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 ekinciio/saas-growth-marketing-skills --skill web-app-growth-enginegit clone --depth 1 https://github.com/ekinciio/saas-growth-marketing-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/ekinciio/saas-growth-marketing-skills/web-app-growth-engine)<a href="https://agentmods.dev/skills/ekinciio/saas-growth-marketing-skills/web-app-growth-engine"><img src="https://agentmods.dev/badge/skills/ekinciio/saas-growth-marketing-skills/web-app-growth-engine/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/ekinciio/saas-growth-marketing-skills/web-app-growth-engine"><img src="https://agentmods.dev/badge/skills/ekinciio/saas-growth-marketing-skills/web-app-growth-engine.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 | $0.00098 | $0.02539 |
| Opus 5.5 | $0.00039 | $0.01016 |
| Sonnet 5.5 | $0.00020 | $0.00508 |
| Haiku 4.5 | $0.00010 | $0.00254 |
Grade A, and why
web-app-growth-engine scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
**PageSpeed data (`GOOGLE_API_KEY`):** if the user provides a Google API key, fetch real Core Web Vitals directly (e.g. with curl or WebFetch) - no script changes needed: How it starts
The opening of the file, as written. The whole thing — 304 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Audit Intro
When starting an audit (/web-app-growth-engine audit <url>), show this
intro before proceeding:
""" 📡 Web App Growth Engine
What I'll do: Fetch your signup/landing URL and analyze friction in the growth funnel.
What you'll get: → Signup friction score (lower = less friction) → Field-by-field form analysis → SSO and social login availability check → Trust signal evaluation
Output: Saved to WEB-GROWTH-AUDIT-REPORT.md Time: ~60 seconds.
Starting... """
Then proceed immediately.
Web App Growth Engine
A comprehensive skill for analyzing and optimizing SaaS web application growth funnels. This skill helps you evaluate signup flows, measure activation metrics, identify conversion bottlenecks, and design sustainable growth loops.
Commands
/web-app-growth-engine audit <url>
Performs a full web growth audit on the specified URL. This includes:
- Signup Flow Analysis - Evaluates the friction in your signup process
- Activation Metrics - Assesses how quickly users reach value
- Conversion Points - Identifies where users drop off
- Growth Loop Assessment - Checks for viral and retention loops
Usage:
/web-app-growth-engine audit https://example.com
Output includes:
- Signup friction score (0-100)
- Field-by-field analysis of the signup form
- SSO and social login availability
- Trust signal evaluation
- CTA effectiveness assessment
- Activation metric recommendations
- Growth loop opportunities
Report: Save output to WEB-GROWTH-AUDIT-REPORT.md
/web-app-growth-engine signup-flow <url>
Performs a focused signup flow friction analysis on the specified URL.
Usage:
/web-app-growth-engine signup-flow https://example.com/signup
What it analyzes:
- Number of form fields and required fields
- SSO options (Google, GitHub, Microsoft, etc.)
- Password requirements and complexity
- CAPTCHA presence
- Credit card requirements
- Trust signals (badges, testimonials, security icons)
- CTA button text and placement
- Progressive profiling implementation
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.
- 1mo ago First seen · 304 lines · 98 tokens per session scan A 531d6607ba6b
web-app-growth-engine is a skill published in the GitHub repository ekinciio/saas-growth-marketing-skills (14 stars, last pushed 3d ago), licensed MIT. It adds 98 tokens to every session and 2,539 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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