interplug

Plugin development toolkit for Claude Code.

What this does

interplug covers the full plugin lifecycle: scaffolding a new plugin, validating its structure, and troubleshooting when things don't work. Three focused skills instead of one monolithic guide.

The create skill walks through planning, directory creation, component wiring (skills, hooks, agents, commands, MCP servers), and release preparation. The validate skill checks everything a plugin needs to load correctly: plugin.json schema, path references, hook permissions, skill structure. The troubleshoot skill is a diagnostic guide for the three most common failure modes: plugin not loading, skill not triggering, hooks not firing.

Installation

First, add the interagency marketplace (one-time setup):

/plugin marketplace add mistakeknot/interagency-marketplace

Then install the plugin:

/plugin install interplug

Usage

Create a new plugin:

/interplug:create

Validate plugin structure:

/interplug:validate

Debug a broken plugin:

/interplug:troubleshoot

Or ask naturally:

"create a plugin for code formatting"
"why isn't my plugin loading?"
"check if my plugin.json is correct"

Architecture

skills/
  create/
    SKILL.md                Full lifecycle creation workflow
    references/
      plugin-structure.md   Plugin manifest and directory conventions
      common-patterns.md    Hooks, MCP servers, skill patterns
      polyglot-hooks.md     Writing hooks in Python, Node, Go, etc.
      troubleshooting.md    Common failure modes and fixes
  validate/
    SKILL.md                Structural validation checks
  troubleshoot/
    SKILL.md                Diagnostic guide for common failures

Companion plugins

• interskill — skill authoring toolkit (for creating skills within plugins)
• interdev — Claude Code reference docs and MCP CLI interaction

Ecosystem

interplug was extracted from interdev's developing-claude-code-plugins skill. The original monolithic skill covered plugins, skills, and Claude Code reference — now each concern has its own plugin.