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Open Source Project of the Day #88: last30days —— The AI Agent Search Engine for the Last 30 Days Truth

In the AI era, getting "real" and "live" information is becoming increasingly difficult. Google's search results are filled with SEO-optimized spam, while social platforms like Reddit, X (Twitter), YouTube, and TikTok act as "walled gardens," creating disconnected silos of information.

Today, we're featuring last30days-skill (GitHub 28.8k Stars), an open-source project designed to break this deadlock. It isn't a traditional search engine; it's a new type of insight engine led by an AI Agent.

Core Philosophy: Searching People, Not Websites

Project creator mvanhorn notes that Google aggregates editors and SEO writers, while /last30days searches real people and their active engagement.

Its uniqueness lies in:

  1. Bridging Walled Gardens: No single AI has native access to all social platforms. Google doesn't touch Reddit comments; ChatGPT can't search X. /last30days uses agents to bridge these gaps.
  2. Scored by Real Engagement: Information isn't ranked by SEO algorithms but by Reddit upvotes, X likes, YouTube views, and even real money backed by Polymarket odds.
  3. AI Agent Synthesis: It doesn't just list links. An AI agent judge synthesizes fragmented data (posts, replies, transcripts, commits) into one brief, grounded summary.

What can it do for you?

1. Pre-Meeting Intelligence

If you have a meeting with a CEO tomorrow, Google might show you a LinkedIn profile from 2023.
Command: /last30days [Name]
It tells you what they're actually doing this month: their latest X debates, GitHub PRs, and podcast transcripts.

2. Truth Mining & Tool Comparisons

Want the real verdict on a new open-source tool?
Command: /last30days Tool-A vs Tool-B
It skips the generic "Top 10" blog posts and shows you the raw developer sentiment and top-voted comments from Reddit and Hacker News.

3. Real-time Market & Crisis Analysis

Leveraging real money from prediction markets like Polymarket.
Search: /last30days [Major Event]
You'll see not just media reports, but the odds backed by thousands of dollars in volume—often the most accurate signal for what's coming next.

Source Coverage

Source Why it matters
Reddit Unfiltered takes and real opinions that Google buries.
X / Twitter Hot takes, expert threads, and breaking reactions.
YouTube Deep dives analyzed via full transcripts for quotable insights.
Hacker News The developer consensus where technical people actually argue.
Polymarket Odds based on real money, providing high-signal predictions.
GitHub Real-time PR velocity and community heat.

Quick Start

/last30days can be integrated seamlessly into Claude Code or any tool supporting Agent Skills.

Installation

For Claude Code (Recommended):

/plugin marketplace add mvanhorn/last30days-skill
/plugin install last30days
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Using npx (Universal):

npx skills add mvanhorn/last30days-skill -g
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Example Usage

Once installed, try:

/last30days Peter Steinberger
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You'll get a full report on his recent work with OpenAI, his PR merge rate, and the community's recent debates about his projects.


Conclusion

/last30days represents a shift in how we search: moving from indexing webpages to indexing "crowd consensus." In an age of information fragmentation and SEO noise, it's a vital tool for seeing the truth selected by Reddit upvotes and real-money bets.



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I am Dongqi, exploring the infinite possibilities of AI Agents. Follow my homepage: WonderLab

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