T07: Cargo workspace scaffold — cb-kernel/cb-events/cb-game-runtime/games-ground/cb-sim, HashMap deny-lint, scenario format + runner stub, Criterion skeleton, Makefile, CI

Makefile

@@ -0,0 +1,35 @@
+# One command surface (InnerLoop §agentic-efficiency #3). Deterministic,
+# greppable output; precursor of the `cb` CLI.
+
+CARGO := cargo
+
+.PHONY: check test sim bench deps loc all
+
+## fmt + clippy (deny warnings) + HashMap deny-lint
+check:
+	$(CARGO) fmt --all --check
+	$(CARGO) clippy --workspace --all-targets -- -D warnings
+
+## unit + scenario-format tests
+test:
+	$(CARGO) test --workspace
+
+## run all GROUND scenarios through cb-sim
+sim:
+	$(CARGO) run -q -p cb-sim -- scenarios/ground/*.yaml
+
+## Criterion benches (AM-6/AM-7 wiring)
+bench:
+	$(CARGO) bench -p games-ground
+
+## AM-4: transitive crate count (excludes dev/build deps)
+deps:
+	@$(CARGO) tree --workspace -e normal --prefix none | sed 's/ (\*)//' | sort -u | grep -vE '^(cb-|games-|cb_|$$)' | tee /dev/stderr | wc -l
+
+## AM-2/AM-3 input: source LOC per crate (excludes tests would need tokei)
+loc:
+	@for d in crates/cb-kernel crates/cb-events crates/cb-game-runtime games/ground tools/cb-sim; do \
+		printf '%-28s %s\n' $$d "$$(find $$d/src -name '*.rs' | xargs cat | grep -vcE '^\s*(//|$$)')"; \
+	done
+
+all: check test sim