docs(showcase): say what the showcase proves, not only what it is not

README.md

@@ -52,7 +52,7 @@ The content is consumed by AI coding agents reading these files directly from a
 | **Templates** | A working Extensions Platform add-on starter, a headless batch script starter, and a GLB-in engine-ready asset pipeline |
 | **Snippets** | 27 small standalone Python files demonstrating canonical patterns |
 | **Examples** | Runnable headless scripts under [`examples/`](examples/). Each asserts an API contract and exits non-zero on failure. |
-| **Showcase** | Budget-conformance props under [`showcase/`](showcase/). Not examples. Conventions: [`showcase/README.md`](showcase/README.md) |
+| **Showcase** | Proof that the skills compose: each piece under [`showcase/`](showcase/) is one headless Python script that builds a game prop and runs the whole asset pipeline (cleanup, high-to-low bake, LODs, convex collider, engine export), asserting measured budgets on every LTS. Not API examples. Conventions: [`showcase/README.md`](showcase/README.md) |
 
 ## Quick start
 
@@ -130,7 +130,7 @@ per-script exit-code model, are in
 
 ## Examples and showcase
 
-**64 examples** in [`examples/`](examples/) are runnable, self-checking scripts: each asserts one API contract, carries a falsifier, and runs headless on Blender 5.2 LTS and 4.5 LTS in the `blender-smoke` workflow (5.1 on the weekly cron or by manual dispatch). Those whose contract is visible also render a still. **76 showcase pieces** in [`showcase/`](showcase/) are game props held to measured budgets (triangle counts, colliders, materials, real-world size); they are not examples. Conventions: [`showcase/README.md`](showcase/README.md).
+**64 examples** in [`examples/`](examples/) are runnable, self-checking scripts: each asserts one API contract, carries a falsifier, and runs headless on Blender 5.2 LTS and 4.5 LTS in the `blender-smoke` workflow (5.1 on the weekly cron or by manual dispatch). Those whose contract is visible also render a still. **76 showcase pieces** in [`showcase/`](showcase/) exist to show the skills working together at production scale: each is a single headless script that models a game prop, then runs it through the same cleanup, bake, LOD, collider and export steps the skills teach, and fails if a measured budget (triangle counts, colliders, materials, real-world size) is missed. They are not API examples. Conventions: [`showcase/README.md`](showcase/README.md).
 
 Browse both, with filters, full-size renders and each script's README, in the **[gallery](https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/)**.
 

showcase/README.md

@@ -2,6 +2,14 @@
 
 Budget-conformance props. **Not examples.**
 
+**Why it is here:** examples prove one API contract each; the showcase proves
+the contracts compose. Every piece is one headless Python script that models
+a game prop and runs it through the pipeline the skills teach
+(`ai-mesh-cleanup`, `bake-high-to-low`, LOD decimation, a convex collider,
+`engine-export-presets`), then asserts measured budgets on 4.5 LTS, 5.1 and
+5.2 LTS. Advice that breaks under real use tends to surface here first
+(the non-manifold collider in #386 did).
+
 An example witnesses one API contract and carries a falsifier that makes a
 real assertion fail. A recognizable crate witnesses no API contract.
 Forcing one into `examples/` produces a vacuous check. Showcase pieces