diff --git a/Makefile b/Makefile
index c362996..360a7dd 100644
--- a/Makefile
+++ b/Makefile
@@ -32,10 +32,44 @@ help:
 	@echo "Available targets:"
 	@grep -hE '^[a-zA-Z0-9_-]+:' $(MAKEFILE_LIST) | cut -d: -f1 | sed 's/^/  /'
 
+# Frontend sources whose changes must trigger a rebuild. `backend/static/index.html`
+# doubles as the build stamp, so a clean clone or `make clean` (which empties
+# backend/static) forces the next build to regenerate.
+FRONTEND_OUT := backend/static/index.html
+
+# `npm ci` is only needed when the manifest/lockfile change.
+FRONTEND_DEPS_STAMP := frontend/node_modules/.install-stamp
+
+# Build the SvelteKit bundle and copy it into backend/static (embedded via
+# go:embed). Incremental: recompile only when frontend sources are newer than the
+# embedded bundle. Paths are checked from the recipe (not as make prerequisites)
+# because SvelteKit route names like `(app)` break make's filename parsing.
 frontend:
-	cd frontend && npm ci && npm run build
-	rm -rf backend/static/*
-	cp -r frontend/build/* backend/static/
+	@set -e; \
+	if [ ! -f $(FRONTEND_DEPS_STAMP) ] \
+		|| [ frontend/package.json -nt $(FRONTEND_DEPS_STAMP) ] \
+		|| [ frontend/package-lock.json -nt $(FRONTEND_DEPS_STAMP) ]; then \
+		echo '> cd frontend && npm ci'; \
+		cd frontend && npm ci; \
+		touch node_modules/.install-stamp; \
+		cd ..; \
+	fi; \
+	if [ ! -f $(FRONTEND_OUT) ] \
+		|| [ -n "$$(find frontend/src frontend/static -newer $(FRONTEND_OUT) -print -quit)" ] \
+		|| [ frontend/package.json -nt $(FRONTEND_OUT) ] \
+		|| [ frontend/package-lock.json -nt $(FRONTEND_OUT) ] \
+		|| [ frontend/svelte.config.js -nt $(FRONTEND_OUT) ] \
+		|| [ frontend/vite.config.ts -nt $(FRONTEND_OUT) ] \
+		|| [ frontend/tailwind.config.ts -nt $(FRONTEND_OUT) ] \
+		|| [ frontend/tsconfig.json -nt $(FRONTEND_OUT) ]; then \
+		echo '> cd frontend && npm run build'; \
+		cd frontend && npm run build; \
+		cd ..; \
+		rm -rf backend/static/*; \
+		cp -r frontend/build/* backend/static/; \
+	else \
+		echo 'frontend: up to date'; \
+	fi
 
 backend:
 	mkdir -p bin
@@ -87,7 +121,7 @@ build-release: frontend
 	cp bin/galo bin/galo-$(VERSION)
 	@echo "release: bin/galo-$(VERSION)"
 
-run: backend
+run: frontend backend
 	./bin/galo
 
 migrate:
diff --git a/README.md b/README.md
index 060616c..5ef8d4b 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ make build      # frontend -> backend/static -> go:embed -> bin/galo
 Отдельные шаги:
 
 ```bash
-make frontend   # npm ci && npm run build, копирует статику в backend/static
+make frontend   # npm run build, копирует статику в backend/static (инкрементально)
 make backend    # CGO_ENABLED=0 go build -tags nodynamic -o bin/galo
 ```
 
@@ -133,6 +133,10 @@ make backend    # CGO_ENABLED=0 go build -tags nodynamic -o bin/galo
 > транспилированный в Go libwebp вместо динамической загрузки через purego,
 > благодаря чему бинарник остаётся полностью статическим.
 
+`make frontend` собирает только при изменении исходников `frontend/`; `npm ci`
+запускается лишь когда менялись `package.json`/`package-lock.json`. `make run`
+и `make build` учитывают это и не пересобирают неизменившийся фронтенд.
+
 Проверка:
 
 ```bash
@@ -151,7 +155,7 @@ make migrate    # go run ./cmd/migrate — применяет up-миграци
 ## Локальный запуск
 
 ```bash
-make run        # соберёт backend и запустит ./bin/galo
+make run        # доберёт изменившийся фронтенд, соберёт backend и запустит ./bin/galo
 # или напрямую:
 ./bin/galo
 ```