Plugins

Plugins are themed bundles of agents, instructions, skills, and hooks. They are the distribution format for FrootAI primitives — installable packages that ship via the FrootAI Marketplace.

Plugin Structure

Every plugin lives under plugins/ with this layout:

plugins/document-intelligence/
├── plugin.json          # Required — plugin manifest
├── README.md            # Required — user-facing documentation
├── CHANGELOG.md         # Recommended — version history
└── assets/              # Optional — icons, screenshots
    └── icon.png

The folder name must be lowercase-hyphen and match the name field in plugin.json.

plugin.json Schema

plugins/document-intelligence/plugin.json

{
  "name": "document-intelligence",
  "description": "End-to-end document processing pipeline with Azure AI Document Intelligence, OCR extraction, and PII detection.",
  "version": "1.0.0",
  "author": {
    "name": "FrootAI Contributors",
    "email": "hello@frootai.dev",
    "url": "https://frootai.dev"
  },
  "repository": "https://github.com/frootai/frootai",
  "license": "MIT",
  "keywords": ["document-intelligence", "ocr", "extraction", "pii-detection"],
  "agents": [
    "../../agents/fai-document-processor.agent.md",
    "../../agents/fai-extraction-reviewer.agent.md"
  ],
  "instructions": [
    "../../instructions/python-waf.instructions.md"
  ],
  "skills": [
    "../../skills/fai-document-indexer/"
  ],
  "hooks": [
    "../../hooks/fai-pii-redactor/"
  ],
  "plays": ["06", "15"]
}

Required Fields

Field	Type	Rules
name	string	^[a-z0-9]([a-z0-9-]*[a-z0-9])?$, 3–64 chars, must match folder
description	string	10–500 characters
version	string	Semver: MAJOR.MINOR.PATCH (e.g., 1.0.0)
author.name	string	Required
license	string	SPDX identifier (MIT, Apache-2.0)

Optional Fields

Field	Type	Description
author.email	string	Contact email
author.url	string	Author website
repository	string	GitHub URL
homepage	string	Plugin docs URL
keywords	string[]	Lowercase-hyphen tags, max 20
agents	string[]	Relative paths to .agent.md files
instructions	string[]	Relative paths to .instructions.md files
skills	string[]	Relative paths to skill folders (trailing /)
hooks	string[]	Relative paths to hook folders (trailing /)
plays	string[]	Compatible solution play IDs

:::info Plugins as DevKit Distribution Plugins are how DevKit primitives are distributed. Design your skill and agent bundles so they can be extracted as standalone plugins for the marketplace. :::

Versioning Strategy

Follow semantic versioning for all releases:

Change Type	Version Bump	Example
Bug fix in agent prompt	PATCH	1.0.0 → 1.0.1
Add new instruction	MINOR	1.0.1 → 1.1.0
Remove an agent or rename paths	MAJOR	1.1.0 → 2.0.0
Pre-release testing	PRERELEASE	2.0.0-beta.1

Creating a Plugin

1. Create the folder: mkdir -p plugins/my-plugin
2. Create plugin.json with required fields
3. Create README.md documenting what's included
4. Reference existing primitives via relative paths
5. Validate: npm run validate:primitives
6. Regenerate marketplace: node scripts/generate-marketplace.js

Registering in the Marketplace

After validation, add your plugin to the marketplace:

# Validate schema compliance
npm run validate:primitives

# Regenerate marketplace index
node scripts/generate-marketplace.js

# Verify your plugin appears
node -e "
  const m = require('./marketplace.json');
  const p = m.plugins.find(p => p.name === 'my-plugin');
  console.log(p ? '✅ Found: ' + p.name : '❌ Not found');
"

Referencing in a Play

fai-manifest.json

{
  "primitives": {
    "plugins": ["../../plugins/document-intelligence/"]
  }
}

Validation

npm run validate:primitives

Common errors:

Error	Fix
name must match pattern	Use only lowercase letters, numbers, hyphens
description too short	Write at least 10 characters
version must match pattern	Use X.Y.Z format
author.name is required	Add "author": { "name": "..." }
agents[0] path not found	Ensure referenced file exists at the relative path

See Also

• Package a Plugin Guide — step-by-step tutorial
• Skills — skills bundled in plugins
• Hooks — hooks bundled in plugins