Publish current skill market snapshot

Constraint: EAPIL Skill Market is a distribution repository and intentionally does not preserve generated artifact history.

Rejected: Preserve generated plugin history | inflates clone and ZIP size for users.

Confidence: high

Scope-risk: moderate

Directive: Collapse market history again after public plugin updates.

Tested: python scripts/validate_marketplace.py; validate_plugin.py oh-my-codex; codex plugin add oh-my-codex@eapil-skill-market.

Not-tested: PowerShell sync script unavailable locally; Codex model-level smoke invocation timed out on remote request.

plugins/codex/README.md

@@ -0,0 +1,24 @@
+# Codex 插件市场目录
+
+这个目录是 EAPIL Codex 插件市场的稀疏安装入口。通常推荐从仓库根目录添加市场，并把稀疏路径留空；只有在需要减少拉取范围时才使用本目录。
+
+从仓库根目录安装市场：
+
+```powershell
+codex plugin marketplace add https://git.playones.com/arechen/EapilSkillMarket.git --ref main
+```
+
+使用稀疏路径安装市场：
+
+```powershell
+codex plugin marketplace add https://git.playones.com/arechen/EapilSkillMarket.git --ref main --sparse .agents --sparse plugins/codex
+```
+
+本地调试：
+
+```powershell
+codex plugin marketplace add .\plugins\codex
+codex plugin add docx@eapil-skill-market
+```
+
+每个 `plugins/<plugin-name>` 目录都是独立插件，用户可以只安装自己需要的插件。插件内可以包含一个或多个相关 Skill。