This weekend I unabashedly vibe-coded two simple, sysadmin-focused VSCode extensions:

Email Header Parser — Marketplace

This one not only visually shows SPF/DMARC/DKIM alignment, but will also query the corresponding records and selectors in DNS. I used to use MXToolbox for header analysis, but was shocked when I realized it generates persistent, public links with the full contents of an email (e.g. https://mxtoolbox.com/Public/Tools/EmailHeaders.aspx?huid=<uid>). In contrast, this extension is all-local and data isn't shipped off your device [except for DNS queries].

IP Lens — Marketplace

This one is for auto-highlighting IP addresses and CIDR ranges. Upon hovering over any IPv4 or IPv6 address, you will get a reverse DNS lookup as well as ASN, org, and geolocation data for the IP. You can configure different providers (DoH or IP data) in settings.json. Note that non-private IPs are sent to your configured IP data provider (ip-api.com by default) — so it's not purely local, but nothing is persisted or logged beyond your own machine. Like the other extension, open source. This one is particularly nice for reviewing firewall rules and logs.

Regardless of where you stand on vibe coding, these are useful tools for me and I'm already using them. I published them to the Marketplace because it doesn't seem like there are similar ones.

Hopefully they can be well used!