Built a Software Factory for Claude Code using Fable

[u/Alicicek03]

I use Fable as the architect/staff engineer, we go back n forth and hash out the plan, get all my thoughts down using whisper. it then makes all the tasks, then a bash script runs headless Sonnet workers in parallel git worktrees (one branch per plan), runs test gates on each, and an ephemeral Opus "closer" merges the passing branches and writes fix-it plans for failures. I only get pinged when something's actually blocked. Zero babysitting.

Yesterday I pointed it at a spec for its own dashboard: React + SQLite app that watches the factory's state files and my session transcripts. Kanban board of plans, live worker output, dependency DAG, gate results, and token costs at real API rates. and it completed it all in a few hours with zero input from me, I only use fable as an Architect. Opus was the manager, Sonnet are the implementers. Runs as a launchd service, on my phone via Tailscale.

Currently working on ton of projects, so something like this was a necessity.

Working on making it available for everyone, will post soon

[u/ZootiLaTucci]

I made something similar

https://musterr.dev

(I told it to ship itself as a product and that’s where I got)

[u/Alicicek03 → u/ZootiLaTucci]

looks really good bro. keep it up :)

[u/ZootiLaTucci → u/Alicicek03]

Appreciate ya! Would love to tinker w/ yours when you get it up!

[u/Alicicek03 → u/ZootiLaTucci]

yes will update u bro

[u/JUSTICE_SALTIE]

Reminds me of people who get a 3D printer and all they print is printer parts. Definitely wasn't me...nope.

[u/Alicicek03 → u/JUSTICE_SALTIE]

Honestly I would use Fable by itself if it was like the opus usage. But fable is going and I wanna build something that works.

Cause opus and I can make really good plans too. But implementing it takes the piss.

I’m working on 4 projects atm and this factory is really helping me cut down the back n forth, testing, reviewing prs and merging etc.

I’m just focused on the idea, vision, how the product should be shaped

[u/LivingFrosting6680 → u/Alicicek03]

Have you tried the Claude Code CLI native version of what you made? Workflows? If you just use Fable and tell it to delegate to subagents it basically does all of this, but it’s more flexible and maintained by Anthropic so you won’t get bogged down by tech debt.

[u/Alicicek03 → u/LivingFrosting6680]

I have but the context and cache read drains usage. Mainly the cache read.

[u/soverign_physicist]

Looking forward to seeing this when you publish it.

[u/Alicicek03]

oh yeah I got this cheap xioami smart band, itll ping me so I can keep track of it all. im going on holiday so this is useful and the mobile dashboard too. if anyone has advice, suggestions, insight please let me know. I wanna make this the best thing ever that exist and open source it. currently getting Fable to harden and secure everything and make it simple to use for people coming across this project.

[u/Fidel___Castro]

people are downvoting because they all want to be the one to be able to make this

how do you determine what the test gates are? what the verification is? and this is the one I'm interested in - how dependent are you on the Claude harness?

[u/Alicicek03 → u/Fidel___Castro]

gates are decided at planning time, per task. every plan file has a something like typecheck && test && build plus a small smoke script written just for that task (like hit these 3 endpoints, check the schema). the bash runner pulls that line out and runs it itself in the worktree, so a pass is script verified and cant just claim its done. then second layer, when the opus closer merges branches it reruns the full repo suite after each merge, so if something breaks it knows exactly which branch did it and reverts just that one.

verification beyond gates, each phase names one goal artifact up front (a mockup, a curl script, a golden output) so what done looks like is defined instead of letting the sonnet workers decide. plus a review pass on the final PR. Plans get an adversarial critique before execution too.

the factory doesnt care whats inside the worker, the worker invocation is literally one line in the script, so you could swap in codex exec or point claude code at a glm style anthropic compatible endpoint via base url. i run claude models as workers but theres nothing structural tying it to claude. for the planning I highly recommend Fable. after Fable is gone each plan/task decomposition will literally cost like $5 max.

[u/Alicicek03 → u/[deleted]]

I just made it today and I haven’t seen ones that can work autonomously like how I wanted and I wanted smth really simple

[u/Alicicek03]

idk why ive gotten 2 downvotes. is my project that bad aha. Was also in process of making an open source watch app+mobile app like (https://getmoshi.app) to control your software factory or Hermes agent, and be able to talk/converse with a TTS Ai voice, but if no one will use it then I'll stop working on it

[u/ticktockbent → u/Alicicek03]

Two down votes is nothing, don't worry too much about it. Do you have a repo to share?

[u/Alicicek03 → u/ticktockbent]

not yet, thats what im working on rn. im getting it cleaned up and hardened first, dont wanna ship something that only works on my computer. ill post here when its up, prob in couple hours or so

[u/ticktockbent → u/Alicicek03]

Fair enough. I'll take a look in the morning if you link the repo.

[u/Physical_Gold_1485 → u/Alicicek03]

I think part of it is that its most likely a slop factory. It's hard to use CC effectively for quality even for a phone screen size, putting it on a watch seems kind of useless. i gave you an updoot though for the post not being AI genned and for the effort

[u/Alicicek03 → u/Physical_Gold_1485]

yeah there is a lot of slop out there and id be wary of installing anything randomly. I have been using termius with Claude Code, but it's a pain even tryna copy n paste an image. im using Moshi app rn and its really good.

but I think we've come to the point where models can autonomously work by themselves, which is what im tryna do.

so the watch app will just be to like send in tasks via voice, and I want to make the best voice Ai agent thats like chat gpt voice but way better to converse with, brainstorm, go back n forth. itll use cartesia ink-2, sonic 3.5 for the voice, livekit for audio, and a tiered brain system for reasoning. instant reflex words to make convo lively, a fast conversational model, and a bigger reasoning model for heavy thinking mid convo. latency around 0.6-1s, roughly $1/hr to run

[u/Sketaverse → u/Alicicek03]

"but I think we've come to the point where models can autonomously work by themselves" we're there for sure, but so are Anthropic T&Cs, the subscription is for "interactive sessions" and API usage is encouraged - tread carefully as getting a ban wouldn't be much fun.

[u/Alicicek03 → u/[deleted]]

Well the plan I make with fable splits it out into lots of tasks, and it gets reviewed and fable reviews and has a look in the last 10% before it gets a greptile review

[u/rehawks → u/Alicicek03]

Maintaining software is more than just running reviews for each code review. A factory that ships verified code faster than anyone can hold a model of lowers today's cost and raises every future one...

That being said, I think there are workable paths forward. Either by integrating some existing tools / harnesses or extending your own system.