feat(showcase): add wingback-armchair (household)

The seventh piece in the household category: a reading corner on a fringed
wool rug. A Queen Anne / Chesterfield wingback in oxblood leather: a
reclined back deep-button tufted with 13 buttons on a diamond lattice, each
in a funnelled dimple, pillows between them and sharp pleats along every
line joining two buttons (the grid is laid in the lattice's pitch and each
cell split along its nearest pleat); wings sweeping into rolled arms with a
tucked English roll, crowned scroll fronts, piped welts and brass nailhead
rows; a nailed front rail; a crowned cushion with piped welts on both
seams; cabriole front legs on pad feet, splayed rear legs in brass
ferrules. Beside it a walnut tripod side table with a brass reading lamp
(knopped stem, harp, finial, spider, linen shade) and two cloth-bound
books. Nine materials.

Budgets (measured, 5.2.1): 44324 tris (43700-44900), LOD 0.5000/0.2200,
9 materials with face floors, UVs 0..1 no overlap, AABB 2.0304x1.4000x1.1600
(+-0.01), collider 802 (<=820), hygiene 0 incl. 0 coplanar cross-shell
pairs, zmin 0; 4 chair + 3 table feet sunk 0.0020 m into the rug
(0.0008-0.0040); legs tenoned 0.0288-0.0319 m (0.012-0.045); 13 buttons
seated 0.0025 m (0.0012-0.0045), proud 0.0074 m, dimples 0.0169-0.0185 m
(min 0.008); body mirror 0.000000 m over 10620 verts (max 0.0005), seat
0.4531, back 1.1113, width 0.8683 m; 16 lattice pairs 0.16169-0.16258 m,
spread 0.00089 (max 0.004); table+lamp+books mass centre 0.0922 m inside
the feet (min 0.045); cushion rest 0.0020 m (0.0008-0.0040); nails 28+28+19
at 0.03000 m, spread 0, seated 0.0010-0.0013 m. Two default runs print
identical measurements.

Falsifiers (flag -> measured -> exit), run against this code:
--skip-decimate LOD1 1.0000 -> 9; --stray-vert loose_v 1 -> 15; --lift-z
zmin 0.05000 -> 16; --float-foot table pad -0.00100 m -> 16; --short-legs
rear leg bite -0.0038 m -> 17; --sink-buttons seat 0.00850, proud 0.00140
-> 18; --odd-wing mirror 0.006000 m -> 19; --drift-buttons lattice spread
0.01358 m -> 20; --narrow-tripod margin 0.0280 m -> 21; --lift-cushion
rest -0.00300 m -> 22; --bunch-nails spread 0.02699 m -> 23. Tris and AABB
unchanged in every run; each piece falsifier's budget_fails 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 0.741,
y 0.867, margins >= 0.056; asset-quality floors pass (edge90 0.048).

Asset sheet (docs/gallery/asset-sheets/wingback-armchair.webp): not the
least-designed object; the hydrant is plainer. Isolated it reads at once as
a tufted leather wingback with nailed scroll arms, cushion, cabriole legs,
lamp table and fringed rug. Weak points: the outer wing and outer arm
panels are plain leather (as on the real chair, carried by the material),
and the vignette's width keeps the chair to about half its panel.

Contact sheet (docs/gallery/contact-sheets/wingback-armchair-contact-sheet.webp):
luma 0.2404 against 0.2369-0.2428 (in band, after relighting from 0.2517);
stage 0.2374 against 0.1919-0.2517; saturation 0.2398 against
0.1525-0.2367 (0.003 over the top, after muting the oxblood and rug dyes
from 0.2646; office-chair ships at 0.2393); wedge warmth -0.0112 inside the
-0.1440/+0.1052 spread. Thumbnail legible.

