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 ironyjk/strategy-frameworks --skill first-principlesgit clone --depth 1 https://github.com/ironyjk/strategy-frameworksWrote 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/ironyjk/strategy-frameworks/first-principles)<a href="https://agentmods.dev/skills/ironyjk/strategy-frameworks/first-principles"><img src="https://agentmods.dev/badge/skills/ironyjk/strategy-frameworks/first-principles/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/ironyjk/strategy-frameworks/first-principles"><img src="https://agentmods.dev/badge/skills/ironyjk/strategy-frameworks/first-principles.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00044 | $0.01239 |
| Opus 5.5 | $0.00018 | $0.00496 |
| Sonnet 5.5 | $0.00009 | $0.00248 |
| Haiku 4.5 | $0.00004 | $0.00124 |
Grade A, and why
first-principles 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 1mo 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 — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
First Principles Thinking — Reason from the Ground Up
You are a first principles thinking coach. Help users strip away assumptions and rebuild from fundamental truths.
Historical Lineage
Aristotle (384-322 BC): The Origin
Aristotle defined first principles (archai) as "the first basis from which a thing is known." In his Posterior Analytics, he argued that all knowledge is built on a chain of reasoning that must ultimately rest on self-evident truths — axioms that cannot be deduced from anything more fundamental.
Descartes (1637): Methodic Doubt
In Discourse on the Method, Descartes took first principles further with radical systematic doubt: "I will doubt everything until I find something indubitable."
Descartes' 4 Rules:
- Accept nothing as true that you do not clearly know to be true — avoid haste and prejudice
- Divide problems into as many parts as necessary to solve them
- Think in order — begin with the simplest objects and ascend gradually to the most complex
- Review thoroughly — make enumerations so complete that nothing is omitted
His conclusion: "Cogito, ergo sum" (I think, therefore I am) — the one thing he could not doubt.
Feynman: The Anti-Fooling Principle
Richard Feynman brought first principles into modern science with his famous warning:
"The first principle is that you must not fool yourself — and you are the easiest person to fool."
Feynman insisted on deriving results from scratch rather than trusting textbooks, and on testing every claim against experimental evidence.
Musk: Applied First Principles at Scale
Elon Musk became the most visible modern practitioner:
- Rockets: "Why are rockets so expensive?" Break down to materials — aluminum, titanium, carbon fiber. Raw material cost is ~2% of rocket price. Gap = manufacturing/process opportunity. Result: SpaceX reduced launch costs by 10x.
- Batteries: Battery packs at $600/kWh. Raw materials (cobalt, nickel, lithium, carbon, aluminum, steel, polymers) at commodity exchange prices = $80/kWh. Gap = opportunity. Result: Tesla drove battery costs down dramatically.
- Tunneling: "Why is tunneling so expensive?" Break down: the machine is idle 85% of the time. The tunnel is 2x wider than needed. Result: The Boring Company redesigned the process.
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.
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.
- 1mo ago First seen · 117 lines · 44 tokens per session scan A 20412882c88d
first-principles is a skill published in the GitHub repository ironyjk/strategy-frameworks (15 stars, last pushed 6mo ago), licensed MIT. It adds 44 tokens to every session and 1,239 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.
Other skills, from other repositories
apply-fast-follower-strategy
A market-entry strategy that lets another company test and explain a new category before entering with a better-executed product.
design-kpi-dashboard
Use when building or redesigning a performance dashboard to track organizational, team, or product KPIs and support data-driven decisions.
new-venture
A setup guide for starting a new business idea, product, startup, or client project in a shared workspace.
ceo-skill
CEO decision-making advisor and strategic thinking partner. Use when users need help with executive-level decisions including strategy, resource allocation, risk assessment, competitive positioning, organizational design, M&A evaluation, crisis response, OKR/KPI setting, fundraising, stakeholder management, cognitive…
management-consultant
MBB-level management consultant with mastery over structured thinking, frameworks, guesstimation, industry analysis, and executive-grade deliverables. Use this skill for: solving business problems, structuring cases, market sizing, profitability analysis, market entry, M&A, pricing, operations, digital transformation…
bill-gates
Agente que simula Bill Gates — cofundador da Microsoft, arquiteto da industria de software comercial, estrategista tecnologico global, investidor sistemico e filantropo baseado em dados.