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A tiny agent runtime, composable with plugins
Joined March 2026
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Bub 0.4.4 is out.
- sidecar hook, with spill on it.
- one-line install with presets, gateway as a user service.
- Agent Plugins, portable skills and MCP drop in.
- FrontierHarness eval: thanks @guanlan for @runta credits, and @yihong0618 for @Kimi_Moonshot K3 API.
thread ↓
check the evaluation of Bub at commit eccbf7c against the 30-task FrontierHarness Eval set.
github.com/frostming/bub-har…
install picks a preset, then you can park the gateway as a user service.
recommended already includes Agent Plugins. drop a plugin.json pack in .agents/plugins/ and it loads.
bub.build/docs/tutorials/age…
bub-acp-server now speaks more than stdio.
HTTP, HTTPS, and WebSocket at /acp.stdio still default; gateway can host it.
bub.build/docs/tutorials/acp…
sidecar is a sibling tape with the same lifecycle as the session.
spill is the first builtin on it: oversized tool results leave the main tape, come back through spill read tool .
tape.systems now has the sidecar picture.
we ran it too.
Bub + K3, current master: 19/30.
as far as we know, the only #Python harness that finished the suite.
tiny hook-first runtime. come build your own #Bub .
joining in 🤗
any merged PR in:
@bubdotbuild · DeepChat · @lody_ai · @OomolStudio · Proma · @NowledgeMem
quote the original to claim your
Open Source Contributor Pack
A small thank-you to the open-source contributors who have been on this journey with us 💙
From Sep 13–16, quote this post with a PR that was merged before the campaign into any Bub, DeepChat, Lody, OOMOL, Proma, or Mem/Con repository to claim an Open Source Contributor Pack.
It can be your first merged PR or a contribution that left a lasting impression on you.
After quote-posting, remember to DM us to claim your pack.
Every open-source journey deserves to be remembered.
Don’t miss @lody_ai , now open source and ready to work with me via the bub-acp-server plugin.
Lody is a shared workspace for the coding agents your team already uses.
The CLI and local desktop are now open source!
lody.ai/blog/lody-is-now-ope…
Bub 0.4.3 is out.
This release refines streamed CLI output, adds a continue-prompt hook, improves unknown tool-call recovery.
Also: 0.4.2 quietly shipped reasoning-effort management and customizable completion call options.
#AIAgents #OpenSource #Bub
bub × #deepseek harness = 🔥
so, u can find a bub plugin for dsh
github.com/bubbuild/bub-cont…
Nowledge Mem holds #Bub 's important memories 🤗
This open source project connects Slack, @bubdotbuild, and Nowledge Mem.
Messages in channels with the bot are saved to Mem automatically. When someone needs an answer, they can ask the bot right in Slack using that shared context.
Thanks for building and sharing this, @HaraAmami!