Lot 51 Releases Core Library 1.40.1, Supports The Sims 4 1.121.361

Lot 51 has published an updated build of Core Library, labeled lot51_core_v1.40.1, with the file listed as published March 3, 2026 on CurseForge; Lot51’s site also states, "Core Library has been updated recently to support TS4 1.121.361." This release follows a steady cadence through 2025 and early 2026 and positions the library as a current dependency for creators targeting the latest base game patch.

Core Library, described on Lot51’s product page as "Base Game Compatible," serves as a shared toolkit for mods and creators. The site copy reads, "Core Library is a dependancy for many mods to add gameplay functionality without overriding each other. It helps reduce conflicts and the need for redundant scripts," and promises that "Core Library includes reusable snippets to perform common tuning injections and add other functionality to your tuning only mods without the need for you to script." The page also carries the tagline, "Supercharge your own creations with scripting capabilties, without the scripting."

Lot51’s public changelog excerpts show a recent string of targeted fixes and injector additions leading into 2026. Version 1.39 is listed as updated February 16, 2026 on the site. Earlier entries document concrete injector work: 1.37, updated October 30, 2025, "Fixed backwards compatibility with game version <= 1.116 that regressed in Core version 1.36," added an "inject_to_skills" injector to add loot, super affordances, and actor mixers to a Skill's level data, and allowed creators to "add `custom_tooltips` to existing tooltip_components in object injectors with `tooltip_component` instead of `tooltip_component_override`." Version 1.36, updated October 7, 2025, fixed "`exclude_tags` in `inject_by_object_tags` not filtering properly," and added "club_tuning" and "custom_schedule_tuning" injectors. Version 1.35, updated September 18, 2025, "Fixed compatibility with Pre-Adventure Awaits patch (1.118)."

The published CurseForge date, March 3, 2026, aligns with the description that this is an early-March release, but the provided Lot51 site excerpts included here stop at the 1.39 header from February 16, 2026 and do not include a 1.40.1 changelog entry in the pasted material. The supplied site text also contains recurring notes about documentation timing, for example, "TDESC will be updated shortly" and "TDESCs will be updated soon," suggesting creators can expect accompanying tuning-descriptor updates to follow releases.

Notably, claims present in the supplied headline about a reroll adding a PlumBuddy manifest and a fix for FlagStatInteraction do not appear in the supplied Lot51 site excerpts or the pasted changelog snippets. The confirmed details here are the file name lot51_core_v1.40.1, the CurseForge publish date of March 3, 2026, and the site statement that the Core Library supports TS4 1.121.361; the exact 1.40.1 changelog text and any mention of PlumBuddy or FlagStatInteraction were not included in the provided materials. Confirming the full 1.40.1 changelog on CurseForge or Lot51’s changelog page will clarify those specific items and any additional injector or compatibility notes.