A cron that does content marketing almost on its own (while I sleep)

The usual disclaimer, which I repeat gladly: no tickers here, no signals. This is a martech post disguised as fintech. It's about how a cron job can do content marketing almost on its own — and the "almost" is the important part — the raw material is financial, but the story is entirely editorial.

In one of the group's products there's a pipeline that, every week, picks a topic, drafts it and hands it to me ready for review; I read, I approve, and the rest of the chain publishes it and prepares the post for sharing. A little automatic editor working while I sleep — on Sunday night, to be precise. Here's how it's built, and why the interesting part isn't "the AI writes", but "the AI writes inside a chain".

Four stages, one chain

The pattern is trivial to state and precious to do: extract → draft → publish → share. Four separate stages, each with a single job.

• Extract: a weekly cron looks at the data and picks the week's topic — not "buy this", but "this is worth talking about". It's editorial selection, not a signal.
• Draft: from there comes a draft of educational content, written by the AI and checked number by number against the data it started from, with the teaching blocks in the right place.
• Publish: after my approval — always a manual act, by choice — the draft becomes published, versioned content, with a saved snapshot — so I always know what went out and when.
• Share: finally the distributable version is prepared. The actual sharing stays a human act, but the post's text is already written.

Why the chain, and not a single prompt

The temptation, with AI, is to ask for everything at once: "write me this week's content". It works, until it doesn't — and when it breaks you don't know where.

Splitting it into four separate stages has three advantages I paid to learn:

• You can stop in the middle. If the draft isn't convincing, the chain halts at the draft stage and publishes nothing. Bad content never reaches the audience.
• You can spot-check. Each stage leaves an inspectable artifact: the chosen topic, the draft, the published snapshot. It's the auditable log applied to content.
• You can change one piece without redoing everything. You improve how drafts are written without touching selection. The stages are colleagues, not one indivisible block.

The back-of-the-napkin numbers, editorial edition:

• Human interventions to ship a weekly piece: two — the review, about ten minutes, and the sharing, ten more. Never zero, by choice
• Stages that, when they break, stop the chain instead of publishing garbage: all of them
• Compute cost per piece: a few cents, estimated
• Brilliant pieces produced: none. Useful, consistent pieces: one a week

And that's the closing, true for fintech as for your company's newsletter: content marketing isn't won by whoever writes the most brilliant piece. It's won by whoever shows up every week. A machine, inside a chain with the right brakes, "shows up every week" far better than a human full of good intentions.

Meanwhile, I sleep.

On time.