---
title: "Show HN: I built lightweight LLM tracing tool with CLI"
slug: "show-hn-i-built-lightweight-llm-tracing-tool-with-cli"
date: 2026-04-06
category: community
tags: [agents]
language: en
sources_count: 1
featured: false
publisher: AInauten News
url: https://news.ainauten.com/en/story/show-hn-i-built-lightweight-llm-tracing-tool-with-cli
---

# Show HN: I built lightweight LLM tracing tool with CLI

**Published**: 2026-04-06 | **Category**: community | **Sources**: 1

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## TL;DR

- A developer built 'lightrace', a lightweight LLM tracing tool, after a year of struggling to debug agentic applications with existing solutions.

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## Summary

- A developer built 'lightrace', a lightweight LLM tracing tool, after a year of struggling to debug agentic applications with existing solutions.
- The tool is 100% open source and ships with a CLI interface for quick onboarding without heavy configuration.
- Core feature: the ability to re-call individual tool invocations to isolate failures in agent pipelines.
- Planned additions include caching, step re-execution, and branching – the project is actively seeking contributors.

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## Why it matters

A developer built 'lightrace', a lightweight LLM tracing tool, after a year of struggling to debug agentic applications with existing solutions.

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## Key Points

- A developer built 'lightrace', a lightweight LLM tracing tool, after a year of struggling to debug agentic applications with existing solutions.
- The tool is 100% open source and ships with a CLI interface for quick onboarding without heavy configuration.
- Core feature: the ability to re-call individual tool invocations to isolate failures in agent pipelines.
- Planned additions include caching, step re-execution, and branching – the project is actively seeking contributors.

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## Nauti's Take

Lightrace is very early-stage – one point and one comment on HN says it plainly. But the core idea is sound: anyone building agentic workflows knows the pain of not knowing which tool call broke the chain. The CLI-first approach is appealing because it assumes no extra UI infrastructure. Whether the project gains traction depends on how quickly the planned features land and whether documentation keeps pace. Developers who want to contribute to real AI-agent infrastructure tooling should check out the repo.

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## FAQ

**Q:** What is Show HN about?

**A:** - A developer built 'lightrace', a lightweight LLM tracing tool, after a year of struggling to debug agentic applications with existing solutions.

**Q:** Why does it matter?

**A:** A developer built 'lightrace', a lightweight LLM tracing tool, after a year of struggling to debug agentic applications with existing solutions.

**Q:** What are the key takeaways?

**A:** A developer built 'lightrace', a lightweight LLM tracing tool, after a year of struggling to debug agentic applications with existing solutions.. The tool is 100% open source and ships with a CLI interface for quick onboarding without heavy configuration.. Core feature: the ability to re-call individual tool invocations to isolate failures in agent pipelines.

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## Related Topics

- [agents](https://news.ainauten.com/en/tag/agents)

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## Sources

- [Show HN: I built lightweight LLM tracing tool with CLI](https://github.com/SKE-Labs/lightrace) - Hacker News AI

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## About This Article

This article is a synthesis of 1 sources, curated and summarized by AInauten News. We aggregate AI news from trusted sources and provide bilingual (German/English) coverage.

**Publisher**: [AInauten](https://www.ainauten.com) | **Site**: [news.ainauten.com](https://news.ainauten.com)

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*Last Updated: 2026-04-06*