feat: add initial skill authoring workspace

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

skills/zhihu-write/references/publish-safety.md

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+# Publish Safety
+
+Publishing is the highest-risk action in this skill. Treat it as a gated operation.
+
+## Mandatory Safety Rules
+
+- Do not publish without explicit human confirmation in the current conversation.
+- Do not assume `publish: true` in an old request still reflects the user’s latest intent.
+- Do not treat a successful click as proof of publication.
+
+## What Must Be Verified
+
+At least one of these post-publish checks should succeed:
+
+- the final URL is a published Zhihu article URL
+- the visible page title matches the requested article title
+
+If both checks fail, report the run as unconfirmed.
+
+## Failure Cases
+
+### Title verification fails
+
+- Stop.
+- Report the expected title and the observed title.
+- Do not claim the article was published correctly.
+
+### URL remains in edit mode
+
+- Treat the result as draft or unconfirmed publish.
+- Report that the browser stayed on an editor-style URL.
+- Ask for manual review before any retry.
+
+### Publish dialog does not appear
+
+- Do not retry blindly on generic primary buttons.
+- Report that the dialog selector failed.
+- Revalidate selectors and page state first.
+
+## Brittle Selectors To Revalidate First
+
+- `div.css-1q62b6s > div.css-byu4by`
+- `textarea[placeholder='请输入标题（最多 100 个字）']`
+- `button.Button--primary.Button--blue`
+- `div[role='dialog'] button.Button--primary.Button--blue`
+- `h1`
+
+These are usable as source references, but not trustworthy forever.
+