How a tip gets into Coffee & Cradle

Every baby app says its content is expert-reviewed. Ours says "Made by people. Checked by pediatricians." That's a lot of weight on seven words, so here's the work behind them.

This is the path from a blank line to your lock screen, and the ways a tip falls off it.

What a tip is allowed to be

The rules about shape come first. A tip is one small thing a parent can know or do today: a title of five words or fewer, then one to three short sentences. It's aimed at a window of the baby's age in weeks and at a time of day. It carries a source, and the source has to be a real, live, specific page on a short list of hosts: government and university domains, the NHS, the World Health Organization, and a named list of children's hospitals and professional bodies such as the AAP. A homepage doesn't count. A commercial site isn't allowed at all.

Some things a tip can't contain. A medication dose, any amount in milligrams or milliliters, is an automatic rejection. The right dose is your pediatrician's to give, by weight. Shaming language gets flagged. So does a tip that reassures ("this is normal," "don't worry") without saying when it stops being normal or when to call a doctor. We call that a missing boundary.

Step one: the automated checks

Every draft goes through the same automated checks first, whoever or whatever wrote it. Drafts come from our writers working to a written brief. We also use software to draft at volume against that same brief, and nothing a model writes reaches a parent without passing the checks below and a human eye.

The checks cover the schema, the controlled vocabulary of topics and categories, the title length, the age window, the source's host, the dose rule, the shaming rule and the reassurance rule. Near-duplicates of anything already in the library are rejected. Topic has to fit age: starting solids at two weeks old is rejected on sight. And every source URL gets fetched. A "not found" kills the tip. Fabricated links are the single most common failure in machine-drafted health content, so we don't skip this one.

The checks also read each tip's five public voices, not just the neutral text, because a parent on Savage granny reads the granny version. A dose that shows up in one voice and not the others is still a dose.

Step two: three readers, then three skeptics

Tips that get through go to a machine review in tiers: a paraphrase-duplicate check using text embeddings, an editor pass for voice and whether the tip is something you can actually act on, and an expert-style pass with three questions. Is it pediatrically safe. Does it fit the stated age. Does the cited page support this specific claim, not just the general topic.

Anything safety-critical, and anything in the health or feeding categories, then goes to an adversarial round. Three independent reviewers, each with a different brief (safety, age-fit, evidence), try to refute the tip. A majority against it kills it. So does one of them calling it unsafe. It's the most expensive step, so it only runs on the risky subset, roughly one tip in six.

Step three: people who know the subject

Machine review is good at duplicates, voice and obvious faults. It can't tell you whether a pediatric claim is right. For that, the whole active library gets built into one review page and handed to clinical reviewers, who read on their own and never see each other's verdicts. Two of them can reach opposite conclusions on the same tip without knowing it, which is the point of a second opinion. A person then resolves the disagreement.

A reviewer's verdict doesn't change anything by itself. A named person makes the edit, deliberately, and every edit re-runs the checks.

Step four: retirement

Tips don't last forever. When a reviewer or a source audit shows one is wrong, we retire it: inactive, with a written reason and, where one exists, a pointer to the tip that replaces it. Its ID is never reused, because old links point at it. We've retired nineteen so far, which is another way of saying we got nineteen wrong. A few of them, with the reasoning, because this is the part that earns the trust line:

• A tip that said swaddling reduces the risk of SIDS. It does not. The AAP's safe-sleep guide says plainly that "swaddling doesn't reduce the risk of SIDS." The tip also ran to sixteen weeks with no instruction to stop at the first sign of rolling, which the AAP says can be "as early as 2 months." Retired; replaced by tips that say the opposite.
• A tip recommending a weighted swaddle. The AAP: "Don't use weighted blankets, sleepers, swaddles or other weighted objects on or near your baby." NICHD's Safe to Sleep lists weighted items among the things to keep out of the sleep area. No safe rewrite existed. Retired.
• A tip that said to freeze a teething ring. The NHS: "Never put a teething ring in the freezer, as it could damage your baby's gums if it gets frozen." It directly contradicted four correctly sourced teething tips already in the library. Retired.
• A tip suggesting a steamy room for a cough. It appears, almost word for word, on the NHS croup page's list of things not to do: "do not put your child in a steamy room or get them to inhale steam." Scald risk, no benefit. Retired.
• A tip that called drawn-up legs after feeds "totally normal" and said to wait a day or two. That posture, with inconsolable crying, is how its own cited AAP page describes a condition that needs care right away. Retired and replaced with tips that keep the reassurance and add the red flag.

Several others went because a correct tip on the same theme already existed and the weaker one only added risk.

The voices don't get a pass

Each tip can arrive in Calm, Emojis, Sentient robot, Savage granny or Gandalf, or in Random, which picks one per tip. A voice can change the phrasing. It can't change what the tip says. One that adds, drops or exaggerates a recommendation is a bug, and the checks read all five. When a tip's wording is corrected, its five voices get thrown away and rewritten from the corrected text, so none of them goes on saying the old thing.

Underneath all five: swaddling may help some babies settle, but it doesn't reduce SIDS risk on its own; keep swaddled babies on their back on a firm, flat surface, and stop swaddling once they start trying to roll.

What this doesn't make us

It doesn't make a tip medical advice. A tip is general information about what's typical at a given age, with a source. Your pediatrician knows your baby. All we know is their age in weeks. When the two disagree, your pediatrician is right, and most tips say so in their last sentence.

It doesn't make us finished, either. The library is roughly 2,860 tips and we expect to retire more. If one looks wrong to you, open its source from the "why this tip" panel, and if the page doesn't back it up, tell us.

Why there are only six tips a day, and why none asks you to log anything, is in why we built a baby app that does less.

---

Coffee & Cradle sends six of these a day, chosen for your baby's age in weeks. The first week is free, and every tip carries the page it came from.