Ejentum

Ejentum context server for Zed

A Zed extension that exposes the Ejentum Reasoning Harness as an MCP context server. Ejentum is a library of 679 cognitive operations engineered in natural language, organized across four harnesses. Each harness call retrieves a task-matched scaffold rather than serving a fixed template: a named failure pattern, an executable procedure, suppression vectors that block the obvious shortcut, and a falsification test for self-verification. The assistant ingests the scaffold and writes from it, addressing attention decay, sycophantic collapse, hallucination drift, and reasoning decay.

Four tools are exposed:

• reasoning for analytical, diagnostic, planning, multi-step questions
• code for codegen, refactor, review, debugging, architecture choices
• anti-deception when the prompt pressures the assistant to validate, certify, or soften an honest assessment
• memory for sharpening an observation already formed about cross-turn drift

Install

Once published, install through the Zed extensions panel (cmd+shift+x / ctrl+shift+x).

Configure

Add your Ejentum API key to Zed settings:

{
  "context_servers": {
    "ejentum-mcp": {
      "settings": {
        "ejentum_api_key": "YOUR_KEY_HERE"
      }
    }
  }
}

Free tier (30-day trial, no card) at ejentum.com/pricing.

Hosted alternative

This extension bundles the ejentum-mcp npm package and runs it as a stdio subprocess inside Zed. If you'd rather avoid the local subprocess (no npx install, no Node version pinning), the same four harness tools are also hosted at https://api.ejentum.com/mcp with Bearer auth via your EJENTUM_API_KEY. Most Zed users will prefer this extension (tighter integration, no extra MCP-client configuration needed); the hosted endpoint is documented here for users who want to route through Zed's HTTP-capable MCP support, or who run Zed alongside other clients (n8n, custom HTTP-MCP agents) sharing one key.

License

MIT.