add

A software-development approach that coordinates multiple AI agents around written specifications and tests. TDD, or test-driven development, means writing tests to guide implementation and verify behavior.

In plain words
What is it for?
Use it for specification-led development, coordinated agent teams, test-driven work, review gates, human-agent collaboration, deployment, and learning across projects.
Why use it?
It organizes agent collaboration and adds checks for whether software matches its specification before it is shipped.

Plugin for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code
/plugin marketplace add MountainUnicorn/add
agentmods
npx agentmods add plugins/mountainunicorn/add/claude
Clone the repo
git clone --depth 1 https://github.com/MountainUnicorn/add

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin 91% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

add scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

91% identical to add — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

runtimes/claude/.claude-plugin/plugin.json · 25 lines

What it actually says

{
  "name": "add",
  "version": "{{VERSION}}",
  "description": "Agent Driven Development (ADD) — Coordinated AI agent teams that ship verified software. Spec-driven TDD, trust-but-verify orchestration, human-AI collaboration protocols, environment-aware deployment, and cross-project learning.",
  "author": {
    "name": "MountainUnicorn",
    "url": "https://github.com/MountainUnicorn"
  },
  "homepage": "https://getadd.dev",
  "repository": "https://github.com/MountainUnicorn/add",
  "license": "MIT",
  "keywords": [
    "agent-driven-development",
    "sdlc",
    "tdd",
    "methodology",
    "multi-agent",
    "orchestration",
    "spec-driven",
    "quality-gates",
    "maturity-lifecycle",
    "human-ai-collaboration"
  ]
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 25 lines scan A 366ce419dc4a

Subscribe to this mod's changes

add is a plugin published in the GitHub repository MountainUnicorn/add (11 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. It is 91% identical to add, differing in 2 lines, and is treated as a copy.