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LLM Persona & Custom Instruction Marketplace
A browser extension or web platform that provides highly optimized, tested 'Custom Instructions' for ChatGPT and Claude. It helps users bypass annoying default behaviors (like CBT exercises, overly verbose answers, or moralizing) by injecting expertly crafted system prompts.
Why this matters
A browser extension or web platform that provides highly optimized, tested 'Custom Instructions' for ChatGPT and Claude. It helps users bypass annoying default behaviors (like CBT exercises, overly verbose answers, or moralizing) by injecting expertly crafted system prompts.
- · Built for Power users of ChatGPT/Claude who are annoyed by default AI behaviors but don't want to spend hours testing prompt engineering..
- · Most likely monetization: One-time purchase / Marketplace fee.
Score Breakdown
Market Signal
Differentiation
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Validate
Promising signals, but needs confirmation. Create a landing page, collect email sign-ups, then decide.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
LLM Persona & Custom Instruction Marketplace
Sub-headline
A browser extension or web platform that provides highly optimized, tested 'Custom Instructions' for ChatGPT and Claude. It helps users bypass annoying default behaviors (like CBT exercises, overly verbose answers, or moralizing) by injecting expertly crafted system prompts.
Who It's For
For Power users of ChatGPT/Claude who are annoyed by default AI behaviors but don't want to spend hours testing prompt engineering.
Feature List
✓ Library of tested custom instructions (e.g., 'No Therapy Mode', 'Direct Coder', 'Creative Writer') ✓ One-click sync to ChatGPT via browser extension ✓ A/B testing of prompts to ensure they bypass AI safety layers effectively
Where to Validate
Share your landing page in r/r/ChatGPT — that's exactly where these pain points were discovered.
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Community Voices
Real quotes from Reddit comments that inspired this opportunity
- “breathing exercises make me irrationally rage for some reason”
- “It’s making me fucking insane”
- “All chatGPT is doing is practicing CBT. I didn’t like it when my shrink did it and don’t appreciate it from Chat GPT”
- “you could have monsters coming to tear you apart and eat you and the AI would just give you breathing instructions.”
- “AI aren’t always great at negative instructions. If you just tell them 'don’t do this' they sometimes default back to trained behavior”
- “which in this case is that safety layer you’re triggering.”
Other opportunities in the same theme
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