Cross-App AI Context Vault
A local-first context layer that captures conversations, prompts, and project facts from every AI tool and injects the relevant slice into whichever tool you're currently using, via MCP server and browser extension. Users define 'projects' once and every AI session starts warm.
- 0
- posts
- Confidence: 4 out of 5
- 0.82 model confidence
The problem
Indie hackers and knowledge workers juggle five or more AI tools (Claude, ChatGPT, Grok, Cursor, Gemini) and each one forgets everything the others know. One founder described how chat history, saved prompts, and integrations never carry over between apps, forcing constant re-explaining of project context.
Who it’s for
AI power users, indie hackers, developers using multiple LLM tools
Market
~1-5M AI power users and developers using multiple LLM tools globally
Source: external_knowledge
ChatGPT alone reports hundreds of millions of weekly users, and the subset of paying power users juggling multiple LLM subscriptions (Claude, ChatGPT, Cursor, Gemini) plausibly numbers in the low millions, concentrated among developers and indie hackers. This is an external-knowledge estimate since no evidence posts quantify the segment.
Who already tried
- Salvor
- LittlebirdAI
- Mem0
Tool-agnostic and repo/local-first: instead of being another AI app, it sits underneath all of them and syncs context bidirectionally.
What you’d build
Rough effort
220 hours
Stack
- TypeScript
- MCP SDK
- SQLite
- Chrome Extension APIs
- Node.js
Integrates with
- Claude
- ChatGPT
- Cursor
- Notion
- Slack
- VS Code