Finally, product and engineering on the same page.
Monocle helps product managers write clear feature specs, improve communication with engineering, and get plain-language alerts the moment the code and spec no longer matches.
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Handoffs cause misalignment
The spec lives in one tool, engineering works in another. Every handoff loses a little of what you meant.
Specs go stale the moment they ship
AI writes and rewrites more of your product every week. The document says one thing, the product does another, and nobody knows until a customer does.
Trust erodes silently
Gaps between what was agreed and what was built compound quietly until they surface as support tickets, rework, or arguments about who said what.
Write it, share it, and catch mismatches while there's still time.
Monocle helps you write the spec, tighten it with AI, and review it with engineering. It checks the spec against the product as work happens. You find out during the build, not after launch.
Write
Start from a rough draft. Monocle helps you write it: AI flags weak or ambiguous sections and asks the questions engineering would ask, so you tighten the spec before anyone starts building.
Share
Send the spec to engineering for review. Talk it through in comments until everyone agrees on what is being built.
Get notified
As engineering works, Monocle checks each change against the spec. If a section no longer matches, it tells you which one and what the product now does in plain language, while you can still course-correct.
Decide
Accept the change, or flag it as unintended so the team catches the misalignment early in feature development, not after launch.
Keep going
Draft the next spec while the last one is being built. Monocle keeps every version: draft, in review, and accepted.
Help writing the spec. Help keeping it true.
Monocle helps you write a spec engineering can build from. If the product starts to diverge you get notified using plain-language product behavior, not complex engineering details.
Help writing the spec
Not a blank page. Monocle reads the whole spec, finds what's ambiguous or thin, and asks the questions engineering would have asked — before you share it. Open any thread for a second opinion.
Plain-language alerts
As soon as the product and the spec disagree, Monocle explains it as user-visible behavior: what the spec promised, what the product now does, and which section to look at — while the feature is still being built.
Easy setup with GitHub
Connect GitHub and you're set up. Specs go to engineering for review where the team already works.
Decision history
Every accept and flag is recorded (who, when, and why) with the spec, so agreements are never lost to memory.
The same spec engineering builds from
Engineering and AI assistants work from the same spec you wrote, so there is one agreed description of the feature — not a PM doc and a separate engineering version.
Built for high-velocity teams
For teams that move faster than anyone can keep the spec updated by hand. Monocle helps you write it once, then keeps what you agreed and what the product does honest — during the build, without extra meetings.
Monocle is invite-only right now.
We onboard every team personally so your first spec is set up right. Tell us a little about your team and we'll be in touch to create your account.
- Personal onboarding. We help you write your first spec and connect GitHub.
- Quick reply. We usually respond within one business day.