Swapping MicroPython for full CPython in a WASI sandbox
The user tests whether a WASI Python sandbox can swap MicroPython for full CPython, verifying startup cost, fuel limits, and a tricky zip-stdlib bug fix.
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Hunting a heap-spraying concurrency bug in Linux sound code
Claude hunts for a concurrency bug in a Linux kernel sound driver that could enable heap spraying, and proposes a locking fix around the vulnerable allocation.
Hunting memory bugs in a borrow-checker-without-types compiler
Claude audits an experimental Zig borrow-checker, tracing a double-free through nested destructuring and five other subtle provenance bugs with exact triggers.
Auditing grok-build's Silent Repository Upload Code
Claude reverse-engineers xAI's coding agent after reports it exfiltrated repositories, tracing a server kill switch and vestigial upload code in the source.
Chasing a phantom padding bug through a C++ tokenizer
A long hunt for pad tokens appearing at the start of every chunk, ending in a switch to left-padding so the last token lands where embeddings want it.