knktc's Notes

A lightweight introduction to tools.knktc.com, a small toolbox site I built with Codex vibe coding for everyday development and debugging tasks.

VS Code can automatically add a Co-authored-by line for GitHub Copilot to commit messages. Here is how to turn it off.

A lightweight Go tool for local HTTP request debugging, webhook testing, and quick inspection with both web and CLI views.

If you use Django with pymemcache and want cache failures to degrade gracefully, make sure ignore_exc is set to True.

Notes on getting numpy and pandas working inside a Python 3.7 virtual environment on Kylin V10 running on a Sunway SW64 CPU.

macOS Ventura's newer OpenSSH defaults can reject older RSA/SHA-1 server setups, causing git push to fail with Permission denied (publickey).

How to deal with the is-vs-== SyntaxWarning raised by python-memcached under Python 3.8, and a practical workaround.

How to return an empty JSON object for missing static files in Nginx and suppress the related not-found error log entries.

A practical walkthrough for issuing and renewing Let's Encrypt certificates on Ubuntu with Certbot, Cloudflare DNS, and Nginx.

A simple workaround to make the Poetry installer use a configured pip mirror instead of isolated mode.