Build a searchable personal project wiki from your LLM chat memory

Executive Summary

Many knowledge workers—roughly the 200 million people in engineering, product, design, and consulting roles—lose hours each week rebuilding context because conversations, notes, and decisions are scattered across chat threads and siloed tools; conservatively this is a 5–10% productivity drag for teams and an avoidable source of rework. The problem is especially acute for remote and async teams who rely on chat-based workflows and have no durable, searchable project memory tied to the actual conversational artifacts that led to decisions. You could build a personal project wiki that continuously ingests an individual’s LLM chat history, indexes it with embeddings, and exposes a natural-language query layer plus condensed project summaries, decision timelines, and action-item extraction. Architecturally this is a hybrid local-first/secure-cloud product that supports encrypted storage, incremental vector indexing to keep costs proportional to change, and integrations to surface context into IDEs, PRs, and task trackers so the wiki becomes a low-friction habit rather than a separate app. The timing is favorable: long-context and persistent-memory models make durable model-context realistic, embedding and vector search costs have commodified retrieval, and a $60B addressable market (200M workers × $300 ARPU/year) means a clear revenue path if you can capture even a small percentage; the opportunity aligns with the provided market score (95) and revenue potential (94). To stand out you must solve data hygiene and trust—high-precision summarization, tight privacy defaults, and seamless capture across chat clients are stronger defensibilities than trying to out-feature generalist note apps; conversely, onboarding friction, relevance ranking, and convincing users to centralize private chats are the principal execution risks that will determine whether the idea scales.