OpenViking

• Open-source context database for AI agents that organizes memories, resources, and skills as a virtual filesystem addressed via the viking:// protocol ( volcengine/OpenViking).
• Maintained by Volcengine (ByteDance’s cloud subsidiary)
  • 27.1k stars

Rather than querying a black-box vector store, an agent navigates a deterministic viking:// hierarchy of directories and files, each carrying its own abstraction layers ( volcengine/OpenViking).

• Replaces opaque similarity queries with a browsable, addressable filesystem
• Directories hold resources, user memories, preferences, skills, and peer contexts
• Every path exposes deterministic, reproducible retrieval trajectories

• L0 — abstract
• L1 — overview
• L2 — details
• Layers load on demand, keeping input tokens low without losing global structure

• Directory-recursive retrieval preserves surrounding context around a hit
• Trajectories are observable — every read is a traceable path, useful for debugging
• Session memory is automatically extracted into long-term storage between runs

• OpenViking Server — HTTP backend
• ov — CLI client
• VikingBot — agent framework
• OpenViking Helper — desktop console (macOS/Windows)
• Integrations for Claude Code, Codex, Cursor, and other coding agents

• 80–83% accuracy on user-memory tasks with OpenViking vs 24–57% without it (per repo README)