2,300 years ago, the kings of Alexandria had an obsession: gathering every book in the world in one place. They built the largest library of Antiquity, then, in front of the harbour, on the island of Pharos, a tower whose fire guided ships to the city every night. The library kept knowledge, the lighthouse made it visible. Your company can work the same way, and now that AI can write, it only takes a few minutes a week.
I made a 16-minute masterclass about it, timed demo included (the video is in French). Here is the essence, and the system I am giving away so you can set it up yourself.
Your week goes up in smoke every Friday evening
Think about your week. You met clients, brought your teams together, made decisions, solved concrete problems: that is the value your clients pay you for. But everything you explained only served the person in front of you, and on Friday evening, because nobody captured it, that knowledge disappears, like Alexandria's when its library burned.
What you explained to 1 client could shed light for hundreds of people who already know you: today's and yesterday's clients, the prospects you have met.
The Library: a second brain that keeps your week
Tradition has it that every ship entering the port of Alexandria was searched. Books were looked for, copied by hand, the library kept the original and the captain sailed away with the copy. All the knowledge that passed through the city stayed there.
That is the role of a company second brain: a place where the whole week is kept. Meetings arrive summarised, decisions are recorded with their date, ideas you dictate are filed. At Codito, our AI agents are connected to it: they know precisely what happened each week.
The Lighthouse: a newsletter every week
A library, however vast, cannot be seen from the sea. The second stroke of genius of Alexandria's kings was the lighthouse, one of the 7 wonders of the world, whose name comes from the island of Pharos. Your lighthouse is a newsletter: once a week, you take the best of your library and send it to your clients and prospects.
Two things then happen. Every week, they see what you can do, without you selling anything. And the day they need you, yours is the first name they think of: they book a meeting, or they recommend you. My Codito BTP newsletter goes out every week to nearly 2,000 construction business leaders, and it brings me meetings, then clients.
How much a newsletter can bring in
Let us run the numbers with cautious assumptions, to be replaced by your own:
- 1,000 contacts and one edition a week;
- 20% of recipients open and 2% click: about 20 people raise their hand with each send, more than 1,000 over a year;
- 1 in 20 books a meeting, 1 meeting in 5 becomes a client: about 10 new clients a year;
- with an average basket of €3,000 per client per year, that is about €30,000 a year.
This calculation leaves out what clicks cannot measure: clients who come back, and those who recommend you because yours is the first name that comes to mind.
The demo: 4 min 42 of my time
The Codito BTP newsletter is written by an AI agent I named Girardin. An agent is a program given a mission that organises itself to carry it out; in practice, a file of instructions (a skill) you give to your AI. Girardin draws its material from 3 places: the second brain, my ideas when I talk to it, and the news, which it looks up by itself. It blends everything and writes the edition in my style.
It also knows the trap almost every email falls into: an email is displayed under much stricter rules than a website. Outlook for Windows, for example, renders emails with the Word engine, and a layout designed like a web page arrives in pieces. The agent produces HTML code built to display cleanly everywhere, which you paste into your sending tool (I use Brevo, a French solution; Mailchimp and the major tools accept the same format).
In the video, I timed a complete edition, from the instruction to the campaign ready in Brevo: 4 min 42 of human time, while the agent worked alone for 13 min 41. Meanwhile, you do something else.
Lighting several lighthouses
Alexandria had only one lighthouse; you can light several. I have 2: the Codito Sunday for business leaders in every sector, and the Codito BTP newsletter for construction. Take Claire, a chartered accountant: her clients do not have the same questions. She can light one lighthouse for craftsmen, another for restaurant owners, a third for the liberal professions. Same library, same agent, a different light for each audience, and every reader feels she is talking about them.
The 3 rules to keep your lighthouse burning
- Light it at a fixed time. Same day, same time, every week: your readers get into the habit and end up waiting for you.
- Make them raise their hand. Ask a question answered in 1 click, with 3 options ("What is your biggest concern this month?"): those who click tell you what is on their mind, and you know whom to call back.
- The flame is you. AI does the heavy lifting, but the ideas remain yours: you keep the creative part, and it builds on the value you already created during the week.
The system, free
I am giving away the skill I use. You launch it in your AI (Claude, for example): it asks about your business and your clients, personalises itself, brand guidelines included, then improves with every edition when you tell it what you did not like. That is how I built mine, week after week, over 6 months.
To receive it, email me PHARE, or send me NEWSLETTER on LinkedIn.
To apply it to your company right away, paste the video link into your AI along with the text from its YouTube description: it will ask its questions, then propose the plan of your first edition.
Doing it with us
We set this system up for the business leaders we support, among other agents, as part of the AI Partnership: second brain, writing agent, sending settings and results tracking. If you want to light your lighthouse without spending 6 months on it, let us take 30 minutes on a video call: I look at your company and tell you which lighthouse to light first, and for which clients.
More than 2,000 years ago, a lighthouse took years of construction. Today, with AI, you light yours in a few minutes, and it is the same shift everywhere in your company: what took weeks now takes minutes.
