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MCP server enabling persistent memory for Claude through a local knowledge graph - fork focused on local development
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# MCP Knowledge Graph
**Persistent memory for AI models through a local knowledge graph.**
Store and retrieve information across conversations using entities, relations, and observations. Works with Claude Code/Desktop and any MCP-compatible AI platform.
## Why ".aim" and "aim_" prefixes?
AIM stands for **AI Memory** - the core concept of this system. The three AIM elements provide clear organization and safety:
- **`.aim` directories**: Keep AI memory files organized and easily identifiable
- **`aim_` tool prefixes**: Group related memory functions together in multi-tool setups
- **`_aim` safety markers**: Each memory file starts with `{"type":"_aim","source":"mcp-knowledge-graph"}` to prevent accidental overwrites of unrelated JSONL files
This consistent AIM naming makes it obvious which directories, tools, and files belong to the AI memory system.
## CRITICAL: Understanding `.aim` dir vs `_aim` file marker
**Two different things with similar names:**
- `.aim` = **Project-local directory name** (MUST be named exactly `.aim` for project detection to work)
- `_aim` = **File safety marker** (appears inside JSONL files: `{"type":"_aim","source":"mcp-knowledge-graph"}`)
**For project-local storage:**
- Directory MUST be named `.aim` in your project root
- Example: `my-project/.aim/memory.jsonl`
- The system specifically looks for this exact name
**For global storage (--memory-path):**
- Can be ANY directory you want
- Examples: `~/yourusername/.aim/`, `~/memories/`, `~/Dropbox/ai-memory/`, `~/Documents/ai-data/`
- Complete flexibility - choose whatever location works for you
## Storage Logic
**File Location Priority:**
1. **Project with `.aim`** - Uses `.aim/memory.jsonl` (project-local)
2. **No project/no .aim** - Uses configured global directory
3. **Contexts** - Adds suffix: `memory-work.jsonl`, `memory-personal.jsonl`
**Safety System:**
- Every memory file starts with `{"type":"_aim","source":"mcp-knowledge-graph"}`
- System refuses to write to files without this marker
- Prevents accidental overwrite of unrelated JSONL files
## Master Database Concept
**The master database is your primary memory store** - used by default when no specific database is requested. It's always named `default` in listings and stored as `memory.jsonl`.
- **Default Behavior**: All memory operations use the master database unless you specify a different one
- **Always Available**: Exists in both project-local and global locations
- **Primary Storage**: Your main knowledge graph that persists across all conversations
- **Named Databases**: Optional additional databases (`work`, `personal`, `health`) for organizing specific topics
## Key Features
- **Master Database**: Primary memory store used by default for all operations
- **Multiple Databases**: Optional named databases for organizing memories by topic
- **Project Detection**: Automatic project-local memory using `.aim` directories
- **Location Override**: Force operations to use project or global storage
- **Safe Operations**: Built-in protection against overwriting unrelated files
- **Database Discovery**: List all available databases in both locations
## Quick Start
### Global Memory (Recommended)
Add to your `claude_desktop_config.json` or `.claude.json`. Two common approaches:
**Option 1: Default `.aim` directory (simple)**
```json
{
"mcpServers": {
"Aim-Memory-Bank": {
"command": "npx",
"args": [
"-y",
"mcp-knowledge-graph",
"--memory-path",
"/Users/yourusername/.aim"
]
}
}
}
```
**Option 2: Dropbox/cloud sync (portable)**
For accessing memories across multiple machines, use a synced folder. This is how the author of this MCP server keeps his own memories:
```json
{
"mcpServers": {
"Aim-Memory-Bank": {
"command": "npx",
"args": [
"-y",
"mcp-knowledge-graph",
"--memory-path",
"/Users/yourusername/Dropbox/ai-memory"
]
}
}
}
```
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Shane Holloman · Cello Ltd · New Zealand
39
Would you bet a product on this? Bounded 0–100 and slow moving.
matched fp:8e74939ba4768fc2, topic:knowledge-graph, name:knowledge graph, desc:knowledge graph
matched fp:8e74939ba4768fc2, topic:mcp, desc:mcp server