feat: initial Claude Code configuration scaffold

Comprehensive Claude Code guidance system with:

- 5 agents: tdd-guardian, code-reviewer, security-scanner, refactor-scan, dependency-audit
- 18 skills covering languages (Python, TypeScript, Rust, Go, Java, C#),
  infrastructure (AWS, Azure, GCP, Terraform, Ansible, Docker/K8s, Database, CI/CD),
  testing (TDD, UI, Browser), and patterns (Monorepo, API Design, Observability)
- 3 hooks: secret detection, auto-formatting, TDD git pre-commit
- Strict TDD enforcement with 80%+ coverage requirements
- Multi-model strategy: Opus for planning, Sonnet for execution (opusplan)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -0,0 +1,72 @@
+# AI Development Scaffold
+
+A comprehensive Claude Code configuration for professional software development with strict TDD enforcement, multi-language support, and cloud infrastructure patterns.
+
+## What's Included
+
+- **TDD Enforcement** - Strict RED-GREEN-REFACTOR workflow with 80%+ coverage requirements
+- **Multi-Language Support** - Python, TypeScript, Rust, Go, Java, C#
+- **Cloud Patterns** - AWS, Azure, GCP infrastructure templates
+- **IaC** - Terraform and Ansible best practices
+- **Testing** - Unit, UI, and browser testing patterns (Playwright + Chrome MCP)
+- **Security** - Automatic secret detection and blocking
+- **Model Strategy** - Opus for planning, Sonnet for execution (`opusplan`)
+
+## Quick Start
+
+```bash
+# 1. Clone this repo
+git clone https://github.com/yourusername/ai-development-scaffold.git
+
+# 2. Backup existing Claude config (if any)
+mv ~/.claude ~/.claude.backup
+
+# 3. Deploy
+cp -r ai-development-scaffold/.claude/* ~/.claude/
+chmod +x ~/.claude/hooks/*.sh
+
+# 4. Verify
+ls ~/.claude/
+# Should show: CLAUDE.md, settings.json, agents/, skills/, hooks/
+```
+
+## Documentation
+
+See [.claude/README.md](.claude/README.md) for:
+- Complete file structure
+- Hook configuration (Claude hooks vs git hooks)
+- Usage examples
+- Customization options
+- Troubleshooting
+
+## Agents Available
+
+| Agent | Purpose |
+|-------|---------|
+| `@tdd-guardian` | TDD enforcement and guidance |
+| `@code-reviewer` | Comprehensive PR review (uses Opus) |
+| `@security-scanner` | Vulnerability and secrets detection |
+| `@refactor-scan` | Refactoring assessment (TDD step 3) |
+| `@dependency-audit` | Outdated/vulnerable package checks |
+
+## Skills Available
+
+| Category | Skills |
+|----------|--------|
+| Languages | Python, TypeScript, Rust, Go, Java, C# |
+| Infrastructure | AWS, Azure, GCP, Terraform, Ansible, Docker/K8s, Database, CI/CD |
+| Testing | TDD, UI Testing, Browser Testing |
+| Patterns | Monorepo, API Design, Observability |
+
+## Coverage Targets
+
+| Layer | Target |
+|-------|--------|
+| Domain/Business Logic | 90%+ |
+| API Routes | 80%+ |
+| Infrastructure/DB | 70%+ |
+| UI Components | 80%+ |
+
+## License
+
+MIT