Add Makefile for validate, build, and zip automation

Targets:
- make all/release: validate, build, and create zip packages
- make validate: validate rule files via pnpm
- make build: build skill files
- make zip: create zip packages for all skills
- make clean: remove generated files

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

Makefile

@@ -0,0 +1,67 @@
+# Makefile for agent-skills
+# Automates validation, building, and packaging of skills
+
+.PHONY: all validate build zip clean install help
+
+# Default target
+all: validate build zip
+
+# Install dependencies
+install:
+	@echo "Installing dependencies..."
+	cd packages/code-security-build && pnpm install
+
+# Validate all rule files
+validate:
+	@echo "Validating rule files..."
+	cd packages/code-security-build && pnpm validate
+
+# Build the skill (runs build-agents and extract-tests)
+build:
+	@echo "Building skills..."
+	cd packages/code-security-build && pnpm build
+
+# Create zip files for all skills
+zip:
+	@echo "Creating zip packages for all skills..."
+	@for skill_dir in skills/*/; do \
+		skill_name=$$(basename "$$skill_dir"); \
+		if [ -f "$$skill_dir/SKILL.md" ]; then \
+			echo "  Packaging $$skill_name..."; \
+			cd skills && rm -f "$$skill_name.zip" && zip -rq "$$skill_name.zip" "$$skill_name/" && cd ..; \
+			echo "  Created skills/$$skill_name.zip"; \
+		else \
+			echo "  Skipping $$skill_name (no SKILL.md)"; \
+		fi \
+	done
+	@echo "Done!"
+
+# Clean generated files
+clean:
+	@echo "Cleaning generated files..."
+	rm -f skills/*.zip
+	@echo "Done!"
+
+# Development workflow: validate and build
+dev: validate build
+
+# Full release workflow: validate, build, and package
+release: validate build zip
+	@echo ""
+	@echo "Release complete! Zip files created:"
+	@ls -la skills/*.zip 2>/dev/null || echo "  No zip files found"
+
+# Show help
+help:
+	@echo "Usage: make [target]"
+	@echo ""
+	@echo "Targets:"
+	@echo "  all       - Validate, build, and create zip packages (default)"
+	@echo "  install   - Install pnpm dependencies"
+	@echo "  validate  - Validate all rule files"
+	@echo "  build     - Build the skill files"
+	@echo "  zip       - Create zip packages for all skills"
+	@echo "  clean     - Remove generated zip files"
+	@echo "  dev       - Validate and build (no zip)"
+	@echo "  release   - Full release: validate, build, and zip"
+	@echo "  help      - Show this help message"