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Jake Fitzgerald

@earthtojake • 5,063 subscribers

teaching myself the full stack of robotics // situated @southpkcommons // https://t.co/5M2WJN6M9S https://t.co/Ie75SVuVwS

Shorts

fun experiment with gpt 5.6 sol: "create a vortex of lego bricks and assemble them into the millennium falcon" (this is animating a real step file of 7.5k bricks btw)

fun experiment with gpt 5.6 sol: "create a vortex of lego bricks and assemble them into the millennium falcon" (this is animating a real step file of 7.5k bricks btw)

188,922 views

The maniacs actually cut it sendcutsend

The maniacs actually cut it sendcutsend

640,476 views

asked claude fable 5 to design a 16dof articulated robot hand it also wrote a robot description file (urdf) for the hand ~ 1 hour / 300k tokens

asked claude fable 5 to design a 16dof articulated robot hand it also wrote a robot description file (urdf) for the hand ~ 1 hour / 300k tokens

315,394 views

asked claude fable 5 to design a qdd actuator it also animated the gearbox and inspected collisions as part of the validation loop ~ 30 minutes / 400k tokens

asked claude fable 5 to design a qdd actuator it also animated the gearbox and inspected collisions as part of the validation loop ~ 30 minutes / 400k tokens

324,914 views

Wild things happening in San Francisco this evening

Wild things happening in San Francisco this evening

377,343 views

new release for text-to-cad, an open source CAD harness and skills for codex / claude: - mechanism validation (go from text prompt to functional mechanical design) - parameters + animations for step files - extended sdf, srdf, urdf support 3k stars, 10k downloads, we cooking

new release for text-to-cad, an open source CAD harness and skills for codex / claude: - mechanism validation (go from text prompt to functional mechanical design) - parameters + animations for step files - extended sdf, srdf, urdf support 3k stars, 10k downloads, we cooking

253,624 views

Introducing step . parts, an open source directory of 12,000+ STEP parts for your next CAD project Many CAD tools like Autodesk have huge closed libraries of standard mechanical and electrical parts The goal is to build an equivalent catalog for the open source CAD community

Introducing step . parts, an open source directory of 12,000+ STEP parts for your next CAD project Many CAD tools like Autodesk have huge closed libraries of standard mechanical and electrical parts The goal is to build an equivalent catalog for the open source CAD community

96,013 views

animating mechanisms in codex might be the biggest nerd snipe of all time

animating mechanisms in codex might be the biggest nerd snipe of all time

53,243 views

this part was generated AND printed with one prompt using codex + text-to-cad: “Make me a thick Möbius strip, and use computer use to print on my Bambu Labs A1 Mini” went to the gym, came back 1.5 hours later and it was sitting on the build plate

this part was generated AND printed with one prompt using codex + text-to-cad: “Make me a thick Möbius strip, and use computer use to print on my Bambu Labs A1 Mini” went to the gym, came back 1.5 hours later and it was sitting on the build plate

15,175 views

a few hackernews folks commented on the text-to-cad repo's lack of benchmarks last week to my critics i present: pelican on a bicycle

a few hackernews folks commented on the text-to-cad repo's lack of benchmarks last week to my critics i present: pelican on a bicycle

12,092 views

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asked claude fable 5 to design a humanoid robot 2 hours and 1.4m tokens later, i got this absolutely insane
0:42
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asked claude fable 5 to design a humanoid robot 2 hours and 1.4m tokens later, i got this absolutely insane

Jake Fitzgerald

890,647 views • 1 month ago

fable, reverse engineer the spacex raptor 3 engine, make no mistakes
0:24
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fable, reverse engineer the spacex raptor 3 engine, make no mistakes

Jake Fitzgerald

38,889 views • 12 days ago

Vibe coding a robot with GPT 5.5! This is a URDF of a 7dof robot arm with functional kinematics, a custom gui, and STEP parts/assembly, 100% generated in Codex (minus the gripper). A similar result would have taken me weeks stitching half a dozen tools together. Insane stuff.
0:22
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Vibe coding a robot with GPT 5.5! This is a URDF of a 7dof robot arm with functional kinematics, a custom gui, and STEP parts/assembly, 100% generated in Codex (minus the gripper). A similar result would have taken me weeks stitching half a dozen tools together. Insane stuff.

Jake Fitzgerald

253,233 views • 2 months ago

weekend hack: implicit.js an open source library that lets agents generate CAD with code + mathematical functions representing surfaces no CAD kernels, no STEP files just agents using math + code to directly generate 3D models details below!
0:43
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weekend hack: implicit.js an open source library that lets agents generate CAD with code + mathematical functions representing surfaces no CAD kernels, no STEP files just agents using math + code to directly generate 3D models details below!

