-bows exits 19 at 196 mm while every
other budget and the envelope still pass.

Also asserts the legs stand proud of the beam, the staple bites it,
the ring is threaded along and hung on the staple's bar, the pins
rest on the beam and the bows are mirrored, each with a falsifier
proven on 4.5.11, 5.1.2 and 5.2.1.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>

Author: TMHSDigital

.cursor-plugin/plugin.json

@@ -169,6 +169,7 @@
     "showcase/rope-bridge",
     "showcase/grain-sacks",
     "showcase/brazier",
-    "showcase/apothecary-shelf"
+    "showcase/apothecary-shelf",
+    "showcase/wooden-yoke"
   ]
 }

CLAUDE.md

@@ -22,7 +22,7 @@ rules/<rule-name>.mdc          - Anti-pattern rules, 9 total
 templates/<template-name>/     - Starter projects, 3 total
 snippets/<snippet-name>.py     - Standalone code patterns, 27 total
 examples/<name>/               - Runnable smoke-gated examples, 59 total (+ gallery.json)
-showcase/<name>/               - Budget-conformance props, 32 pieces (sibling of examples/; see showcase/README.md)
+showcase/<name>/               - Budget-conformance props, 33 pieces (sibling of examples/; see showcase/README.md)
 scripts/build_gallery.py       - Regenerates docs/gallery/ from examples/gallery.json + showcase/gallery.json
 scripts/site/                  - Vendored landing-page build (Jinja2)
 docs/gallery/                  - Committed generated gallery pages + hero renders

README.md

@@ -18,7 +18,7 @@
 </p>
 
 <p align="center">
-  <strong>16 skills</strong> &nbsp;&bull;&nbsp; <strong>9 rules</strong> &nbsp;&bull;&nbsp; <strong>3 templates</strong> &nbsp;&bull;&nbsp; <strong>27 snippets</strong> &nbsp;&bull;&nbsp; <strong>59 examples</strong> &nbsp;&bull;&nbsp; <strong>32 showcase pieces</strong>
+  <strong>16 skills</strong> &nbsp;&bull;&nbsp; <strong>9 rules</strong> &nbsp;&bull;&nbsp; <strong>3 templates</strong> &nbsp;&bull;&nbsp; <strong>27 snippets</strong> &nbsp;&bull;&nbsp; <strong>59 examples</strong> &nbsp;&bull;&nbsp; <strong>33 showcase pieces</strong>
 </p>
 
 <p align="center">
@@ -37,7 +37,7 @@
 
 ## Overview
 
-This repository ships **16 skills, 9 rules, 3 templates, 27 snippets, 59 examples, and 32 showcase pieces** for Blender Python development targeting Blender 5.2 LTS (current stable) with Blender 4.5 LTS fallback support. Blender 5.1 is prior stable.
+This repository ships **16 skills, 9 rules, 3 templates, 27 snippets, 59 examples, and 33 showcase pieces** for Blender Python development targeting Blender 5.2 LTS (current stable) with Blender 4.5 LTS fallback support. Blender 5.1 is prior stable.
 
 The content is consumed by AI coding agents reading these files directly from a checkout — **there is no MCP server in this repository, and none is required**. Cursor applies `rules/*.mdc` automatically wherever their scope globs match and takes skills by name in chat; Claude Code reads `skills/` and `rules/` from the project workspace, or from this repo kept as a referenced checkout. Any agent that can read files in a workspace can use it the same way. There is no build step for the content — edit the Markdown and Python files directly.
 
@@ -106,7 +106,7 @@ per-script exit-code model, are in
 Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](showcase/README.md).
 
