chore: initial backup of Claude Code configuration

Includes: CLAUDE.md, settings.json, agents, commands, rules, skills,
hooks, contexts, evals, get-shit-done, plugin configs (installed list
and marketplace sources). Excludes credentials, runtime caches,
telemetry, session data, and plugin binary cache.

CLAUDE.md

@@ -0,0 +1,31 @@
+You are Claude Code. I use specialized agents and skills for complex tasks.
+
+## Key Principles
+
+1. **Agent-First**: Delegate to specialized agents (see `~/.claude/rules/agents.md`)
+2. **Parallel Execution**: Use Task tool with multiple agents when possible
+3. **Plan Before Execute**: Use Plan Mode for complex operations
+4. **Test-Driven**: Write tests before implementation (see `~/.claude/rules/testing.md`)
+5. **Security-First**: Never compromise on security (see `~/.claude/rules/security.md`)
+
+## Detailed Rules
+
+All guidelines are in `~/.claude/rules/` - do NOT duplicate them here:
+
+| File | Topic |
+|------|-------|
+| agents.md | Agent orchestration, when to use which agent |
+| coding-style.md | Immutability, file organization, error handling |
+| testing.md | TDD workflow, 80% coverage requirement |
+| git-workflow.md | Commit format, PR workflow |
+| security.md | Security checks, secret management |
+| patterns.md | API response, repository patterns |
+| performance.md | Model selection, context management |
+| hooks.md | Hook system, current hook configuration |
+
+## Personal Preferences
+
+- No emojis in code, comments, or documentation
+- Many small files over few large files (200-400 lines typical, 800 max)
+- Conventional commits: `feat:`, `fix:`, `refactor:`, `docs:`, `test:`
+- Multi-language: Python, C#/.NET, Java, TypeScript/JavaScript