4/4 The fix upstream? Two characters, basically:uint32_t → size_t Weeks of debugging for one tiny type-width bug. Great reminder that in RL infra, the hardest part is often finding the right boundary around the failure. 👉Blog with the full investigation + the upstream vLLM PR: ai21.com/blog/vllm-cuda-inte…
SOFTWARE
-
Silent 32-bit Integer Overflow in vLLM Mamba-1 CUDA Kernel
By
–
3/4 Root cause: a silent 32-bit integer overflow inside a vLLM CUDA kernel for Mamba-1 selective scan forward kernel. cache_index * ssm_states_batch_stride overflowed once cache slots got large enough, corrupting writes with no crash and no warning.
-
Refactor Code into Venice Plugin Architecture
By
–
This violates the new plugin architecture, please refactor this into a venice plugin and ping me again.
-
AI21Labs découvre débordement uint32 dans kernel CUDA vLLM Mamba-1
By
–
Thanks to @AI21Labs for tracking down a silent uint32 overflow in vLLM's Mamba-1 CUDA kernel and contributing the fix. Root cause: `uint32_t` stride × cache_index overflows silently at scale. Fix merged in #35275. The debugging story is worth a read. 🔗 ai21.com/blog/vllm-cuda-inte…
-
GPU Kernel Optimization: A Readable Technical Guide
By
–
BTW, the whole topic of GPU code and kernel optimization is still a huge black box for me. If you guys can come up with a readable-yet-technically-sound blog post (or a series of those) I would really Leo to read it.
-
Double Esc to Undo Context in Claude Code
By
–
Did anyone else not know about double esc to undo context in Claude Code?! When it messes up you can just roll back the context and code. This makes history shorter and I'm building a better feel for what sorts of instructions work well
-
Space Engineers 2 VS2.2 Released: Dev Diary Updates
By
–
My new Dev Diary is out! VS2.2 is live and hotfixes are underway 🔶 Space Engineers 2 VS2.2 released 🔶 First look at NPC pathfinding in VS4 🔶 Merge Block preview and new Verdure trees 🔶 Space Engineers 1 Structural Blocks Read here 👉 blog.marekrosa.org/2026/03/m… What are YOU engineering? We want to see your creations!
→ View original post on X — @marek_rosa, 2026-03-26 09:10 UTC
-
New Screenshot Skill Shipped with AI App
By
–
we ship a screenshot skill along with the app and that’d be quite helpful for this, give it a shot!
-
Windows version coming soon for AI application
By
–
Ah, windows coming soon. No announcement/eta yet.
-
Claude Code on Mobile: A Game-Changing Productivity Tool
By
–
I don’t think you all understand how powerful Claude Code is from a phone. Telegram, iMessage, remote control, mobile command, dispatch, whatever you have to do. Just get this thing on your phone. My team is going to hold a no-laptop hack day soon, where everyone is forced to leave their desk and just be on a walk or at a restaurant or in a park with their phone (and dictation, I’m sure). Whoever is most productive wins.
→ View original post on X — @alliekmiller, 2026-03-26 03:45 UTC