PrePrompt

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Feature	PrePrompt
STOA Rating	6.0
Description	PrePrompt is an open-source tool that sits between you and your LLM inside Claude Code and Cursor. It intercepts every prompt you type, scores its clarity in under 1ms using local Python heuristics, and rewrites vague requests into detailed technical specs before they reach the model. Over time it learns your tech stack — framework, language, database, style — and injects that context automatically into every optimization without you having to repeat yourself.
Strengths	•MIT licensed and fully open source — no lock-in, no subscription •Near-zero latency classifier means clean prompts pass through untouched with no slowdown •Stack memory compounds over sessions — PrePrompt gets smarter about your codebase automatically •Works inside tools you already use (Claude Code, Cursor) without changing your workflow
Weaknesses	•Currently in beta — expect rough edges and occasional instability •Each optimization triggers a Claude Haiku API call, which costs roughly $0.001 per prompt you pay yourself •Stack memory is local only — no team sharing or cross-machine sync •Setup requires git clone and a shell script — not a one-click install
Key Features	•Intercepts prompts in Claude Code and Cursor before they reach the LLM — no workflow change needed •Scores prompt clarity 0–100 in under 1ms using local Python heuristics with no API call •Rewrites flagged prompts (score ≥38) with Claude Haiku, injecting your learned tech stack as context •Stores your stack preferences locally — framework, language, database — and resets automatically when you switch projects
Pricing	Free tier available Free Tier
Best For	All industries
AI Features	AI-Powered Uses Claude Haiku to rewrite vague prompts into precise technical specifications; learns and injects your tech stack context automatically across sessions
Categories	AI Tools & AssistantsBuild with AI
STOA Verdict	PrePrompt solves a real, daily problem — vague prompts lead to wasted rework and token spend. If you live in Claude Code or Cursor, plugging it in is worth trying. It's free to self-host, though you'll pay small Haiku fees for each rewrite. Being a public beta means it's promising but not yet polished.
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PrePrompt

6.0AI

PrePrompt is an open-source tool that sits between you and your LLM inside Claude Code and Cursor. It intercepts every prompt you type, scores its clarity in under 1ms using local Python heuristics, and rewrites vague requests into detailed technical specs before they reach the model. Over time it learns your tech stack — framework, language, database, style — and injects that context automatically into every optimization without you having to repeat yourself.

Strengths

•MIT licensed and fully open source — no lock-in, no subscription
•Near-zero latency classifier means clean prompts pass through untouched with no slowdown
•Stack memory compounds over sessions — PrePrompt gets smarter about your codebase automatically
•Works inside tools you already use (Claude Code, Cursor) without changing your workflow

Weaknesses

•Currently in beta — expect rough edges and occasional instability
•Each optimization triggers a Claude Haiku API call, which costs roughly $0.001 per prompt you pay yourself

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PrePrompt

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Key Features