---
title: "Discussion on \"Stillwater 1.0: Pragmatic Effect Composition and Validation for Rust\" | Hashnode"
description: "Discussion on \"Stillwater 1.0: Pragmatic Effect Composition and Validation for Rust\". Announcing stillwater 1.0 - a Rust library for the pure core, imperative shell pattern"
url: "https://hashnode.com/posts/stillwater-1-0-release/694c710efb5f56be0cd295d0"
---

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# [Stillwater 1.0: Pragmatic Effect Composition and Validation for Rust](https://entropicdrift.hashnode.dev/stillwater-1-0-release?utm_source=hashnode&utm_medium=feed)

Announcing stillwater 1.0 - a Rust library for the pure core, imperative shell pattern

Dec 24, 2025 · 9 min read · entropicdrift.hashnode.dev  
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-   [#rust](https://hashnode.com/tag/rust)
-   [#functional-programming](https://hashnode.com/tag/functional-programming)
-   [#validation](https://hashnode.com/tag/validation)
-   [#effects](https://hashnode.com/tag/effects)

## Written by

[Glen Baker](https://hashnode.com/@iepathos)

@iepathos

  
[View profile](https://hashnode.com/@iepathos)

I'm a polyglot comfortable across the stack. Building open source tools in my free time and writing about static code analysis, information theory, developer tooling, and AI.

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