Plugin Marketplace

A central registry for discovering, publishing, and managing Knowledge Tree plugins with enterprise-grade security controls.

Overview

The Plugin Marketplace is a central registry for Knowledge Tree plugins. It enables plugin authors to publish their plugins with versioning, digital signing, and documentation. Operators browse the marketplace from the Knowledge Tree UI or API, install plugins with a single click, and manage updates across their fleet of instances.

Enterprise security

All marketplace plugins are cryptographically signed and run in a sandboxed environment. The marketplace enforces a security review process for verified publisher plugins.

Plugin registry

The registry stores plugin metadata, binaries, and signatures. Every plugin has a unique namespace (e.g., knowledge-tree/aws,acme-corp/network-scanner) and follows semantic versioning.

Feature	Description
Namespacing	`publisher/plugin-name` with verified publisher accounts
Versioning	Semantic versioning with release notes and changelogs
Dependencies	Plugins can declare dependencies on other plugins or SDK versions
Tags	Categorization by provider, resource type, and capability
Ratings	User ratings and reviews for quality signals

Signing and verification

Every plugin published to the marketplace is cryptographically signed. The verification chain works as follows:

Publisher identity -- publisher's GPG or Sigstore key is registered with the marketplace
Plugin signing -- plugin binary is signed at publish time with the publisher's private key
Signature storage -- signature is stored alongside the plugin in the registry
Installation verification -- Knowledge Tree verifies the signature before loading the plugin
Tamper detection -- any modification after signing invalidates the plugin

# Sign and publish a plugin
kt-marketplace publish \
  --plugin ./bin/my-plugin \
  --namespace acme-corp \
  --name network-scanner \
  --version 1.2.0 \
  --key ~/.kt/publisher.gpg

Marketplace UI

The marketplace is accessible from the Knowledge Tree administration panel. The UI provides:

Browse and search -- filter by provider, category, rating, and compatibility
Plugin details -- description, documentation, version history, and user reviews
One-click install -- install plugins directly to your Knowledge Tree instance
Update management -- see available updates and apply them with a single click
Private registry -- host internal plugins behind authentication

Sandboxing

All marketplace plugins (and any third-party plugins) run in an isolated sandbox to prevent security incidents:

Sandbox mechanism	Protection
gRPC isolation	Plugin runs as a separate process communicating via gRPC
Resource limits	CPU, memory, and file descriptor limits per plugin process
Network policy	Plugin network access is restricted to declared API endpoints
Filesystem isolation	Plugin sees only its own temporary directory
Timeout enforcement	Maximum execution time per discovery run

Analytics

Plugin usage analytics help operators understand which plugins are being used and how they perform:

Install counts -- how many instances have each plugin installed
Execution metrics -- average discovery time, success rate, resource yield
Error tracking -- crash reports and error rates per plugin version
Usage trends -- adoption over time, popular plugin combinations

Private marketplace

Enterprise deployments can run a private marketplace instance for internal plugins, ensuring proprietary discovery logic never leaves the organization.