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Rust crate fixes Claude's unreliable JSON output

A developer created a Rust crate called `llm-json-repair` to address issues with large language models, specifically Anthropic's Claude, returning JSON output that is not always parseable. The crate attempts to fix common formatting errors like extraneous prose, trailing commas, and incorrect fence usage in three sequential passes. This tool aims to save developers from making additional API calls to re-prompt the LLM for corrected JSON. AI

影响 Provides a local solution for developers struggling with LLM structured output, reducing API costs and improving workflow efficiency.

排序理由 A developer created a new software tool to solve a specific problem with an existing AI model.

在 dev.to — LLM tag 阅读 →

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Rust crate fixes Claude's unreliable JSON output

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  1. dev.to — LLM tag TIER_1 English(EN) · Mukunda Rao Katta ·

    Claude 返回了 14% 的 ```json 代码块。这是我早该拥有的 Rust 库。

    <p>I had a system prompt that ended with: <code>Reply with only a JSON object. Do not include code fences. Do not include explanation.</code></p> <p>That should be enough. It is not.</p> <p>Over a week of structured-output calls (12,400 of them, mostly Claude Sonnet 4.5 and 4.7),…