Also updated: README, CLAUDE.md, AGENTS.md counts (58 -> 59), ROADMAP
Household list (wingback armchair struck as shipped), asset_sheet.py SELECT
row, catalog.json, plugin.json and the regenerated gallery. build_gallery,
check_site_links (114 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

@@ -196,6 +196,7 @@
     "showcase/espresso-machine",
     "showcase/road-bicycle",
     "showcase/skate-ramp",
-    "showcase/palm-tree"
+    "showcase/palm-tree",
+    "showcase/wingback-armchair"
   ]
 }

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 58 showcase pieces (counts are CI-enforced against README.md)
+examples, and 59 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, 58 pieces, each with a gallery `category` (sibling of examples/; see showcase/README.md § Categories)
+showcase/<name>/               - Budget-conformance props, 59 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>58 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>59 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 58 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 59 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>58 showcase pieces</strong> — click to expand the preview grid</summary>
+<summary><strong>59 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>
@@ -167,6 +167,7 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
   <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>
   <a href="showcase/palm-tree/"><img src="showcase/palm-tree/preview.webp" width="24%" alt="Palm tree: a coconut palm leaning on a raised disc of beach sand, its ringed trunk curving up to a crown of drooping pinnate fronds over green coconuts, fallen coconuts, a frond and driftwood below" /></a>
+  <a href="showcase/wingback-armchair/"><img src="showcase/wingback-armchair/preview.webp" width="24%" alt="Wingback armchair: an oxblood leather wingback with a deep-button tufted back, rolled arms trimmed with brass nailheads and a piped seat cushion, beside a side table with a brass reading lamp and books on a fringed rug" /></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.
@@ -281,6 +282,8 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
 
 [`palm-tree`](showcase/palm-tree/) — the sixth `nature` piece: procedural coconut palm on a raised disc of rippled beach sand (a 4.47 m trunk rising from a swollen, lobed bole with a mat of 24 roots flaring out into the sand, leaning along a curve and coming back upright under the crown, tapering, ringed with 25 leaf scars at an even pitch; a fibrous boss of leaf bases carrying eighteen pinnate fronds in a golden-angle spiral, each a curved, drooping rachis with 36 pairs of folded leaflets hanging below it in a V, young fronds rising and old ones hanging; two dead fronds, two spear leaves and twelve green and ripening coconuts in bunches under the frond bases; two fallen coconuts, a fallen frond, driftwood, seashells and sea grass), whose fronds seated in the crown, coconuts attached under it, trunk height and lean with the crown's mass inside the root plate, leaf-scar rings at an even pitch, trunk and roots bedded in the sand, fallen coconuts resting in it and beach litter joined to it are recomputed from the mesh, through the same pipeline. Falsifiers `--short-petioles` exits 17, `--drop-coconut` 18, `--short-roots` 19, `--bunch-rings` 20, `--perch-trunk` 21, `--float-nuts` 22, `--float-cover` 23.
 
+[`wingback-armchair`](showcase/wingback-armchair/) — the seventh `household` piece: procedural reading corner on a fringed wool rug (a Queen Anne / Chesterfield wingback in oxblood leather: a reclined back deep-button tufted with thirteen buttons on a diamond lattice, each seated in a funnelled dimple, the leather puffed into pillows and folded into sharp pleats along every line joining two buttons; wings sweeping forward into rolled arms with a tucked English roll, crowned scroll fronts, piped welts and rows of brass nailheads, a nailed front rail, a loose crowned cushion with piped welts on both seams, cabriole front legs on pad feet and splayed rear legs in brass ferrules; beside it a walnut tripod side table with a brass reading lamp, a linen shade and two cloth-bound books), whose feet sunk into the rug, legs tenoned into the body, buttons seated in their dimples, mirror symmetry and size, diamond lattice, table's mass centre inside its feet, cushion resting on the deck and evenly spaced, seated nailheads are recomputed from the mesh, through the same pipeline. Falsifiers `--float-foot` exits 16, `--short-legs` 17, `--sink-buttons` 18, `--odd-wing` 19, `--drift-buttons` 20, `--narrow-tripod` 21, `--lift-cushion` 22, `--bunch-nails` 23.
+
 </details>
 
 ## Examples