chore: initial import from KNEL/PFVCluster@041d311 [#769]

Split per O&M lane work order. Full history: KNEL/PFVCluster.
shellcheck debt fixed in librenms-agent (quoting, arithmetic, backticks);
fixes upstream ntp-server.sh bug: input_wakeups reported PACKETSENDFAILURES
instead of INPUTWAKEUPS. mysql.sh (PHP-in-.sh) exempt per house rule.

https://projects.knownelement.com/issues/769#note-4152

Makefile

@@ -0,0 +1,50 @@
+# Makefile — convenience dispatch to scripts/.
+#
+# Not required. The scripts in scripts/ are the real entry points and work
+# standalone. This file just gives you short verbs if you're at a terminal.
+#
+# In Mode 2 (Hermes/OWUI/MCP), agents call the scripts directly or via API —
+# they don't need this file.
+
+# Project-specific overrides for check-rules.sh
+export PROJECT_DOC_EXEMPT ?= AGENTS.md STATUS.md WORKING.md README.md ADOPTING.md LICENSE .env.example questions-v1.md BASELINE-PROMPT.md PATTERNS.md
+export PROJECT_DISCOURSE_HOST ?= community.turnsys.com
+
+.PHONY: setup validate fast lint test garden up down status clean help
+
+help: ## Show available targets
+	@grep -E '^[a-zA-Z_-]+:.*?## ' $(MAKEFILE_LIST) | awk 'BEGIN{FS=":.*?## "}{printf "  \033[36m%-12s\033[0m %s\n", $$1, $$2}'
+
+setup: ## Install git hooks
+	@bash scripts/setup-hooks.sh
+
+validate: ## Full rule audit (includes tests)
+	@bash scripts/check-rules.sh
+
+fast: ## Fast rule audit (pre-commit equivalent)
+	@bash scripts/check-rules.sh --fast
+
+lint: ## Lint shell scripts (shellcheck via docker)
+	@docker run --rm -v "$$(pwd):/mnt" koalaman/shellcheck:stable \
+		$$(find . -path ./.git -prune -o -path ./.tmp -prune -o -path ./vendor -prune -o -path ./node_modules -prune -o \( -name '*.sh' -o -name '*.bash' \) -print | sed 's|^\./|/mnt/|') || true
+
+test: ## Run the test suite (override per project)
+	@bash scripts/test.sh
+
+garden: ## Doc-sprawl / Discourse-migration report
+	@bash scripts/garden.sh
+
+up: ## Bring up the docker-compose stack
+	@bash scripts/up.sh
+
+down: ## Bring down the docker-compose stack
+	@bash scripts/down.sh
+
+status: ## Show repo status snapshot
+	@echo "== branch =="; git branch --show-current 2>/dev/null || echo "(no branch)"
+	@echo "== last commit =="; git log --oneline -1 2>/dev/null || true
+	@echo "== working tree =="; git status --short 2>/dev/null || echo "(not a git repo)"
+	@echo "== STATUS.md head =="; sed -n '1,12p' STATUS.md 2>/dev/null || echo "(no STATUS.md)"
+
+clean: ## Remove build/test artifacts (override per project)
+	@echo "make clean: nothing to clean — override this in your project's Makefile."