diff --git a/Makefile b/Makefile
index 283e833..873dd8b 100644
--- a/Makefile
+++ b/Makefile
@@ -938,23 +938,29 @@ cold-pack-all: bootstrap ## parallel cold-pack, RAM-aware (override with COLD_PA
 	@echo ">> all shards packed; final bucket state:"
 	@$(ARBORIST) cold stats
 
-cold-hydrate: bootstrap ## genesis a fresh peer from cloud, M-aware: pull every metadata pack from bucket in parallel and route into HYDRATE_DIR/00N.db × HYDRATE_M
+cold-hydrate: bootstrap ## genesis a fresh peer from cloud, M-aware: pull every metadata pack and route into HYDRATE_DIR/00N.db × HYDRATE_M.  HYDRATE_MODE=full (default) | just-enough
 	@if [ -z "$(HYDRATE_DIR)" ]; then echo "HYDRATE_DIR=<dir> required"; exit 2; fi
 	@if [ -z "$(HYDRATE_M)" ]; then echo "HYDRATE_M=<int> required (matches #000065 canonical M)"; exit 2; fi
 	@mkdir -p $(HYDRATE_DIR)
-	@$(COLD_PACK_PICK_JOBS); \
+	@MODE="$${HYDRATE_MODE:-full}"; \
+	case "$$MODE" in \
+	  full)        MODE_FLAG="--full" ;; \
+	  just-enough) MODE_FLAG="--just-enough" ;; \
+	  *)           echo "HYDRATE_MODE=$$MODE invalid (full | just-enough)"; exit 2 ;; \
+	esac; \
+	$(COLD_PACK_PICK_JOBS); \
 	echo ">> discovering metadata packs in bucket"; \
 	hashes=$$($(ARBORIST) cold list --no-manifest \
 	    | $(VENV)/bin/python -c \
 	    "import sys, json; d=json.load(sys.stdin); print(' '.join(p['pack_hash'] for p in d['packs'] if p['kind']=='metadata'))"); \
 	if [ -z "$$hashes" ]; then echo "no metadata packs in bucket"; exit 3; fi; \
-	echo ">> $$JOBS-way parallel pull of metadata packs (M=$(HYDRATE_M))"; \
+	echo ">> $$JOBS-way parallel pull of metadata packs (M=$(HYDRATE_M), mode=$$MODE)"; \
 	printf "%s\n" $$hashes | \
 	    xargs -n 1 -P $$JOBS -I {} \
 	    $(ARBORIST) cold unpack {} \
 	      --hydrate-shards-dir $(HYDRATE_DIR) \
 	      --hydrate-M $(HYDRATE_M) \
-	      --full
+	      $$MODE_FLAG
 	@echo ">> hydration complete:"
 	@ls -lh $(HYDRATE_DIR)/*.db 2>/dev/null