PrePrompt
rewrites vague prompts before they reach the LLM
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HN · launched Apr 28, 2026 · 23 upvotes (top 23%) · 0 views
Niche: prompt engineering and management tools · 173 launches, 13 in the last 7 days ▼ -19% · Explore this niche →
Category and tags
- Horizontal
- Agent / copilot
- Prosumer
- AI-native
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 173 launches in prompt engineering and management tools →
Could you build this?
Yes The product is a Chrome extension that captures input text from a web textfield, calls a fast LLM API to rewrite it, and replaces the input value.
Discussion
9 comments analyzed.
Competitors mentioned: Claude subscription/API, Prompt extension tools
Concerns raised: Automatic prompt optimization may go in wrong direction, Doesn't track accept/reject metrics yet, May not work well for clarification-based workflows
Feature requests: Dialog clarification mode, Accept/reject tracking for optimizations, Automatic vagueness detection to trigger clarification mode
Competitors
Other products that read as similar to this one : 901 launches clear the similarity bar, closest 8 shown.
Attention rank: #187 of 902 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 180 days after the earliest competitor.
- CTON: JSON-compatible, token-efficient text format for LLM prompts · hn · 2025-11-20 · 13 upvotes · similarity 0.66
- Tokensift, an open-sourced token-efficiency linter for LLM prompts · hn · 2026-08-29 · 6 upvotes · similarity 0.66
- prompt-poet · github · 2026-11-05 · 50 upvotes · similarity 0.61
- An LLM translator whose source is a single prompt · hn · 2026-05-26 · 5 upvotes · similarity 0.58
- ReasonGate- An explainable gate that blocks LLM prompt injection · hn · 2026-07-16 · 7 upvotes · similarity 0.57
- jevals · hn · 2026-09-20 · 47 upvotes · similarity 0.54
- litjev · github · 2026-09-17 · 36 upvotes · similarity 0.53
- Promptloop · hn · 2026-05-29 · 13 upvotes · similarity 0.53
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