VelvetShark • Radek Sienkiewicz

I've run an OpenClaw agent every day since January and spent too much time babysitting it.

Xcode has allowed development installs for years.

Poland never dubbed films with a cast of actors.

Your OpenClaw agent works great for 20 minutes, then silently loses its instructions.

Most OpenClaw content right now is first-week impressions or setup tutorials.

If you're running OpenClaw, there's a good chance you're burning money without realizing it.

Most developers use AI to code faster today, but they're missing the bigger opportunity.

Go from a raw Excel file with half a million rows to a finished report with KPIs, charts, and cohort analysis - step by step, with real prompts you can copy.

A personal AI assistant that runs on a $5/month server, lives in your messaging apps, remembers everything, and actually reaches out to help you.

The spec workflow that went viral: instead of telling Claude what to build, you let Claude interview you first.

A daily learning journey of learning how to build a large language model from scratch.

Finally, an AI image generator that doesn't give up after one try.

A humorous exploration of the uncanny resemblance between AI company logos and human anatomy.

My month-long exploration of AI agents, where I built practical solutions from simple chatbots to email automation.

After a transformative year of monthly challenges in 2021, I'm embarking on a new set of 12 challenges for 2025 - from AI agents and sleep optimization to breathwork and niche expertise.

A free Chrome extension that allows you to quickly and easily summarize articles on any website, with one click or one keyboard shortcut, you'll get a concise summary in just a few seconds.

EIP-3074: a transformative Ethereum proposal introducing new opcodes that enable externally owned accounts (EOAs) to delegate transaction capabilities to smart contracts.

ERC-1271 enables smart contracts to verify signatures, allowing them to sign transactions.

ERC-4337 brings account abstraction to Ethereum, enabling smart contract wallets, ERC20 gas fees, and improved UX without sacrificing decentralization.

Discover the four main types of blockchain standards—EIPs, ERCs, RIPs, and CAIPs—in this detailed guide.

There's a popular misconception that there are 24 time zones in the world.

A cheetsheet for a Solidity contract layout and structure, to know what goes where and how.

How to understand Merkle trees, write and test your smart contract, together with Solidity exercises

What I learned from doing 12 challenges in 12 months, and how it changed my life.

December Challenge summary: Daily post on Instagram.

How I became a billionaire in 15 minutes.

I'm lazy.

November Challenge summary: No coffee.

October Challenge summary: Hanging 7 minutes a day, in total.

Max values for each uint in Solidity, from uint8 to uint256.

September Challenge summary: One hour of learning every day.

The formula and explanation of how not to do stupid shit and what to do instead.

August Challenge summary: No alcohol.

A detailed journey of 200 days of learning web3: what worked, what didn't, what I built, what I learned, highlights, downsides, resources, what's next.

July Challenge summary: Cold shower in the morning.

June Challenge summary: Waking up before 9 AM.

May Challenge summary: 30 minutes of reading a paper book.

Month 2 summary of learning web3 development.

April Challenge summary: zero sugar.

Month 1 summary of learning crypto development.

I'm learning web3 and sharing my learnings in public.

I was stuck with a toxic friend and a stranger.

March Challenge summary: zero sugar, zero news.

February Challenge summary: Daily publishing.

January Challenge summary: what it was, how it went, what I learned from it, will I keep doing it?

What happens (and what doesn't happen) when your article is mentioned in the newsletter that goes out to 2m+ people.

A compilation of research, findings, and my own experience on developing a bias for action.

Twelve monthly challenges, one for each month in 2021.

Tech and fashion logos are becoming increasingly similar, all of them using sans serif fonts.

I couldn't buy groceries online because the waiting time for delivery was 2 months.