Release v1.7.0: Add repomix-safe-mixer skill

Add new security-focused skill for safely packaging codebases with repomix
by automatically detecting and removing hardcoded credentials.

New skill: repomix-safe-mixer
- Detects 20+ credential patterns (AWS, Supabase, Stripe, OpenAI, etc.)
- Scan → Report → Pack workflow with automatic blocking
- Standalone security scanner for pre-commit hooks
- Environment variable replacement guidance
- JSON output for CI/CD integration

Also updates:
- skill-creator: Simplified path resolution best practices
- marketplace.json: Version 1.7.0, added repomix-safe-mixer plugin
- README.md: Updated to 14 skills, added repomix-safe-mixer documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

skill-creator/SKILL.md

@@ -81,9 +81,10 @@ Files not intended to be loaded into context, but rather used within the output
 - **Forbidden**: Absolute paths to user directories (`/home/username/`, `/Users/username/`, `/mnt/c/Users/username/`)
 - **Forbidden**: Personal usernames, company names, department names, product names
 - **Forbidden**: OneDrive paths, cloud storage paths, or any environment-specific absolute paths
+- **Forbidden**: Hardcoded skill installation paths like `~/.claude/skills/` or `/Users/username/Workspace/claude-code-skills/`
 - **Allowed**: Relative paths within the skill bundle (`scripts/example.py`, `references/guide.md`)
 - **Allowed**: Standard placeholders (`~/workspace/project`, `username`, `your-company`)
-- **Best practice**: Use generic examples and placeholders; all paths should reference bundled skill files or use standard environment-agnostic patterns
+- **Best practice**: Reference bundled scripts using simple relative paths like `scripts/script_name.py` - Claude will resolve the actual location
 
 ##### Versioning