alt.hn

2/6/2026 at 12:58:31 AM

Show HN: Horizons – OSS agent execution engine

https://github.com/synth-laboratories/Horizons

by JoshPurtell

2/6/2026 at 1:17:44 AM

Fascinating platform. The API surface is much richer than I would have expected. Ooc, at what size do you think teams typically have use for this? I imagine you have to be running quite a few agents at scale before there's a strong usecase.

by skeptrune

2/6/2026 at 1:26:08 AM

Just like codex or opencode provide strong oss implementations of the core agent loop, our ambition (not achieved! hoping this is a solid start) is to provide a solid oss implementation of the context updating loop, memory, basic database + a backend sync layer. And evals + continual learning + gepa optimization.

Just like everyone can write their own agent, yet many opt for codex/claude code sdk/opencode, we think that at some point in our journey, many will also opt for standard implementations of these patterns, for projects big or small.

Realistically, though, the case for a standardized environment grows a lot stronger when you have multi-agent, permissioned actions, and generally just a lot more state than what you can get away with using only opencode + some glue. Insofar as big teams have ambitious products, they might be more likely to try it

by JoshPurtell

2/6/2026 at 4:59:28 PM

Really cool project, it looks really useful. We’re moving past manual prompt optimization and considering different options for tuning long horizon tasks. We will likely go with Horizons

by Shindi

2/7/2026 at 3:40:21 AM

Not really OSS though

by Nikkau

2/7/2026 at 4:26:58 AM

Why, because of the Sentry license?

by JoshPurtell