Show HN: A single-use authorization boundary in Rust

Category: security

Tags: authorization, security, rust, single-use, file-based, experimental

Score: 4.3/10 (Innovation: 4, Technical: 4, Documentation: 6, Utility: 3)

An experimental Rust implementation of a single-use authorization boundary to prevent unauthorized side effects from untrusted producers. It uses file-based atomic claims to enforce at-most-once actuation, with tests and a Windows authority-boundary experiment. The project is highly specific and self-bounded, exploring a narrow security question rather than general production use.

Target audience: security engineers, systems programmers

Repository: https://github.com/trencinodin-stack/arcstone-mcp-sidecar · Rust · Apache-2.0

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