 <details>
-<summary><strong>32 showcase pieces</strong> — click to expand the preview grid</summary>
+<summary><strong>33 showcase pieces</strong> — click to expand the preview grid</summary>
 
 <p align="center">
   <a href="showcase/shipping-crate/"><img src="showcase/shipping-crate/preview.webp" width="24%" alt="Shipping crate: a wooden slat crate with iron corner brackets on a dark studio floor, warm wedge on the back wall" /></a>
@@ -141,6 +141,7 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
   <a href="showcase/grain-sacks/"><img src="showcase/grain-sacks/preview.webp" width="24%" alt="Grain sacks: three burlap sacks gathered and tied with twine, two standing and one lying slumped in front, one blue-striped and one red-striped, on a dark studio floor" /></a>
   <a href="showcase/brazier/"><img src="showcase/brazier/preview.webp" width="24%" alt="Brazier: an iron fire bowl with a rolled rim on three S-curved forged legs, holding ash and a heap of glowing charcoal, on a dark studio floor" /></a>
   <a href="showcase/apothecary-shelf/"><img src="showcase/apothecary-shelf/preview.webp" width="24%" alt="Apothecary shelf: a stained wooden shelf unit with an arched crest, gallery rails and three drawers, stocked with labelled glass bottles, flasks and glazed jars, on a dark studio floor" /></a>
+  <a href="showcase/wooden-yoke/"><img src="showcase/wooden-yoke/preview.webp" width="24%" alt="Wooden yoke: a carved oak ox yoke with upturned ends standing on two bent hickory oxbows pinned above the beam, with an iron ring hung under its centre, on a dark studio floor" /></a>
 </p>
 
 [`shipping-crate`](showcase/shipping-crate/) — procedural crate through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets. Falsifier `--skip-decimate` exits 9.
@@ -203,6 +204,8 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
 
 [`apothecary-shelf`](showcase/apothecary-shelf/) — procedural apothecary shelf stocked with fifteen labelled bottles, flasks and jars, whose headroom under the shelf above is recomputed per vessel, through the same pipeline. Falsifiers `--tall-flask` exits 20, `--short-shelves` exits 17.
 
+[`wooden-yoke`](showcase/wooden-yoke/) — procedural double ox yoke on two bent hickory bows with a hung ring, whose neck openings are measured between the bow legs and up to the saddles, through the same pipeline. Falsifiers `--pinch-bows` exits 19, `--edge-on-ring` exits 17.
+
 </details>
 
 ## Examples

ROADMAP.md

@@ -137,7 +137,8 @@ Not committed; target list for the next content version. (v0.3.0 shipped the smo
 - ~~Grain sacks (cloth sacks, some slumped, tied necks) as a game-prop showcase piece~~ **SHIPPED** as `showcase/grain-sacks/` — three settled, pleated burlap sacks, one lying, twine ties seated in the neck waist, sacks pressed into one another; flat contact patch summed from the mesh, `--round-bottom` exits 19 on it while zmin still passes
 - ~~Brazier (iron bowl on legs, coals, ash) as a game-prop showcase piece~~ **SHIPPED** as `showcase/brazier/` — spun bowl with a rolled rim, three one-sweep forged legs, ash bed biting the wall, 36 cleaved coals packed without interpenetration; tip angle from a density-weighted mass centre and the support polygon, `--tuck-legs` exits 19 on it while the feet still ground
 - ~~Apothecary shelf (shelf unit, bottles and jars of varied form) as a game-prop showcase piece~~ **SHIPPED** as `showcase/apothecary-shelf/` — housed shelves, gallery rails, lapped back boards, a drawer bank and an arched crest, stocked with fifteen lathed vessels in five forms, each corked or lidded and labelled on its own rings; per-vessel headroom under the member above is read off the mesh, `--tall-flask` exits 20 on it while every seat and the envelope still pass
-- Wooden yoke (oxbow, iron rings) as a game-prop showcase piece
+- ~~Wooden yoke (oxbow, iron rings) as a game-prop showcase piece~~ **SHIPPED** as `showcase/wooden-yoke/` — lofted oak beam with neck saddles and upturned ends, two bent-hickory bows through it and pinned above it, a staple and a threaded hung ring; each neck opening measured between the bow legs and up to the saddle, `--pinch-bows` exits 19 on it while the bows still ground and the envelope is unchanged
+- Ox cart tongue or plough beam that hitches to the yoke's ring as a game-prop showcase piece — a hitch is a ring-on-hook contact the yoke's hung ring only tests against a fixed bar
 - Butter churn (staved tub, lid, dasher) as a game-prop showcase piece
 - Bookshelf with leaning books (upright and toppled volumes of varied size, one leaning on its neighbour) as a game-prop showcase piece — the lean needs a contact budget the apothecary shelf's upright vessels never exercised: each leaning book rests on its neighbour's spine edge and on the shelf, not in either
 - ~~Small modular kit showcase on recognizable geometry (`modular-kit-snap` contract)~~ **SHIPPED** as `showcase/fence-kit/` — tiling post-and-rail section (AABB X is the tile width; does not re-witness the snap contract); `--skip-decimate` exits 9 on the LOD1 ratio band

