Most prompts work once. FORTUNA prompts are regression-tested, schema-enforced, and versioned for systems where inconsistency has a cost.
A prompt that works once
is not a system.
Inconsistent outputs, silent failures, and model drift compound quietly — until they break production. FORTUNA is built to eliminate that surface area.
No community submissions.
Every prompt in the catalog is hand-selected and individually engineered — not crowd-sourced, not AI-generated, not outsourced.
Not a marketplace. Every prompt goes through the full engineering process.
Tested against failure.
Regression-tested across evaluation sets. Failure modes are documented, not ignored. You get a prompt that has been broken intentionally — and hardened against it.
30+ evaluation inputs per prompt · 15–25 refinement cycles.
Versioned for model drift.
Model updates change output behavior. FORTUNA prompts are re-tested when that happens. Your purchase includes every future version.
Re-tested within 14 days of major model changes. No extra charge.
The difference, made visible.
Unengineered prompts produce filler, clichés, and unpredictable formats. FORTUNA prompts enforce deep psychological levers and strict data schemas.
# Output varies wildly · Filled with AI clichés
"Sure! Here is a strategy for your SaaS:
1. Unlock synergy with social media:
Post daily to build a vibrant community.
2. Revolutionize your content:
Share your innovative ideas.
3. Seamlessly engage users:
Reply to comments to show you care.
In conclusion, consistency is key! Let me know if you need more help."
# Deterministic JSON · Strict psychological rules
{ "campaign_architecture": { "primary_lever": "Cost of Inaction (COI)", "audience_friction": "Migration risk perception" }, "deliverable": { "channel": "LinkedIn Cold Outbound", "hook_structure": "Pattern Interrupt → Quantified Pain", "copy_exact": "Your dev team spends 14h/week maintaining legacy auth. We automate it in 20 mins. Worth a look?" }, "quality_assurance": { "banned_words_detected": 0, "verbosity_score": "minimal", "schema_validation": "PASSED" } }
What's inside every
FORTUNA prompt
Not a template. Not a one-liner. An engineered artifact designed for production logic.
Prompt Body
500–1,500 words of engineered instructions — role context, explicit constraints, and rigorous step-by-step logic.
Structured Schema
JSON format or clearly defined output structure so downstream systems receive predictable data.
Failure Modes
Edge cases identified during testing, written down so you don't discover them in production.
Model Compatibility Notes
Tested on GPT-4o, Claude 3.7 Sonnet, and Gemini 1.5 Pro. Behavioral differences noted per model family.
Version History
Every future re-test and update is included. No re-buy.
Ship AI into real systems.
Trusted by teams that ship.
FORTUNA prompts are running in production at leading agencies, SaaS companies, and research firms.
"We were spending hours a week just cleaning up hallucinated JSON structures from our data pipeline. Dropped the FORTUNA schema-enforced prompt in, and the failure rate went to absolute zero."
Marcus T.
Lead Data Engineer
"The difference between a generic ChatGPT prompt and these is night and day. The psychological frameworks built into the cold outbound prompts immediately lifted our reply rate."
Sarah K.
Growth Lead
"Finally, prompts that are treated like software. The documented failure modes and edge cases included with every download show an insane level of engineering rigor."
David R.
AI Integration Agency
Two formats. One standard.
Whether you need a single precision instrument or a complete topic collection — the engineering standard is identical.
Common questions
Answered without marketing language.
What separates FORTUNA prompts from everything else on the market?
Most prompts are written once, never tested, and never updated. FORTUNA prompts are engineered artifacts: each one carries explicit role context, structured output constraints, documented failure modes, and a regression-tested evaluation baseline. They are designed to behave predictably under production load — not just in a single demo run.
Can I integrate FORTUNA prompts into commercial systems or proprietary workflows?
Yes. Every FORTUNA prompt is licensed for unrestricted commercial use. Integrate into agents, pipelines, closed-source products, or client-facing systems — no attribution required.
What happens when models change? Do I pay again for updates?
No. Every purchase includes access to all future versions of that prompt. When a model update changes output behavior, the prompt is re-tested and updated accordingly. You receive the improvement automatically — no extra cost.
Who authors FORTUNA prompts?
Every prompt in the FORTUNA catalog is individually engineered — no community submissions, no AI-generated content, no outsourcing. Each prompt is the result of deep use-case research, multi-model testing, and documented production validation. The catalog is intentionally selective: only prompts that clear the full engineering standard ship.