feat(foundation): create directory structure and standards library
- Create root-level directories: agents/, commands/, standards/, templates/
- Port 5 core standards from global Claude standards
- Adapt standards for claude-skills context (cs-* prefix, Python tools, skills)
- Create sprint planning documents (context.md, plan.md)
- All directories tracked with .gitkeep files
Standards created:
- communication-standards.md (absolute honesty, zero fluff, pragmatic focus)
- quality-standards.md (Python tool quality, agent workflows, testing)
- git-workflow-standards.md (conventional commits, semantic versioning)
- documentation-standards.md (Markdown standards, living docs, templates)
- security-standards.md (secret detection, dependency security, input validation)
Sprint plan ready for Days 1-6 implementation.
Phase: 1 (Foundation)
Issues: #8, #9
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