Jihyeok Seo

Cherry On Top🍒

크림은 말차 맛이야

마휘핑 아라모드

가라르 킷사텐에서 만나보세요

오이카페 iOS/Android 테스트 버전이 출시되었습니다. 누구나 베타에 참여할 수 있어요. 다음 링크에서 다운로드 가능합니다!

iOS: https://testflight.apple.com/join/ZYS7gR8r
Android: https://play.google.com/apps/testing/cafe.oeee

오이카페 모바일 앱 베타 테스트 신청서를 받고 있습니다.

added #Letterbook (https://letterbook.com) and #Oeee (https://oeee.cafe) and updated the #Loops icon to the newer version by @nclmnicolas ⁂

오이카페에 이어그리기에 이어서 그림으로 답글을 달 수 있는 기능이 추가되었습니다! 그리고, 그림 상세 페이지에서 답글과 댓글을 한눈에 볼 수 있도록 개선되었습니다! 예시

The federated and networked oekaki board, Oeee Cafe, now support emoji reactions from the fediverse! You also get notifications from the fediverse as well.

마스토돈 스타일의 새로운 커뮤 플랫폼, 커뮹! 을 런칭합니다. 기성 소셜 플랫폼들을 커뮤 운영 방식에 끼워 맞추던 불편함을 해소하고자 시작된 프로젝트입니다. 당초 예상했던 것보다 뜨거운 관심에, 계획보다 빠르게 출시하게 되었습니다. 많은 응원과 관심 부탁드립니다. https://commu.ng

🙋

Building the official Hackers' Pub iOS app with Claude Code.

I'll write a detailed blog post soon, but I'm thrilled to share that Fedify has received investment from the Sovereign Tech Fund, which means I'll be able to focus exclusively on the Fedify project for the next year or so.

종이를 물고 있는 퍼렁공뇽

https://github.com/fedify-dev/fedify

@jihyeokJihyeok Seo Thanks for letting me know, and thanks for the offer of support! But money at the moment is not the issue. Unfortunately, I just don't have time at the moment to implement proper monitoring and making the system more resilient.
For now, I fixed it manually, so it should work again.

@crepelsSebastian Jambor Thank you so much for the effort. I've built ActivityPub support into https://oeee.cafe and https://typo.blue using https://activitypub.academy. It's been an invaluable resource for me and numerous other ActivityPub application developers!

@crepelsSebastian Jambor Hi. It looks like https://activitypub.academy is down. Is there anything I can do to help keep the site running? (donations, etc.)

최근 며칠간 WAH라는 이름의 WebAssembly 인터프리터를 만들고 있다. ~와! 샌즈!~

WAH의 특징이라면 C로 작성되어 있는데 헤더 하나로 구성되어 있다는 점과, 거의 대부분의 코드를 Gemini가 짰다는 것 정도일까? (Claude Code도 좀 사용했지만 코드 생성은 Gemini가 다 했다.) Gemini가 디버깅을 시키면 답답한 게 사실이라서 최대한 프롬프트에 정보를 많이 넣고 few-shot으로 생성하게 하는 걸 목표로 했는데 생각보다 잘 되었다. 예를 들어서 한 프롬프트는 다음과 같았다. 저 문장 하나 하나가 시행착오의 결과이다.

@wah.h 에 if~else~end 명령을 구현하고, 대응되는 test_*.c 파일들이 모두 성공하도록 (또는, 해당 테스트에서 잘못된 점이 있을 경우 그 원인을) 고쳐줘. 아직 loop 관련된 코드는 처리할 필요 없고 테스트 중에 그걸 테스트하는 게 있다면 주석 처리해(지우지는 마). 컴파일과 실행은 &&로 한 번에 하도록 해. 정확한 구현 방법은 이래야 해: if~else~end에서 마지막 end는 사라지고, if는 else 직후 명령으로 이동하는 conditional jump로 재활용하며, else는 unconditional jump로 바뀌어(즉 실행기 입장에서 br과 else의 동작은 똑같아야 해! else를 아예 없애고 br로 대체할지 말지는 알아서 정해). 그러니까, if A B C else D E F end G 같은 명령이 있다면 preparsing 이후에는 if <offset to D> A B B C else <offset to G> D E F G 형태가 되어야 한다는 뜻이야. WebAssembly 명세에 따르면 if 문에는 block type이 따르는데, 이 타입을 사용해서 validation을 진행하는 것도 정확히 구현해야 해(block type이 function type (T1..Tn)->(U1..Um)이면 현재 스택에 T1..Tn 타입이 들어 있고 end 이후에는 U1..Um 타입이 들어 있어야 하고, 일반 타입 T가 들어 있다면 ()->(T)와 동일하게 취급함). block type은 validation 이후 preparsing 과정에서 사라져서 런타임에는 반영되지 않도록 해.

