Show HN: ForthWrite – Email AI that learns your voice from every edit you send (www.forthwrite.ai)

ForthWrite has launched an innovative email AI assistant that dynamically learns user writing styles through a sophisticated feedback loop, addressing a common limitation in existing email tools. Unlike traditional email assistants that offer static outputs based on user prompts, ForthWrite leverages a combination of retrieval-augmented generation (RAG) and a unique feedback mechanism to curate personalized writing examples from the user’s previous emails automatically. This approach helps the AI to generate replies that are not just polished but truly resemble the user's voice, providing a more authentic interaction. The technical workings behind ForthWrite center on embedding past emails, optimizing retrieval with metrics like cosine similarity and Maximal Marginal Relevance (MMR), and employing a word-level longest common subsequence analysis to capture subtle stylistic changes. A continuous feedback loop allows the tool to self-improve without collapsing under the success of fewer edits, ensuring that the model remains responsive to evolving writing habits. This development is significant for the AI/ML community as it demonstrates an effective integration of feedback-driven learning in consumer-scale applications, potentially reshaping how AI can assist in personal communication.