Record an app's tool calls at their nondeterminism boundary; replay them deterministically against the real code. Tape format v1, shared with the Python implementation.

L1 — the only package permitted ambient access (time, randomness). Plugins and adapters may not import it, so injected Clock/id generators stay the only route to nondeterminism.

Add a pinch of chance to your code

ESLint rules enforcing workflow determinism for @adonis-agora/durable — flags non-deterministic sources (Date.now, Math.random, new Date, crypto.randomUUID, process.env), swallowed control-flow signals, and direct I/O inside workflow bodies. Part of the A

The describe-only TypeScript runtime for Ubiquex SDK programs.

ESLint rule: flag non-deterministic calls (Date.now, Math.random, …) inside a @Workflow run

TypeScript library and CLI for LLM evaluation, AI agent testing, prompt regression, RAG grounding, structured output, flakiness tracking, and CI gates.

Function-boundary VCR for testing code that calls an LLM: record real calls once, replay them deterministically, while your own tool execution and control flow keep running for real.

[](https://www.npmjs.com/package/@marianmeres/workflow) [](https://jsr.io/@marianmeres/workflow) [![License](https://img.shiel

Class-based hierarchical state machines and run-to-completion actors for TypeScript, designed for Deterministic Simulation Testing (DST) — Config, generated handles, promise services, zero dependencies

pi extension for fixed-task-set eval runs and prompt/system comparisons

ESLint rules for Juno flows and integrations

Ergonomic, typed TypeScript eDSL for MeTTa: term builders, tagged templates, host-interop builders, and auto-grounding of TypeScript values.

Disallow impure operations in utility modules

Make every incident byte-for-byte reproducible. A determinism harness for governed event streams.

FinVM — a universal deterministic register-based virtual machine.

Single source of truth for CNI v1.1 TypeScript types and JSON Schemas

🧊 Compile-time graph algorithms and state machine verification — Boost.Graph for TypeScript

Statistical parity gate for swapping AI models: sample every provider, fail CI only on certified regressions — with an honest "undecided" when your sample count can't prove anything.

Sound behavior-equivalence verification for JavaScript/TypeScript refactors, using your own tests for inputs (Selfsame Protocol implementation)