Localize marketplace metadata and group Three.js skills

Constraint: Chinese users need localized plugin and skill descriptions while third-party sources must remain syncable from upstream.

Rejected: Editing third-party generated files by hand | Sync would overwrite them and make localization drift from config.

Rejected: One plugin per Three.js skill | Users should install one domain package while Codex can still select individual skills inside it.

Confidence: high

Scope-risk: moderate

Directive: Keep plugin IDs and skill names in English kebab-case; put user-facing Chinese text in manifest fields, SKILL.md descriptions, or external-source overrides.

Tested: Codex manual confirms duplicate skills are not merged; powershell sync_external_plugins.ps1 with proxy; python scripts\\validate_marketplace.py; validate_plugin.py for all plugins; codex plugin list local marketplace; codex plugin add/remove eapil-threejs.

Not-tested: Codex Desktop visual refresh after pulling the updated remote marketplace.

README.md

@@ -47,16 +47,7 @@ Start a new Codex thread after installing so the new skills are loaded into cont
 - `eapil-pdf`
 - `eapil-pptx`
 - `eapil-xlsx`
-- `eapil-threejs-animation`
-- `eapil-threejs-fundamentals`
-- `eapil-threejs-geometry`
-- `eapil-threejs-interaction`
-- `eapil-threejs-lighting`
-- `eapil-threejs-loaders`
-- `eapil-threejs-materials`
-- `eapil-threejs-postprocessing`
-- `eapil-threejs-shaders`
-- `eapil-threejs-textures`
+- `eapil-threejs`
 - `superpowers`
 - `ui-ux-pro-max`
 
@@ -91,6 +82,8 @@ The sync script currently supports:
 - `codex-plugin`: mirrors an upstream Codex plugin repo, used for `obra/superpowers`.
 - `claude-skill`: converts one Claude-style skill directory into a Codex plugin, used for `nextlevelbuilder/ui-ux-pro-max-skill`.
 
+Use `manifestOverrides` and `skillDescriptions` in `config/external-sources.json` for local Chinese UI text and skill descriptions. These overlays are applied after each upstream sync, so do not edit generated third-party plugin files directly for localization.
+
 After sync, validate the marketplace:
 
 ```powershell
@@ -111,9 +104,11 @@ plugins/codex/
   plugins/eapil-xlsx/
     .codex-plugin/plugin.json
     skills/xlsx/
-  plugins/eapil-threejs-fundamentals/
+  plugins/eapil-threejs/
     .codex-plugin/plugin.json
     skills/threejs-fundamentals/
+    skills/threejs-materials/
+    skills/threejs-shaders/
   plugins/superpowers/
     .codex-plugin/plugin.json
     skills/