Updates

Short operational notes from Sentinel Fortune — one idea, stated plainly, with the reasoning attached.

Update · Operating boundaries

AI drafts. Licensed people decide.

The single rule that makes AI safe to use inside a licensed trade — and what goes wrong the moment it is relaxed.

1 August 2026 · 3 min read
Update · Estimating

The four questions that make an estimate defensible

Estimates lose money in what they leave out. Four questions, asked before the estimate goes out, close most of that gap.

29 July 2026 · 3 min read
Update · Field operations

What belongs in a field note

"Replaced part, tested, ok" is where invoicing disputes begin. Seven fields turn a fragment into a record that survives a callback.

25 July 2026 · 3 min read

New products, guides and updates

Occasional email when something is actually published — a new product, a new guide, or a meaningful update to one you already own. No schedule to fill, so no filler.

Email signup is not live yet. The list is not open for subscriptions while the delivery system is being set up, and we would rather say so than collect addresses we cannot yet mail.

To be added by hand in the meantime, email contact@sentinelfortune.com with the subject “Newsletter”. You can also subscribe to the Atom feed, which is live now and carries every article, guide and update.

AI drafts. Licensed people decide.

The four questions that make an estimate defensible

What belongs in a field note

New products, guides and updates