l30

l30 is a skill for Claude Code from Kasempiternal/Claude-Agent-System. It costs 59 tokens per session (3,718 once invoked), scanned A, original, MIT.

A research workflow that gathers information published during the last 30 days from Reddit, Hacker News, DuckDuckGo, Lobsters, and GitHub. It compares, ranks, removes duplicates, and presents the results in an HTML dashboard.

In plain words
What is it for?
Use it to investigate a topic’s recent discussions, projects, and community activity across those five sources.
Why use it?
It avoids checking several research sources separately and manually sorting the results. It also focuses the search on recent information.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: model in frontmatter; names the AskUserQuestion tool.

Part of the cas plugin — 19 skills, 3 hooks, 2 MCP servers shipped together

Good fit Use it to investigate a topic’s recent discussions, projects, and community activity across those five sources.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kasempiternal/claude-agent-system/l30
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Kasempiternal/Claude-Agent-System --skill l30
Clone the repo
git clone --depth 1 https://github.com/Kasempiternal/Claude-Agent-System

Made for: Claude Code.

Or install cas, the plugin that ships this one along with the rest of its 19 skills, 3 hooks, 2 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for l30

README.md
[![agentmods](https://agentmods.dev/badge/skills/kasempiternal/claude-agent-system/l30/github.svg)](https://agentmods.dev/skills/kasempiternal/claude-agent-system/l30)
Your own site
<a href="https://agentmods.dev/skills/kasempiternal/claude-agent-system/l30"><img src="https://agentmods.dev/badge/skills/kasempiternal/claude-agent-system/l30/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for l30

Your own site · 80×15
<a href="https://agentmods.dev/skills/kasempiternal/claude-agent-system/l30"><img src="https://agentmods.dev/badge/skills/kasempiternal/claude-agent-system/l30.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,718 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00059 $0.03718
Opus 5.5 $0.00024 $0.01487
Sonnet 5.5 $0.00012 $0.00744
Haiku 4.5 $0.00006 $0.00372

Measured 2mo ago against content hash 49dd33b325e4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

l30 scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

claude-agent-system-plugin/skills/l30/SKILL.md · 371 lines

How it starts

The opening of the file, as written. The whole thing — 371 lines — stays where its author put it; the contents beside it link to each section on GitHub.

██╗      ██████╗  ██████╗
██║      ╚════██╗██╔═████╗
██║       █████╔╝██║██╔██║
██║       ╚═══██╗████╔╝██║
███████╗ ██████╔╝╚██████╔╝
╚══════╝ ╚═════╝  ╚═════╝

  Topic Research • Last 30 Days
     CLAUDE AGENT SYSTEM

MANDATORY: Output the banner above verbatim as your very first message to the user, before any tool calls or other output.

You are entering L30 RESEARCH MODE. You deploy a parallel agent swarm that scrapes 5 free sources (Reddit, Hacker News, DuckDuckGo, Lobsters, GitHub) using Scrapling, scores and ranks the results, then generates a self-contained HTML dashboard.

Your Role: Swarm Orchestrator

  • Parse the user's topic from $ARGUMENTS
  • Create a team and task graph with dependencies
  • Spawn 5 parallel scraper agents (Wave 1)
  • Spawn an intelligence agent to score/rank/deduplicate (Wave 2)
  • Spawn a report compiler to generate the HTML dashboard (Wave 3)
  • Show a summary and open the dashboard

Phase 0: Prerequisites

Step 1: Locate Skill Directory

Use Glob("**/skills/l30/templates/dashboard.html") to find the dashboard template. Extract the parent directory path (everything before /templates/). Store as L30_SKILL_DIR.

Step 2: Verify Python Environment

Resolve L30_PYTHON in this order:

  1. If $L30_PYTHON is set, use that interpreter.
  2. Otherwise, if $L30_HOME is set, use $L30_HOME/.venv/bin/python.
  3. Otherwise, use python3 found on PATH.

L30_HOME must be the l30 project directory. To configure a project-local environment in one step:

cd <l30-project-directory> && python3 -m venv .venv && .venv/bin/pip install -e .

Then set L30_HOME=<l30-project-directory> or L30_PYTHON=<path-to-python> before invoking /l30.

Run a Bash command that resolves the interpreter in that order and verifies it:

if [ -n "${L30_PYTHON:-}" ]; then
  VENV="$L30_PYTHON"
elif [ -n "${L30_HOME:-}" ]; then
  VENV="$L30_HOME/.venv/bin/python"
else
  VENV="$(command -v python3 || true)"
fi
test -n "$VENV" && test -x "$VENV" && "$VENV" -c 'import l30' && printf '%s\n' "$VENV"

Read the full file on GitHub · 371 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 371 lines · 59 tokens per session scan A 49dd33b325e4

Subscribe to this mod's changes

l30 is a skill published in the GitHub repository Kasempiternal/Claude-Agent-System (16 stars, last pushed 3mo ago), licensed MIT. It adds 59 tokens to every session and 3,718 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

l30 compared with skills from other repositories

l30 next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
l30Kasempiternal/Claude-Agent-SystemSkill163mo agoMITA59Claude Code
project-setupastropham1808/astro-agent-skillsSkill11mo agononeA150Claude Code
spine-reviewtonone-ai/tononeSkill774d agoMITA52Claude Code
python-servicesiliaal/whetstoneSkill36todayMITA48Claude Code, Codex
nodejs-backendiliaal/whetstoneSkill36todayMITA50Claude Code, Codex
documentationlgbarn/shipyardSkill6724d agoMITA62Claude Code
fec-data-fetchingbovinphang/frontend-craftSkill24yesterdayMITA76Claude Code