天空вℓσи∂ @skyblond@qoto.org

Apparently I'm too old to stay up late till 4am.

Oh god I'm sleepy

Lunar eclipse!

Still have about 250 USD credit left in about a month. I have already hooked gemini api with SillyTavern and OpenWebUI, and tonight with aider.

Any other suggestions for productivity tools and entertainment with gemini? Anything would be appreciated, I just want to spend all those free credits before they expire. Can't left those free juice for google XD

I suddenly remembered that I signed up for GCP to use Gemini, and now the free trial credit is about to expire, and I haven't used it much. So tonight I tried Aider to document my recent side project. While it requires constant guidance, it's overall much easier than writing the documentation myself. I just feed it the required files, and it automatically corrects the hallucinations. And the tone is much better than my harsh wording, LOL

Preview: https://github.com/hurui200320/meshtastic-forwarder/blob/c9451ec6fbf48da3c1c31423019837e0eeaed623/README.md

Recently reading Google's guideline on how to write prompt for LLM since recently I'm trying to connect geimini to meshtastic channels, and due to limitations, I want specific behavior which is different from what you usually get from a LLM, and the prompt I wrote is not working well.

I also found the prompt leaks from different LLM services. From what I read, I think GPT 5 might learn well on how to fudge humans to void answering questions. Since the first paragraph of their system prompt is to tell the model does not avoid answering questions. LOL

----
Ref: https://www.kaggle.com/whitepaper-prompt-engineering
Ref: https://github.com/asgeirtj/system_prompts_leaks/blob/main/OpenAI/gpt-5-thinking.md

People say nikkor 180-600mm is not the sharpest, but this one has already impressed me enough. Can't imagine how sharp the nikkor 800mm f6.3 S line lens will be. (Well, that's a really expensive lens, probably not gonna buy it in my entire life, unless I have the opportunity to earn like half a million per month)

Well, chickens are also birds, so that's bird-watching for today.

Oh god I love the protocol design of Meshtastic. I can control the device using Java via serial port (on Linux only).

Now I can receive and send messages.

Oh god I love the protocol design of Meshtastic. I can control the device using Java via serial port (on Linux only).

Now I can receive and send messages.

Broadcom is shit. Period.

Today I spend some time in the video recording using my Nikon Z50II, I asked Google's Gemini 2.5 Pro, and the conclusion feels pretty solid.

The conclusion is that:

1. Recording in 4k30p will use the full CMOS data and super sampled to 4K
2. Recording in 4k60p results into a 1.5x crop in addition to the APS-C sensor, which results in a 1:1 mapping from the CMOS pixel to the video frame pixel. Due to the bayer filter, each pixel on the CMOS will only record one channel of RGB colors, and the video will look soft compared to 4k30p.
3. Recording in FHD (1080) will also use super sampling, even with the Hi-Res Zoom enabled. But the overall benefits are not worth downsizing from 4k to 1080.

In my case, I think details are pretty important. Today I took a video from about 150 to 200 meters away for a little grebe (Tachybaptus ruficollis). I tried both 4k30p and 4k60p, none of them can capture the details. I can distinguish it because it's a blob of black with some red at its neck. But in 4k60p, without super sampling, everything, including the little egret (Egretta garzetta) at 115 meters away, is soft and lacking details. In contrast, 4k30p can give a better viewing experience since everything is sharper (but smaller).

I'd prefer 4k30p, even with birds. If 30 fps is not enough, then I probably need a Z8.

Me at 2am last night: Frieren is so good, it's worth staying up late to finish it

Today, me woke up at 1pm, exhausted: No, it's not.

I also made a comparison with Sony PCM-A10, which is my original plan for recording audio: https://www.youtube.com/watch?v=MBPM3fwlfdY

The PCM A10 doesn't have too much directivity, and the audio sounds flat. I would say MKE600 worth the money

Bought a sennheiser MKE600 microphone, for its price, I'm planning:

1. record video with it so I can capture the birds singing.
2. use it on my work machine so I can join meetings on my nuc.

For the second purpose, I need a P48 power supply. I searched aliexpress, but all of them require AC18V input, while P48 output DC48V. Not sure why.

> I though I'm using virtiofs, but it's actually 9p.

Don't ask how long it takes me to figure that out. I spent half of my day to search why file mmap failed on virtiofs, all result suggest it shouldn't be.

Switched from Tixati to qBittorrent for BTN support since my nas has been leeched by a list of datacenter IPs.

Then I noticed that qbittorrent failed to write any file. After some digging, it turns out the C lib failed to do `file_mmap`. I'm using unraid and it offers both 9p and virtiofs to mount shares to vm. I though I'm using virtiofs, but it's actually 9p. The 9p mode failed to support mmap and the read performance is slow. With my ZFS setup, it can only read 60MB/s.

After switching to virtiofs, the read performance is back to normal, reaching about 700MB/s and mmap is working out of box.

I think unraid should really make the virtiofs as the first option, instead of 9p.