Logion

What Logion does

Logion addresses the gap that skill and plugin hubs publish provenance and popularity but not whether an artifact works. It resolves which exact version an agent installed, whatever the source (npx skills, a plugin manager, Hugging Face or a bare git clone), and attaches evidence to that version. It attributes results and does not replace your installer. This repository is the client surface, meaning the SDK, CLI and agent companion, and not the platform itself.

Answers are shown in labelled layers instead of one blended score: controlled evaluation reproducible from a pinned contract, static evidence such as scanner results, permissions, license and provenance, field evidence reported by real agents above a minimum cohort size, and an explicit nothing yet. A measurement is pinned to an exact version, content digest, contract digest, evaluator version and environment digest, belongs to a model and harness pair, and must reproduce at least twice before it is called a finding.

Key features

• Measurements pinned to an exact artifact version, content digest and contract digest
• Answers split into controlled evaluation, static evidence, field evidence and nothing yet
• Results tied to a model and harness pair
• Works regardless of how the artifact was installed
• Authors contacted before publication, with rebuttals published at the same URL

When to use it

• Checking whether an installed skill or MCP server has been measured against a reproducible contract
• Attaching evidence to an exact artifact version inside an agent workflow
• Reviewing the method and limits behind a published result before trusting it

Who it is for: Developers and agent users who install third-party skills, plugins, MCP servers or models and want evidence of how they behave.

How it fits with Hermes Agent

A general registry tool that covers several agent ecosystems; the repository carries hermes and hermes-skill topics, but the opening part of the README describes no Hermes-specific integration.

Note: The README says this repository is the client tooling rather than the platform, and that Logion is currently the only issuer of its own measurements.

FAQ