By MaxGfeller
open harness
A code-first, composable SDK to build powerful AI agents
Filed under Agent Frameworks. Status: Published
- Stars
- 540
- Forks
- 92
- Open issues
- 0
- Last commit
- 1mo ago
- Stats refreshed
- Refreshed Jun 1, 2026
On the maker
Use cases
API-First, Tool Use / Function Calling.
- API-FirstTools whose primary interface is a REST or gRPC API with multi-language SDKs.
- Tool Use / Function CallingTools that support OpenAI-style function calling, MCP tool use, or structured tool dispatch.
Pricing
Open-source
Field notes
No field notes yet.
Field notes for open harness will land here when sources support a confident take ; synthesized from postmortems, vendor retros, dev-team blogs, deeply-engaged GitHub issues, and our own builds.
Coverage isn’t promised on every tool ; empty sections are honest. Field notes are curated, not generated from vendor copy.
Benchmarks
Scores aren’t in yet.
We’re wiring up SWE-bench, Aider Polyglot, and a custom dev-task suite next. Methodology will be public; vendor pre-notification is 48 hours.
View benchmarksHow we make money
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