docs(builtin-skills): invite community skill sharing

Signed-off-by: wowo-zZ <zhenggui5228@126.com>

README.md

@@ -46,6 +46,20 @@ firewall, with the same polish you'd expect from a public registry.
 
 > ⭐ If SkillHub fits your team, **star** the repo to help other teams find it, and **Watch → Custom → Releases** to get notified when a new version ships.
 
+## Share Great Skills
+
+Great Skills become more valuable when they are shared. If you have a Skill that has
+proved useful in real work or everyday life, share it with the SkillHub community and
+help grow an open, practical Skill ecosystem. We welcome Skills for daily life, office
+work, learning and research, travel and events, content creation, data analysis, and
+software development—not only engineering workflows.
+
+High-quality community contributions may join the curated starter collection, making new
+SkillHub deployments useful from day one. You do not need to finish the full adaptation
+before joining in: [open an issue](https://github.com/iflytek/skillhub/issues/new/choose)
+with the Skill's source and the problem it solves, or submit a PR by following the
+[Skill sharing guide](./builtin-skills/README.md).
+
 ## Documentation
 
 - 📖 **[User Guide](https://iflytek.github.io/skillhub/)** — Skill publishing, search, CLI usage and other user guides

README_zh.md

@@ -35,6 +35,17 @@ SkillHub 是一个自托管平台，为团队提供私有的、受治理的智
 
 > ⭐ 如果 SkillHub 适合你的团队，欢迎 **Star** 本仓库帮助更多团队发现它；点 **Watch → Custom → Releases** 可在新版本发布时收到通知。
 
+## 分享优秀 Skill
+
+优秀的 Skill 在分享中产生更大价值。如果你有一个在真实工作或生活场景中反复打磨、确实好用的
+Skill，欢迎分享给 SkillHub 社区，与大家一起丰富开放、实用的 Skill 生态。无论是日常生活、
+办公协作、学习研究、旅行活动、内容创作、数据分析还是软件开发，都可以成为有价值的分享。
+
+经过验证的社区贡献还有机会进入精选 Skill 集合，让每个新部署的 SkillHub 开箱即用。不必完成
+全部适配后才能参与：你可以先[创建 issue](https://github.com/iflytek/skillhub/issues/new/choose)，
+说明 Skill 的来源和它解决的问题；也可以按照[Skill 分享指南](./builtin-skills/README.md)
+直接提交 PR。
+
 ## 文档
 
 - 📖 **[用户指南](https://iflytek.github.io/skillhub/)** — 技能发布、搜索、CLI 使用等用户操作指南

builtin-skills/README.md

@@ -22,7 +22,26 @@ The build writes deterministic, uncompressed ZIPs and `artifacts.json` to
 `builtin-skills/dist/`. The artifact index records each ZIP's SHA-256 for the release step; runtime
 manifest integration is maintained separately from the reviewed source collection.
 
-Do not copy a new upstream Skill directly into this directory. First pin an upstream commit,
-confirm redistribution terms, inspect every bundled file, add a realistic case to `evals.json`,
-and complete the same package and security review recorded in
-`docs/23-builtin-skills-first-round-test-report.md`.
+## Share a Skill with the Community
+
+A Skill shared with the community may be considered for the curated starter collection.
+To protect contributors and users, it should:
+
+- solve a clear, recurring task and add useful coverage to the starter collection;
+- identify its author, source, and terms that permit redistribution;
+- declare required tools, network access, credentials, and supported environments;
+- avoid hidden downloads, embedded secrets, and unconfirmed destructive or external actions;
+- pass package validation, security review, and at least one realistic usage test.
+
+You can start by
+[opening an issue](https://github.com/iflytek/skillhub/issues/new/choose) with the source
+URL and the problem the Skill solves. A complete pull request should:
+
+1. add the reviewed package under `builtin-skills/skills/<slug>/`, including `SKILL.md`,
+   `LICENSE.txt`, and `NOTICE.md`;
+2. record the pinned upstream commit and provenance in `catalog.json`;
+3. add a realistic regression case to `evals.json`;
+4. run `make test-builtin-skills`.
+
+Do not copy an upstream Skill into this directory without reviewing every bundled file and
+confirming that its license permits redistribution.