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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.0.0] - 2025-10-09

🎉 Production Release: CortexGraph v1.0.0

This is the first production-ready release of CortexGraph (formerly CortexGraph), a temporal memory management system for AI assistants with human-like memory dynamics.

🚀 Major Features

Complete Rebranding

  • Renamed from CortexGraph to CortexGraph
  • Updated all references, paths, and documentation
  • Changed storage paths from ~/.stm/ to ~/.config/cortexgraph/ (XDG-compliant)
  • Updated command names from stm-* to cortexgraph-*
  • Updated environment variables from CORTEXGRAPH_ to CORTEXGRAPH_
  • Repository moved to https://github.com/prefrontal-systems/cortexgraph

Simplified Installation

  • UV Tool Install Support
  • One-command installation: uv tool install git+https://github.com/simplemindedbot/cortexgraph.git
  • Simplified MCP configuration: {"command": "cortexgraph"} (no more complex paths)
  • All configuration moved to ~/.config/cortexgraph/.env (not MCP config)
  • Automatic installation of all 7 CLI commands

Memory Consolidation

  • Algorithmic Memory Consolidation (consolidate_memories tool)
  • Smart content merging with duplicate detection
  • Preview mode to see proposed merges before applying
  • Apply mode to execute consolidation
  • Auto-detection of high-cohesion clusters
  • Metadata merging: tags, entities, timestamps, strength
  • Relation tracking via consolidated_from links
  • Strength bonuses based on cluster cohesion (capped at 2.0)
  • 100% test coverage (15 tests)

Privacy & Local Storage

  • Emphasized Local-First Design
  • All data stored locally (no cloud services, no tracking)
  • Human-readable JSONL format for short-term memory
  • Markdown files (Obsidian-compatible) for long-term memory
  • Git-friendly formats for version control
  • Complete user control and transparency

📦 Added

  • Migration tool (cortexgraph-migrate) to upgrade from old STM Server installations
  • Comprehensive contributing guide with platform-specific instructions
  • Windows/Linux tester recruitment documentation
  • Future roadmap documentation
  • Privacy and local storage documentation sections
  • ELI5 guide updates with simplified installation steps
  • All AI assistant instruction files (CLAUDE.md, AGENTS.md, GEMINI.md)

🔄 Changed

  • Storage paths: Migrated to XDG-compliant ~/.config/cortexgraph/
  • Command names: All CLI tools renamed from stm-* to cortexgraph-*
  • Configuration: Simplified MCP setup, all settings in .env file
  • Installation: UV tool install as recommended method
  • Documentation: Complete overhaul across all files

🐛 Fixed

  • .env.example updated with correct decay model parameters
  • LTM index path configuration
  • Python path requirements in documentation
  • Server initialization using mcp.run() instead of deprecated mcp.run_forever()

📚 Documentation

  • Complete documentation suite with consistent branding
  • README.md: Quick start, installation, configuration
  • CLAUDE.md: AI assistant instructions
  • CONTRIBUTING.md: Development guide
  • ELI5.md: Beginner-friendly explanation
  • docs/deployment.md: Production deployment
  • docs/architecture.md: System design
  • docs/api.md: Tool reference
  • docs/graph_features.md: Knowledge graph guide

🎯 Implementation Status

11 MCP Tools Implemented: 1. save_memory - Save memory with entities, tags, optional embeddings 2. search_memory - Search with temporal filtering and semantic similarity 3. search_unified - Unified search across STM and LTM 4. touch_memory - Reinforce memory (update last_used, use_count, strength) 5. gc - Garbage collect low-scoring memories 6. promote_memory - Promote high-value memories to long-term storage 7. cluster_memories - Find similar memories for consolidation 8. consolidate_memories - Algorithmic merge with preview/apply modes 9. read_graph - Return entire knowledge graph with memories and relations 10. open_memories - Retrieve specific memories by ID with relations 11. create_relation - Create explicit links between memories

7 CLI Commands: - cortexgraph - MCP server - cortexgraph-migrate - Migration from old installations - cortexgraph-search - Unified search across STM and LTM - cortexgraph-maintenance - Storage stats and compaction - cortexgraph-index-ltm - Index Obsidian vault - cortexgraph-backup - Git backup operations - cortexgraph-vault - Markdown file operations

💡 Core Innovations

  • Temporal Decay: Power-law (default), exponential, and two-component models
  • Reinforcement Learning: Memories strengthen with repeated access
  • Smart Prompting: Natural memory operations without explicit commands
  • Knowledge Graph: Entities, relations, and memory nodes
  • Two-Layer Architecture: STM (JSONL) + LTM (Markdown/Obsidian)

📄 License

MIT License - Full user control and transparency

[0.3.0] - 2025-10-07

Added

  • ELI5.md - Simple, beginner-friendly guide explaining what this project does and how to use it.
  • Decay models: power-law (default), exponential, and two-component with configurable parameters.
  • Unified search surfaced as an MCP tool (search_unified) alongside the CLI (cortexgraph-search).
  • Maintenance CLI (cortexgraph-maintenance) to show JSONL storage stats and compact files.
  • Tests for decay models, LTM index parsing/search, and unified search merging.
  • Deployment docs for decay model configuration and tuning tips.
  • Tuning cheat sheet and model selection guidance in README and scoring docs.

Changed

  • JSONL-only storage: removed SQLite and migration tooling.
  • Server logs now include the active decay model and key parameters on startup.
  • Standardized on Ruff for linting and formatting.

Removed

  • SQLite database implementation and migration modules.

[0.2.0] - 2025-01-07

  • JSONL storage, LTM index, Git integration, and smart prompting docs.