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>

.claude/hooks/pre-commit-tdd.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+# Pre-commit hook to enforce TDD compliance
+# Verifies that test files are modified alongside production code
+
+set -e
+
+# Get staged files
+STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM)
+
+# Separate test and production files
+TEST_FILES=""
+PROD_FILES=""
+
+for file in $STAGED_FILES; do
+    case "$file" in
+        *test*.py|*_test.py|*tests/*.py)
+            TEST_FILES="$TEST_FILES $file"
+            ;;
+        *.test.ts|*.test.tsx|*.spec.ts|*.spec.tsx|*/__tests__/*)
+            TEST_FILES="$TEST_FILES $file"
+            ;;
+        *_test.rs|*/tests/*.rs)
+            TEST_FILES="$TEST_FILES $file"
+            ;;
+        *.py|*.ts|*.tsx|*.js|*.jsx|*.rs)
+            # Skip __init__.py, conftest.py, config files
+            case "$file" in
+                *__init__.py|*conftest.py|*config*.py|*.config.ts|*.config.js)
+                    ;;
+                *)
+                    PROD_FILES="$PROD_FILES $file"
+                    ;;
+            esac
+            ;;
+    esac
+done
+
+# Check if we have production files without test files
+if [ -n "$PROD_FILES" ] && [ -z "$TEST_FILES" ]; then
+    echo "TDD VIOLATION: Production code changed without test changes"
+    echo ""
+    echo "Production files modified:"
+    for file in $PROD_FILES; do
+        echo "  - $file"
+    done
+    echo ""
+    echo "Please ensure you're following TDD:"
+    echo "  1. Write a failing test first (RED)"
+    echo "  2. Write minimum code to pass (GREEN)"
+    echo "  3. Refactor if needed (REFACTOR)"
+    echo ""
+    echo "If this is a legitimate exception (config, types, etc.), use:"
+    echo "  git commit --no-verify"
+    exit 1
+fi
+
+exit 0