v0.9.0 — What we build section (stateful AI / house framing) + STATEFUL term page in 4 languages

v0.9.0 — What we build

The org README now says, in one section, what all eleven modules have always had in common.

Added

• New README section "What we build / 私たちが作っているもの" (5 files, 4 languages), between Why and What: we build stateful AI — not the agent, but the home. The brain (the model), the agent itself, and a new persona are the three things we never build. State piles up in $HOME; layers raise the resolution of who the agent is; and the tools we make are the ones the stateful AI of the future will take for granted. Closing couplet: the furniture may change — including everything we make; the resident never does. (#66)
• STATEFUL.md term page in 4 languages (STATEFUL.md / .ja / .zh / .th, canonical: Japanese): what "stateful AI / stateful agent" means, the two depths of the word (plumbing vs. being), how this org implements it, what counts as furniture, how it differs from a knowledge vault, and why stateful is only the starting point — the goal is the growth of relationships.

Changed

• Ecosystem intro in the generated modules block, matching family-os v0.16.0: furniture and household workings — none of it overwrites who the agent is.

Review

5-seat heterogeneous review (Gemini / Kimi / GLM / Grok / Codex), r1 → r3, all seats cumulative GO — including fixes that made the copy more honest: the $HOME mechanism is now explicitly scoped as this org's chosen implementation, not a general description of stateful AI. Full record on #66. Sibling release: caty-ai/family-os v0.16.0.

Full diff: v0.8.0...v0.9.0