Rust but Lisp
In plain words
Rust but Lisp is a developer tool that combines Rust's performance and safety features with Lisp's functional programming paradigm. It targets programmers seeking an alternative to traditional systems languages while maintaining low-level control and compile-time guarantees. The project merges memory safety mechanisms from Rust with Lisp's symbolic computation and macro capabilities, appealing to developers interested in exploring hybrid language design.
written from the facts on this page · September 2026
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- NW
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
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