Is Harness Evolver safe and trustworthy?

tashan scores Harness Evolver on public evidence — tashan score 33.0/100, it is currently active, note: a single primary maintainer (bus-factor risk). Audit scope: OSV advisories, install-time scripts, build provenance and declared permission surface. We do not review source code or execute the capability.

How do I install Harness Evolver?

Configure it from its source repository — it is a remote / registry server.

Who maintains Harness Evolver?

1 GitHub contributors, source: raphaelchristi/harness-evolver.

‹ The Index

Harness Evolver

plugin

Autonomous LLM agent optimization using LangSmith. Spawns 5 parallel proposers in git worktrees, evaluates candidates via LangSmith experiments, and merges winners automatically. Includes evaluator agent (LLM-as-judge via langsmith-cli), critic, architect, and testgen agents. No external API keys needed beyond LangSmith.

Works with: Claude Code (native)
native: this artifact type is that client's own format

Install (Claude Code):

/plugin marketplace add anthropics/claude-plugins-community
/plugin install harness-evolver@claude-community

tashan score: 33.0
Adoption: 1 repos
Upkeep: 45.0
Freshness: 58.0
Evidence coverage: 84% of the inputs this score can use — the rest are unknown, and the score is discounted for it
Health: active
GitHub stars: 42
Contributors: 1
License: MIT

Security audit

Not scanned yet. We audit npm-published capabilities for known advisories, install-time scripts and permission surface; this one has no npm package we can resolve, or has not reached the queue.

You searched for one. Check the rest of your stack:

npx tashan-cli doctor

Reads the config already on your machine and names what is dead, deprecated or running code at install time. No account, nothing uploaded.

tashan Pro$6/mo

Harness Evolver scores 33 today. Pro keeps the series, so you can see whether that is a project getting better or one on its way down.

The whole series behind any row, back to the first day we measured it
The replacement, named — not just the news that something died
tashan doctor over your own config, on your own machine

Start a 7-day trial › Everything measured on this page stays free.

Show your score

Measured this well? Put the live badge in your README — it updates as the score does.

[![tashan](https://tashan.sh/badge/plugin-raphaelchristi-harness-evolver-harness-evolver.svg)](https://tashan.sh/capability/plugin-raphaelchristi-harness-evolver-harness-evolver.html)

source ↗ · plugin:raphaelchristi/harness-evolver/harness-evolver

Everything on this page is public evidence and free. What it cannot know is whether you run this — check your whole config, free, in the browser. tashan Pro adds the series behind each row and names a replacement for anything dying.

Already running this? Check your whole config — free, in your browser, nothing installed. Or npx tashan-cli doctor locally, which sends nothing at all.

Measured 2026-09-13 · scorer s5 · how · something wrong here?