Sebastian Castro
@roboticseabass
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Manipulation software @rai_inst, robotics open source contributor + educator on the side. Substance over hype. 🇨🇱🇯🇲🤘
Cambridge, MA
Joined August 2025
Chilean pride is high right now! 🇨🇱🤘 https://t.co/1CeTPoSJrR
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Just used this handy tool to get doxygen generated api docs into a sphinx/readthedocs page. https://t.co/sBpqDj2nU5 Not my favorite activity, but it would have been way worse without.
github.com
ReStructuredText and Sphinx bridge to Doxygen. Contribute to breathe-doc/breathe development by creating an account on GitHub.
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ROSCon 2025 in Singapore is a wrap, and I am super happy to not have to do any work for a few days because it was a lot of preparation. I've written up a blog post with my experiences to share with all of you: https://t.co/1XK0U1XHbP
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What ROS at an Airport Apple Store?! Pixi makes installation so easy, we can install ROS anywhere now. #ROSCon2025 #ROSCon #ROS
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I have a hard time dealing with people who make you feel bad/stupid for not knowing something they do -- whether intentional or due to poor social skills. As someone in tech, I should have already become desensitized to this, but I guess you can't just change how you feel.
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I will also be the first to acknowledge that I am far from the world's leading ML expert... but broader exposure to the field goes a long way.
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The first image (white background) is from my ROSCon 2024 summary blog. The second two (pink background) are from the ROSCon 2025 program. Sometimes it pays off to be salty enough to take matters into your own hands.
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See Spot perform dynamic whole-body manipulation. Using a combination of reinforcement learning (RL) and sampling-based control, the robot is able to autonomously drag, roll, and stack tires weighing 15 kg (33 lb), well above its maximum arm lift capacity. Learn more about
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Doing a whole bunch of OSS pushes pre-ROSCon. I'm psyched up for now, but definitely looking forward to the break after the conference.
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Still looking! If you are interested and/or know anyone, do consider applying.
I'm hiring for my team @rai_inst! If you're based in the US and are interested in working on robots solving complex, contact-rich, long-horizon tasks, do consider applying. https://t.co/krIXvWqxGU
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Always a great read. Whenever I run across a data scale maximalist, I respond with a (less eloquent) version of the arguments here. So I'm super glad to now have this content.
I have just finished and just published some weekend reading for you. 9,600 words of not easy reading, on why today's humanoid robots won't learn to be dexterous.
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Ah yes, the timeline is CoRL FOMO now. Say hi to my RAI colleagues while you're all there!
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Excited to share Vibes — a new feed in the Meta AI app for short-form, AI-generated videos.
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The field of robotics is undergoing a historic revolution right now. I’ve spent the last year thinking about how to mentally model the breakneck progress in robotics + AI. With the help of mascots like “The AGI Bro”, we can try to sift through the noise 🧵
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Absolute dumpster fire of a day. I've tried to do too many things, none of them exciting, I didn't do a good job at any one of them, and I'm too tired to form a coherent sentence. Sometimes you just need to take the L and try again another day.
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Pinocchio 3.8.0 was just released! I'm excited about this release because my feature (Viser visualizer) is included, plus there are a lot of fixes (especially to mimic joints) that came from issues I ran into myself. Open source is great. https://t.co/XziNFpbBam
github.com
What's Changed Added Continuous joints can now be parsed as mimic from a urdf file (#2756) Beta version of Viser visualizer (#2718) Add pinocchio::graph::ModelGraph class Simple API to build ...
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Planning and control of high-DOF robots is a super interesting technical challenge. Making robots perform skills without hand-engineering point solutions is a super interesting research problem. Are these the most practical solutions to every societal problem? [citation needed]
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