Add tools/validate.py; adding an asset without a clone

README.md

@@ -58,8 +58,23 @@ https://huggingface.co/datasets/SEA-AI/seashapes/resolve/<commit>/<id>/<id>.glb
 
 ## Adding an asset
 
-1. Put the file in `<id>/` and add its row to `metadata.jsonl`; `schema.json` must accept it.
-2. Render its preview from the dataset root: `uv run tools/preview.py <id>`. Every preview shows the front quarter from starboard, framed the same way.
+No clone needed: fetch the small files, add the asset, upload only what changed.
+
+```bash
+hf download SEA-AI/seashapes --repo-type dataset --local-dir seashapes --exclude "*.glb" --exclude "*.png"
+cd seashapes
+```
+
+1. Put the model at `<id>/<id>.glb` and append its row to `metadata.jsonl`. Leave `sha256` and `size_bytes` out; the check fills them in.
+2. Render its preview: `uv run tools/preview.py <id>`.
+3. Check every row: `uv run tools/validate.py`. Rows whose folder is here are checked against their files, the rest against `schema.json`.
+4. Upload in one commit:
+
+```bash
+hf upload SEA-AI/seashapes . . --repo-type dataset --include "<id>/*" --include metadata.jsonl --commit-message "Add <id>"
+```
+
+Pin the new commit, never `main`, wherever the asset is used.
 
 ## Licences
 

tools/validate.py

@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: Apache-2.0
+# /// script
+# requires-python = ">=3.11"
+# dependencies = ["jsonschema"]
+# ///
+"""Check every row of metadata.jsonl, filling in each file's size and SHA-256.
+
+    uv run tools/validate.py
+
+Run from the dataset root before an upload. A row whose folder is here is checked
+against its files; one whose folder was not downloaded, against the schema only.
+Exits non-zero, naming the rows that fail.
+"""
+
+import hashlib
+import json
+import sys
+from pathlib import Path
+
+from jsonschema import Draft202012Validator
+
+META = Path("metadata.jsonl")
+schema = Draft202012Validator(json.loads(Path("schema.json").read_text()))
+rows = [json.loads(line) for line in META.read_text().splitlines() if line.strip()]
+errors = []
+local = 0
+for row in rows:
+    asset = row.get("id", "?")
+    model, preview = Path(row.get("file", "")), Path(row.get("file_name", ""))
+    if model.parts[:1] != (asset,) or preview.parts[:1] != (asset,):
+        errors.append(f"{asset}: file and file_name must sit in the folder {asset}/")
+    if not Path(asset).is_dir():
+        errors += [f"{asset}: {e.message}" for e in schema.iter_errors(row)]
+        continue
+    local += 1
+    if model.is_file():
+        with model.open("rb") as f:
+            row["sha256"] = hashlib.file_digest(f, "sha256").hexdigest()
+        row["size_bytes"] = model.stat().st_size
+    else:
+        errors.append(f"{asset}: no file {model}")
+    if not preview.is_file():
+        errors.append(f"{asset}: no preview {preview}; run tools/preview.py {asset}")
+    errors += [f"{asset}: {e.message}" for e in schema.iter_errors(row)]
+ids = [row.get("id") for row in rows]
+errors += [f"{i}: id used twice" for i in sorted({i for i in ids if ids.count(i) > 1})]
+
+META.write_text("".join(json.dumps(row) + "\n" for row in rows))
+print(
+    "\n".join(errors) or f"{len(rows)} rows valid, {local} checked against their files"
+)
+sys.exit(bool(errors))