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.
npx skills add human-avatar/skills-for-humanity --skill s4h-historicalgit clone --depth 1 https://github.com/human-avatar/skills-for-humanityWrote 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.
[](https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-historical)<a href="https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-historical"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-historical/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.
<a href="https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-historical"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-historical.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00075 | $0.01070 |
| Opus 5 | $0.00037 | $0.00535 |
| Sonnet 5 | $0.00015 | $0.00214 |
| Haiku 4.5 | $0.00007 | $0.00107 |
Grade A, and why
s4h-historical 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.
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.
Historical
Applies historical reasoning to current situations. Diagnoses what kind of historical analysis is needed and applies the right tool.
Which tool fits
| You need to... | Tool |
|---|---|
| Identify what recurring cycle this is and where you are in it | cycle-detection |
| Find recurring failure modes from similar past situations | failure-analysis |
| Extract the transferable principle from a specific historical case | lesson-extraction |
| Find genuinely similar historical situations to inform a decision | precedent-analysis |
Routing Decision
- Situation feels like it has been seen before, want to know where in the pattern you are → cycle-detection
- About to do something and want to know how it typically fails → failure-analysis
- Have a specific historical case and want to know what it actually teaches → lesson-extraction
- Making a decision and want to know what history says → precedent-analysis
- Unclear → precedent-analysis; finding the analogous situation usually reveals cycles, lessons, and failure modes together
Framing check: Confirm the specific historical situation before routing. State what you've identified — the actual situation being examined, what time pressure or decision is attached, and the historical angle being sought — in one sentence, then use AskUserQuestion:
- Question: "I'm reading this as: [your one-sentence framing of the situation and what historical lens fits]. 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
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
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.
- 9d ago First seen · 88 lines · 75 tokens per session scan A 32bdb26152ee
s4h-historical is a skill published in the GitHub repository human-avatar/skills-for-humanity (223 stars, last pushed 1mo ago), licensed MIT. It adds 75 tokens to every session and 1,070 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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