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diff --git a/Makefile b/Makefile
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index 0000000..2eeccc6
--- /dev/null
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+# Development tasks. Everything runs through the `go` tool, so there is
+# nothing to install first.
+#
+#   make            list the targets
+#   make test       run the suite
+#   make lint       gofmt check + go vet, no files touched
+#   make build      compile the binary into bin/
+GO ?= go
+BINARY ?= bin/cepis-telegram
+IMAGE ?= cepis-telegram:dev
+
+.DEFAULT_GOAL := help
+.PHONY: help test test-race lint format build image check clean
+
+help:
+	@echo 'Targets:'
+	@echo '  test       run the test suite'
+	@echo '  test-race  run it under the race detector'
+	@echo '  lint       gofmt -l + go vet (read-only)'
+	@echo '  format     apply gofmt (writes)'
+	@echo '  build      compile the binary into $(BINARY)'
+	@echo '  image      build the container image as $(IMAGE)'
+	@echo '  check      lint + test + build, in that order'
+	@echo '  clean      remove build and test artefacts'
+
+test:
+	$(GO) test ./...
+
+test-race:
+	$(GO) test -race -count=1 ./...
+
+# Read-only by design, so it is safe in CI and in a pre-commit hook: it reports
+# what `make format` would change without changing anything.
+lint:
+	@files=$$(gofmt -l .); \
+	if [ -n "$$files" ]; then \
+		echo 'gofmt would rewrite:'; echo "$$files"; exit 1; \
+	fi
+	$(GO) vet ./...
+
+format:
+	gofmt -w .
+
+build:
+	CGO_ENABLED=0 $(GO) build -trimpath -ldflags '-s -w' -o $(BINARY) .
+
+image:
+	docker build -t $(IMAGE) .
+
+# The order matters: lint is the fastest to fail, so a broken run reports the
+# cheapest problem first.
+check: lint test build
+
+clean:
+	$(GO) clean -testcache
+	rm -rf bin