rulsynor-core v1.0 Launches as Open-Source Audit Engine for AI Agents

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OpenOBA has released rulsynor-core v1.0, an open-source guard engine designed to make AI agent decisions cryptographically traceable and independently verifiable. Available on npm under the MIT license, the tool evaluates every tool call before execution using 30 preset rules and supports seven decision types, including ALLOW, DENY, and EMERGENCY_HALT. Each decision generates a 25-field cryptographic audit record using JCS and SHA-256 hashing, forming a tamper-evident chain that anyone can verify without the SDK. The project has been third-party tested with 101 cross-implementation vectors, all 13 test categories passing. rulsynor-core is framework-agnostic and compatible with LangChain, MCP, and custom ReAct loops, with a community rule marketplace planned on the roadmap.

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