harnessgym
PulseGate's liveness check found it on 14 Sep 2026; it is registered on GitHub and PyPI and has been in the index since 1 Jul 2026. How this is checked
harnessgym is an open-source CLI framework for benchmarking, testing, and improving agent harnesses for AI code agents such as Codex. It supports iterative improvement, MCP, and is designed for AI researchers and developers.
Inferred · not functionally tested
Overview
6 featuresPurpose: Providing a framework for benchmarking and improving agent harnesses for AI code agents like Codex.
Inferred · not functionally tested
Audience: AI researchers and developers
Inferred · not functionally tested
Functions: agents, code_generation
Inferred · not functionally tested
Interfaces: API: unknown · MCP: indicated (inferred, not tested) · CLI: indicated (inferred, not tested) · Self-hosting: indicated (inferred, not tested)
Recorded constraints: pricing: open_source · license: Apache-2.0 · platforms: CLI · deployment: cli, self_hosted
Constraint provenance is unknown; confirm requirements with the publisher.
Record sources: pypi.org · github.com. These links do not verify the individual claims.
harnessgym is an Agent evaluation & testing project. Inferred · not functionally tested: It focuses on providing a framework for benchmarking and improving agent harnesses for AI code agents like Codex. Inferred · not functionally tested: harnessgym is an open-source project aimed at AI researchers and developers. Basis unknown · not verified: harnessgym is open source under the Apache-2.0 license. Basis unknown · not verified: harnessgym is available on the command line, and it can be self-hosted.
patrick-toulme builds and maintains harnessgym, and it first shipped in 2026. Development happens publicly on GitHub with 25 stars and 1 commit in the last 90 days. Inferred · not functionally tested: Among its 6 catalogued features are agent benchmarking, codex integration, and MCP support. Basis unknown · not verified: Catalogued interfaces include an MCP server.
Summary written by a language model from the project’s public pages.
Tasks: Inferred · not functionally tested
- Agent benchmarking
- Codex integration
- MCP support
- Testing framework
- Open source
- Iterative improvement
Topics: Inferred · not functionally tested
Built with & integrations
Trust & compliance
Indexing history
What PulseGate has recorded for this listing
Frequently asked questions about harnessgym
- What is harnessgym?
- Inferred · not functionally tested: Harnessgym focuses on providing a framework for benchmarking and improving agent harnesses for AI code agents like Codex. It is catalogued under Agent evaluation & testing on PulseGate.
- Who is harnessgym for?
- Inferred · not functionally tested: harnessgym is an open-source project built for AI researchers and developers.
- Does harnessgym have a free plan?
- Basis unknown · not verified: Yes — harnessgym is open source under the Apache-2.0 license and free to use.
- What platforms does harnessgym run on?
- Basis unknown · not verified: harnessgym runs on the command line. It can also be self-hosted.
- Is harnessgym still active?
- PulseGate's liveness check found it on 14 Sep 2026. Its GitHub repository shows 1 commit in the last 90 days.
- What are alternatives to harnessgym?
- Similar projects tracked by PulseGate include harness-arena, Harness Optimization, and Agent Harnesses.harness-arenaHarness OptimizationAgent Harnesses
- Who develops harnessgym?
- harnessgym is developed by patrick-toulme.
- When did harnessgym launch?
- harnessgym first shipped in 2026.
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