open source durable workflows Smithers.sh | prev @Google @OPLabsPBC
Joined March 2011
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1/ Smithers is the best Orchestrator and you should try it
What is Smithers
Smithers is an Orchestration framework where you declaratively create a DAG of Durable Tasks as xml and reactively regenerate parts of that DAG as Tasks complete
How do you use it
You use it as a CLI or a agent skill. Your agent then writes, updates, and monitors those scripts
What special features does it have
- MDX for prompts
- Library of prebuilt 0-config workflows
- All workflows represented as code that is easy to modify, customize, or compose into larger workflows
- Built in observability with SQLLite and pormetheus
- Supports Claude code, Codex, Gemini, and Kimi subscriptions
- Supports all harnesses including Claude Code, Codex, Pi, and Opencode
- Supports Agent SDK
Why is it so good?
The main reasons Smithers is so good is
1. Agents are great at writing complex workflows because Agent's are great at React
2. It is thoughtfully built with @EffectTS_ Durable execution primitives enabling more reliability for very long running agentic tasks
3. Powerful CLI for watching and interacting with wrokflows
4. MDX is a really great existing standard for expressing prompts
5. The declarative nature of Smithers and it's great observability makes it very easy to read and quickly reason about
What is best way to get started?
bunx smithers init in an existing project and try it out
Alternatively check out the docs smithers.sh
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We always joke about how the best model is a Claudex. It is interesting to see a thing we already knew via vibes confirmed.
Introducing the Fusion API, the smartest compound model in the market.
Fusion achieves Fable-level intelligence at half the price.
How it works 👇
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Someone build this with Smithers
Introducing the Fusion API, the smartest compound model in the market.
Fusion achieves Fable-level intelligence at half the price.
How it works 👇
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It’s interesting how many features I shipped in Smithers months ago are becoming meta so suddenly
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I excalidraw a lot of concepts that go into context/harnes/loop engineering in this discussion
Jun 12
🎞️ full discussion: slop.computer/fucory
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Smithers did it smithers.sh/components/escal…
Jun 11
excited for the potential of running workflows across multiple providers. example:
try the task with a cheap model first, escalate to a smarter one each time it fails review. you only pay fable prices for fable-sized problems
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Smithereens mentioned
Jun 11
Boss, I'm tired.
I'm tired of trying to keep up with AI models, developing workflows and pipelines that are soon invalidated by improvements to AI coding agents, feeling like my career is just one AI advancement from smithereens.
You too? Join me. Learn **Durable Skills**.
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fucory retweeted
Jun 10
yup, it is on X and YT but right on slop computer is the best because you can connect your wallet and chat: slop.computer/fucory
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fucory retweeted
Jun 10
🎥 join us live with @FUCORY this morning
🐐 the GOAT of LOOPs will show us Smithers!
📆 starts in an hour (10 AM MT) x.com/i/broadcasts/1NGarreWb…
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Fable 5 is here
Everybody should have a model/harness agnostic smithers workflow they can run anytime a new model comes out to search for bugs before the bad guys do
Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use.
Its capabilities exceed those of any model we’ve ever made generally available.
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When I onboard people onto smithers (a loop orchestrator) in real life, the thing that most nerdsnipes them is the smithers examples folder
We did deep research for a day scouring internet for any and all orchestration examples we could find. If we saw the same thing twice, we included it
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Smithers now ships a jj binary per platform, so worktree snapshots and forks work with no system install.
JJ is how smithers delivers file system durability and time travel
A package manager pulls only the binary matching your host, and bunx smithers-orchestrator workflow doctor tells you up front when no usable git or jj is present.
5/ 🧵
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0.23.0 is the largest release since Smithers went public.
This thanks to 2 things
1. A growing community of contributors
2. Extremely high quality testing suite that allows us to move fast
Also inside:
• four new benchmark harnesses benchmarking smithers (SWE-Bench Pro, SWE-EVO, Claw-Eval-Live, RoadmapBench), Opus 4.8 implementing and Codex reviewing
• a defending-code example that finds vulnerabilities with AddressSanitizer
• a correctness sweep: JSON extraction, DevTools stream recovery, strict Codex schemas, the Pi plugin MCP bridge
See the full changelog including some exciting WIP features coming soon
6/ 🧵
smithers.sh/changelogs/0.23.…
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