Zero-install persistent memory brain for Claude Code that stops the model from re-asking and re-deriving across sessions. Four MCP tools (mem_wakeup, mem_record_decision, mem_recall_decisions, mem_remember) plus Stop and PreCompact hooks automatically preserve context. SQLite FTS5 default backend requires no extras — pip install gr0m-mem and it works. ChromaDB + Ollama semantic retrieval available on the semantic branch. Includes temporal knowledge graph with mandatory as_of filtering, per-corpus isolation, and a loop-prevention protocol benchmarked at 100% in CI.