feat(makefile): add mirror-public target for github scrub workflow (#78)

Co-authored-by: Michael Czechowski <mail@dailysh.it>
Co-committed-by: Michael Czechowski <mail@dailysh.it>

Author: nextlevelshit

Makefile

@@ -1,10 +1,13 @@
 # Code Crispies - Interactive CSS Learning Platform
 
-.PHONY: help dev build test test-watch test-coverage format clean install deploy
+.PHONY: help dev build test test-watch test-coverage format clean install deploy mirror-public
 
 # Default port
 PORT = 1234
 
+# Files stripped from github public mirror (libretech-internal)
+SCRUB_PATHS := .wave .gitea DEPLOY.md LESSON_EVALUATION.md compose.yaml Dockerfile .dockerignore supabase-setup.sql flake.nix flake.lock Makefile wave.yaml specs CLAUDE.md .claude
+
 help:
 	@echo "Code Crispies - Development Commands"
 	@echo ""
@@ -21,6 +24,9 @@ help:
 	@echo "  make format       - Format all source files"
 	@echo "  make clean        - Remove build artifacts"
 	@echo "  make install      - Install dependencies"
+	@echo ""
+	@echo "Publishing:"
+	@echo "  make mirror-public - Strip internal files + force-push to github mirror"
 
 # Development
 dev:
@@ -52,3 +58,27 @@ clean:
 # Install
 install:
 	npm install
+
+# Mirror to public github with internal files stripped.
+# Run after merging to main on gitea (libretech/cc).
+# Force-pushes to github.com/nextlevelshit/code-crispies main.
+mirror-public:
+	@if [ -n "$$(git status --porcelain)" ]; then \
+		echo "ERROR: working tree not clean. Commit or stash first."; exit 1; \
+	fi
+	@current=$$(git symbolic-ref --short HEAD); \
+	if [ "$$current" != "main" ]; then \
+		echo "ERROR: must be on main (current: $$current)"; exit 1; \
+	fi
+	git fetch origin main
+	@if [ "$$(git rev-parse HEAD)" != "$$(git rev-parse origin/main)" ]; then \
+		echo "ERROR: local main not in sync with origin/main"; exit 1; \
+	fi
+	git switch -c public-mirror main
+	git rm -rf $(SCRUB_PATHS)
+	git commit -m "scrub: strip internal infra for public mirror"
+	git push --force github public-mirror:main
+	git switch main
+	git branch -D public-mirror
+	@echo ""
+	@echo "✓ pushed scrubbed tree to github.com/nextlevelshit/code-crispies main"