Ax

DSPy-style toolkit for typed LLM signatures, agents and flows, TypeScript-first with Python, Java, C++, Go and Rust libraries.

Harness by Ax

IndexedApache-2.0★ 2,969

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npm install @ax-llm/ax

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About

Ax lets you declare typed LLM signatures as a string DSL, a fluent builder or Standard Schema validators such as Zod, then run them against many model providers by changing a name. It includes agents with runtime execution and delegation, flows built as typed program graphs, and optimizers such as GEPA and few-shot bootstrapping. TypeScript is the source implementation, and generated Python, Java, C++, Go and Rust libraries share the same program model.

Use cases: prompt-engineering, agent-orchestration

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Fact sheet

Languages: TypeScript, Python, Java, C++, Go, RustREADME
Packages: @ax-llm/ax (npm), axllm (pypi), dev.axllm:ax (maven), axllm (cargo), github.com/ax-llm/ax/packages/go (go)README
Multi-agent: YesREADME
Orchestration: graphREADME
Model providers: openai, anthropic, google, meta, deepseek, xai, together, fireworksREADME
Maturity: Stablegithub.com

Facts extracted by Claude Haiku 5.5 from the linked sources on Oct 24, 2026. Wrong fact? Tell us.

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Featured in

Signals

Stars: 2,969
Forks: 199
Open issues: 8
Weekly downloads: 27,168
Last commit: Oct 21, 2026 (9 days ago)
Last release: Oct 21, 2026 (9 days ago)
Last package publish: Oct 21, 2026 (9 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Packages: npm @ax-llm/axpypi axllmmaven dev.axllm:axcargo axllmgo github.com/ax-llm/ax/packages/go
License: Apache-2.0
Repository: github.com/ax-llm/ax
Website: axllm.dev
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: README github-graphql

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Cite this page

Ax. Agent Mart. https://agentmart.dev/harnesses/ax (last updated 2026-10-24)