refactor: 通用技能按类别拆分为独立目录

skills/ → skills-dev(9), skills-req(10), skills-ops(4),
skills-integration(8), skills-biz(4), skills-workflow(7)

generate-marketplace.py 改为自动扫描所有 skills-* 目录。

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

skills-workflow/search-sessions-plugin/skills/SKILL.md

@@ -0,0 +1,128 @@
+---
+name: search-sessions
+description: Search saved Claude sessions by title, tags, date, or content
+---
+
+# Search Sessions Skill
+
+You are now in session search mode. Your task is to help the user find saved conversations.
+
+## Instructions
+
+1. **Read Index**: Load `~/.claude/sessions/index.json` to get the list of all sessions
+   - If file doesn't exist, inform user no sessions have been saved yet
+
+2. **Parse Search Query**: Understand what the user is looking for:
+   - Keywords in title or summary
+   - Specific tags (e.g., "react", "bug-fix", "authentication")
+   - Date range (e.g., "last week", "January 2026", "today")
+   - Combination of filters
+   - Special flags like "--all" to show all results
+
+3. **Search Logic**:
+   - First search in index.json (fast search by title, tags, date, summary preview)
+   - If user needs full content search, load individual session JSON files from `~/.claude/sessions/`
+   - Support case-insensitive search
+   - Support partial matches
+   - Score results by relevance
+
+4. **Display Results**: Show matching sessions in a clear, readable format:
+   ```
+   🔍 Found 3 sessions matching "react":
+
+   1. [2026-01-20_1430] Implement Dark Mode Toggle Feature
+      📅 2026-01-20 14:30 | 🏷️ react, css, ui, feature
+      💡 Added dark mode toggle to application settings...
+
+   2. [2026-01-19_1015] Debug Memory Leak in React Component
+      📅 2026-01-19 10:15 | 🏷️ react, debugging, performance
+      💡 Investigated and fixed memory leak caused by...
+
+   3. [2026-01-18_1600] Setup Authentication with JWT
+      📅 2026-01-18 16:00 | 🏷️ authentication, jwt, security
+      💡 Implemented JWT-based authentication system...
+
+   To reload a session: /reload-session <id>
+   ```
+
+5. **Advanced Search**:
+   - Support filtering by multiple tags: "react AND authentication"
+   - Support OR logic: "react OR vue"
+   - Support date ranges: "between 2026-01-01 and 2026-01-20"
+   - Support exclusion: "react NOT bug"
+   - Support tag-specific search: "tag:authentication"
+
+## Search Examples
+
+**By keyword:**
+- `search sessions about react` → Search for "react" in title, tags, and summary
+
+**By date:**
+- `find sessions from last week` → Filter by date range (last 7 days)
+- `sessions from January` → Filter by month
+- `sessions today` → Today's sessions only
+
+**By tag:**
+- `search sessions tagged authentication` → Filter by specific tag
+- `sessions with tag:bug-fix` → Explicit tag search
+
+**List all:**
+- `list all sessions` → Show all sessions (newest first)
+- `show recent sessions` → Show last 10 sessions
+
+**Combined:**
+- `search react sessions from last month` → Keyword + date filter
+- `find authentication AND api sessions` → Multiple tags
+
+## Important Notes
+
+- Show most recent sessions first by default
+- Limit initial results to 10, offer to show more with --all flag
+- If no matches found, suggest related searches or show recent sessions
+- Provide the session ID clearly so user can reload it
+- Display dates in human-readable format (e.g., "2 days ago", "last week")
+- If only one result found, offer to load it automatically
+
+## Example Output Formats
+
+**Multiple results:**
+```
+🔍 Found 5 sessions matching "authentication":
+
+1. [2026-01-20_1430] Setup OAuth2 Integration
+   📅 Jan 20, 14:30 (today) | 🏷️ oauth, authentication, api
+   💡 Integrated OAuth2 provider for third-party login...
+
+2. [2026-01-18_1600] Implement JWT Authentication
+   📅 Jan 18, 16:00 (2 days ago) | 🏷️ jwt, authentication, security
+   💡 Built JWT-based auth system with refresh tokens...
+
+Showing 2 of 5 results. Use "/search-sessions authentication --all" to see all.
+To reload: /reload-session <id>
+```
+
+**No results:**
+```
+🔍 No sessions found matching "xyz"
+
+Suggestions:
+- Try different keywords
+- Check spelling
+- Use broader search terms
+
+Recent sessions:
+1. [2026-01-20_1430] Implement Dark Mode Toggle Feature
+2. [2026-01-19_1015] Debug Memory Leak in React Component
+...
+```
+
+**Single result:**
+```
+🔍 Found 1 session matching "oauth":
+
+[2026-01-20_1430] Setup OAuth2 Integration
+📅 Jan 20, 14:30 (today) | 🏷️ oauth, authentication, api
+💡 Integrated OAuth2 provider for third-party login...
+
+Would you like to reload this session? (/reload-session 2026-01-20_1430)
+```