[Retroactive] The 2025 Advent Calendar That Never Happened

On December 22, it suddenly hit me.

“Wait, could this have been an Advent Calendar?”

I had been writing technical articles every day since December 1. Some days I even wrote multiple articles.

But I never registered it. Too late now.

So here is the retroactive retrospective.

Calendar

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December 1

• PowerShell profile loading error (script execution disabled)
• Summary of how I got the NDLOCR Docker image build working
• Forcing NDLOCR’s column-layout recognition to work with histogram analysis
• Revived an ancient MacBook Pro (A1502) with Zorin OS 18

December 2

• Simple OGP handling for SPA / dynamically generated articles

December 3

• Implementing existence checks and fallback handling for external image URLs in a-blog cms

December 4

• How to deal with mail not reaching same-domain addresses in WordPress

December 5

• The nul file Vite builds generate on their own, and the Git error they cause

December 6

• The story of dates gone wrong in the server, MySQL, PHP, and JavaScript stack
• The path.join() bug in kuromoji.js and the fix for loading CDN dictionaries
• @paddlejs-models/ocr does not run in the browser (as of 2025)

December 7

• Lightweight YouTube embeds in Astro: implementing lazy loading with a rehype plugin
• AI keeps forgetting that Astro scoped CSS does not apply to JavaScript-generated elements
• OCR: a summary of the limits and lessons from 2025 web implementations

December 8

🍺 Had drinks, there was an earthquake, and I kind of forgot

December 9

• Trying LoRA creation in spare time while introducing LLM / RAG at work, 2025 (Part 1)
• Building an internal help desk with Mac mini M4 Pro + Dify, 2025 (Part 1)

December 10

• Notes on dealing with the React2Shell vulnerability in Next.js / React
• Next.js broke, so I switched to pnpm (React2Shell vulnerability)
• Recreating shared hosting development environments in Docker in 2025 - Sakura and Lolipop
• CVE-2025-54100: Remote code execution in PowerShell’s Invoke-WebRequest

December 11

• Setting up a LoRA training environment on an RTX 3060 Laptop (6GB VRAM)

December 12

• SeaArt LoRA training guide

December 13

• A token management guide for people whose CLAUDE.md is getting bloated
• Practical SeaArt LoRA creation: making it work the way you want

December 14

• Why you still cannot edit high-resolution images in Antigravity even with Gemini Pro
• How I cut this site’s CLAUDE.md down to less than half its size

December 15

• How to deal with Gemini Gems showing the “project has been deleted” error
• Getting briefly stuck while trying to share a Gem in Gemini

December 16

• The mojibake problem when sending multibyte characters from PowerShell to MySQL in Docker

December 17

• Implementing drafts in Astro
• Node.js security release delayed again to January 7 - three High-severity vulnerabilities to be fixed

December 18

• “Just switch it in .env” explained: an introduction to PHP DI containers
• React2Shell was so annoying that I migrated from Next.js to Astro

December 19

• I have no idea how Claude Code permissions work

December 20

• Gemini was genuinely bad at side ponytails, so I fixed it

December 21

• Testing Claude Code v2.0.74’s LSP feature with PHP turned out to hit a known bug
• Nano Banana Pro finally became available in Antigravity

December 22

• Steam DLC depot configuration troubleshooting log
• Steam DLC, soundtrack, and bundle addition guide
• Steam Early Access -> full release transition guide
• Steam Early Access publication guide

December 23

• Adding full-text search to an Astro static site with Pagefind
• The Mintlify vulnerability is not React2Shell: framework responsibility vs. implementation responsibility
• Gemini Gems’ image reference suddenly broke, so I fixed it by asking another AI to pray

December 24

• How do you manage Claude Code sessions?
• Tried image generation with Google Flow - comparison with Gem and prompt tips
• This article

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Summary

Come on, the 8th…

From December 1 to 24, I published 46 articles. If you exclude the 8th, I really was posting every day.

Next year I should remember to register it as an Advent Calendar.

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…but then I checked the Git log and found that I had also committed updates to the lab pages on the 8th (building image conversion tools and adding the TGA viewer). They were not articles, but they were still output.

Maybe I really did qualify for the Advent Calendar after all?