Add UI-based Agent Skills Installation for OpenCode Desktop

[TimLai666]

Description

OpenCode Desktop currently lacks a user-friendly interface for installing and managing Agent Skills (like n8n-skills, etc.). This feature would greatly improve the user experience by allowing users to:

1. Browse available Agent Skills through a UI
2. Install/uninstall skills with one click
3. View skill descriptions, versions, and compatibility
4. Manage skill dependencies and configurations
5. Enable/disable skills without command-line knowledge

The current workflow requires manual installation via CLI or editing configuration files, which is not accessible to all users. A built-in UI would make OpenCode Desktop more approachable and increase adoption.

This feature should integrate with the existing skill system and provide:

• A skills marketplace or catalog view
• One-click installation from the UI
• Progress indicators and success/failure notifications
• Skill management dashboard
• Automatic dependency resolution

I believe this enhancement would significantly improve the desktop experience and align with OpenCode's goal of being user-friendly.

Verification

I have verified that this issue exists by:

• Attempting to install n8n-skills manually
• Checking the current lack of UI for skill management
• Confirming the CLI-only workflow is not user-friendly for non-technical users

How to reproduce

1. Open OpenCode Desktop
2. Try to install a new Agent Skill
3. Notice there is no UI option available
4. Attempt manual installation via CLI or config files
5. Experience the current friction points

[github-actions]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

• The title must start with [FEATURE]: for feature requests (e.g. [FEATURE]: Add UI-based Agent Skills Installation for OpenCode Desktop)
• The issue template requires checking the verification checkbox confirming the feature hasn't been suggested before — this is already a duplicate (see below)
• The description reads as AI-generated content, which is not acceptable

Please edit this issue to address the above within 2 hours, or it will be automatically closed.

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This issue appears to be a duplicate of existing issues. Please check:

• [FEATURE]: Add UI-based Agent Skills Installation for OpenCode Desktop #16010: Identical title and description by the same author — this is an exact duplicate of your own issue
• [FEATURE]: Skill Registry + Installer for Awesome-Claude-Skills (Make OpenCode the One Tool) #8386: [FEATURE]: Skill Registry + Installer — covers the same skill management/installation UI concept

If you believe this was flagged incorrectly, please let a maintainer know.