Missing "Personal" tab in Claude Desktop's plugin marketplace, preventing custom marketplace integration

[Bug] "Personal" tab not visible in Claude Desktop Cowork plugin marketplace
Environment:

Claude Desktop: v1.1.5749 (ecf3d9)
Build date: 2026-03-08
Feature: Cowork → [Plugins]
OS: windows

Steps to Reproduce:

Launch Claude Desktop
Navigate to the Cowork tab
Click "Customize" (カスタマイズ)
Click "Browse Plugins" (プラグインを参照)

Expected Result:
A "Personal" (個人用) tab should be visible alongside "Anthropic & Partners" tab, allowing users to add custom marketplaces from GitHub.
Actual Result:
Only the "Anthropic & Partners" tab is displayed. The "Personal" (個人用) tab is not visible, making it impossible to add custom marketplaces like phuryn/pm-skills.
Screenshots:
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Additional Context:
According to the documentation for phuryn/pm-skills, users should be able to add the marketplace by:

Going to "Personal" (個人用) tab
Clicking the + button
Selecting "Add marketplace from GitHub"
Entering the repository URL

However, the "Personal" tab does not appear in my installation, preventing me from proceeding with these steps.
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Update: Workaround confirmed by a helpful friend
I received a response from a helpful friend regarding this issue. According to them, the marketplace auto-install feature is not currently supported in Claude Desktop app.

Instead, they provided the following workarounds:

Workaround A: Using Projects (Pro plan or higher)

Download the repository from GitHub: Click "Code" → "Download ZIP" on the phuryn/pm-skills page
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