sdd2

v0.0.0

Spec-Driven Development, second generation — the SDD process plugin and its CLI.

Claude CodeAgent Plugins1 Skill

By unionalLicense: MIT1 GitHub starsUpdated last week

Directory evidence

Runtimes: Claude Code and Agent Plugins
Parsed components: 1 skill or MCP entry
Source updated: Oct 11, 2026
Manifest status: Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install sdd2 for Claude Code

Installs for the current user

claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install sdd2@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually

$ git clone https://github.com/cyberuni/cyber-sdd

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is packages/cyber-sdd/.

Plugin files

packages/cyber-sdd/

├── .claude-plugin/plugin.json
├── plugin.json
└── skills/sdd2/SKILL.md

Included Skills1

sdd2skills/sdd2/SKILL.md

Use this skill when the user explicitly invokes SDD 2 or cyber-sdd-2 — the second-generation Spec-Driven Development process. Routes a request to the sdd2 engine and reports what the scaffold can currently do.

Plugin manifests2

packages/cyber-sdd/.claude-plugin/plugin.json

{
  "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
  "name": "sdd2",
  "description": "Spec-Driven Development, second generation — the SDD process plugin and its CLI.",
  "author": {
    "name": "unional"
  },
  "homepage": "https://github.com/cyberuni/cyber-sdd",
  "repository": "https://github.com/cyberuni/cyber-sdd",
  "version": "0.0.0",
  "skills": "./skills"
}

packages/cyber-sdd/plugin.json

{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "sdd2",
  "displayName": "Cyber SDD 2",
  "version": "0.0.0",
  "description": "Spec-Driven Development, second generation — the SDD process plugin and its CLI.",
  "author": {
    "name": "unional"
  },
  "homepage": "https://github.com/cyberuni/cyber-sdd",
  "repository": "https://github.com/cyberuni/cyber-sdd.git",
  "license": "MIT",
  "keywords": [
    "sdd",
    "spec",
    "process",
    "cli"
  ],
  "skills": "./skills"
}