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 GiangGiangTran/ba-skills --skill business-fundamentalsgit clone --depth 1 https://github.com/GiangGiangTran/ba-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/gianggiangtran/ba-skills/business-fundamentals)<a href="https://agentmods.dev/skills/gianggiangtran/ba-skills/business-fundamentals"><img src="https://agentmods.dev/badge/skills/gianggiangtran/ba-skills/business-fundamentals/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/gianggiangtran/ba-skills/business-fundamentals"><img src="https://agentmods.dev/badge/skills/gianggiangtran/ba-skills/business-fundamentals.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 | $0.00046 | $0.02117 |
| Opus 5 | $0.00023 | $0.01059 |
| Sonnet 5 | $0.00009 | $0.00423 |
| Haiku 4.5 | $0.00005 | $0.00212 |
Grade A, and why
business-fundamentals 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 12d 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 — 315 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Business Fundamentals for BA
Every requirement has business impact. Understand the math.
What is Business Domain Knowledge?
Definition: Understanding how the business makes money, generates value, and measures success - the financial and operational foundations.
Why it matters:
- Bad prioritization: Build features nobody will pay for
- Missed opportunities: Don't recognize high-value features
- Weak business cases: Can't justify investment to executives
- Wrong metrics: Measuring vanity metrics, not real impact
When to Use:
- ✅ Evaluating business case for initiative
- ✅ Prioritizing features by business value
- ✅ Understanding customer economics
- ✅ Analyzing financial impact
- ✅ Setting success metrics tied to business
3 Core Business Model Concepts
1. How Does the Company Make Money?
Different business models, different priorities:
Subscription/SaaS:
- Key metric: MRR (Monthly Recurring Revenue)
- Priorities: Reduce churn, increase ARPU (Average Revenue Per User)
- Customer lifetime value matters more than acquisition cost
Transactional (Marketplace):
- Key metric: GMV (Gross Merchandise Volume)
- Priorities: Increase transaction volume, take rate
- Liquidity (supply + demand) matters most
Freemium:
- Key metric: Conversion rate (Free → Paid)
- Priorities: Maximize free user base, conversion funnel
- Balance: Too aggressive → low adoption, Too passive → no revenue
Advertising:
- Key metric: CPM (Cost Per Mille), CTR (Click-Through Rate)
- Priorities: Maximize time-on-site, ad placements
- User experience vs ad density trade-off
See: references/business-models.md
2. Unit Economics (The Math That Matters)
Every business needs this math to work:
For SaaS Business:
Customer Acquisition Cost (CAC): $500
= Sales + Marketing spend / New customers
Monthly Subscription Price: $100
Gross Margin: 80%
= Revenue - COGS / Revenue
Monthly Churn Rate: 5%
= (Customers lost / Starting customers) / Month
Lifetime Value (LTV): $1,600
= (Monthly Price × Gross Margin) / Monthly Churn
LTV/CAC Ratio: 3.2
= $1,600 / $500
Rule of Thumb: LTV/CAC should be ≥ 3
Status: ✓ Unit economics work!
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.
- 12d ago First seen · 315 lines · 46 tokens per session scan A 9f41a375e412
business-fundamentals is a skill published in the GitHub repository GiangGiangTran/ba-skills (6 stars, last pushed 7mo ago), licensed MIT. It adds 46 tokens to every session and 2,117 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 2026-08-31.
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