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@purista/harness

v1.1.0

Published

Self-hosted enterprise agent harness for typed tools, agents, workflows, state, sandboxing, and telemetry.

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Git

Maintainers

sebastianwesselsebastianwessel

Keywords

Readme

@purista/harness

Self-hosted enterprise agent harness for typed tools, agents, workflows, state, sandboxing, streaming, and OpenTelemetry instrumentation.

The core package also exports provider-neutral eval helpers:

  • evaluatePromptCandidates(...) compares prompt candidates against a fixed item set and deterministic or custom scorers.
  • evaluateDeterministicScorer(...) runs JSON Pointer based deterministic scorer definitions without provider calls. It is exported from the main package and re-exported from @purista/harness/testing.

Telemetry defaults to dual GenAI and OpenInference attributes with no content capture. InvokeOptions.traceparent and tracestate accept inbound W3C Trace Context so application traces can parent harness run spans.

See Evaluating Prompts for the execution model, scorer limits, and privacy behavior.

Install

npm install @purista/harness

Optional peer dependencies:

  • @modelcontextprotocol/sdk enables MCP stdio/http tools.
  • just-bash enables the exec-capable bash sandbox.
  • @opentelemetry/api connects harness spans to an existing OpenTelemetry context.

Package Format

This package is ESM-only and ships compiled JavaScript plus TypeScript declarations from dist/. Source files, tests, source maps, and local configs are not included in the published package.