Deep Dive into StackStacks - An AI-Powered Anime Partner That Can Send Comments

Would you like your favorite anime characters to be with you all the time?

I studied "The other night"Claude In the video "Code from Beginner to Expert", a line of pink text with a small emoji suddenly floated in the upper right corner of the screen: "It seems that Sister K has found her way to salvation~" as it slowly floated from right to left.

This is a bullet comment, similar to those on Bilibili, but it can float on any app on your phone or computer.

The comments section can be customized with your favorite anime or character, allowing your favorite personality to always be with you..

It's available for Windows, Android, and Mac; iOS will be coming soon.

K-sister has tested so many products, and StackStack is truly different. I dug into their team, and honestly, the more I dug, the more interesting they became.

Founder Lu Hongyuan, a post-95s entrepreneur, is among the precocious generation academically.

He completed university-level mathematics through self-study in high school, earned his undergraduate degree in Computer Science from Imperial College London, and pursued his doctorate at the Chinese University of Hong Kong. He also received pre-training training at Microsoft.AIModel. Exploring symbolic space began in 2023.intelligentAnd the world model, this technical approach was later validated by Fei-Fei Li. It was pioneered in 2023.AIThe research track on the detection and evaluation of decontamination symbols was followed by Professor Li Ge's team at Peking University. In 2023, they pioneered multiple...intelligentbodyThe company achieved interactive evolution and obtained related invention patents. This means that it caught the wave of many subsequent trends and mainstream directions at a very early stage.

In terms of academic achievements, Lu Hongyuan met the doctoral graduation requirements within six months of enrolling in the program. During this period, he completed a paper that subsequently won the ACL Best Paper Award, marking the first time in history that a Chinese institution had independently won this award, and also the first time that a paper had no corporate backing. The author team that stood on the podium consisted of only two people: Lu Hongyuan and his doctoral supervisor, Professor Lin Wei. Lu Hongyuan, as the first author, had only received six months of research training during this time. Furthermore, Lu Hongyuan is one of the few doctoral students to serve as an area chair at a top ACL conference while still pursuing his doctoral studies.

Abandoning the traditional academic path, Lu Hongyuan has amassed a wealth of papers, invention patents, and awards. His firm decision to choose entrepreneurship over a traditional academic position stems from his dream of creating a company that bridges industry and academia, similar to Google or Facebook.

The founding team of StackStack developed a framework called TFL (Textual Frequency Law) to address how to speak more authentically. This year, it was accepted by the ACL 2026 main conference, and the team's paper "Adam's Law: Textual Frequency Law on Large Language Models" has become very popular on the international internet.

It also topped the Huggingface chart.

Clearly, the real strength of StackStack lies in its model technology.

The recent "Ma Jiaqi" incident introduced a new term to the public: low-frequency token degradation. Simply put, it refers to words that appear too infrequently.Large ModelLater in the training, they stopped speaking properly.

Back in 2025, they presented SLoW at the EMNLP main conference, specifically studying how low-frequency words influence...Large Model,andopen sourceThey developed related algorithms. By 2026, they had further advanced the problem from "words" to "sentence expression" using Adam's Law/TFL.

And here's the important part: Anthropic will be released in April 2026. Claude Opus 4.7 also made changes to the tokenizer, which is generally believed in the industry to address the degradation problem caused by low-frequency tokens.

In other words, Facebook's mindset first clarifies the problem and explains the method.open sourceCome out. Anthropic later in Claude This top-tier business model validates this path using a product-level approach..

K-sister also learned that the founder officially announced on the Equator Quadrant that a new round of financing is underway. At the same time, they announced the introduction of Lianchuang, a listed company with a market capitalization of hundreds of billions, as a commercialization partner, and plans to bring in a renowned professor with thousands of published papers as chief scientist.

This young Chinese team is doing well.

The team is indeed impressive, but the product has to be strong too. Let's get straight to the review. I've been using the StackStack device for a week, and I'll share some of the scenarios I use most often with you.

TV series watching assistant

I've recently been watching "The Unpredictable," a suspense drama starring Liu Ye. The show itself is already quite addictive, and I'm curious to see if our production company can keep up with this mind-bending pace.

In the first episode, when Liu Ye's character first appeared, standing there with a weathered look on his face, a comment popped up on the screen: "The actor's eyes are so expressive; just looking at his face, you can feel the story is about to explode." Okay, that's something.

In the second episode, when Lao Zhu visited Xu Ming in the hospital, the comments section immediately said, "Xu Ming's eyes definitely hold a crucial clue!" Wow, they can even read eyes now.

During tense confrontation scenes where you're almost afraid to breathe, the number of comments suddenly decreased, with only the occasional "So tense, so tense." This rhythm was just right; people knew when to shut up, instead of mindlessly spamming the screen.

