knowledge-graph

name	knowledge-graph
description	Entity and relation tracking skill using MCP memory server patterns and local knowledge graph storage. Build persistent knowledge graphs of entities, relationships, and observations across agent sessions. Covers the MCP memory server (@modelcontextprotocol/server-memory), local JSON-based graphs, and entity-relation querying patterns for long-running agents.
version	1.0.0
model	sonnet
invoked_by	both
user_invocable	true
tools	["Bash","Read","Write","Edit","Glob","Grep"]
best_practices	["Always use entity IDs (not names) as stable references","Store observations with timestamps for temporal reasoning","Normalize entity types across all insertions","Use relation types that are directional (e.g., \"manages\" not \"related_to\")","Prune stale observations periodically to keep graph queryable"]
error_handling	graceful
streaming	not_applicable
verified	true
lastVerifiedAt	"2026-03-15T00:00:00.000Z"
source	builtin
trust_score	100
provenance_sha	999cb8a134ef1c94

Knowledge Graph

Overview

Build and query persistent knowledge graphs of entities, relationships, and observations across agent sessions. Enables agents to accumulate structured knowledge over time — tracking what they've learned about projects, people, codebases, and domains.

When to Invoke

Skill({ skill: 'knowledge-graph' }) when:

• Agent needs to remember structured facts across sessions
• Building a model of a codebase, project, or domain from observations
• Tracking relationships between people, systems, or concepts
• Implementing long-term memory that survives context resets

Option 1: MCP Memory Server (Recommended for Claude Agents)

The official MCP memory server provides a persistent knowledge graph accessible via tool calls.

Setup

npx -y @modelcontextprotocol/server-memory

Claude Desktop / settings.json config:

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-memory"],
      "env": {
        "MEMORY_FILE_PATH": ".claude/context/memory/knowledge-graph.json"
      }
    }
  }
}

MCP Memory Server Tools

Tool	Purpose