Tools & Runtimes for Stateful Systems

State machines you can design, verify, and operate — at scale.

Cognitive Fab builds the tooling and runtimes behind sophisticated state machines: the workflows, business processes, and control systems that real operations depend on. Designed rigorously. Verified continuously. Operated with confidence.

Introducing Polygraph

Verify, don't review.

A verification-gated lifecycle for the code AI agents now write. Generation is solved — trust is the bottleneck. Agents already write large amounts of stateful code, the kind hardest to get right, and no human can enumerate every reachable state by eye. The dangerous bugs hide in combinations nobody tested.

Review — today

  • A human reads the diff
  • Samples the cases someone imagined
  • Misses combinatorial defects

Trust by hope

Verify — Polygraph

  • A deterministic gate runs on every change
  • Explores every reachable state exhaustively
  • Every bug arrives with its reproduction

Trust by construction

Five engines, one gate

Plugins to a coding agent. Every step the agent takes, a deterministic gate checks — no model needed at check time.

polygen

Authors code that is checkable from the first line.

  • Drafts the contract
  • Self-repairs to its checks
  • Synthesizes a regression corpus
polynv

Elicits the rules by having you judge concrete scenarios.

  • Harvests candidate rules
  • Grades them by mutation
  • You own every disposition
polyrun

Executes verified machines durably.

  • One commit per step
  • Effects emitted once
  • Check-effects composition gate
polygraph

Audits code that already exists, against reality.

  • Generates independent specs
  • Replays real traces
  • Model-checks the survivor
polyvers

Evolves live machines safely.

  • Classifies the change
  • Seeds the live fleet
  • Gates deploy on the verdict
100%

of developers need to check the code they write with AI — not review it by eye, but gate it, automatically, on every change. Generation raced ahead; shipping, where trust lives, barely moved.

Where stateful code lives

Anything that occupies a situation and moves between them on events is a state machine — whether or not anyone drew it as one. It is the hardest software to get right, and it is everywhere.

🗂️ Business workflow

orders, billing, subscriptions, approvals

🔬 Semiconductor mfg.

tool & process control

⚙️ Industrial control

SCADA, PLCs, factory automation

🤖 Robotics

motion planning, task sequencing

🚗 Autonomous vehicles

perception → decision → actuation

✈️ Aerospace & flight

flight control, avionics modes

🩺 Medical devices

infusion, imaging, therapy modes

💳 Payments & finance

settlement, ledgers, trade lifecycle

📡 Telecom & protocols

call state, session & consensus protocols

⚡ Energy & grid

grid control, battery & plant management

🚚 Logistics & supply

fulfillment, routing, inventory

🔌 Embedded & IoT

…and everything with a “mode”

Rigor from design to operations

Most systems bury their state machine in code, where it can't be inspected, verified, or safely evolved. We make it a first-class artifact across its whole lifecycle.

Design

Model states, actions, and transitions explicitly — with contracts and invariants that capture what the system must and must never do.

Verify

Check machines against their contracts before they ship: reachable-state analysis, invariant checking, and replay of real traces against the model.

Operate

Run fleets of machines with visibility into every instance's state, safe version migrations, and compatibility gates for every change.

Evolve

Change a live system without breaking it — versioned machine definitions, validated migrations, and gates that catch incompatibilities before deployment.

Building something stateful?

We'd like to hear about it. Reach out to talk tools, runtimes, or the state machines behind your operations.