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Arti 2.5.0 released: Stable Counter Galois Onion

Chimera readability score 59 out of 100, Graduate reading level.

Arti is our ongoing project to create a next-generation Tor implementation in Rust. We're happy to announce the latest release, Arti 2.5.0.
This release marks Counter Galois Onion as a stable feature and includes it in full feature builds. Likewise, Congestion Control is now enabled in default builds of Arti, increasing the overall speed without any further configuration.
Unfortunately, this release also comes with the disclosure of two medium-severity DoS security issues, TROVE-2026-024 as well as TROVE-2026-027, whose fixes are of course included within the release.
Additionally, this release continues our ongoing development towards using Arti as a relay and as a directory authority.
Another noteworthy change is that we've increased our minimum supported Rust version to Rust 1.91, released in October 2025.
Of course, this release also contains a number of bugfixes, cleanups, and improvements throughout various parts of the code base.
For full details on what we've done, including API changes, and for information about many more minor and less-visible changes, please see the CHANGELOG.
For more information on using Arti, see our top-level README,
and the documentation for the arti
binary.
Thanks to everybody who's contributed to this release, including 5225225, Neel Chauhan, hjrgrn, moumenalaoui, pryty26.
Also, our deep thanks to our sponsors for funding the development of Arti!
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Sentinel — Human

Confidence

This content displays strong indicators of human authorship, characterized by specific technical details and adherence to community-standard formatting practices.

Signals Detected
low severity: Sentence length variance is natural; the text transitions smoothly between technical details and acknowledgments without mechanical rhythm.
low severity: The text flows logically as a typical project release announcement. It contains specific, non-generic data points (version numbers, specific security IDs) that suggest authentic source material.
low severity: No obvious boilerplate phrasing or machine-like repetition; the structure is dictated by typical open-source release conventions rather than an LLM template.
low severity: The specific reference to version numbers, bug IDs (TROVE-2026-024/027), and contributor names indicates highly specific, verified content that is difficult for an LLM to generate without explicit input.
Human Indicators
The text contains highly specific technical data (version numbers, bug IDs, contributor names) typical of direct human contribution and documentation.
The overall structure adheres strictly to the conventions of an open-source software release announcement.