# GPTsApp Plugins decision brief

## Plugin Development Toolkit (claude-code)

Format: gptsapp-plugin-decision-brief/1.0.0
Plugin ID: gpa:plugin:84264a183fa3e774297b212de06651e43c5bdee41a9475095d548bbc508b4b62
Canonical: https://plugins.gptsapp.io/plugins/claude-code/anthropics/plugin-dev
Source owner: anthropics
Declared author: Anthropic source repository
Repository: https://github.com/anthropics/claude-plugins-official
Package root: plugins/plugin-dev
Package format: claude-plugin
Documented targets: Claude Code (claude-code)
Documented targets are source declarations, not tested compatibility. Other interfaces remain unknown.
Task scope: All recorded tasks
Recorded tasks: Build a plugin (plugin-development)

Plan and build Claude Code package components, settings and distribution documentation.

### Version and observation scope
Workflow-note version: Unknown
Workflow-note revision: Unknown
Workflow-note observation: 2026-09-07
Manifest version: Unknown
Manifest revision: Unknown
Manifest observation: Unknown
Component observation scope: observed-2026-09-07
A manifest observation does not revalidate older component or prerequisite notes.

### Installation and delivery
Package role: Unknown
Delivery boundary: Unknown
Access: Local project and the target host setup; authoring a manifest alone does not make a plugin installed.
License declaration: Source LICENSE file present; no package contents redistributed
A license declaration is not a directory redistribution or safety certification.
Official installation: https://code.claude.com/docs/en/discover-plugins
Installation note: Find plugin-dev in the official marketplace. Its skills describe MCP integration; that does not mean all MCP servers are bundled.
Distribution: anthropic-official / plugin-dev; path plugins/plugin-dev; index revision 3deb821cb71ccfaaf2ffa9935e977df314ce5cd5; package revision 3deb821cb71ccfaaf2ffa9935e977df314ce5cd5
Distribution evidence: https://github.com/anthropics/claude-plugins-official/blob/3deb821cb71ccfaaf2ffa9935e977df314ce5cd5/.claude-plugin/marketplace.json

### Prerequisites by recorded task
No complete prerequisite set established. This is not proof of no dependencies.
The complete prerequisite inventory has not been established; unknown does not mean optional, free or unnecessary.

### Included components and observation limits
- Plugin authoring skills (Skills): Seven README-declared skills; retained prior package observation, not revalidated by marketplace refresh
  Recorded members: hook-development, mcp-integration, plugin-structure, plugin-settings, command-development, agent-development, skill-development
- Guided package authoring (Commands): README-declared command; retained prior package observation, not revalidated by marketplace refresh
  Recorded members: create-plugin
- Authoring and validation agents (Agents): Directory observed; complete member list not reconciled; retained prior package observation, not revalidated by marketplace refresh
  Exact member count: Unknown.
Included Skill, Agent and Command files are not a request to install duplicate copies. File/configuration presence is not host activation.

### Source issues
No separately recorded issue. This is not a safety review.

### Independent runtime states
Package installed: Not observed
External connection: Not observed
Access authorized: Not observed
Task completed: Not observed
This brief includes no personal prerequisite answers, credentials or runtime checks. No winner, compatibility, safety or authorization verdict.

### Sources
- https://github.com/anthropics/claude-plugins-official/tree/main/plugins/plugin-dev
- https://github.com/anthropics/claude-plugins-official/blob/3deb821cb71ccfaaf2ffa9935e977df314ce5cd5/.claude-plugin/marketplace.json
- https://github.com/anthropics/claude-plugins-official/tree/3deb821cb71ccfaaf2ffa9935e977df314ce5cd5/plugins/plugin-dev