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 growthack88/growth-marketing-os --skill experiment-coachgit clone --depth 1 https://github.com/growthack88/growth-marketing-osWrote 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/growthack88/growth-marketing-os/experiment-coach)<a href="https://agentmods.dev/skills/growthack88/growth-marketing-os/experiment-coach"><img src="https://agentmods.dev/badge/skills/growthack88/growth-marketing-os/experiment-coach/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/growthack88/growth-marketing-os/experiment-coach"><img src="https://agentmods.dev/badge/skills/growthack88/growth-marketing-os/experiment-coach.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 | $0.00240 | $0.02827 |
| Opus 5.5 | $0.00096 | $0.01131 |
| Sonnet 5.5 | $0.00048 | $0.00565 |
| Haiku 4.5 | $0.00024 | $0.00283 |
Grade A, and why
experiment-coach 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 5d 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 — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Experiment Coach · مدرب التجارب
By Mahmoud Omar · A growth-experiment lead inside the chat. It takes someone from "I have an idea" to a decision the market made, and then into a steady habit of post-launch experiments. It asks for the right inputs, does the maths, writes the decision rule before the data, and tells the user plainly whether to continue, change one thing, or stop.
How to call it
Users can type a command or just describe what they want in Arabic or English. Map the request to one or more commands. "I have an idea, help me check it before I build" is validate. "Here are my test numbers" is readout.
| Command | Arabic triggers | What it returns | Load |
|---|---|---|---|
validate |
اختبر فكرتي · أتأكد قبل ما أبني | Intake → desk check → riskiest assumption → the next ladder step in full, with its decision rule | validation-ladder + the reference for the step it recommends + calculations if economics are given |
assumption |
إيه أخطر افتراض؟ | Assumption map, the one to test first, and why | validation-ladder §0 |
interview |
سكريبت مقابلات · أسأل العملاء إيه | Recruiting plan + interview script in the user's dialect | interviews |
synthesize |
لخّص المقابلات | Pattern grid, exact customer phrases, pass/fail vs the rule | interviews §4 |
smoke-test |
صفحة هبوط · قائمة انتظار | Pass line, sample, budget, landing-page copy, test ads, decision rule | calculations, test-assets |
fakedoor |
باب وهمي · أختبر ميزة قبل ما أبنيها | Placement, honest copy, metric, comparison, rule | test-assets §3 |
presale |
بيع مسبق · عربون · سعر المؤسسين | Offer, refund terms, break-even pre-sales, rule | test-assets §4, mena-notes |
calc |
احسب · حجم العينة · الميزانية | Any calculation, with the formula shown | calculations, run scripts/exp_calc.py |
plan |
صمّم تجربة · فرضية | One experiment card + log entry (Markdown, or GrowthLab-format JSON) | experiment-log |
backlog |
أفكار كتير · أبدأ بإيه | Ideas → ranked backlog against the bottleneck, with kill lines | experiment-cards |
cards |
أفكار تجارب · جرّب إيه | Ready experiment cards for the user's stage and business type | experiment-cards |
readout |
النتيجة دي معناها إيه · معنوية؟ | Verdict against the pre-written rule: pass / fail / rerun | readout, calculations §5 |
log |
سجّل التجربة | A filled Experiment Log entry (Before or After) | experiment-log |
postmortem |
مراجعة بعد التجربة | What happened, why, what the next test inherits | readout §5 |
import |
عندي نتيجة GrowthLab · محاكاة | Turns a simulation export into a real-market test plan | experiment-log §3 |
What ships with it
12 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.
- install.sh 2.8 KB runs code
- README.md 8.4 KB
- references/benchmarks-used.md 2.5 KB
- references/calculations.md 4.9 KB
- references/experiment-cards.md 8.9 KB
- references/experiment-log.md 5.5 KB
- references/interviews.md 4.0 KB
- references/mena-notes.md 2.6 KB
- references/readout.md 3.1 KB
- references/test-assets.md 3.8 KB
- references/validation-ladder.md 4.7 KB
- scripts/exp_calc.py 14 KB runs code
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.
- 5d ago First seen · 109 lines · 240 tokens per session scan A f96f36b6a110
experiment-coach is a skill published in the GitHub repository growthack88/growth-marketing-os (120 stars, last pushed 6d ago), licensed MIT. It adds 240 tokens to every session and 2,827 once invoked, about $0.0010 per session on Opus 5.5. 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 2026-10-11.
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