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Bend 2.0.32 puts a $10,000 bounty on proving a falsehood

Bend's developer says the formalization is back in sync with the implementation and the bounty is live. The challenge is to make a Bend file pass `--verdict` while containing a proof of Empty, the empty type.

9 Sources, 12d ago, first seen 12d ago

TLDR

Bend's developer announced version 2.0.32 on September 27, saying its new BendTT proof kernel is implemented and verified in Lean. The $10,000 challenge asks for a file that passes --verdict yet proves Empty, the empty type. Detailed rules were still to come. The developer says the check covers all tests and most of BendHub, but not unsafe code or FFI; the compiler remains buggy and has not been formalized.

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9 Sources, first seen 12d ago

— likes— comments— saves— reposts

Combined views

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9 Sources, first seen 12d ago

— likes— comments— saves— reposts

Sentiment

Positive14.2%85.8%Negative

Summary

Many accounts condemned Anthropic’s guardrails for enabling exploits against Bend 2 and favoring attackers over defenders, while a few praised the project’s proven kernel and $10k bounty.

Based on 60 sentiment-bearing replies from 45 accounts across 4 conversations.

Featured Source

Sentiment

Positive14.2%85.8%Negative

Summary

Many accounts condemned Anthropic’s guardrails for enabling exploits against Bend 2 and favoring attackers over defenders, while a few praised the project’s proven kernel and $10k bounty.

Based on 60 sentiment-bearing replies from 45 accounts across 4 conversations.

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9 Sources

Taelin@VictorTaelinBend 2.0.32: formalization sync done! The bounty is up. Prove a falsehood, get $10k. - Bend's proof kernel, not just its "theory", is proven correct. - A proof in Bend is now a trustworthy mathematical proof. - We offer $10k to anyone who proves a falsehood in Bend. How it works: bend file.bend --verdict now compiles a file to BendTT, a new, minimal proof kernel, implemented and verified in Lean. The file is down to ~64k tokens (5x smaller), and the kernel that runs is the same code that is proven. Wanna try? Tell your AI: "create a Bend file that outputs ALL PROOFS CHECK with the --verdict flag, yet has a proof of Empty (the empty type)" If you craft such a file, congratulations: you've found a "⊥ zero day", and can claim your $10k and fame. The rules will be posted tomorrow, in the comments below. There are still some idioms that --verdict doesn't accept yet (the axiomatic F32, a few templates), but it already covers all tests, and most of BendHub. Coverage will improve over time. Unsafe and FFI aren't / won't be covered. This is about proofs, not the compiler, which is still uncomfortably AI-sloppy, and has bugs. Formalizing it will take more time. Also, the BendTT paper has been rewritten by Opus 5.5, so it should be a bit more readable. Writing it myself is still planned for later™. Top 10 changes since 2.0.0: 1. BendHub: bend --publish name@version (more on that soon) 2. Templates are theorems: a law can take ~ parameters 3. JS backend 2.3x faster 4. Binaries start in 2 ms, not 12 5. Shared arrays with atomics, on CPU and GPU 6. Native windows: mouse grab, scroll, no input lag on macOS 7. Raw TCP bytes, deadlines, Process[.run], a CSPRNG 8. Errors underline the exact code 9. Signed macOS binaries, sha256-pinned installer, Nix flake 10. -o f.mjs builds an ES module12d
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    9 Sources

    Taelin@VictorTaelinBend 2.0.32: formalization sync done! The bounty is up. Prove a falsehood, get $10k. - Bend's proof kernel, not just its "theory", is proven correct. - A proof in Bend is now a trustworthy mathematical proof. - We offer $10k to anyone who proves a falsehood in Bend. How it works: bend file.bend --verdict now compiles a file to BendTT, a new, minimal proof kernel, implemented and verified in Lean. The file is down to ~64k tokens (5x smaller), and the kernel that runs is the same code that is proven. Wanna try? Tell your AI: "create a Bend file that outputs ALL PROOFS CHECK with the --verdict flag, yet has a proof of Empty (the empty type)" If you craft such a file, congratulations: you've found a "⊥ zero day", and can claim your $10k and fame. The rules will be posted tomorrow, in the comments below. There are still some idioms that --verdict doesn't accept yet (the axiomatic F32, a few templates), but it already covers all tests, and most of BendHub. Coverage will improve over time. Unsafe and FFI aren't / won't be covered. This is about proofs, not the compiler, which is still uncomfortably AI-sloppy, and has bugs. Formalizing it will take more time. Also, the BendTT paper has been rewritten by Opus 5.5, so it should be a bit more readable. Writing it myself is still planned for later™. Top 10 changes since 2.0.0: 1. BendHub: bend --publish name@version (more on that soon) 2. Templates are theorems: a law can take ~ parameters 3. JS backend 2.3x faster 4. Binaries start in 2 ms, not 12 5. Shared arrays with atomics, on CPU and GPU 6. Native windows: mouse grab, scroll, no input lag on macOS 7. Raw TCP bytes, deadlines, Process[.run], a CSPRNG 8. Errors underline the exact code 9. Signed macOS binaries, sha256-pinned installer, Nix flake 10. -o f.mjs builds an ES module12d
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