How to Share Context Across AI Tools
goget_justgocrazy · reddit · 2026-07-15
While using ChatGPT, Claude, Codex, Claude Code, Notion, and custom desktop apps for planning, writing, research, weekly reviews, learning, and decision-making, the author realized that the real challenge isn't "syncing a project," but maintaining a shared context layer across these tools.
They experimented with using a Notion log database as a single source of truth: after completing major tasks, they'd have AI summarize what happened, what changed, and the next steps, allowing other tools to read these logs before proceeding. However, manual log maintenance became a burden—prone to being forgotten, duplicated, or outdated—and downstream AI tools often failed to fetch the correct context.
The ideal system would differentiate between:
- Stable personal context
- Domain/project context
- Temporary session details
- Long-term memorable decisions and events
Ultimately, they are asking if anyone has developed a working solution that enables ChatGPT, Claude, Codex, Claude Code, and custom apps to automatically read and write relevant contexts. Candidate approaches mentioned include Markdown+Git, Obsidian, Notion, MCP, SQLite, knowledge graphs, automated chat summaries, RAG, and custom memory services.
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