Posts

Recap: The Cache Mismatch Problem In our previous post, we explained why pairing OpenCode / ClaudeCode with DeepSeek destroys your cache hit rate: DeepSeek uses strict full-prefix matching — a cache hit only fires when every byte from position 0 is identical to the previous request. Agent loops insert tool messages in the middle of the message array, breaking the prefix hash every turn. Anthropic-style cache_control segment markers are silently ignored. Result: near-zero cache hit rate, even though DeepSeek’s billing dashboard shows caching is “enabled.” The problem is not DeepSeek. The problem is that generic agent frameworks were designed for a fundamentally different caching mechanic. ...

TL;DR Pan, a kitchen-supply entrepreneur from Zigong, Sichuan, spent $280K and one full year of market research to open a 1,200 sqm wholesale warehouse-store on 450 Year Road in Vientiane, Laos. By cutting out importers and wholesalers, he undercuts local competitors by 15–20%. His advice to anyone considering the market: budget 60% above your estimate, learn the language before you ship inventory, and forget quick money. The 1,200 sqm Warehouse Bet: Pan’s Vientiane Store In Vientiane, on the 450 Year Road — the city’s main artery near the railway station and Dongdok University — there’s a store that looks like nothing else in Laos. ...

TL;DR A 2000s-born computer science graduate from Shenzhen University bypassed offers from Shenzhen’s Big Tech employers and invested $700K USD (5 million RMB) to open a menswear store in Vientiane, Laos. Within one month, the store was averaging $1,000–1,100 in daily revenue, with a claimed five-month payback. This case study breaks down the scouting process, the market structure, and the supply chain mechanics that make a “small and overlooked” market the right bet. ...

The Problem Nobody Talks About Every engineering team I’ve talked to in the past six months shares the same frustration: AI coding assistants are great, until you look at the bill. Let me give you a concrete example. We ran a React development task through a standard AI assistant setup. The task: implement a feature with proper error handling. The result? 20 minutes and 50,300 tokens consumed. For a single feature. In production, this compounds fast—multiplied across a team of ten engineers running dozens of sessions daily, you’re looking at serious API costs bleeding into your compute budget. ...

The Security Audit That Should Terrify You A security researcher recently scanned 900 publicly accessible configuration files on GitHub. Within minutes, they found 41 valid, active cloud service API keys — keys that granted immediate, unauthenticated access to production servers. No brute force, no social engineering. Just a simple git grep across misconfigured repos. This is not a hypothetical vulnerability. This is happening right now, at scale, across thousands of organizations. ...

The Solo Seller Who Broke the Mold A few weeks ago, I spoke with a TikTok seller who changed how I think about e-commerce automation. He’s a solo operator. One person. In a single month, he hit T3 — the top seller tier on TikTok US — managing达人 outreach, short video production, shipping, and customer support entirely by himself. His background? A programmer who systematically applied software engineering principles to every aspect of his TikTok business. After hearing his workflow, I can confidently say he’s operating at a level above 90% of TikTok merchants on the platform. ...

Introduction DeepSeek’s disk-based automatic context caching is famous for near 90% input token savings: cached prefix tokens cost just a tiny fraction of standard input pricing, with zero manual configuration required. Thousands of developers switch to DeepSeek chasing this aggressive discount for long system prompts, code rules, and repeated tool definitions. But a costly reality hits teams running ClaudeCode / OpenCode (code agent runtimes built for Anthropic-style cache_control) against the DeepSeek API: ...