Engineering & Architecture

The Reactive Skills Blog

Technical deep-dives into Hierarchical State Machines, deterministic guarding, sub-second micro-decisions, and event-sourced agent architectures.

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The Reactive Agentic Runtime (2-Part Series)

From passive monolithic prompts to Hierarchical State Machines and sub-second semantic micro-decisions with TypeSafe Jev.

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Deep DivePart 2/2

2026-03-228 min read

Guarding the State Machine: Hexagonal Judgment and Sub-Second Micro-Decisions with TypeSafe Jev

Deterministic boolean checks verify tool exit codes, but state transitions often require semantic evaluation. Reactive Skills integrates a decoupled Ports-and-Adapters Judgment Engine with TypeSafe Jev to evaluate semantic criteria in ~400ms with circuit breaker fallbacks.

#Judgment Engine#TypeSafe Jev#Ports and Adapters#Circuit Breakers

Reactive Skills Core Team(Runtime Architecture)

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ArchitecturePart 1/2

2026-03-206 min read

Introducing Reactive Skills: Why Agent Skills Need Formal Statecharts

Flat prompt files force agents to manage complex engineering tasks in an unstructured context loop. Reactive Skills introduces a statechart runtime with scoped prompt slices, ancestor event bubbling, and deterministic guards.

#Runtime#Architecture#HSM#State Machines

Reactive Skills Core Team(Runtime Architecture)

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