https://blog.manana.icu/一个人在做一个 AI 伴侣应用：架构、取舍、踩坑与复盘。https://blog.manana.icu/p/why-ai-characters-repeat.htmlhttps://blog.manana.icu/p/why-ai-characters-repeat.htmlFri, 18 Sep 2026 00:00:00 +0000A community report said our AI companion kept repeating one fact. The cause was not the model — it was that our anti-repetition layers were only wired into one of our two chat paths.https://blog.manana.icu/p/guards-instead-of-memory.htmlhttps://blog.manana.icu/p/guards-instead-of-memory.htmlFri, 18 Sep 2026 00:00:00 +0000Four months, 1783 commits, one person. Memory is the least reliable asset in a solo project — so every mistake we made became a guard test whose comment explains how it originally broke.https://blog.manana.icu/p/features-i-deleted.htmlhttps://blog.manana.icu/p/features-i-deleted.htmlFri, 18 Sep 2026 00:00:00 +0000In a one-person product, the hardest engineering skill is subtraction. Four features that were built (or half-built) and then deliberately removed — and what each removal cost.https://blog.manana.icu/p/designing-against-sameness.htmlhttps://blog.manana.icu/p/designing-against-sameness.htmlFri, 18 Sep 2026 00:00:00 +0000Long conversations degraded into canned mannerisms. The root cause wasn't the model — it was that 34 of our 35 prompt sections were byte-identical every single turn.https://blog.manana.icu/p/architecture-and-tradeoffs.htmlhttps://blog.manana.icu/p/architecture-and-tradeoffs.htmlFri, 18 Sep 2026 00:00:00 +0000A solo-built AI companion app: 211 API routes, 97 backend modules, 45 features — and the architecture decisions (and refusals) that kept a one-person project shippable for four months.