Luis Colunga's Blog
Latest posts
tls_checker: Quick TLS Checks for a List of Hosts
tls_checker is a command-line tool for running concurrent TLS checks against a list of hosts. It resolves DNS, completes the TLS handshake, reports the negotiated version, checks ALPN, probes HTTP/2 when it makes sense, and can also attach ASN information to the result. Origin …
Trying Pencil.dev on My Hugo Blog
I saw Pencil.dev floating around on Twitter and tried it on this site. At a glance, it’s a design mockup tool. The part I cared about is that it plugs into MCP both ways: it can drive Claude Code and Codex, and you can also talk to the MCP servers outside the Pencil UI. Setup On …
I Switched to WezTerm
I switched to WezTerm today. I should have done it earlier. Setup was simple: brew install --cask wezterm, it picked up ZSH by default, and I swapped the Terminal dock icon for WezTerm. Then I did the only tweaking that matters to me: legibility. This is what I’m running right …
Test Driving Jules: Google's Coding Agent
I’ve seen Jules mentioned a few times by Google engineers on X, but I didn’t pay much attention until I noticed the logo up on agents.md website. That overlap made it worth testing: less out of curiosity, more to see whether it actually changes how work gets done compared to just …
ip_exit_enum: Discovering Public Exit IP Addresses
ip_exit_enum is a command-line tool for discovering and enumerating public exit IP addresses by querying multiple independent STUN and HTTP services. It’s designed to reveal non-deterministic outbound behavior (load-balanced NAT, ISP routing policies, etc.) that single-request …
Clean Up Your X For You Feed
At some point the For You tab on X (formerly Twitter) decided I needed nonstop updates about topics I never cared about. The culprit lives under Settings → Privacy and safety → Interests, where the platform keeps silently re-checking categories based on past engagement. Manually …