opencode-historian

Ingest user-provided files or folders into historian memories by extracting content, classifying it against available memory types, and storing useful knowledge through @historian. Use when the user wants to turn documents, screenshots, notes, code, or mixed source folders into persistent mnemonics.

Memory management by using the historian subagent to store, recall, and manage persistent memories across conversations. Use when you need to remember decisions, preferences, learnings, or retrieve stored context.