_manifesttriomphe.ymf -

: After creating or editing a map ( .ymap ), the developer clicks "Generate" in the Manifest Generator. The tool scans all entities in the project and creates the _manifest.ymf file automatically.

: It acts as a set of instructions for the game to pre-load specific models or interior assets before the player arrives at that location in the world. _manifesttriomphe.ymf

Are you trying to with a specific mod, or are you looking to create your own manifest using CodeWalker? : After creating or editing a map (