Sync Schemas

Re-analyze the official anthropics/claude-plugins-official marketplace.json to keep our local schemas accurate.

Why This Exists

The canonical $schema URL (https://anthropic.com/claude-code/marketplace.schema.json) returns 404 — confirmed since October 2025 (GitHub Issue #9686). We maintain inferred schemas locally at:

• schemas/marketplace.schema.json — validates marketplace.json catalog files
• schemas/plugin.schema.json — validates .claude-plugin/plugin.json manifests

Steps

1. Fetch the Official Marketplace

Fetch the raw official marketplace.json:

https://raw.githubusercontent.com/anthropics/claude-plugins-official/main/.claude-plugin/marketplace.json

2. Extract All Plugin Entry Fields

Scan every plugin entry in the plugins array and collect:

• All top-level keys used across entries (name, description, source, category, version, author, homepage, strict, lspServers, tags, etc.)
• Source format variants: relative path string, { source: "url" }, { source: "git-subdir" }
• Category values: collect every unique category string
• lspServer shape: command, args, extensionToLanguage, startupTimeout
• Tag values: collect every unique tag string
• Author shape: name (required), email (optional)

3. Fetch Sample plugin.json Files

Fetch 3–5 official plugin.json files from different plugin types:

• One LSP plugin (e.g. plugins/typescript-lsp)
• One workflow plugin (e.g. plugins/commit-commands)
• One hook plugin (e.g. plugins/security-guidance)

Collect all top-level keys used across plugin.json manifests.

4. Diff Against Local Schemas

Compare findings against the current local schemas:

• schemas/marketplace.schema.json
• schemas/plugin.schema.json

Report any differences:

• New fields found in official that are missing from local schemas
• Category values that need to be added to the enum
• Source format changes
• Fields in local schemas that no longer appear in official

5. Update Local Schemas

Apply any necessary changes to keep schemas in sync. For each update:

1. Add new fields/values discovered
2. Remove fields/values no longer used
3. Update descriptions if semantics changed
4. Preserve the $id, title, and description metadata

6. Validate Our Own Files

After updating schemas, validate:

• schemas/marketplace.schema.json — valid JSON Schema
• schemas/plugin.schema.json — valid JSON Schema
• .claude-plugin/plugin.json — conforms to plugin.schema.json

Report results as a summary table:

File	Status	Notes
marketplace.schema.json	✅ Updated	Added 2 new categories
plugin.schema.json	✅ No changes	—
plugin.json	✅ Valid	—

7. Report

Print a changelog of what was updated (or confirm schemas are already current).