Most internal docs are written once and read never. The problem usually isn’t the writing — it’s that nobody would think to look there, and if they did, they couldn’t tell in ten seconds whether it still applies.

The one section every doc needs

Put a “last verified” date and a one-line summary at the top of every doc, above anything else:

> Last verified: 2026-08-14 by @jsmith
> TL;DR: How to rotate the staging DB credentials without downtime.

This does two jobs. It lets a reader decide in two seconds whether to trust the doc, and it gives future-you a cheap way to signal “I checked this still works” without rewriting the whole page.

Structure by question, not by topic

Nobody opens a doc to “learn about deployments.” They open it because something specific is happening: a deploy is failing, they need to add a new environment variable, they’re onboarding and need to run the thing locally. Structure the doc as headers that are literally the questions people ask:

• “How do I run this locally?”
• “The deploy is stuck, what do I check?”
• “How do I add a new environment variable?”

This is different from documenting “how the system works,” which is a different document for a different audience (usually: nobody, until there’s an incident).

Length kills more docs than bad writing does

A doc that’s 200 words and correct gets read. A doc that’s 2,000 words covering every edge case gets skimmed once and never opened again, because the reader can’t find their specific question inside it.

If you have a lot to say, split it. One doc per task, linked from an index, beats one doc that tries to be comprehensive. Comprehensive docs are for reference material people search, not material people read start to finish.

Show the command, not the concept

Compare these two:

The deployment pipeline uses a blue-green strategy to minimize downtime during releases.

vs.

./deploy.sh staging   # deploys, waits for healthcheck, then flips traffic

The second one is more useful to someone about to deploy, even though it explains less. Concepts belong in architecture docs that a small number of people read once. Task docs should be almost entirely commands, code, and screenshots.

Put it where people already are

A wiki page that requires someone to remember it exists and go find it will be forgotten within a month. Docs get read when they’re linked from the place someone already is when they need them: a README in the repo, a comment near the error message, a link in the failing CI job’s output.

Make staleness visible, not silent

Stale docs are worse than no docs, because they cost someone twenty minutes of following broken instructions before they realize the doc lied. Two cheap defenses:

1. Put the doc next to the code it describes (same repo, same PR review), so it’s more likely to get updated when the code changes.
2. Add a comment in code that references the doc, so when someone changes the behavior, they see the pointer back.

Neither is perfect. Nothing except review discipline actually keeps docs current — but making the doc physically closer to the code cuts drift dramatically.

The test

Before you publish, ask: if someone hit this exact problem at 2am, would they find this doc, and would it work without them needing to ask you a follow-up question? If the honest answer is no, it’s not done. Write for the person who’s stuck, not for the version of the system in your head.