RunarForge: Open-Source MCP Server for Cross-Session Agent Memory
crlome · reddit · 2026-08-14
The author open-sourced RunarForge, an MCP server that provides AI coding agents with cross-session memory and a SQLite-backed Tree-sitter symbol graph of the codebase.
- Core Features: Parses the repo into a symbol graph accessible via 37 tools, supporting major agents like Claude Code and Cursor via standard stdio.
- Engineering Lesson: The author highlighted the danger of stale indices. If the graph isn't refreshed, the agent confidently returns outdated code structures, which is worse than having no tool at all.
- Solution: Implemented a verification mechanism using Git commits and working tree signatures. It forces a state comparison before reading, returning 'cannot judge' instead of a false positive if the baseline is missing. The system is stable with a 366ms median refresh time.
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