s4h-systems

s4h-systems is a skill for Claude Code from human-avatar/skills-for-humanity. It costs 77 tokens per session (1,111 once invoked), scanned A, original, MIT.

A systems-thinking guide that helps choose between methods for studying feedback loops, recurring patterns, unexpected behaviour, or points of intervention.

In plain words
What is it for?
Use it to analyse how a system behaves, identify feedback relationships, and select a suitable systems-analysis approach.
Why use it?
It gives structure to problems where different parts influence one another and the result is difficult to predict.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: names the AskUserQuestion tool.

Part of the skills-for-humanity plugin — 197 skills, 1 hook shipped together

Good fit Use it to analyse how a system behaves, identify feedback relationships, and select a suitable systems-analysis approach.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/human-avatar/skills-for-humanity/s4h-systems
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 human-avatar/skills-for-humanity --skill s4h-systems
Clone the repo
git clone --depth 1 https://github.com/human-avatar/skills-for-humanity

Made for: Claude Code.

Or install skills-for-humanity, the plugin that ships this one along with the rest of its 197 skills, 1 hook.

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 s4h-systems

README.md
[![agentmods](https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-systems/github.svg)](https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-systems)
Your own site
<a href="https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-systems"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-systems/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 s4h-systems

Your own site · 80×15
<a href="https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-systems"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-systems.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,111 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00077 $0.01111
Opus 5 $0.00039 $0.00556
Sonnet 5 $0.00015 $0.00222
Haiku 4.5 $0.00008 $0.00111

Measured 9d ago against content hash ab2b8569c457, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

s4h-systems 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 9d 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/s4h-systems/SKILL.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Systems

Applies systems thinking to complex, dynamic situations. Diagnoses what kind of systems analysis is needed and applies the right tool.

Which tool fits

You need to... Tool
Recognize what recurring system pattern this is archetype-matching
Understand unexpected or counterintuitive system behavior emergence-detection
Map the feedback loops driving behavior feedback-mapping
Find where small interventions produce large change leverage-analysis

Routing Decision

Framing check: Confirm the system and the feedback relationship in focus before routing. State what you've identified — the actual system being analyzed and the behavior or dynamic at stake — in one sentence, then use AskUserQuestion:

  • Question: "I'm reading this as: [your one-sentence framing of the system and the dynamic in focus]. Is that right?"

  • Header: "Framing"

  • Options:

    • Yes — proceed — framing is correct
    • Adjust — one element is off; user will correct it before you continue
    • Reframe — different situation than read; incorporate the correction before proceeding
  • Situation has a familiar-feeling dynamic — want to name the archetype → archetype-matching

  • System is producing results no one intended or expected → emergence-detection

  • Need to understand what's reinforcing the current behavior → feedback-mapping

  • Need to know where to intervene for maximum effect → leverage-analysis

  • Unclear → feedback-mapping; mapping the loops reveals archetypes, emergence, and leverage points together

Confirm Direction

After diagnosing which tool fits, use the AskUserQuestion tool to confirm direction. Construct the question dynamically to include your diagnosis:

  • Question: "My read: [diagnosed tool] — [one sentence on why it fits]. How would you like to proceed?"
  • Header: "Direction"
  • Options:
    • Yes, run that tool — Execute the diagnosed skill immediately using the context already provided
    • Show all options — List every skill in this category with one-line descriptions
    • Quick version — Run a lighter-weight alternative if one exists for this situation
    • Re-diagnose — Revisit the situation description for a different read

Read the full file on GitHub · 88 lines

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. 9d ago First seen · 88 lines · 77 tokens per session scan A ab2b8569c457

Subscribe to this mod's changes

s4h-systems is a skill published in the GitHub repository human-avatar/skills-for-humanity (223 stars, last pushed 1mo ago), licensed MIT. It adds 77 tokens to every session and 1,111 once invoked, about $0.0004 per session on Opus 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 2026-09-03.

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