Reproducibility answers one question:

Can RetroBridge be rebuilt from scratch?

Recovery answers another:

Can the exact working appliance be restored quickly if the microSD card fails?

I tested that separately.

I created a full image of the known-good RetroBridge V1.1 microSD card.

The raw image was:

• created from the entire physical card
• SHA-256 hashed
• compressed with gzip
• gzip integrity-tested
• SHA-256 hashed again after compression

I then restored that image onto a second microSD card and booted the Raspberry Pi from the restored copy.

The recovered card successfully reproduced the working RetroBridge appliance.

I tested:

• the RetroBridge frontend
• Apple-1
• TRS-80 Model I
• Apple II
• IBM PC
• Commodore 64
• appliance startup behavior

The recovery test passed.

The private full-card image is not published in the public repository.

That is intentional.

A complete operating-system image can contain machine-specific state such as:

• local user information
• SSH state
• network configuration
• logs
• host-specific settings
• other material that does not belong in a public project archive

Instead, RetroBridge publishes:

1. a documented clean-build process, and
2. instructions for builders to create and verify their own recovery image.

So the project now has both:

reproducibility — rebuild it from public instructions recovery — restore your own exact appliance image

That gives the project a much more practical long-term maintenance path.