The newsroom sourcing rule applied to a marketing team

In a newsroom, a claim runs when you can say where it came from. Not when it sounds right, not when the editor likes it, not when a competitor said something similar last week. A reporter who writes “sales rose sharply” gets the copy back with one note in the margin: how much, and says who.

I trained as a journalist before I became a marketer, and the sourcing rule is the one habit I refused to leave at the door. Marketing teams break it constantly, usually without noticing. “Industry-leading.” “Trusted by thousands.” “Powerful, flexible, easy.” Each is a sentence with a hole where the source should be, and a sophisticated buyer reads the hole first.

Here is what the rule looks like when a marketing team runs on it, and what it took to make nine people keep it without an editor reading every line.

Every number carries a source or a marker

The rule is short. A number, a client, a date or a title goes into copy when it can be traced to a record: a dashboard, a document, a published page, or the person who owns the fact saying so. If the sentence needs a number and the record does not hold one, the number does not get estimated. It gets a marker.

On my team the marker reads [NEED: what’s missing]. A draft can go to review with markers in it. It cannot go to the public with one, and nobody closes a marker by rounding. The marker is a to-do list, not a failure. It tells the writer exactly what to find and whom to ask.

The same rule governs credit. Work designed and shipped with Claude Code is described that way. Not “engineered,” which claims a credential nobody on the team holds, and not silently, which invites the reader to find out later and discount everything else.

Standards nobody opens are not standards

Writing the rules down was the easy part. A style guide is a document people agree with and never open. The standards had to live where the writing happens.

So the standards became tooling. A library of Claude skills, built with Claude Code, encodes the editorial rules: the banned words, the claim-first openers, the count-noun guardrails that keep GoDataFeed’s positioning facts exact (200+ integrations and 40+ channels, never the nouns swapped). It encodes the positioning guardrails from the Core Narrative 2026–2027 and the page templates each kind of asset follows. A writer drafting a landing page, a social post or a help article works inside the skill for that asset, and the skill holds the standard whether or not an editor is awake.

Two more pieces sit beside the skills. A retrieval-augmented engine drafts executive bylines from the company’s own record rather than from a blank page, so the sourcing rule is built into the first draft. And a Claude Code-to-Webflow bridge ships pages against the live site, so the distance between an approved draft and a published page is a command, not a ticket.

What the rule buys a small team

GoDataFeed’s marketing team is nine people. Those nine run positioning, launches, the demand funnel, two content series, in-house video and paid media across six platforms. The function produces what a larger one would, and the reason is not that anyone works harder. The standards are written down, the tooling enforces them, and the review that remains is about judgment rather than hygiene.

The sourcing rule also changes what the team argues about. Without it, a review meeting is a debate about adjectives. With it, the meeting is a list of markers and who can close them. One is taste. The other is work.

Where to start

If you want the rule on your own team, start with three things.

Write down the banned list and the required list: the words that never appear, and the facts that must appear exactly as written. Keep both short enough to memorize.

Decide what counts as a source, and write that down too. A screenshot of a dashboard counts. A competitor’s claim does not. A number someone remembers from a meeting does not, until the person who owns it confirms it.

Then put the rules where the work happens. If your writers draft in a document, the rules go in the template. If they draft with an AI tool, the rules go in the tool. A standard that depends on someone remembering it is a standard with a half-life.

A newsroom learned all this one correction at a time. A marketing team can borrow the lesson without paying for it.