uefn-assets-data

Sources: Claude/docs/mcp/assets.md, entry B2 of SKILLS-PROPOSAL.md, recipes.json. Cross-cutting skills to always follow: uefn-mcp-lab-guard e uefn-create-use-remove-one-script (create, use, remove in ONE script).

Rules

• Paths always in GUID form: {lab} = /<guid>/<progetto> (e.g. /09e4e8d3-.../root_ai_lab). Never /root_ai_lab/....
• AssetTools: package path (without .Name); DataTable/CurveTable: {"refPath":"<pkg>.<Name>"}; diff: plain strings.
• The guard is not bypassed: a refusal is reported. If a recipe fails: exact error and STOP.
• add_rows, set_rows, remove_rows return null: re-read (get_rows/list_rows) to confirm.
• find_assets always with a filter (folder_path, name, asset_type): without arguments ~120 MB.

Verified recipes

Toolset: editor_toolset.toolsets.asset.AssetTools, editor_toolset.toolsets.data_table.DataTableTools, editor_toolset.toolsets.curve_table.CurveTableTools. Assets:

1. create_folder {"path":"{lab}/Assets_X"}
2. find_assets {"folder_path":"{lab}/Assets_X","asset_type":{"refPath":"/Script/Engine.DataTable"},"recursive":true}
3. exists {"path":..}, get_asset_class {"asset_path":..}, get_asset_tags, is_dirty, get_dependencies, get_referencers, load_asset, reload_asset (discards unsaved changes), list_folders {"root_path":..,"recursive":false}
4. duplicate {"path":..,"new_path":..} (false if it exists), move {"path":..,"new_path":..}, delete {"path":..} (folder included)
5. save_assets {"asset_paths":["{lab}/Assets_X/DT_X"]}
6. update_metadata_tags {"asset_path":..,"set_tags":{"MyTag":"v1"}} poi get_metadata_tags (metadata is NOT the registry tags of the tags filter).

DataTable: 7. search_row_structs {"struct_name":"*Table*"}; create {"folder_path":"{lab}/Assets_X","asset_name":"DT_X","schema":{"refPath":"/Script/GameplayTags.GameplayTagTableRow"}} -> refPath {dt} 8. get_schema, add_rows {"data_table":{"refPath":"{dt}"},"row_names":["RowA","RowB"]}, set_rows {..,"values":"{\"RowA\":{\"devComment\":\"hello\"}}"} (JSON TEXT, existing row), get_rows {..,"row_names":["RowA"]}, list_rows, rename_rows {..,"renames":{"RowA":"RowAA"}}, remove_rows, diff {"old_asset_path":..,"new_asset_path":..}

CurveTable: 9. create {"folder_path":..,"asset_name":"CT_X"} (already has a Curve row); add_row {"curve_table":{"refPath":"{ct}"},"row_name":"Speed","default_value":1.0}; set_keys {..,"keys":[{"time":0,"value":0},{"time":1,"value":10}]}; add_key {..,"key":{"time":5.0,"value":9.0}}; get_keys, list_rows, rename_row {..,"row_name":"Speed","new_row_name":"Velocity"}, remove_row, diff.

Cleanup: AssetTools/delete {path:"{lab}/Assets_X"}.

To try (not verified)

• DataTableTools/import_file, CurveTableTools/import_file: guard-refused (disk path). Do not bypass.
• AssetTools/update_metadata_tags con remove_tags: rejected (3 attempts); no known way to remove a tag except deleting the asset.
• AssetTools/exists right after delete: unreliable as proof of deletion (unverified).
• find_assets without filters, ListTags: deliberately not run (120 MB / 2.8 MB).

Don't

find_assets without filters; import from disk; treating null as success; writing outside the lab folder.