feat(showcase): add skate-ramp (sports)

The sixth piece in the sports category: a backyard quarter-pipe, 1.2 m
high on a 1.8 m transition, 2.44 m wide. Five plywood transition templates
(curved bands with a solid toe and an arm under the deck) on 2x4 sills with
studs and a back post sistered to their faces, a lip joist and rim joist;
nine 2x4 stringers under a two-layer 12 mm plywood skin whose joints are
offset between layers and land on stringers; 143 screws in rows over the
stringers; a 60 mm steel coping pipe 5 mm proud of the transition on five
welded, bolted tabs; a 6 mm steel kicker plate ground to a lip at the toe
on a timber toe block; a worn stencilled roundel and wheel marks on the
riding face. A skateboard rests on the deck: seven-ply maple deck with
concave and 19 deg kicktails under grip, two trucks (baseplate, raked
kingpin, bushings, cup washer, hanger, pivot arm, axle), four urethane
wheels on bearings. Nine materials.

Budgets (measured, 5.2.1): 31164 tris (30600-31700), LOD 0.5000/0.2200,
9 materials with face floors, UVs 0..1 no overlap, AABB 2.5293x2.4400x1.3389
(2.529x2.440x1.339 +-0.01), collider 350 (<=380), hygiene 0 incl. 0
coplanar cross-shell pairs, 5 sills + toe block + plate zmin 0; transition
circle R 1.80000 m, deviation 0.000 mm, tangent to the ground, deck 1.20000;
templates 2.00 mm into sills and 0.90-0.91 mm into the skin; coping straight,
parallel, reveal 5.00 mm, 3.86 mm above deck; plate step 0.01 mm, toe 0.80
mm; seams top 0.84/1.84, inner 1.24, stagger 0.400 m, 43.9 mm inside
stringers; screws 17.4 mm inside stringers, 17.0 mm inside sheets; wheels
0.50 mm into the deck, 0.000 mm off axles; 1 component (309 shells). Two
default runs print identical measurements.

Falsifiers (flag -> measured -> exit): --skip-decimate LOD1 1.0000 -> 9;
--stray-vert loose_v 1 -> 15; --lift-z zmin 0.05000 -> 16; --float-sill
middle sill zmin 0.003 -> 16; --short-rib edge bite -3.10 mm -> 17;
--small-wheel bite -1.50 mm -> 18; --sag-skin radius 1.77073, deviation
1.55 mm -> 19; --sink-coping reveal -1.00 mm -> 20; --proud-plate step
2.99 mm -> 21; --stack-seams stagger 0.010 m -> 22; --miss-screws 20.6 mm
past a stringer edge -> 23; --skew-wheel 2.00 mm off axle -> 24;
--lift-grip 2 components -> 25. Tris stay 31164 in every run; each piece
falsifier's budget_fails print lists only its own budget.

Blender: E:\Blender-Developer-Tools\.scratch\5.2\blender-5.2.1-windows-x64\blender.exe,
reports "Blender 5.2.1 LTS". 4.5 LTS left to CI.

Render: render_hero.py wrote hero and preview; framing fill x 0.703,
y 0.806, margins >= 0.044; asset-quality floors pass (edge90 0.082).

Asset sheet (docs/gallery/asset-sheets/skate-ramp.webp): not the
least-designed object; the hydrant and wheelbarrow are plainer. Isolated it
reads at once as a framed quarter-pipe with coping, plate, seams, screws,
roundel and board. Weak points: the panel's fixed fit crops the plate's
near corner, and the large riding face is the plainest area.

Contact sheet (docs/gallery/contact-sheets/skate-ramp-contact-sheet.webp):
luma 0.2408 against 0.2369-0.2428 (in band); stage 0.1919 against
0.1919-0.2517 (at the floor); saturation 0.2208 against 0.1525-0.2367;
wedge warmth +0.0033 inside -0.1440/+0.1052/+0.0921. Thumbnail legible.

Also updated: README, CLAUDE.md, AGENTS.md counts (56 -> 57), ROADMAP
Sports list (skate ramp struck as shipped), asset_sheet.py SELECT row,
catalog.json, plugin.json and the regenerated gallery. build_gallery,
check_site_links (112 pages, 0 failures), check_falsifier_targets,
check_exit_code_readme, check_engine_id, check_gallery_images and
check_import_export_rules pass.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: TMHSDigital

.cursor-plugin/plugin.json

@@ -194,6 +194,7 @@
     "showcase/archery-target",
     "showcase/cactus-garden",
     "showcase/espresso-machine",
-    "showcase/road-bicycle"
+    "showcase/road-bicycle",
+    "showcase/skate-ramp"
   ]
 }

AGENTS.md

@@ -21,7 +21,7 @@ classifies it as a `cursor-plugin`. This is content the AI loads when the user
 asks Blender questions or works on Blender add-ons in Cursor or Claude Code.
 
