T-saur (.tsr)

A free, open-source archive format and command-line archiver, written in Rust, for files that people and AI agents need to list, search, read and verify without unpacking them. Archives are content-addressed (BLAKE3) and deterministic; encryption with post-quantum recipients, signatures, offline N + M recovery volumes and a Model Context Protocol server are optional parts of the same binary. Format v1 is frozen; the software is at 1.0.0-rc.2 (1.0.0-rc.1 on crates.io (cargo install tsaur; library tsaur-core, https://docs.rs/tsaur-core); lite packages for the three systems on the Releases page (pre-release). Apache-2.0 OR MIT, no account, no service.

Repository and README: https://github.com/iulianbondari/t-saur

Start here

• Installing: cargo install tsaur, or building from source (Rust 1.87 or newer); lite packages from the Releases page.
• User guide: first archive, encryption, volume sets, transfers, reading without extracting, exit codes. Every command in it is executed before a release.
• The v1.0 contract: the nine promises, what is outside v1.0, the reader’s limits, verified platforms, what “verified” means.
• Design: what an AI agent needs from an archiver.

Format and security

• Format specification v1.0 (CC-BY-4.0; frozen).
• Security policy: what the reader guarantees, what the volume exchange guarantees, how to report privately.
• Distribution policy: lite and full builds, the LGPL component.
• Volume sets and the volume trust contract.

Verification and provenance

• Review package for an independent evaluator and the producer’s reports: Windows, Linux, robustness campaign. No independent review has taken place yet.
• Provenance of the published repository and the release process.
• Two-device benchmark plan.

Project

Roadmap · Changelog · Authors and provenance · Contributing · Third-party notices