Version Packages

[hash-release]

This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated.

Releases

@hashintel/petrinaut@0.0.19

Patch Changes

• Updated dependencies:
  • @hashintel/petrinaut-core@0.0.4

@hashintel/petrinaut-core@0.0.4

Patch Changes

• Fix stochastic transition firing statistics: fire with the memoryless per-frame probability 1 - e^(-rate * dt), advance the RNG state on every evaluation instead of discarding non-firing draws, and compute the seeded LCG with exact integer arithmetic. Firing counts now match Poisson expectations. Identical seeds produce different sequences than earlier releases. (@kube, #9329)

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Project	Deployment	Actions	Updated (UTC)
hash	Ready	Preview	Aug 25, 2026 4:59pm
hashdotdesign-tokens	Ready	Preview	Aug 25, 2026 4:59pm
petrinaut	Ready	Preview	Aug 25, 2026 4:59pm
petrinaut-docs	Ready	Preview	Aug 25, 2026 4:59pm

[cursor]

PR Summary

Medium Risk
Changes core stochastic simulation and RNG semantics; reproducibility across versions is intentionally broken, which can affect optimization runs and tests that depend on fixed seeds.

Overview
Automated Changesets release that publishes @hashintel/petrinaut-core@0.0.4 and bumps @hashintel/petrinaut@0.0.19 to pick up that dependency.

The core patch (from #9329) corrects stochastic transition firing in the simulation engine: numeric rates use the memoryless per-frame probability 1 - e^(-rate * dt), the RNG advances on every enabled evaluation (including non-fires), and the seeded LCG uses exact Math.imul integer arithmetic in seeded-rng.ts. Firing counts should align with Poisson expectations, but the same seed no longer reproduces prior release sequences.

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