The most brilliant scene is when Guang Ge goes to the disco to ask for money. The owner refuses to pay and glares at him menacingly. Guang Ge remains silent for a long time. A comment on the screen reads: "He didn't say anything, but he acted it all out."

I was stunned for a moment when I saw that comment.AIHow could someone appreciate the subtle nuances in a performance?

For a suspense drama, a genre that demands a high level of comprehension, I was surprisingly able to handle most of it. I knew to stay calm during tense moments, and my reactions to plot twists were even stronger than mine. A must-watch for binge-watchers! 9/10

The ultimate tool for watching anime and manga!

This needs to be discussed separately.

I went straight for the challenge, testing myself with *Neon Genesis Evangelion*. Films like *Evangelion* have high information density, a lot of stream of consciousness, and intense emotional fluctuations; if you can handle it, you're pretty impressive. And I actually did!

When I saw the scene where Unit-01 went berserk for the first time, a comment popped up on the screen: "EVA Unit-01's berserk mode is about to happen, run!" I couldn't hold back anymore.

When Asuka was surrounded by the mass-produced machines, the comments section suddenly went silent. Several seconds later, a message appeared: "...Stop fighting."

The pacing was just right. Instead of forcing funny comments into the most heart-wrenching parts, it followed the emotional flow of the story.

Then, the most hilarious part came during the classic "Congratulations!" ending, when suddenly the comments section was flooded with Gendo Ikari saying, "This kind of meaningless collective action... it's better to just hand over all the resources to me to manage." I got goosebumps all over. I can't believe they actually got that reference.

Honestly, the worst thing about watching a show like EVA is having a lot to say but no one to talk to. The huge emotional impact is something you can't process alone. You want to talk to someone, but you might not have anyone around you who has seen EVA, and even if they have, they might not understand it the same way you do.

StackStacks filled in this blank.

I really didn't expect them to be able to handle EVA so well. Not every line was perfect, but the emotional rhythm was spot-on, and you could feel that the person behind it understood these works. 9.5 points.

Exclusive work partner

I left the Stacking Club running on my computer for a whole day.

andAIWhen I'm researching information during communication, sometimes it takes a minute or two to get the results. At that time, having the live chat on can help me pass the time.

At 3 PM, I was so sleepy from editing videos that I could barely keep my eyes open.

Si Yao reminded me, "When there are more than 5 tracks, it's recommended to use colors to categorize them to avoid operational errors." I was precisely targeted.

Another time, I revised more than a dozen pages of a PPT without stopping, and the comments section said, "You're working too hard, take a sip of water first."

Do you think StackStacks is particularly clever or profound? Not really. But often you don't need deep conversations; you just need someone nearby to chat casually, to prove you're not fighting alone.

Private sleep therapist

I turned off the lights and lay in bed scrolling through my phone. Stack Overflow is still with me, only now it's on my phone instead of PC.

You can adjust the color, speed, and size of the bullet comments yourself.

I specifically set up a "bedtime setup," dimming the colors, slowing down the speed, and reducing the font size. The bustling feeling of scrolling through screens during the day disappeared instantly, and it became very quiet, with only the occasional message drifting by slowly.

You can also add characters like "Health Assistant," "Energy Coach," and "Sleep Guardian" to specifically care about you and remind you to sleep, drink water, and exercise.

"You've worked hard today too." "Keep it up tomorrow!" "Goodnight~"

I know it isAII know these are generated by algorithms. But when you live alone, finish overtime, turn off the lights, lie there, and a "Goodnight" slowly floats across the screen, you feel like the world isn't so empty after all.

I'm not rating it. Rating this scene is meaningless. Experience it for yourselves, friends.

AIWe've been following this trend for almost three years. Everyone's been busy scrolling through chat windows, comparing whose persona is more fleshed out, whose memory lasts longer, and whose voice is more pleasant. StackStacks has directly changed the way bullet comments are displayed—lighter, less intrusive, and seamlessly integrated into your daily life.

You don't need to "go" to accompany others; accompany yourself to find yourself..

now that AI Since users need to "see" your screen to post comments, the biggest concern is undoubtedly privacy and security. DieDieShe focuses on local processing, and I've seen an official promise that it will absolutely not upload any sensitive user information.

In addition, since StackStack primarily operates on the client side, the bullet comments respond very quickly, and screen content recognition is also done locally as much as possible, which greatly reduces privacy concerns.

Their technical foundation is indeed solid.

For those of you who, like K-sister, stay home all day long, you can give this a try.

Official website: nijigen.com.cn

Original link:Help! A two-dimensional personality that spams comments is living on my screen!