- Save schema 33 omits standard item amounts and stores only an optional non-standard block base plus per-item differences.
- Relationship targets are sorted and delta-encoded within each Tarinai row.
- World seeds use a canonical 64-bit hexadecimal identity and occupy exactly 8 bytes in the binary save.
- The binary header contains one schema byte; its high bit signals whether a string table follows. Empty string tables and the duplicate snapshot version are omitted.
- Deflate state is folded into the low bit of the frame-length varuint, eliminating the separate compression byte.
- 15-bit text conversion uses arithmetic Unicode range mapping instead of a 32768-character string and reverse Map.
- Previous binary schemas are intentionally unsupported.
- Load confirmation uses the in-game dialog; fan wind is realtime; zunchi tool preview opacity, carried plushie depth, and blanket grass rules were corrected.
- v39.16.16: link rendering no longer depends on midpoint spatial visibility; bounce fences launch Tarinai without shock damage; passive springs are more under-damped and elastic.
- v39.16.16: population chart includes per-bucket births/deaths; rotators accept signed motor speed; champion personality bonuses inherit through descendants; champion-pair mate weighting is moderately reduced.
- v39.16.16: colony population chart records births/deaths, rotators accept negative motor speed, champion personality boosts inherit through descendants, champion-pair mating is slightly reduced, and one-way fence previews/pathfinding honor the passable direction.
- v39.16.19: added direct food/medicine giving by placement or pinched drop, with a give overlay, stronger food-gift personality change, and heart bursts; removed unused collision reasons and duplicate constraint projection dirty checks.
- v39.16.20: localized the direct-feeding personality reason, normalized electrocution deaths to 「感電」, added detector-controlled gate fences, made chart legend labels fully clickable, and escaped non-ASCII runtime source.
- v39.16.21: hid pinch overlays for rope/rod/spring/wire connection items and added detector time schedules with a dual-thumb range control, overnight ranges, and persistent copy/save state.
- v39.16.22: shortened detector copy, removed the time-range explanatory hint, cascaded connection-item removal when any endpoint disappears, and repaired detached plushies so they return to a living owner or disappear with a missing owner.
- v39.16.23: excluded transient splat effects from all connection endpoint selection and renamed the user-facing feeding need from 「摂餌」 to 「食欲」.
- v39.16.25: added toilet-seeking before normal defecation; renamed rain shelter to parasol; added sunny +3.5C and unsheltered rain -3.5C felt-temperature corrections; parasols neutralize both and block sunbathing. Pet food, first aid, and sedative remain included.
- v39.16.29: replaced toilet-seeking with walkable toilet sand that immediately removes poop spawned on its surface; added a parasol ground shadow and explicit hot-sun/cold-rain temperature-seeking targets; fixed null candidate temperatures being interpreted as 0C.
- v39.16.29: aligned parasol placement overlay with its shade, made toilet sand absorb rain water, expanded Happy/Athletic/War presets, simplified Athletic rotators, and reserved their full rotation envelope from fences.
- v39.16.30: added a few bounce fences to War, reduced ordinary-fence restitution, restored ball collisions for visible sleeping Tarinai, moved nest-box tooltips closer, allowed movable-item placement overlap, and fixed delete-tool target lookup.
- v39.16.31: unified in-world tooltip spacing, added the Hair Trigger preset, and replaced physics-category line-like tool icons with distinct semantic silhouettes.
