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Jake Fitzgerald

@earthtojake • 6,296 subscribers

teaching myself the full stack of robotics // situated @spc // https://t.co/xmoQjORRPU

Shorts

The maniacs actually cut it sendcutsend

The maniacs actually cut it sendcutsend

640,679 views

opus 5 ultracode with text-to-cad and a gauntlet loop 1 prompt, 1500+ car parts generated, including a suspension system and v12 engine

opus 5 ultracode with text-to-cad and a gauntlet loop 1 prompt, 1500+ car parts generated, including a suspension system and v12 engine

126,941 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

326,262 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

318,690 views

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)

191,109 views

Wild things happening in San Francisco this evening

Wild things happening in San Francisco this evening

377,925 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

255,244 views

Fable 5 designed a completely functional mechanical watch in CAD Inspired by the Omega Speedmaster Professional, the "Moonwatch" that NASA astronauts wore on the Apollo missions Claude is still the king of CAD

Fable 5 designed a completely functional mechanical watch in CAD Inspired by the Omega Speedmaster Professional, the "Moonwatch" that NASA astronauts wore on the Apollo missions Claude is still the king of CAD

28,084 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

96,456 views

asked claude fable 5 to design spacex starship with mechazilla it modelled the first stage boosters and even animated a chopstick catch at the end absolutely insane

asked claude fable 5 to design spacex starship with mechazilla it modelled the first stage boosters and even animated a chopstick catch at the end absolutely insane

51,787 views

new text-to-cad release: - support for large assemblies - lots of fun new visualization tools - new .step.py format (CAD as code, saves disk space) - 20x faster builds - 3x faster renders oh and you can one-shot F-14D super tomcats

new text-to-cad release: - support for large assemblies - lots of fun new visualization tools - new .step.py format (CAD as code, saves disk space) - 20x faster builds - 3x faster renders oh and you can one-shot F-14D super tomcats

19,620 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

53,281 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

12,157 views

Inverse kinematics and path planning done! Codex basically one shotted this again. It's using ros2/moveit2 which does a lot of the heavy lifting and should generalize well to other embodiments. Will push to text-to-cad soon. Next step IRL assembly and testing!

Inverse kinematics and path planning done! Codex basically one shotted this again. It's using ros2/moveit2 which does a lot of the heavy lifting and should generalize well to other embodiments. Will push to text-to-cad soon. Next step IRL assembly and testing!

11,628 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

906,740 views • 2 months ago

text-to-cad just crossed 10,000 stars you can use it to generate: - STEP files - URDF, SDF and other sim artifacts - 3D mesh files like STL, 3MF and GLB - gcode for 3D printing - DFM checks for popular services like sendcutsend 100% free and open source ✌️
0:42
earthtojake's profile picture

text-to-cad just crossed 10,000 stars you can use it to generate: - STEP files - URDF, SDF and other sim artifacts - 3D mesh files like STL, 3MF and GLB - gcode for 3D printing - DFM checks for popular services like sendcutsend 100% free and open source ✌️

Jake Fitzgerald

239,154 views • 1 month ago

6 degrees of freedom 700g payload 600mm reach $170 BOM chefs kiss
0:29
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6 degrees of freedom 700g payload 600mm reach $170 BOM chefs kiss

Jake Fitzgerald

17,444 views • 6 days ago

assembling a LEGO star destroyer with claude opus 5 (this is animating a real STEP file with 3226 bricks)
0:22
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assembling a LEGO star destroyer with claude opus 5 (this is animating a real STEP file with 3226 bricks)

Jake Fitzgerald

27,727 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

39,918 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

52,960 views • 4 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

35,256 views • 3 months 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

36,421 views • 3 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

25,517 views • 3 months 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 • 4 months ago

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

Jake Fitzgerald

21,761 views • 4 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

16,024 views • 3 months ago

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