diff --git a/Makefile b/Makefile
index 477e6a2..fa93d6e 100644
--- a/Makefile
+++ b/Makefile
@@ -5,6 +5,23 @@ bin/tailwindcss:
 	curl -sLo bin/tailwindcss https://github.com/tailwindlabs/tailwindcss/releases/latest/download/tailwindcss-linux-x64
 	chmod +x bin/tailwindcss
 
+# Create seed files for SQLMesh staging models that require at least one landing file.
+# Run once after a fresh clone (data/ is gitignored so seeds are not in git).
+init-landing-seeds:
+	@python3 -c "
+import gzip, json, os, pathlib
+seed = {'date':'1970-01-01','captured_at_utc':'1970-01-01T00:00:00Z','venue_count':0,'venues_errored':0,'venues':[]}
+morning = pathlib.Path('data/landing/playtomic/1970/01/availability_1970-01-01.json.gz')
+recheck = pathlib.Path('data/landing/playtomic/1970/01/availability_1970-01-01_recheck_00.json.gz')
+morning.parent.mkdir(parents=True, exist_ok=True)
+for p in [morning, recheck]:
+    if not p.exists():
+        with gzip.open(p, 'wt') as f: json.dump(seed, f)
+        print('created', p)
+    else:
+        print('exists ', p)
+"
+
 css-build: bin/tailwindcss
 	$(TAILWIND) -i web/src/padelnomics/static/css/input.css -o web/src/padelnomics/static/css/output.css --minify