docs/gallery/asset-sheets/wooden-yoke.webp

@@ -291,7 +291,7 @@ <h1>Examples and Showcase</h1>
             autocomplete="off" spellcheck="false" aria-label="Search examples and showcase pieces" />
           <button class="q-clear" id="qClear" type="button" aria-label="Clear search" hidden>&times;</button>
         </div>
-        <span class="count" id="count" role="status" aria-live="polite">51 examples, 32 showcase pieces</span>
+        <span class="count" id="count" role="status" aria-live="polite">51 examples, 33 showcase pieces</span>
         <div class="density" role="group" aria-label="Card density">
           <button class="density-btn" data-density="compact" type="button" aria-pressed="false">Compact</button>
           <button class="density-btn" data-density="detailed" type="button" aria-pressed="false">Detailed</button>
@@ -1254,6 +1254,17 @@ <h2><a href="apothecary-shelf/">apothecary-shelf</a></h2>
           <a class="card-link" href="apothecary-shelf/">View showcase piece<span class="sr-only"> apothecary-shelf</span> <span aria-hidden="true">&rarr;</span></a>
         </div>
       </article>
+      <article class="card" data-tags="mesh export showcase">
+        <a class="card-media" href="wooden-yoke/" tabindex="-1" aria-hidden="true">
+          <img src="assets/wooden-yoke-hero.webp" alt="A carved oak ox yoke with upturned ends standing on two bent hickory bows pinned above the beam, with a rusted iron ring hung from a staple under its centre." loading="lazy" decoding="async" />
+        </a>
+        <div class="card-body">
+          <h2><a href="wooden-yoke/">wooden-yoke</a></h2>
+          <p class="teaches">A procedural double ox yoke — a carved oak beam with neck saddles and upturned ends on two bent hickory bows pinned above it, with a staple and a hung iron ring — carried through UVs, bake, LOD, compound collider, and Unity glTF, asserting recomputed budgets rather than an API contract.</p>
+          <p class="witnesses"><span class="tag">witnesses</span> Recomputed: 5288 tris, three materials with 1088 oak, 720 hickory and 936 iron faces, UVs in 0..1 with zero AABB overlap, outer AABB 1.424×0.140×0.640 m, zmin 0, hygiene 0 including zero coplanar cross-shell pairs, both bows standing on the floor, every leg 52.7 mm proud of the beam, the staple 17.5 mm into it, four pins resting 1.5 mm into its crown, a ring threaded along the staple&#x27;s bar and hung 1.0 mm onto it, two mirrored bows, and each neck opening 266 mm wide and 371 mm high. --pinch-bows exits 19 at 196 mm while the bows still ground and the envelope is unchanged; --edge-on-ring exits 17.</p>
+          <a class="card-link" href="wooden-yoke/">View showcase piece<span class="sr-only"> wooden-yoke</span> <span aria-hidden="true">&rarr;</span></a>
+        </div>
+      </article>
     </div>
     <p class="noresults" id="noResults" hidden>Nothing matches the current filters.
       <button class="chip" id="resetFilters" type="button">Clear search and tags</button></p>
@@ -1283,7 +1294,7 @@ <h2><a href="apothecary-shelf/">apothecary-shelf</a></h2>
       var tagsToggle = document.getElementById('tagsToggle');
       var toTop = document.getElementById('toTop');
       var total = cards.length;
-      var COUNT_LABEL = '51 examples, 32 showcase pieces';
+      var COUNT_LABEL = '51 examples, 33 showcase pieces';
       var LS_KEY = 'bdt-gallery-density';
       var reduced = window.matchMedia && window.matchMedia('(prefers-reduced-motion: reduce)').matches;