It seems you're looking for a high-quality download or source for Sun Haven version v1.51 (often written as v151).
Unlike v1.4, where mod conflicts would crash the game on startup, v1.5.1 includes a verbose error logging system that tells you exactly which .json file is broken. This stability is crucial for players who consider modded Sun Haven the definitive experience.
Notably, Sun Haven removed the tiered quality system for crops and forageables in earlier patches to reduce inventory clutter, so "high quality" in the current version (v1.5.1) refers to item rarity tiers and buffed craftables rather than star-ratings for individual items. Key v1.5 High-Quality Updates sun haven v151 high quality
Stability: Continued work on multiplayer stability to prevent crashes and item loss.
: Tools for early-stage players received speed buffs, and starting maximum mana was doubled from 10 to 20 to allow more spell usage early on Quality of Life & Balance It seems you're looking for a high-quality download
Abstract
Progression-Based: Locations are unlocked naturally as you progress through their respective main story questlines. Notably, Sun Haven removed the tiered quality system
Tool Buffs: Most early-game tools received speed increases, and the Copper Watering Can's capacity was buffed.