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 getcrew44/crew44 --skill saas-economics-efficiency-metricsgit clone --depth 1 https://github.com/getcrew44/crew44Wrote 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/getcrew44/crew44/saas-economics-efficiency-metrics)<a href="https://agentmods.dev/skills/getcrew44/crew44/saas-economics-efficiency-metrics"><img src="https://agentmods.dev/badge/skills/getcrew44/crew44/saas-economics-efficiency-metrics/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/getcrew44/crew44/saas-economics-efficiency-metrics"><img src="https://agentmods.dev/badge/skills/getcrew44/crew44/saas-economics-efficiency-metrics.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 585 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
- medium Rogue Agent · line 612 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00032 | $0.06656 |
| Opus 5 | $0.00016 | $0.03328 |
| Sonnet 5 | $0.00006 | $0.01331 |
| Haiku 4.5 | $0.00003 | $0.00666 |
Grade A, and why
saas-economics-efficiency-metrics 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 11d 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 — 695 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Purpose
Determine whether your SaaS business model is fundamentally viable and capital-efficient. Use this to calculate unit economics, assess profitability, manage cash runway, and decide when to scale vs. optimize. Essential for fundraising, board reporting, and making smart investment trade-offs.
This is not a finance reporting tool—it's a framework for PMs to understand whether the business can sustain growth, when to prioritize efficiency over growth, and which investments have positive returns.
Key Concepts
Unit Economics Family
Metrics that measure profitability at the customer level—the foundation of sustainable SaaS.
Gross Margin — Percentage of revenue remaining after direct costs (COGS).
- Why PMs care: A feature that generates $1M revenue at 80% margin is worth far more than $1M at 30% margin. Margin determines which features to prioritize.
- Formula:
(Revenue - COGS) / Revenue × 100 - COGS includes: Hosting, infrastructure, payment processing, customer onboarding costs
- Benchmark: SaaS 70-85% good; <60% concerning
CAC (Customer Acquisition Cost) — Total cost to acquire one customer.
- Why PMs care: Shapes entire go-to-market strategy. Determines which channels are viable and how much you can invest in product-led growth.
- Formula:
Total Sales & Marketing Spend / New Customers Acquired - Benchmark: Varies by model—Enterprise $10K+ ok; SMB <$500 target
- Include: Marketing spend, sales salaries, tools, commissions
LTV (Lifetime Value) — Total revenue expected from one customer over their lifetime.
- Why PMs care: Tells you what you can afford to spend on acquisition. Higher LTV enables premium channels and longer payback periods.
- Formula (simple):
ARPU × Average Customer Lifetime (months) - Formula (better):
ARPU × Gross Margin % / Churn Rate - Formula (advanced): Account for expansion, discount rates, cohort-specific retention
- Benchmark: Must be 3x+ CAC; varies by segment
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.
- 11d ago First seen · 695 lines · 32 tokens per session scan A ede80376bfd9
saas-economics-efficiency-metrics is a skill published in the GitHub repository getcrew44/crew44 (359 stars, last pushed 3mo ago), licensed MIT. It adds 32 tokens to every session and 6,656 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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