Resources

Learn how to build,
launch, and grow.

Guides, checklists, and tools from the Cosmonus team — written for founders, product teams, and anyone building something worth using.

Guides

Practical reading — no fluff.

Branding6 min read

How to brief a brand designer (and actually get what you want)

The questions to answer before you talk to anyone. Most projects go wrong because the brief was wrong — not the designer.

Web8 min read

Why your website isn't converting — and what to fix first

A framework for diagnosing conversion problems without guessing. Start here before redesigning anything.

AI10 min read

A plain-language guide to RAG, fine-tuning, and prompt engineering

What each technique actually does, when to use it, and what goes wrong when you pick the wrong one.

Product7 min read

Scoping your v1: the discipline that separates shipped from stalled

How to define the smallest version of your product that's genuinely useful — and how to defend that scope when everyone wants to add more.

SEO9 min read

Technical SEO in plain English: what to fix and in what order

A prioritised checklist for teams who want to improve organic traffic without hiring an agency yet.

Mobile5 min read

Native vs cross-platform: how to make the right call for your app

The decision framework we use with every mobile client. No dogma — just the trade-offs you need to understand.

Checklists

Download and use on your next project.

Website launch checklist

Everything to verify before going live — performance, SEO, analytics, redirects, and accessibility.

Brand handoff checklist

What to ask your designer to deliver. File formats, guidelines, font licences — the full list.

Product scope checklist

Questions to answer before you start building. Prevents scope creep and six-month delays.

AI project audit checklist

Map your workflows before you automate anything. Identifies where AI adds real leverage.

Tools we recommend

The stack we actually use and trust.

These aren't affiliate links — they're the tools we reach for on our own projects. All have generous free tiers to get started.

FigmaDesign

Industry-standard design and prototyping tool. Free tier is genuinely useful.

VercelHosting

The fastest way to deploy a Next.js project. Zero-config deployments with global edge network.

AWSInfrastructure

Cloud infrastructure for scalable backends, storage, and compute. The industry standard for serious deployments.

SupabaseBackend

Open-source Firebase alternative — database, auth, and storage with a generous free tier.

Google AnalyticsAnalytics

The baseline for understanding traffic, acquisition, and user behaviour on any web property.

HeatmapsAnalytics

Visual overlays showing exactly where users click, scroll, and drop off — essential for conversion work.

Anthropic ClaudeAI

The model we use for AI features. Strong at reasoning, instruction-following, and long context.

LangChainAI

Framework for building LLM-powered applications — chains, agents, RAG pipelines, and tool use.

RailwayInfrastructure

Simple, fast infrastructure for deploying backends and databases without DevOps overhead.

Pencil & PaperDesign

Still the fastest way to think through a layout, flow, or idea. No app beats it for the first five minutes.

Glossary

Terms you'll hear when working with us — explained plainly.

RAG
Retrieval-Augmented Generation — AI that answers from your documents, not just its training data.
Core Web Vitals
Google's performance metrics: LCP (load speed), FID (interactivity), CLS (visual stability).
Brand system
The complete set of visual and verbal rules that make a brand consistent across every touchpoint.
CMS
Content Management System — software that lets non-developers edit website content.
Conversion rate
The percentage of visitors who take a desired action — sign up, buy, contact, download.
Design system
A library of reusable UI components with documented usage rules, built for consistency and speed.
Information architecture
The structure of a website or app — how pages and content are organised and labelled.
Socket.io
A library for real-time, bidirectional communication between browser and server — used for chat, live updates, notifications.