Memory Nexus for Claude Code

Persistent knowledge layer for Claude Code. Store context, retrieve briefings, and maintain continuity across sessions.

Installation

1. Create an account at memory-nexus.org

2. Generate an API key from your account dashboard

3. Set your API key as an environment variable:

   export MEMORY_NEXUS_API_KEY="your-api-key-here"

4. Add this plugin to Claude Code

Related MCP server: nexus-mcp

Features

• Automatic Project Detection: Recognizes your git project and loads relevant context

• Session Briefings: Get structured directives, objectives, and knowledge at session start

• Semantic Search: Find memories by meaning, not keywords

• Continuity: Switch between Claude, Codex, or any other platform while maintaining context

• Multi-tier Subscriptions: Solo ($7/month), Crew ($49/month), Fleet ($199/month)

Available Commands

• /memory-nexus status — Check account status and quota

• /memory-nexus search [query] — Search stored memories

• /memory-nexus forget [id] — Delete a memory

• /memory-nexus briefing — Get project briefing

• /memory-nexus account — Manage account and billing

How It Works

When you start a new Claude Code session:

1. Automatic Project Detection: The plugin detects your git repository and generates a unique project hash

2. Session Start Hook: Your project's stored context is retrieved from Memory Nexus

3. Briefing Injection: Directives (rules), objectives (intent), and knowledge (context) are automatically injected as additional context

4. Seamless Continuity: You can switch to another Claude instance or Codex, use the same API key, and get a coherent handoff without manual recap

Pricing

No free tier. No free trial.

Configuration

Set these environment variables:

• MEMORY_NEXUS_API_KEY (required) — Your API key from the dashboard

• MEMORY_NEXUS_API_BASE (optional) — API endpoint, defaults to https://api.memory-nexus.org

Architecture

This plugin includes:

• SessionStart Hook (hooks/session_start_hook.sh) — Detects project, calls session_start endpoint, injects briefing

• MCP Server Bridge (.mcp.json) — Connects to Memory Nexus Python MCP server for tool calls

• Skill Definition (skills/memory-nexus/SKILL.md) — User-facing commands and documentation

• Plugin Metadata (.claude-plugin/plugin.json) — Plugin registration with Claude Code

Troubleshooting

"No API key found"

• Set MEMORY_NEXUS_API_KEY environment variable and restart Claude Code

"Project hash not detected"

• Make sure you're working in a git repository

• The hook will silently skip if not in a git project

"Briefing is empty"

• This is the first session for your project. Start storing memories with /memory-nexus commands.

• The briefing will grow as you add context.

Learn More

Visit memory-nexus.org for the full documentation.