I made PromptWatch – LangChain tracing on steroids

In plain words

PromptWatch is a tracing and debugging tool for LangChain applications that lets developers tune prompt templates directly in the browser without rerunning entire chains. It decouples templates from parameters, tracks session history and costs by project, and maintains version control for templates. Built to solve the friction of iterating on prompts during chain development, it is free to use.

written from the facts on this page · September 2026

From the sources

Track and optimize your brand's visibility in ChatGPT, Gemini, Claude, Perplexity and other AI search engines. Trusted by 1,840+ brands. Get started today.

Track, analyze, and optimize your brand's presence across ChatGPT, Claude, Gemini, Perplexity, and other AI search engines. Track real user prompts and see when AI mentions your brand in its responses. What is the best CRM for a startup? I need something easy to use and with a good free tier. Understand which citations drive visibility and discover what content gets recommended. See in real time when AI crawlers from ChatGPT, Gemini, and others read your pages. AI agents that create content based on real citation data — content that gets cited. Monitor your visibility score, sentiment, and share of voice across all AI platforms. Track your website's real-time mentions and visibility in AI…from promptwatch.io

In the maker’s words, at launch

As I was building my first few chains, I noticed how difficult it was to understand what was going on, why GPT was responding the way it was, and how I could improve it. Tinkering with my prompts was so tedious - I had to either update the prompt template and rerun the whole chain, or grab the actual prompt, take it…

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  Promptr, let GPT operate on your codebase and other useful goodies2023 · github.com · ▲109

  Hi HN, I've been working on an experimental tool that helps you use GPT to work on your codebase. I'd love to improve the tool if there's interest. New ideas welcome! I think this could also be useful for experimenting with other types of recursive prompts. It’s a little bit Swiss Army knife and a little bit skynet: https://github.com/ferrislucas/promptr From the README: Promptr is a CLI tool for operating on your codebase using GPT. Promptr dynamically includes one or more files into your GPT prompts, and it can optionally parse and apply the changes that GPT suggests to…

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