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HarnessBuilt by the founder

s3a-harness

Open-source MCP research-agent harness with human approval gates.

A Rust MCP server and agent harness with a path-confined sandbox, a read-only mode, and built-in 'ask a human' approval gates that reject unvetted actions. Part of the S3A storage project.

Disclosure: this project is built by the person who runs HarnessRack. It is listed with the same facts and source rules as every other entry.

Where it runsRuns locally
CostFree

Open source (Apache-2.0), free.

Good for: Bookkeeping, Content

Visit s3a-harness · Source: github.com

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