fix: make command reconciliation binary safe

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

Makefile

@@ -1,18 +1,22 @@
-.PHONY: install uninstall test check
+.DEFAULT_GOAL := help
+.PHONY: help install uninstall test check
 
-install:
+help: ## List available targets
+	@awk 'BEGIN {FS = ":.*## "} /^[a-zA-Z0-9_-]+:.*## / {printf "  %-12s %s\n", $$1, $$2}' $(MAKEFILE_LIST)
+
+install: ## Install or refresh tamq as a user-level uv tool
 	@command -v uv >/dev/null || { echo "tamq: uv is required; install it from https://docs.astral.sh/uv/" >&2; exit 1; }
 	uv tool install --force --reinstall --refresh .
 	@command -v tamq >/dev/null || { echo "tamq: installed, but the uv tool bin directory is not on PATH; run 'uv tool update-shell'" >&2; exit 1; }
 	tamq --version
 
-uninstall:
+uninstall: ## Uninstall the user-level tamq tool
 	uv tool uninstall tmux-amq
 
-test:
+test: ## Run the test suite
 	uv run pytest
 
-check:
+check: ## Run tests and repository consistency checks
 	uv run pytest
 	git diff --check
 	python3 -m compileall -q src