Ayo Osunjuyigbe — Writings https://exxayo.com/ Technology executive and engineer with 10+ years building products across AI, Web3, DeFi, and consumer. Writings on product, engineering, and markets. en-gb Sun, 06 Sep 2026 12:00:00 GMT hi@exxayo.com (Ayo Osunjuyigbe) hi@exxayo.com (Ayo Osunjuyigbe) The roadmap was a list of promises, not a plan https://exxayo.com/w/the-roadmap-was-a-list-of-promises https://exxayo.com/w/the-roadmap-was-a-list-of-promises Sun, 06 Sep 2026 12:00:00 GMT A team of eight cannot ship seven trading surfaces. I treated the roadmap as a way to keep everyone happy. Then I cut it so something could launch. Building Binance has an official MCP now. Do not use the one with your API key in mcp.json. https://exxayo.com/w/binance-mcp-is-a-subaccount https://exxayo.com/w/binance-mcp-is-a-subaccount Sat, 22 Aug 2026 12:00:00 GMT Binance shipped a first-party MCP. A dedicated subaccount is the product. The unofficial server with your API secret is the wrong object. AI A2A is for talking to other agents, not for calling Stripe https://exxayo.com/w/a2a-is-not-a-tool-call https://exxayo.com/w/a2a-is-not-a-tool-call Wed, 19 Aug 2026 12:00:00 GMT You do not need A2A to call Stripe. You need it when two agents do not share a prompt. AI They asked if we were using AI. They wanted it on the slide. https://exxayo.com/w/they-asked-if-we-were-using-ai https://exxayo.com/w/they-asked-if-we-were-using-ai Tue, 11 Aug 2026 12:00:00 GMT The room did not want an architecture. They wanted the word on the deck, because that is what makes a company look investable. I almost added a chat box to a path that already worked. Building MCP Apps draw forms inside your chat. Confirm before you submit. https://exxayo.com/w/the-form-in-the-thread-is-the-server https://exxayo.com/w/the-form-in-the-thread-is-the-server Thu, 30 Jul 2026 12:00:00 GMT MCP Apps draw HTML inside the chat you already trust. The iframe looks like the host. It is the server. AI When the laptop closes, the cloud agent is still running https://exxayo.com/w/the-laptop-closed-the-agent-kept-going https://exxayo.com/w/the-laptop-closed-the-agent-kept-going Fri, 10 Jul 2026 12:00:00 GMT Cloud agents keep working after the laptop closes. That VM is not a copy of your machine, and the Secrets tab is prod. AI We celebrated thirty thousand users. That was not the company. https://exxayo.com/w/the-number-was-not-the-business https://exxayo.com/w/the-number-was-not-the-business Tue, 16 Jun 2026 12:00:00 GMT On EXX the number on every slide was testnet wallets. It felt like traction. It was not a business, and it did not get us to mainnet. Building I called it standards. I was the bottleneck. https://exxayo.com/w/i-called-it-standards https://exxayo.com/w/i-called-it-standards Tue, 19 May 2026 12:00:00 GMT Nothing shipped until I had seen it. I thought that was how you keep quality. It was how you stop a team. Building MCP tool descriptions are a prompt injection attack https://exxayo.com/w/mcp-tool-poisoning https://exxayo.com/w/mcp-tool-poisoning Wed, 04 Feb 2026 12:00:00 GMT The MCP tool description is prompt. The user never sees the full string, and the server can change it after you clicked approve. AI Loading in the browser does not mean it is secure https://exxayo.com/w/it-loaded-is-not-the-review https://exxayo.com/w/it-loaded-is-not-the-review Wed, 21 Jan 2026 12:00:00 GMT It loaded in the browser is a render check. Ship is whether a stranger can read the other stranger. Engineering How to implement a 7702 delegate that is not a backdoor https://exxayo.com/w/eip-7702-delegate-not-a-backdoor https://exxayo.com/w/eip-7702-delegate-not-a-backdoor Tue, 23 Dec 2025 12:00:00 GMT Signing the right 7702 address can still wreck you. A poorly implemented delegate is a power of attorney over the EOA. Web3 After Pectra, one signature can rewrite how your wallet works https://exxayo.com/w/eip-7702-one-signature https://exxayo.com/w/eip-7702-one-signature Thu, 18 Dec 2025 12:00:00 GMT After Pectra, one authorization signature can rewrite how an EOA executes. Wallets that treat that as a generic confirm are the attack. Web3 With PeerDAS, your node no longer downloads every blob https://exxayo.com/w/peerdas-fusaka-blobs https://exxayo.com/w/peerdas-fusaka-blobs Thu, 11 Dec 2025 12:00:00 GMT Fusaka shipped PeerDAS. Your node no longer downloads every blob. That is a different trust object than having the bytes. Web3 ChatGPT stayed in the chat when it should have stopped https://exxayo.com/w/chatgpt-will-not-look-away https://exxayo.com/w/chatgpt-will-not-look-away Tue, 02 Sep 2025 12:00:00 GMT A product reading of Raine v. OpenAI: sycophancy, long-chat safety decay, and what an age-gated chat box has to refuse. AI The support inbox had the spec. I shipped the flashy feature. https://exxayo.com/w/the-ticket-was-the-spec https://exxayo.com/w/the-ticket-was-the-spec Mon, 18 Aug 2025 12:00:00 GMT Early on, the launchpad inbox was not asking for a new template. It was asking why a sale had ended and the tokens were still stuck. We fixed that. The lesson stayed. Building You can write an essay you cannot quote https://exxayo.com/w/your-brain-on-chatgpt https://exxayo.com/w/your-brain-on-chatgpt Wed, 18 Jun 2025 12:00:00 GMT MIT measured cognitive debt: you can produce an essay you cannot quote. Do the hard pass first, then let the model in. AI Impermanent loss is the wrong number. Track LVR instead. https://exxayo.com/w/lvr-not-impermanent-loss https://exxayo.com/w/lvr-not-impermanent-loss Wed, 12 Feb 2025 12:00:00 GMT The IL widget compares you to a static bag. The tax LPs pay every block is loss-versus-rebalancing. Web3 Claude can control your desktop now. Confirm before it clicks. https://exxayo.com/w/claude-can-see-the-desktop https://exxayo.com/w/claude-can-see-the-desktop Tue, 29 Oct 2024 12:00:00 GMT Anthropic shipped computer use. There is no hosted desktop — you send a screenshot, it sends coordinates, and your loop moves the mouse. AI