What is system-finder?

A research workflow for finding and comparing software systems, such as databases, message queues, or alternatives to a named tool. It produces a comparison report to help with selection.

Use it to compare tools, find alternatives, or identify systems that meet a functional requirement. It can save the findings as a structured report in a location you choose.

It reduces the work of searching for candidates, checking information, and comparing them in a consistent format. This is useful when you know the problem but not which software fits it.

system-finder — Skill for Claude Code by cyyeh/skills-playground

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 cyyeh/skills-playground --skill system-finder

Clone the repo

git clone --depth 1 https://github.com/cyyeh/skills-playground

Made for: Claude Code.

Or install system-explorer, the plugin that ships this one along with the rest of its 4 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/cyyeh/skills-playground/system-finder/github.svg)](https://agentmods.dev/skills/cyyeh/skills-playground/system-finder)

Your own site

<a href="https://agentmods.dev/skills/cyyeh/skills-playground/system-finder"><img src="https://agentmods.dev/badge/skills/cyyeh/skills-playground/system-finder/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/cyyeh/skills-playground/system-finder"><img src="https://agentmods.dev/badge/skills/cyyeh/skills-playground/system-finder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 134 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,136 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.

Model	Per session	Once invoked
Fable 5.1	$0.00134	$0.02136
Opus 5.5	$0.00054	$0.00854
Sonnet 5.5	$0.00027	$0.00427
Haiku 4.5	$0.00013	$0.00214

Measured 2mo ago against content hash 04b6ccdd0e74, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

system-finder 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.

skills/system-explorer/system-finder/SKILL.md · 175 lines

How it starts

The opening of the file, as written. The whole thing — 175 lines — stays where its author put it; the contents beside it link to each section on GitHub.

System Finder

Discover software systems that match a user's target and present a structured comparison for selection. The target can be a specific system name ("Kafka"), a software category ("message queues"), or a functional requirement ("I need real-time data processing"). The output is a comparison table written to a user-chosen output directory (default: dist/[system-name]/finder-report.md).

First-Run Welcome

When triggered without a specific query, introduce the skill:

I can help you find and compare software systems.

Tell me what you're looking for:

A specific system -- "Tell me about Kafka" or "What is CockroachDB?"

A category -- "What message queues exist?" or "Compare CI/CD tools"

A requirement -- "I need real-time analytics" or "I need a database for time series data"

Alternatives -- "What are alternatives to Redis?" or "Kafka vs RabbitMQ"

I'll research options, compare them, and help you pick the right one.

Output Directory

Always ask the user where to save the finder report before writing any files. Use AskUserQuestion to prompt:

Where would you like me to save the finder report? Default: dist/[system-name]/

Accept the user's chosen path. If they accept the default or say something like "that's fine" or "default", use dist/[system-name]/. Store this path as [output-dir].

Exception: When called by the system-explorer orchestrator with a pre-determined output directory, use that directory without re-asking.

Create the directory if it does not exist.

The Process (3 Phases)

Phase 1: Understand the Target

Parse the user's query to determine the type:

Specific system -- The user named a system ("Kafka", "Redis", "Terraform"). Confirm the target: "You want to explore Apache Kafka?" Then suggest proceeding directly to system-analyzer. Skip Phase 2 unless the user wants to see alternatives.
Category -- The user named a software category ("message queues", "databases", "CI/CD tools"). Proceed to Phase 2 to discover systems in that category.
Requirement -- The user described a need ("I need real-time data processing", "something for container orchestration"). Map the requirement to one or more categories, then proceed to Phase 2.
Comparison -- The user wants to compare specific systems ("Kafka vs RabbitMQ"). Proceed to Phase 3 with those systems pre-selected.

Read the full file on GitHub · 175 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.

references/search-strategies.md 9.0 KB

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.

2mo ago First seen · 175 lines · 134 tokens per session scan A 04b6ccdd0e74

Subscribe to this mod's changes

system-finder is a skill published in the GitHub repository cyyeh/skills-playground (2 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 134 tokens to every session and 2,136 once invoked, about $0.0005 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 2026-08-31.

Research

system-finder next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
system-findercyyeh/skills-playground	Skill	2	7mo ago	Apache-2.0	A	134	Claude Code
imagegenopenai/codex	Skill	135k	today	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	100k	yesterday	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	yesterday	MIT	A	36	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	80k	7d ago	MIT	A	200	Claude Code, Codex
next-cache-components-adoptionvercel/next.js	Skill	144k	today	MIT	A	95	Claude Code
chat-pet-sprite-creationmicrosoft/vscode	Skill	195k	yesterday	MIT	A	53	Claude Code, Codex