feat: add cart showcase piece

Two-wheel wooden cart with budgets fitted to measured geometry on 4.5.11, 5.1.2, and 5.2.1.

Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: TMHSDigital

.cursor-plugin/plugin.json

@@ -147,6 +147,7 @@
     "showcase/treasure-chest",
     "showcase/terrain-scatter",
     "showcase/fence-kit",
-    "showcase/watchtower"
+    "showcase/watchtower",
+    "showcase/cart"
   ]
 }

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, 59
-examples, and 10 showcase pieces (counts are CI-enforced against README.md
+examples, and 11 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, 59 total (+ gallery.json)
-showcase/<name>/               - Budget-conformance props, 10 pieces (sibling of examples/; see showcase/README.md)
+showcase/<name>/               - Budget-conformance props, 11 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>10 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>11 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 10 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 11 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 (Cursor, Claude Code, any MCP-capable client) when working on Blender add-ons, geometry nodes scripts, batch pipelines, or animation tooling. There is no build step. Edit the markdown and Python files directly.
 
@@ -85,6 +85,7 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
 <a href="showcase/terrain-scatter/"><img src="showcase/terrain-scatter/preview.webp" alt="Terrain scatter: a Geometry Nodes dirt hill tile with bevelled masonry rocks on a dark studio floor" /></a>
 <a href="showcase/fence-kit/"><img src="showcase/fence-kit/preview.webp" alt="Fence kit: a timber post-and-rail section with pyramidal caps, iron shoes and straps on a dark studio floor" /></a>
 <a href="showcase/watchtower/"><img src="showcase/watchtower/preview.webp" alt="Watchtower: a timber lookout with X-braces, ladder, plank platform, and pyramidal roof on a dark studio floor" /></a>
+<a href="showcase/cart/"><img src="showcase/cart/preview.webp" alt="Cart: a two-wheel wooden cart with spoked wheels, slatted bed, and shafts on a dark studio floor" /></a>
 
 [`shipping-crate`](showcase/shipping-crate/) — procedural crate through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets. Falsifier `--skip-decimate` exits 9.
 
@@ -106,6 +107,8 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
 
 [`watchtower`](showcase/watchtower/) — procedural timber lookout with X-braces, ladder, platform, and pyramidal roof through the same pipeline. Falsifier `--skip-decimate` exits 9.
 
+[`cart`](showcase/cart/) — procedural two-wheel wooden cart with spoked wheels, slatted bed, and shafts through the same pipeline. Falsifier `--skip-decimate` exits 9.
+
 ## Examples
 
 Runnable, smoke-gated demos live in [`examples/`](examples/) — each is executed headless on

ROADMAP.md

@@ -114,6 +114,7 @@ Not committed; target list for the next content version. (v0.3.0 shipped the smo
 - ~~Procedural terrain or landscape showcase using Geometry Nodes scatter~~ **SHIPPED** as `showcase/terrain-scatter/` — GN sine-hill Mesh Grid, Index-jittered Instance-on-Points scatter replaced with bevelled masonry; `--skip-decimate` exits 9 on the LOD1 ratio band
 - ~~Hero prop with a more complex silhouette (lantern or treasure chest) as a second showcase piece~~ **SHIPPED** as `showcase/street-lantern/` and `showcase/treasure-chest/` — hanging iron lantern with muntined amber cage; slatted chest with iron bands and an open lid; `--skip-decimate` exits 9 on the LOD1 ratio band
 - ~~Timber watchtower showcase~~ **SHIPPED** as `showcase/watchtower/` — corner posts, X-braces, plank platform, ladder, pyramidal roof; `--skip-decimate` exits 9 on the LOD1 ratio band
+- ~~Two-wheel wooden cart showcase~~ **SHIPPED** as `showcase/cart/` — slatted bed, shafts, spoked wheels, iron hubs and axle; `--skip-decimate` exits 9 on the LOD1 ratio band
 - Wrought-iron park bench (slatted seat, scrolled legs) as a game-prop showcase piece
 - Wooden wheelbarrow (staved tray, single wheel, handles) as a game-prop showcase piece
 - ~~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