Jake Fitzgerald

34,761 views • 1 month ago

first stable release for text-to-cad (0.1.0) - bambu labs + gcode skills (prompt to print) - 3x faster STEP builds, 5x faster viewer - plugins for codex, claude, gemini - tonnes of new viewer controls - contributor friendly repo (!!) about to cross 5000 stars, 20k downloads
0:24
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first stable release for text-to-cad (0.1.0) - bambu labs + gcode skills (prompt to print) - 3x faster STEP builds, 5x faster viewer - plugins for codex, claude, gemini - tonnes of new viewer controls - contributor friendly repo (!!) about to cross 5000 stars, 20k downloads

Jake Fitzgerald

36,213 views • 1 month ago

Say hello to text-to-cad, an open source tool for generating 3D models in Codex! Prompt and edit complex 3D models. Export STEP, STL, GLB, DXF and URDF files. Built for CAD newbies. Link to github below. CAD is hard. As a software engineer getting back into robotics, I’ve been humbled by new tools like Onshape. Struggling to kick old habits, I started prompting Codex to generate 3D models and had some limited succes. After a few iterations I found a recipe that actually works: 1. Generate a python script for every STEP file. The agent can easily edit each part’s source without touching the raw STEP file. Use build123d > cadquery. 2. Reference specific faces and edges in prompts for precise edits. I built a basic local ui to inspect / cache STEP B-reps to make this easier. 3. Maintain markdown explaining important part features in plain English so the model can index on project context quickly. 4. Verify results with screenshots and geometry. Models don’t have great spatial awareness, but they can interpret images and verify constraints very well. For the best results I’ve been using GPT 5.4 xhigh / Opus 4.6+. Fair warning, this will burn through tokens, I recommend the Pro/Max plans if you’re planning on building anything serious. PRs welcome!
0:24
earthtojake's profile picture

Say hello to text-to-cad, an open source tool for generating 3D models in Codex! Prompt and edit complex 3D models. Export STEP, STL, GLB, DXF and URDF files. Built for CAD newbies. Link to github below. CAD is hard. As a software engineer getting back into robotics, I’ve been humbled by new tools like Onshape. Struggling to kick old habits, I started prompting Codex to generate 3D models and had some limited succes. After a few iterations I found a recipe that actually works: 1. Generate a python script for every STEP file. The agent can easily edit each part’s source without touching the raw STEP file. Use build123d > cadquery. 2. Reference specific faces and edges in prompts for precise edits. I built a basic local ui to inspect / cache STEP B-reps to make this easier. 3. Maintain markdown explaining important part features in plain English so the model can index on project context quickly. 4. Verify results with screenshots and geometry. Models don’t have great spatial awareness, but they can interpret images and verify constraints very well. For the best results I’ve been using GPT 5.4 xhigh / Opus 4.6+. Fair warning, this will burn through tokens, I recommend the Pro/Max plans if you’re planning on building anything serious. PRs welcome!

Jake Fitzgerald

52,444 views • 2 months ago

new text-to-cad release! - LOTS of robot demos (link below) - sendcutsend skill for DMF checks - sdf skill for sim - srdf skill with moveit2 support i want to give agents a complete set of skills to iterate towards mechanically sound hardware designs from loosely defined specs
0:26
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new text-to-cad release! - LOTS of robot demos (link below) - sendcutsend skill for DMF checks - sdf skill for sim - srdf skill with moveit2 support i want to give agents a complete set of skills to iterate towards mechanically sound hardware designs from loosely defined specs

Jake Fitzgerald

25,401 views • 2 months ago

step . parts is an open source directory of 12,000+ STEP parts for your next CAD project it's designed to be an agent-friendly, MIT licensed version of mcmaster that isn't behind a sign up / paywall the api has been used 10,000 times in ~2 weeks to download useful parts (a lot of them are me cadslopping) !!
0:22
earthtojake's profile picture

step . parts is an open source directory of 12,000+ STEP parts for your next CAD project it's designed to be an agent-friendly, MIT licensed version of mcmaster that isn't behind a sign up / paywall the api has been used 10,000 times in ~2 weeks to download useful parts (a lot of them are me cadslopping) !!

Jake Fitzgerald

15,907 views • 1 month ago

To generate 3D models in Codex with text-to-cad: Start a new project, write your prompt for a 3D model, and include a link to clone the text-to-cad repo. Codex handles the rest. The repo is open source and all scripts / ui run locally. Link below.
0:21
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To generate 3D models in Codex with text-to-cad: Start a new project, write your prompt for a 3D model, and include a link to clone the text-to-cad repo. Codex handles the rest. The repo is open source and all scripts / ui run locally. Link below.

Jake Fitzgerald

22,113 views • 2 months ago

Codex is SOTA at CAD
1:12
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Codex is SOTA at CAD

Jake Fitzgerald

21,657 views • 2 months ago

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