This change primarily focused on a revised +ssh-cache user interface, but it also reworks a bunch of the internals. The primary CLI improvement is support for positional arguments and a consistent list output format that includes both the ISO-formatted timestamp and relative age. ghostty +ssh-cache # List all cached destinations ghostty +ssh-cache user@example.com # Show that destination ghostty +ssh-cache example.com # Show all users on that host ghostty +ssh-cache --add=user@example.com # Manually add a destination ghostty +ssh-cache --remove=user@example.com # Remove a destination ghostty +ssh-cache --prune=30d # Remove entries older than 30 days ghostty +ssh-cache --clear # Clear entire cache Notable, we now support a --prune operation that replaces the previous --expire-days flag that was never actually hooked up to anything (!!). --prune also supports a wider range of Duration-based values. We're also much more consistent with error codes: 0=success, 1=failure, 2=usage. While working on those changes, I also reworked the cache internals, particularly the code around timestamp handling and errors. For example, I dropped the explicit error sets because they were growing unwieldy, and in practice we only matched on a subset of those errors. Lastly, overall test coverage should be much improved, especially around the time- and allocation-related operations. --- *AI Disclosure:* I made a lot of iterative, AI-assisted (Claude Opus 4.7) correctness passes over this work. It was particularly helpful in tracing through the various failure modes, and it wrote those unit tests in the process.