· XingAI Tech Blog
The Archive Was Already Written. It Just Was Not a Site.
This repo already had 88 English + 88 中文 posts. Last write: 2026-08-05. Public GitHub Markdown.
nextjs
Filter the archive by the labels we put on each post.
· XingAI Agent Firewall
Shipping the Approval Queue Dashboard (and a TypeScript 7 Wall Nobody Warned Us About)
[ADR-003](https://github.com/xingaiapp/xingai-agent-firewall/blob/main/docs/adr/003-approval-workflow-ledger.md) specified four one-click approval actions back in the PRD. [ADR-…
· XingAI Meal Coach AI
Meal AI: Decision Ledger in a Next.js App with No Backend
Meal AI v4 is a pure Next.js app — no Python backend, no database, all decision logic in TypeScript on the client. The [Decision Ledger schema](https://github.com/xingaiapp/xing…
· Research AI
Staged SSE Without Spoilers: Research AI Wait UX
Cache miss means queue + worker. Users wait. A spinner alone feels broken; streaming half a verdict would lie.
· Research AI
Shipping SEO and AEO on Research AI (Single URL, Three Locales)
The marketing site puts locale in the path (/zh/…). Product apps like Research AI switch language in the header and persist to localStorage. SEO still has to ship.
· T Today / invest-t-advisor (`t.xingai.app`)
Two Safety Nets Before Push: Husky pre-push and `npm run check`
[T Today](https://t.xingai.app) ships rule-engine logic, Prisma schema, and OpenAI vision routes in one Next.js repo. TypeScript can look fine in the editor while tsc fails. A r…
· XingAI Travel AI — `xingai-travel-ai`
Travel AI as a Decision System: Compare First, Book Second
Most travel sites answer: “Here are 400 flights.”
· T Today / invest-t-advisor
Rules First, AI Second: T Today’s Two-Layer Decision Engine
T Today (t.xingai.app) answers a narrow question:
· T Today / invest-t-advisor (`t.xingai.app`)
Opening T Today to Guests — Three Free AI Runs, No Login Wall
[T Today](https://t.xingai.app) is the screenshot-first coach: upload brokerage holdings, get a 做T plan with buy zones and rule checks. It’s paper-only — no orders.
· T Today / invest-t-advisor
When Bilingual JSON Looks Fine in the Network Tab but Empty in the UI
T Today’s holdings coach uses OpenAI with responseformat: { type: "jsonobject" }. The model returns a big JSON blob with zh and en blocks. Users switched language — still empty …
· InvestSim / invest-performance-sim (private)
InvestSim Becomes a Live Paper Engine
InvestSim started as a dashboard that could show a daily AI pick. Today it became a small, deterministic paper-trading engine.
· InvestSim / invest-performance-sim (private)
Splitting the Paper Lab: Why InvestSim Lives in Its Own Repo
[Invest AI](https://xingai.app/apps/invest-ai) answers “what does today look like?” — signals, dashboard context, and (eventually) richer decision surfaces. A different question…
· XingAI Invest AI
Four Runtimes, One Repo: Why We Skipped Nx (For Now)
Invest AI is not one app — it is four top-level packages: