[Windows] claude-plugins-official marketplace not pre-registered, requires manual extraKnownMarketplaces unlike macOS

Description

On macOS, the claude-plugins-official marketplace is pre-registered in Claude Code, so adding enabledPlugins to settings.json works out of the box:

{
  "enabledPlugins": { "pyright-lsp@claude-plugins-official": true }
}

On Windows, the same configuration fails silently — and running /plugin install pyright-lsp@claude-plugins-official returns:

Plugin "pyright-lsp" not found in any marketplace

The marketplace claude-plugins-official is simply not registered in the Windows installation of Claude Code.

Steps to Reproduce

1. Fresh Claude Code install on Windows 11
2. Add to ~/.claude/settings.json:

``json
{ "enabledPlugins": { "pyright-lsp@claude-plugins-official": true } }
``

1. Restart Claude Code
2. Run /plugin install pyright-lsp@claude-plugins-official
3. Result: Plugin "pyright-lsp" not found in any marketplace

Expected Behavior

Same behavior as macOS — the official Anthropic marketplace (claude-plugins-official) should be pre-registered on all platforms so that enabledPlugins and /plugin install work without extra config.

Workaround (Windows only)

Manually add extraKnownMarketplaces to ~/.claude/settings.json:

{
  "extraKnownMarketplaces": {
    "claude-plugins-official": {
      "source": { "source": "github", "repo": "anthropics/claude-plugins-official" }
    }
  },
  "enabledPlugins": { "pyright-lsp@claude-plugins-official": true }
}

After adding this, /plugin install pyright-lsp@claude-plugins-official succeeds and /reload-plugins confirms:

Reloaded: 2 plugin(s) · 1 LSP server(s) provided by plugins require restart to activate.

Environment

• OS: Windows 11 Pro 10.0.26200
• Claude Code: latest (autoUpdatesChannel: latest)
• pyright: 1.1.408 (installed via npm install -g pyright)

Related

• #16219 (closed, different issue: lspServers config propagation)