Lobsters Vibecoding Challenge (Winter 2025-2026). GitHub Gist: instantly share code, notes, and snippets.

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A challenge designed to test AI code generation tools ("vibecoding") on genuinely difficult programming tasks. Three tasks are presented: optimizing a brainfuck interpreter using pointer propagation in RPython, porting a Raku compiler to a statically-linkable language, and achieving massive performance improvements in Python. Each task includes specific grading rubrics, time estimates, and strict requirements including compilation via Nix, working solutions, and full documentation of the AI interaction process.

Lobsters Vibecoding Challenge (Winter 2025-2026)

Task 1 Propagate the Fuck (Can't Propagate the Fuck)

Task 2: Late, as in the late unknown-linux-musl

Task 3: Don't you know? Python makes you fast. (Haha, one!)