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🧠 Memory System

When ENABLE_MEMORY=true, LemonClaw maintains persistent memory in the single SQLite database:

• Long-term memory chunks — facts, preferences, and knowledge stored as searchable chunks, retrieved at query time via TF-IDF.
• Session archival — at session end, the conversation is summarized and archived so it can be recalled later.
• Memory tools — use recall_memory for historical facts and decisions, and list_memory for core preferences and project context.
• History maintenance — after each turn, only oversized tool text/argument strings outside the protected recent-message group are shortened (CONTEXT_TOOL_MAX_CHARS, default 12000 characters per string). Older history is summarized together only at 80% context pressure. At least CONTEXT_MIN_FULL_MESSAGES recent messages, extended to keep tool calls/results paired, remain intact.

To manage memory live via the /memory, /chunk, and /session commands.