Blog
Articles and insights.
What we have learned about launching and growing products, recorded by the people doing the work.
01 · Latest
- Product Development
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02 · All articles
The index, year by year.
2026
What actually gets faster with AI-assisted development, and what does not
AI coding assistants make some engineering work dramatically faster and leave the rest exactly as slow. This article covers the numbers from studies and agencies, what we see on our own projects, and the practices that decide whether the speed is real.
How we prototype with AI tools, from a brief to an interactive prototype in days
The first thing a client sees from WeaveLines is a high-fidelity interactive prototype, in days. How a brief becomes screens with Claude Design, Figma Make and Replit, what the designer decides, what we validate with you, and what happens next.
How to decide whether to build or buy AI for your product
An AI capability usually takes one of three shapes. It can be an off-the-shelf tool, a feature built on a foundation model, or a custom model. This guide covers how to choose between them on value, data, cost over five years and the risk of being wrong.
2025
RAG explained for founders, making an AI assistant answer from your own data
Retrieval-augmented generation is how an AI assistant answers from your documents and records instead of guessing. What it is, when you need it, where it fails in production, and what it takes to build one that holds up.
What vibe coding is genuinely good for and why it does not survive real users
Vibe coding produces a working demo in an afternoon, and that is real. It also produces code nobody has read, with security flaws in about half of it, and it breaks the moment real users arrive. This article draws the line, presents the evidence, and sets out what to do instead.
Cloud costs for a startup on AWS, Cloudflare or a plain server, and how to keep the bill in check
This article explains where a startup’s cloud bill comes from, what AWS, Cloudflare and a plain server each cost in money and in attention, and the habits that keep infrastructure spending in proportion to the product.
2024
What a fractional CTO is, when a startup needs one and what it costs
A fractional CTO gives a startup senior technical leadership on a part-time basis, covering the stack, the architecture, the hiring and the decisions that determine whether the product can scale. This guide explains what the role covers, when you need one, what it costs, and how it compares to a full-time CTO or an agency.
When a startup should build a design system, and what it saves later
A design system is the set of tokens, components and rules that keeps a product consistent as it grows. For a startup the question is not whether to have one but when. This article covers what a design system is, what it saves, when it is too early, and how to start small.
Fixed price or time and materials, and how to choose the engagement model for your product
Fixed price gives you a number before work starts. Time and materials gives you room to change your mind. Which one fits your product depends on how well the scope is known. This article covers how to choose, what to write into the contract, and when to switch.
25 questions to ask a software development company before you sign
Before you engage a software development company, ask these 25 questions about their process, the people who will do the work, engineering quality, money and what happens after launch, together with the answers that should give you pause.