--- title: Retrace: Debug AI agents by replaying and forking runs description: Retrace is a tool for debugging AI agents by recording, replaying, and forking agent execution runs. It captures every LLM call, tool invocation, and error,... canonical: https://daily.dev/posts/retrace-debug-ai-agents-by-replaying-and-forking-runs-o4z0ixxgh twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Retrace: Debug AI agents by replaying and forking runs | daily.dev og:description: Retrace is a tool for debugging AI agents by recording, replaying, and forking agent execution runs. It captures every LLM call, tool invocation, and error,... og:url: https://daily.dev/posts/retrace-debug-ai-agents-by-replaying-and-forking-runs-o4z0ixxgh og:image: https://api.daily.dev/og/posts/O4z0IxxGH.png og:image:alt: Retrace: Debug AI agents by replaying and forking runs og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Retrace: Debug AI agents by replaying and forking runs **[Product Hunt](https://daily.dev/sources/ph)** · 1 min read · 0 upvotes · 0 comments ## Summary Retrace is a tool for debugging AI agents by recording, replaying, and forking agent execution runs. It captures every LLM call, tool invocation, and error, allowing developers to iterate quickly. A key challenge discussed is distinguishing real regressions from model non-determinism when replaying runs, with Retrace providing first-divergence diffs and verdicts of improved, regressed, or unchanged. Free tier includes 1,000 traces per month. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Debug and evaluate your AI app from your coding agent with Datadog Agent Observability](https://daily.dev/posts/debug-and-evaluate-your-ai-app-from-your-coding-agent-with-datadog-agent-observability-uwbwi17jy) · Datadog · 0 upvotes · 0 comments - [In software, the code documents the app. In AI, the traces do.](https://daily.dev/posts/in-software-the-code-documents-the-app-in-ai-the-traces-do--4345mlxhv) · LangChain · 16 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#ai-agents](https://daily.dev/tags/ai-agents), [#observability](https://daily.dev/tags/observability) [View this post on daily.dev](https://daily.dev/posts/retrace-debug-ai-agents-by-replaying-and-forking-runs-o4z0ixxgh) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Retrace: Debug AI agents by replaying and forking runs","url":"https://daily.dev/posts/retrace-debug-ai-agents-by-replaying-and-forking-runs-o4z0ixxgh","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/retrace-debug-ai-agents-by-replaying-and-forking-runs-o4z0ixxgh"},"datePublished":"2026-07-02T07:46:20.941Z","dateModified":"2026-07-02T07:46:45.301Z","description":"Retrace is a tool for debugging AI agents by recording, replaying, and forking agent execution runs. 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