Session Memory Feature Introduced in Claude Code
The latest versions of Claude Code introduce a new feature: Session Memory. Designed to assist developers with managing larger interactive sessions, it automatically generates and maintains a summary.md file in each project directory. While disabled by default, you can enable and customize it using tweakcc.
Key Details
When enabled, Session Memory creates a summary.md file located at ~/.claude/projects/{sanitized-project-path}/{session-id}/session-memory/summary.md. This file is updated based on specific thresholds: session size reaching 10k tokens and 3 tool calls, with subsequent updates occurring after 5k additional tokens and 3 more tool calls.
The tweakcc tool allows customization of these thresholds using environment variables:
CC_SM_MINIMUM_MESSAGE_TOKENS_TO_INIT=200– Tokens required before first extraction; defaults to 10,000.CC_SM_MINIMUM_TOKENS_BETWEEN_UPDATE=200– Tokens required between updates; defaults to 5,000.CC_SM_TOOL_CALLS_BETWEEN_UPDATES=0– Tool calls required between updates; defaults to 3.CC_SM_PER_SECTION_TOKENS=3000– Max tokens for a section before a warning; defaults to 2,000.CM_SM_TOTAL_FILE_LIMIT=12000– Max tokens for the whole summary; default is 12,000.
Enabling the session memory feature involves running npx tweakcc@latest --apply and setting the necessary environment variables. This functionality targets developers handling medium to large interactive sessions where comprehensive activity tracking is beneficial.
📖 Read the full source: r/ClaudeAI
👀 See Also
memv: Open-Source Memory System for AI Agents
memv is an open-source memory system designed for AI agents that stores only unexpected information from interactions, reducing noise and redundancy.
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