Support 100% Offline Mode for air-gapped environments with self-hosted LLMs

[martinsomm]

Why are you proposing this feature?

In environments with restricted or no internet access (e.g., air-gapped systems, secure corporate networks), developers cannot leverage the UI5 MCP server. Currently, the server relies on internet/CDN access, which prohibits its usability in offline scenarios.

Background:

• Many enterprises and government organizations enforce strict network isolation for security or compliance reasons.
• Local LLMs (e.g., for privacy, latency, or cost reasons) require offline access to UI5 resources to provide accurate, up-to-date responses.

How should a possible solution look like?

Introduce a configuration option to enable offline mode.
When enabled, the server should serve all requests from the local cache, without attempting to fetch from the internet/CDN.

Provide a command to manually update the local cache.
Support incremental updates to avoid re-downloading unchanged resources.
Allow specifying a custom cache directory.

Are there alternative approaches?

probably some open source UI5 MCP servers

Any further information you would like to share?

The solution may require:

• A script to pre-fetch and index UI5 documentation.
• A lightweight local server to serve cached resources.

Potential Challenges:

• Ensuring the cache stays up-to-date with UI5 releases.
• Handling large cache sizes (e.g., for full SDK documentation).

[flovogt]

Hi @martinsomm, thanks a lot for creating this enhancement request and sharing your feedback with us. It's a great idea and we will have a look at it.

[RandomByte]

Adding to this, we had a similar request recently where the requirement was that everything should ideally be loaded from the npm registry so that a (prefilled) offline npm proxy could be used.

[flovogt]

This enhancement request is SAP internally tracked in backlog item CPOUI5FOUNDATION-1243.