Tools, grouped by
what you came to do

Each one plugs into a coding agent or reads what it did, and all but one run a deterministic check, with no model call at check time. Start where your problem is: the code an agent writes, what your agents already know, what an agent is allowed to do, or the outcome you are designing toward.

Verify the code

The SAM v2 gate

Six tools in one lifecycle around one deterministic gate — they run in order, and each hands the next an artifact rather than a claim — a seventh that draws what any of them produced, and an eighth that watches each Claude Code turn as it happens.

polynv→polygen→polygraph→polygate→polyrun→polyvers
polynvelicitDesign The invariants a system must never break — harvested from the machine's own vocabulary, graded by mutation, confirmed by a human rather than invented by a model. open source polygenauthorDesign Authors new state machines that are checkable from the first line — contract and implementation drafted together, self-repaired, shipped with a regression corpus. open source polygraphauditVerify The verification engine. Explores every reachable state over declared domains and returns the shortest action sequence that breaks your rules. open source polygategateVerify The CI/CD merge gate. Keyless replay, model checking and compatibility gates on every merge request, so unverified changes never reach a protected branch. open source polyrunexecuteOperate Durable execution for verified machines — one commit per step, effects emitted exactly once, and a gate on the check-then-effect sequence itself. open source polyversevolveEvolve Checks whether a version change is safe against the live fleet before it deploys — classified, seeded against real in-flight state, gated on the verdict. open source polyvizdrawevery stage Renders verification artifacts as diagrams. Same inputs, byte-identical SVG, no model call at render time. open source polywatchcatch the bugs Claude writesOperate A Claude Code plugin that reviews every change in the background. A cheap reviewer lists claims, Opus 5.5 checks the most serious against the code, and you see at most two findings on your next prompt. The one tool here that calls a model at check time. open source
Capture expertise

What your agents already know

Rules mined from the record your agents already produce, approved by a person, and served before the agent acts. Getting-started pages →

Govern the agent

What an agent is allowed to do

The same substrate pointed at a different question: not “is this call acceptable?” but “can this session ever reach a situation it must never be in?” The argument, the tools and the reading in one place →

Design the outcome

Before anyone writes code

Not a tool — Polytrion

Our digital-twin design platform is a separate line of work, and it is not something you install. It runs as a hosted platform in soft launch, by invitation. See what it does →