Schema validation errors in marketplace.json: 15 plugins have invalid source format

[nazakahar]

Description

When attempting to add the official marketplace using /plugin marketplace add anthropics/claude-plugins-official, Claude Code fails with schema validation errors for 15 plugins.

Error Message

Error: Invalid schema: plugins.2.source: Invalid input, plugins.5.source: Invalid input, 
plugins.12.source: Invalid input, plugins.31.source: Invalid input, plugins.35.source: Invalid input, 
plugins.52.source: Invalid input, plugins.61.source: Invalid input, plugins.67.source: Invalid input, 
plugins.70.source: Invalid input, plugins.92.source: Invalid input, plugins.102.source: Invalid input, 
plugins.112.source: Invalid input, plugins.120.source: Invalid input, plugins.121.source: Invalid input, 
plugins.126.source: Invalid input

Environment

• Claude Code version: 2.0.50
• OS: Arch Linux
• Command: /plugin marketplace add anthropics/claude-plugins-official

Root Cause

The marketplace.json file contains inconsistent source field formats across plugins. Claude Code's schema validation expects the source field to be an object, but some plugins use string paths instead.

Affected Plugins (0-indexed)

Index	Plugin Name	Current Format
2	ai-firstify	git-subdir object
5	amazon-location-service	git-subdir object
12	astronomer-data-agents	url object
31	claude-code-setup	"./plugins/claude-code-setup" (string)
35	coderabbit	url object
52	expo	git-subdir object
61	frontend-design	"./plugins/frontend-design" (string)
67	greptile	"./external_plugins/greptile" (string)
70	helius	git-subdir object
92	legalzoom	git-subdir object
102	neon	git-subdir object
112	postman	url object
120	railway	git-subdir object
121	ralph-loop	"./plugins/ralph-loop" (string)
126	semgrep	git-subdir object

Expected Schema

Valid source field format (object):

"source": {
  "source": "url",
  "url": "https://github.com/...",
  "sha": "..."
}

Invalid Schema

Current problematic format (string):

"source": "./plugins/plugin-name"

Impact

• Users cannot install plugins from the official marketplace
• The /plugin marketplace add command fails completely
• All 33+ plugins become unavailable even though only 15 have schema issues

Steps to Reproduce

1. Install Claude Code 2.0.50
2. Run /plugin marketplace add anthropics/claude-plugins-official
3. Observe schema validation error

Suggested Fix

Update all plugin entries in .claude-plugin/marketplace.json to use consistent object-based source format. For local path plugins, convert:

"source": "./plugins/claude-code-setup"

To:

"source": {
  "source": "local",
  "path": "./plugins/claude-code-setup"
}

Or define and document the proper schema for local plugins.

Additional Context

This issue was discovered while attempting to use the official plugin marketplace feature. The initial bootstrap clone also failed with a different error (anthropic-claude-code-plugins repository not found, should be anthropics/claude-plugins-official), suggesting the marketplace integration may need additional testing and validation.