PrePrompt
rewrites vague prompts before they reach the LLM
Details
- External ID
- 47929978
- Source
- HN
- Company
- —
- Product
- PrePrompt
- Website domain
- preprompt.org
- Launched
- April 28, 2026
- Cohort
- —
- Upvotes
- 23
- Upvotes percentile
- 0.7712082262210797
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Enrichment
- Theme
- developer tools and programming utilities
- Vertical
- Horizontal
- Function
- Agent / copilot
- Audience
- Developer
- AI stance
- AI feature
- Project type
- Commercial product
- Normalized one-liner
- prompt optimization for llms
- Manually corrected
- False
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 — 345 launches clear the similarity bar, closest 8 shown.
Attention rank: #73 of 346 (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 0.65
- Tokensift, an open-sourced token-efficiency linter for LLM prompts · hn · 2026-08-29 · 6 upvotes · similarity 0.65
- An LLM translator whose source is a single prompt · hn · 2026-05-26 · 5 upvotes · similarity 0.57
- ReasonGate- An explainable gate that blocks LLM prompt injection · hn · 2026-07-16 · 7 upvotes · similarity 0.55
- jevals · hn · 2026-09-20 · 47 upvotes · similarity 0.52
- litjev · github · 2026-09-17 · 36 upvotes · similarity 0.51
- Promptloop · hn · 2026-05-29 · 13 upvotes · similarity 0.50
- ST-jeved · github · 2026-09-20 · 30 upvotes · similarity 0.50
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a agent / copilot tool for Agriculture yet.