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Guide · Open source

How to use last30days-skill: install and run a 30-day research brief

Updated · written with AI from the project's own documentation and checked against our catalogue data

last30days-skill is an AI agent skill that searches a topic across sources such as Reddit, X, YouTube, Hacker News and Polymarket, then has an agent combine the results into one brief. It is built for people who use an agent host such as Claude Code and want a recent, community-driven view of a topic. After this guide you will know how to install it, run a search with a topic, and judge what the output can and cannot tell you.

last30daysmvanhorn/last30days-skill · ★ 66.3k · MIT

Quick start

  1. 1Confirm your agent host. Make sure you have an AI agent host that supports Agent Skills, such as Claude Code.
  2. 2Add the marketplace. In Claude Code, run the marketplace add command for mvanhorn/last30days-skill.
  3. 3Install the plugin. Run the plugin install command for last30days.
  4. 4Or install for another host. For other Agent Skills hosts, run the npx skills add command with the -g flag for a global install.
  5. 5Run a search. Invoke /last30days followed by your topic, such as a person or company name.
  6. 6Add credentials for more sources. Optionally configure API keys or browser sessions for sources that need them, following the project's configuration guide.
  7. 7Verify important claims. Check key facts in the brief against primary sources, since the summary is built from social posts.

What last30days-skill does

You give the skill a topic. It searches sources such as Reddit, X, YouTube, Hacker News and Polymarket in parallel, then an AI agent combines the results into one brief.

Results are ranked by how much real people engaged with them, such as upvotes, likes or betting odds, rather than by search-engine ranking.

Check the prerequisites

You need an AI agent host that supports Agent Skills. The README names Claude Code as an example. This is a skill for an agent host, not a standalone app with a graphical interface.

  • An agent host that supports Agent Skills, such as Claude Code
  • Optional: API keys or browser sessions for extra sources, since many sources need configuration

Install the skill in Claude Code

In Claude Code, add the marketplace and then install the plugin. The README describes this as the recommended route because it auto-updates via the marketplace.

/plugin marketplace add mvanhorn/last30days-skill /plugin install last30days

Install the skill in other agent hosts

For Codex, Cursor, Copilot, Gemini CLI or other hosts that support Agent Skills, the README gives a single command. The -g flag installs globally for your user, available across all projects. Drop it to scope the install per project.

npx skills add mvanhorn/last30days-skill -g

Run your first search

Run the skill with a topic after the command name. The README example uses a person's name for a meeting prep search. Reddit, Hacker News, Polymarket and GitHub work with no configuration. Running the skill once also starts a setup wizard that the README says can unlock X, YouTube, TikTok, arXiv, Techmeme and more.

  • Ask for the sources you need in your request; availability depends on credentials, installed tools, the topic and explicit opt-ins
  • For sources that need extra setup, see the source requirements section of the project's CONFIGURATION.md
/last30days Peter Steinberger

Read and judge the brief

Treat the brief as a starting point built from social posts, not as verified facts. The README does not describe any fact-checking step, so check claims that matter against primary sources.

Pay attention to which sources contributed. Some sources, such as Polymarket, reflect money staked on outcomes rather than opinions, while Reddit and X reflect engagement.

  • Check whether the sources you care about were actually included
  • Verify important claims before acting on them

Choose the right use

The project is aimed at a recent, community-driven picture of a topic from the past 30 days, such as preparing for a meeting with a person or company, or checking what developers are discussing.

  • Good fit: a recent public picture of a person, company or topic before a meeting
  • Good fit: developers who want research inside their agent
  • Poor fit: anyone needing guaranteed, verified facts
  • Poor fit: people who will not set up credentials, since many sources need configuration

What people use it for

  • Preparing for a meeting by reading recent public posts about a person or company
  • Checking what developers are discussing about a tool or topic in the past 30 days
  • Scanning community reaction to a product, such as opinions on Reddit and X
  • Looking at Polymarket odds as a signal of what people are betting on for a topic

Frequently asked questions

Is last30days-skill free?

The project is released under the MIT licence. The README says Reddit, Hacker News, Polymarket and GitHub work immediately with zero config, and that Reddit is free with no API key. Some other sources need API keys, browser sessions or paid services such as Bright Data credits, so those can cost money.

What do I need to run last30days-skill?

You need an AI agent host that supports Agent Skills, such as Claude Code. Extra sources need credentials, installed tools or explicit opt-ins, depending on the source.

Does last30days-skill have a graphical interface?

No. The project describes itself as a skill for an agent host, not a standalone app with a graphical interface.

How do I install last30days in Claude Code?

Run /plugin marketplace add mvanhorn/last30days-skill, then run /plugin install last30days. The README recommends this route because it auto-updates via the marketplace.

Why does a search take the results from social platforms instead of Google?

The project ranks results by real engagement such as upvotes, likes and betting odds rather than by search-engine ranking. The README says no single AI has access to all of these platforms, which is why the skill bridges them through your own keys and sessions.

Can I trust the summary as fact?

Not on its own. The summary is built from social posts and the README does not describe fact-checking, so verify anything important against primary sources.

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Our verdict

Use last30days-skill if you work inside an Agent Skills host like Claude Code and want a recent, community-driven brief on a person, company or topic, and you are willing to add credentials for extra sources. Pick something else if you need verified facts, a standalone app with a visual interface, or a tool you can run without configuring any accounts.

Install options & downloads