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in reply to Re^4: Using a git filter to Cache HTML Resources Locally
in thread Using a git filter to Cache HTML Resources Locally

This remarks reminds me of a caching proxy I had in use when internet connection time was metered in seconds. It might be possible to configure it to the same effect.

For shielding your "work in progress" from local resources (CSS/JS/...) that are WIP themselves, however, the git filter can do what the proxy definitely can't.