 The content base is 16 skills, 9 rules, 3 templates, 27 snippets, 60
-examples, and 56 showcase pieces (counts are CI-enforced against README.md)
+examples, and 57 showcase pieces (counts are CI-enforced against README.md)
 and the manifest). The full inventory tables and per-item purposes live in
 `CLAUDE.md`. Example anatomy and authoring rules: copy `examples/bmesh-gear/`;
 showcase conventions: `showcase/README.md`. The render look is specified

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, 60 total (+ gallery.json)
-showcase/<name>/               - Budget-conformance props, 56 pieces, each with a gallery `category` (sibling of examples/; see showcase/README.md § Categories)
+showcase/<name>/               - Budget-conformance props, 57 pieces, each with a gallery `category` (sibling of examples/; see showcase/README.md § Categories)
 scripts/build_gallery.py       - Regenerates docs/gallery/ from examples/gallery.json + showcase/gallery.json
 scripts/site/                  - Vendored landing-page build (Jinja2); tokens.css is the shared palette
 tests/check_site_links.py      - Internal link/anchor/alt gate over the built site (docs/)

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>60 examples</strong> &nbsp;&bull;&nbsp; <strong>56 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>60 examples</strong> &nbsp;&bull;&nbsp; <strong>57 showcase pieces</strong>
 </p>
 
 <p align="center">
@@ -37,7 +37,7 @@
 
 ## Overview
 
-This repository ships **16 skills, 9 rules, 3 templates, 27 snippets, 60 examples, and 56 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, 60 examples, and 57 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>56 showcase pieces</strong> — click to expand the preview grid</summary>
+<summary><strong>57 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 stencilled PORT ROYAL and NO 17, with iron corner brackets and an end handle, on a dark studio floor, warm wedge on the back wall" /></a>
@@ -165,6 +165,7 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
   <a href="showcase/cactus-garden/"><img src="showcase/cactus-garden/preview.webp" width="24%" alt="Cactus garden: a ribbed saguaro with three arms, rows of spines and cream flowers on its crown, a barrel cactus with red hooked spines and yellow fruit, a prickly pear with magenta fruit, an agave rosette and sandstone rocks on a raised sand disc, on a dark studio floor" /></a>
   <a href="showcase/espresso-machine/"><img src="showcase/espresso-machine/preview.webp" width="24%" alt="Espresso machine: a brushed stainless E61 espresso machine with twin gauges, a chrome group head and a walnut-handled portafilter over a shot cup, cups on its warmer tray, beside a tamper, milk pitcher and knock box on a stone counter" /></a>
   <a href="showcase/road-bicycle/"><img src="showcase/road-bicycle/preview.webp" width="24%" alt="Road bicycle: a deep red lugged-steel road bicycle leaning on its kickstand, with chromed lugs and fork socks, tan-wall 700c wheels, a honey leather saddle, cream-taped drop bars and a chain over a double crankset" /></a>
+  <a href="showcase/skate-ramp/"><img src="showcase/skate-ramp/preview.webp" width="24%" alt="Skate ramp: a plywood quarter-pipe with a steel coping and kicker plate, screw rows, sheet seams and a red stencilled roundel, its open side showing studs and sills, a skateboard on the deck" /></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.
@@ -275,6 +276,8 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
 
 [`road-bicycle`](showcase/road-bicycle/) — the fifth `vehicles` piece: procedural 1970s lugged-steel road bicycle leaning on its side kickstand (a 56 cm diamond frame in chromed, spear-pointed lugs, tapered stays with chrome tips, a chrome-crowned fork with socks; two 700c wheels of 36 spokes laced three-cross from both flanges of small-flange hubs to nipples through box-section rims, quick-release skewers, tan-wall tyres with a file-tread crown; a 52/42 crankset with quill pedals, toe clips and straps, a six-speed freewheel and a roller chain of 112 individual links solved round the ring, the cog and both jockeys; front and rear derailleurs, down-tube shifters, side-pull calipers, gum-hooded levers on cotton-taped drop bars, a quill stem, a leather saddle on rails, a bottle in a bolted cage), whose hubs coaxial with their dropouts, spoke seats in flange and nipple, wheels in the frame's plane, steering trail, three-cross lacing, chain seated on ring and cog, straight chain line, mass centre inside the tyres-and-foot triangle and one connected assembly are recomputed from the mesh, through the same pipeline. Falsifiers `--float-tyre` exits 16, `--slip-wheel` 17, `--short-spoke` 18, `--dish-wheel` 19, `--steep-head` 20, `--bunch-spokes` 21, `--lift-chain` 22, `--shift-rollers` 23, `--tuck-stand` 24, `--pop-bottle` 25.
 
+[`skate-ramp`](showcase/skate-ramp/) — the sixth `sports` piece: procedural backyard quarter-pipe, 1.2 m on a 1.8 m transition (five plywood transition templates on 2x4 sills with sistered studs and a back post, nine 2x4 stringers under a two-layer plywood skin with joints offset between layers and landing on stringers, screw rows over every stringer, a steel coping pipe on welded, bolted tabs, a steel kicker plate ground to a lip on a toe block, a worn stencilled roundel and wheel marks; a skateboard on the deck with a seven-ply concave deck, kicktails, grip tape, two trucks and four wheels on bearings), whose sills on the floor, templates seated on sills and under the skin, wheels on the deck, circular transition, coping reveal, flush kicker plate, staggered seams, screws over stringers, coaxial wheels and one connected assembly are recomputed from the mesh, through the same pipeline. Falsifiers `--float-sill` exits 16, `--short-rib` 17, `--small-wheel` 18, `--sag-skin` 19, `--sink-coping` 20, `--proud-plate` 21, `--stack-seams` 22, `--miss-screws` 23, `--skew-wheel` 24, `--lift-grip` 25.
+
 </details>
 
 ## Examples