· 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.
vercel
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· Research AI
Google OAuth for Research AI: How the Sign-In Loop Actually Works
Research AI lets guests use cached learning topics for free. Gmail sign-in unlocks unlimited live AI research.
· Research AI
Shipping Research AI: Vercel for UI, Fly for Worker + SQLite
Research AI reuses the Invest AI deployment shape:
· Platform (Vercel + GitHub) · applies across XingAI apps
Vercel Git Auto-Deploy Is Not Limited to Public Repositories
It is easy to assume that “Connect Git Repository” on Vercel only works for public GitHub repos — especially when your dashboard still shows Connect Git because you have been sh…
· 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
Shipping Invest AI V1: Runbook Thinking for Fly.io + Vercel
[ADR-004](2026-05-12-v1-hosting-fly-io.md) explains why we picked Fly.io for the Python side and Vercel for the Next.js side. It does not replace copy-pasteable commands, projec…
· XingAI Invest AI
Hosting an AI Side Project for $0: How We Picked Fly.io for Invest AI V1
We had the V1 of Invest AI working locally. The frontend was already on Vercel — that part is solved for everyone. The harder question: