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 charlieviettq/awesome-agent-skill --skill econ-supply-demandgit clone --depth 1 https://github.com/charlieviettq/awesome-agent-skillWrote 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/charlieviettq/awesome-agent-skill/econ-supply-demand)<a href="https://agentmods.dev/skills/charlieviettq/awesome-agent-skill/econ-supply-demand"><img src="https://agentmods.dev/badge/skills/charlieviettq/awesome-agent-skill/econ-supply-demand/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/charlieviettq/awesome-agent-skill/econ-supply-demand"><img src="https://agentmods.dev/badge/skills/charlieviettq/awesome-agent-skill/econ-supply-demand.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 | $0.00099 | $0.01130 |
| Opus 5 | $0.00049 | $0.00565 |
| Sonnet 5 | $0.00020 | $0.00226 |
| Haiku 4.5 | $0.00010 | $0.00113 |
Grade A, and why
"econ-supply-demand" 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.
This is a copy
92% identical to econ-supply-demand — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
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.
Supply and Demand Analysis
Overview
Supply and demand is the foundational model for price determination in markets. It explains how prices emerge from the interaction of buyers (demand) and sellers (supply), and how external shocks or policy interventions shift the equilibrium.
Framework
IRON LAW: Shift vs Movement Along the Curve
A change in PRICE causes movement ALONG the curve (quantity changes).
A change in OTHER FACTORS (income, costs, preferences, technology) causes
the entire curve to SHIFT.
"Demand increased" means the demand CURVE shifted right (more quantity
at every price), NOT that quantity demanded increased due to a price drop.
Confusing these is the #1 error in supply-demand analysis.
IRON LAW: Ceteris Paribus — Change One Thing at a Time
When analyzing a shift, hold everything else constant. If both supply
and demand shift simultaneously, the effect on price or quantity (or both)
becomes ambiguous. Analyze each shift separately first, then combine.
Demand Curve Shifters (non-price factors)
- Consumer income (normal goods: ↑income → ↑demand; inferior goods: opposite)
- Prices of related goods (substitutes, complements)
- Consumer preferences and tastes
- Population / number of buyers
- Expectations of future prices
Supply Curve Shifters (non-price factors)
- Input costs (raw materials, labor, energy)
- Technology improvements
- Number of sellers
- Government policy (taxes, subsidies, regulations)
- Expectations of future prices
Analysis Steps
- Define the market: What good? What geographic/time scope?
- Identify the shock: What changed? Is it demand-side or supply-side?
- Determine shift direction: Does the curve shift left (decrease) or right (increase)?
- Find new equilibrium: Where do the new curves intersect?
- State the result: What happens to price and quantity?
Policy Analysis
| Intervention | Effect |
|---|---|
| Price ceiling (below eq.) | Shortage: Qd > Qs, black markets, quality reduction |
| Price floor (above eq.) | Surplus: Qs > Qd, waste, inefficiency |
| Per-unit tax | Supply shifts left by tax amount, price rises (split between buyer and seller based on elasticity) |
| Subsidy | Supply shifts right by subsidy amount, price falls |
| Tariff | Import supply shifts left, domestic price rises |
What ships with it
3 files 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.
- 9d ago First seen · 117 lines · 99 tokens per session scan A 2573935531c9
"econ-supply-demand" is a skill published in the GitHub repository charlieviettq/awesome-agent-skill (26 stars, last pushed 1mo ago), licensed MIT. It adds 99 tokens to every session and 1,130 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to econ-supply-demand, differing in 8 lines, and is treated as a copy.
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