Open sourceTypeScript · ≈15k stars · AGPL-3.0
Trellis
A self-described agent harness adding specs, task PRDs and workflow gates around coding agents.
Trellis is a project layer that works across multiple coding agents and IDEs (e.g. Cursor, OpenCode, Codex), installed via npm and initialized per repo. It runs a four-phase loop with auto-invoked skills and sub-agents: brainstorm a PRD one question at a time, implement with curated context injected, check the diff against specs plus lint, type-check and tests, and finish by promoting learnings into versioned `.trellis/spec/` files. It adds scoped specs, task boundaries, workflow gates and per-developer workspace journals, and `trellis ablate` temporarily removes its files for comparison. Licensed AGPL-3.0.
Neighbours on the workbench
MDX · ≈307k stars · MIT
obra/superpowers
An agentic skills framework and software methodology that works.
Maintained by Jesse Vincent (obra)
Shell · ≈306k stars · MIT
mattpocock/skills
Small, composable agent skills for real engineering work.
Maintained by Matt Pocock (AI Hero)
JavaScript · ≈292k stars · MIT
affaan-m/ECC
Agent harness performance optimization system: skills, instincts, memory and security for coding agents.
Maintained by Affaan Mustafa
Connections
Relations from the Harness Hub knowledge graph, as charted in the State of Harness reports.
Maintained by · 1
- MindfoldOrganisation
Built on · 1
- CodexProject
Sources
Verified Oct 29, 2026