Write your requirements as durable specs with permanent IDs. Spec Engine binds them to the real code across every repo and catches drift in CI, before it ships.
Spec Engine treats a requirement like a machined part: stamped with a permanent ID, bound to the code that implements it, and measured continuously for drift.
A spec resolves to one answer: implemented, verified, drifted, or broken. No ambiguity, no vibes.
Specs clamp to code like tooling to a workpiece. Move the code, the binding follows or flags.
CI is the referee. Drift is caught before it ships, not discovered in production a quarter later.
We're not replacing your PRD. But the day you ship, it stops keeping up. The fix QA found never made it back in. The quick customer request got deployed to the web app and forgotten on mobile. Six months on, the doc describes a product you no longer have.
Specs in Spec Engine live past production. Every one is versioned, and it only changes by being superseded or removed on purpose, never by quietly falling out of sync.
Capture each requirement as a durable spec. Spec Engine stamps it with a permanent ID that never gets reused.
Tag the code and tests that satisfy it with @spec(ID). The binding follows refactors across repos.
Every run records who implemented each requirement and who verified it with tests, per repo.
The moment an agent or human drops or contradicts a requirement, the gate blocks the merge.
One coverage matrix across the whole platform: who implemented each requirement in source, who verified it with tests, and where it has drifted onto an outdated version.
Changes used to be filed per service: an issue for the API, one for the web app, one for mobile. Then you forget the internal admin and the support tools. Then the customer portal, and now it's broken.
Not with Spec Engine.
Don't let your agent gaslight you into thinking you never wrote the requirement.
A requirement that quietly disappears without being superseded is indistinguishable from an agent dropping it. Agents can't tell intent from accident, so the CI gate holds the merge, and the audit trail shows exactly who wrote it and when.
Supersession is what lets every agent on the platform tell drift apart from intention.
For people who know exactly what they want. You set the requirement; Spec Engine holds everyone to it, agent or human.
Every requirement gets a stable identifier that survives renames, refactors, and rewrites.
One requirement, bound to its implementation and tests across every repo in the platform.
Silent drops and contradictions block the merge before they reach production.
Verified, drift, broken, or unbound. Deterministic, never a guess.
Amendments mint versions and mark predecessors superseded. Full history, who and when.
Agents building on the platform stay on-spec instead of wandering off it.
If you decide what the product must do, or you have to prove it does, Spec Engine keeps everyone honest to it.
Prove what you built satisfies the requirement, without writing a status update.
Ship fast with an agent and still know the moment something quietly broke.
Hand off a codebase where every client requirement is traceable to the code that meets it.
Watch requirements stay true across every surface, long after the PRD goes stale.
Write a requirement once and see exactly where it lives in the product.
Know which requirements are verified by tests, and which only claim to be.
Requirements that outlive features. Drift caught before it ships. Agents that stay honest.