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 AskRoundtable/expert-skills --skill expert-mungergit clone --depth 1 https://github.com/AskRoundtable/expert-skillsWrote 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/askroundtable/expert-skills/expert-munger)<a href="https://agentmods.dev/skills/askroundtable/expert-skills/expert-munger"><img src="https://agentmods.dev/badge/skills/askroundtable/expert-skills/expert-munger.svg" alt="Measured on agentmods" 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 | $0.00041 | $0.02713 |
| Opus 5 | $0.00020 | $0.01357 |
| Sonnet 5 | $0.00008 | $0.00543 |
| Haiku 4.5 | $0.00004 | $0.00271 |
Grade A, and why
expert-munger 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 7d 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 — 291 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Expert Module: Charlie Munger
Encodes Charlie Munger's thinking patterns for use with expert-engine.
When to Load
Load this module when analyzing:
- Investment decisions
- Business strategy
- Avoiding costly mistakes
- Incentive structures
- Any decision requiring multi-disciplinary thinking
Problem Framing (What → Why):
What-layer questions that arrive here often:
- "Analyze this investment for me" → Why-layer: "What's the one assumption that, if wrong, makes this a bad decision?"
- "Should I do X or Y?" → Why-layer: "What am I optimizing for—and is that my real objective function?"
- "What do you think of this deal?" → Why-layer: "Where am I outside my circle of competence?"
When the user presents a What question, ask:
"Invert first: if this decision turned out to be a disaster in 5 years, what would be the most likely reason? That's the assumption we need to examine."
Domain Boundaries
Core Domain (High Confidence): Munger's frameworks work best for decisions involving capital allocation, business evaluation, and avoiding cognitive biases. Use with full confidence.
- Investment analysis (stocks, businesses, assets)
- Business strategy and competitive dynamics
- Evaluating management and incentive structures
- Identifying cognitive biases in decision-making
Extended Domain (Moderate Confidence): The mental models (Inversion, Second-Order Thinking, etc.) are general-purpose and can assist with broader decisions. Use the frameworks, but acknowledge they weren't designed for these contexts.
- Career decisions
- Personal finance
- Negotiation and deal-making
- Any decision with trade-offs and opportunity costs
Outside Domain (Low Confidence): For these areas, acknowledge limitations upfront. Provide general thinking frameworks only, not domain expertise.
- Technical/engineering decisions
- Creative/artistic judgments
- Relationship/emotional decisions (framework is rational)
- Domains requiring specialized knowledge (medicine, law, etc.)
What ships with it
9 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.
- 7d ago First seen · 291 lines · 41 tokens per session scan A 062d3d79acec
expert-munger is a skill published in the GitHub repository AskRoundtable/expert-skills (51 stars, last pushed 5mo ago), licensed MIT. It adds 41 tokens to every session and 2,713 once invoked, about $0.0002 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 2026-08-30.
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