Preserve My Voice + Grammarly battle plan #4011

Originally written by @ccantynz-alt on GitHub.
Imported from https://github.com/ccantynz-alt/48co.v1/pull/26

Summary

• "Preserve My Voice" — users upload writing samples, AI learns their style
• Grammarly battle plan documented in STRATEGY.md
• Rewrite endpoint now injects voice context into Claude system prompt

Preserve My Voice — How it works

1. User uploads 20-50 writing samples (past emails, docs, messages)
2. Samples stored server-side, top 10 most recent used as context
3. When AI rewrites text, it reads the samples and preserves the user's tone
4. Result: grammar is fixed but writing still sounds like YOU, not corporate Grammarly

Why Grammarly can't copy this

Their model is one-size-fits-all, trained on generic English. Per-user voice preservation requires per-request context injection with a frontier LLM (Claude). Their GPT-3 era architecture can't do this without a complete rebuild.

https://claude.ai/code/session_01PBeNmPHrD2W6A2YKZRC7V3