Obsidian-Second-Brain Offers Persistent AI Memory Across Claude Code, Gemini, and Six Other Agents

A new open-source tool lets AI coding assistants maintain continuous knowledge across sessions by storing memory as plain Markdown files in an Obsidian vault, automatically reconciling contradictions to keep facts accurate. Obsidian-second-brain, created by Eugeniu Ghelbur, addresses a fundamental frustration with AI agents: the need to re-explain projects, decisions, and context at the start of every interaction. The tool integrates with Claude Code, Codex, Gemini, OpenCode, Hermes, Pi, and other CLI agents, turning a free note-taking application into a shared memory system that persists across sessions.