솔직히 너무 많이 요구하는 거 아닌가, 안되면 validation 부분을 어떻게 뺄지 고민하고 있었는데 시도 세 번만에 800줄짜리 diff가 떡하니 나오고 일단 보기에는 틀린 부분이 없어서 놀랐다. 물론 삽질도 많이 했는데 가장 많이 한 삽질은 테스트를 작성할 때 수동으로 WebAssembly 바이너리를 짜면서 바이트 숫자를 잘못 세어서 오류가 나는 거랑, 분명 WebAssembly opcode를 사용해야 하는데 자기 마음대로 코드를 정해 버린다거나 하는... 그런 우스운 상황이었다.

우습기도 하고 놀랍기도 하지만 이 코드를 내가 직접 짜지 않는 이유는 귀찮아서...라기보다는 내가 이걸로 하고 싶은 일이 따로 있고 WebAssembly 인터프리터를 만드는 게 주 목표는 아니기 때문이다. (원래 하고 싶은 일은 나중에 언급할 듯.) WebAssembly 구현이라고 하면 기술적으로 복잡해 보이지만, 내 용도에서 유래하는 몇 가지 조건(대표적으로 결정론적인 동작)을 제약으로 걸면 기술적으로 복잡하다기보다는 그냥 노가다에 가까워지기 때문에 끌리지 않는 것도 있긴 하다. 이전의 Angel이 과연 얼마까지 바이브 코딩으로 할 수 있는지를 테스트하는 목표였다면, 이번에는 정말로 목표를 달성하는 수단으로 기능할지 실험해 볼 작정이다.

나루 UI를 전면적으로 개편했습니다. 먼저 메인 화면에 오이카페와 타이포 블루의 광고를 넣었고요 (...) 파일 탐색기와 에디터를 좀 더 사용하기 편하게 개선했습니다. 또, 어떤 이유로든 나루를 떠나 다른 곳에서 사이버 보금자리를 차리고 싶은 분들을 위해 나루 갠홈 다운로드 기능을 추가했습니다. 앞으로도 잘 부탁드립니다!

I wrote a post on my blog after a long time: Recent open source development updates.

oeee.cafe/collaborate 오이카페에 넷캔 기능이 추가되었습니다! 저주피 없는 오이깎이 넷캔을 2025년도에 느껴 보세요. 넷캔 세션을 시작한 다음, 공유 버튼으로 세션 링크를 함께 그리고 싶은 분에게 공유하면 됩니다.

오이카페 이슈 트래커에 ActivityPub 관련해서 기여할 수 있는 이슈를 몇 가지 등록했습니다!

@z9mb1wwj 오이카페? https://github.com/yangnaru/oeee-cafe

나라아빠 #oeee_cafe

진짜 예나 지금이나 마우스로 그림 기깔나게 잘 그리는 사람들은 뉴타입인 게 분명함

요즘 오에카키 같은 2000년대 초반 인터넷 유물?같은 게 종종 머릿속에 떠오르는데 분명 내가 어릴 때여서 추억화된 것 때문인 걸 알고 있음에도 그 시절 인터넷 서브컬쳐들이 좀 그리울 때가 있다. 뭔가 그 특유의 투박한 디자인들이 자꾸 떠오름...

Every CLI tool has the same validation code hidden somewhere:

• “option A requires option B”
• “can't use X and Y together”
• “this only works in production mode”

I got tired of writing it. So I built something that makes it unnecessary.

https://hackers.pub/@hongminhee/2025/stop-writing-cli-validation-parse-it-right-the-first-time

SF숏포머블 공모전 장려상 https://www.sfstory.co.kr/community/notice/view/147

오이카페 디스코드 서버를 만들었습니다!

Hackers' Public 포스터 완성~ https://public.hackers.pub/

Fediverse Report – #131

The News

IFTAS founder Jaz-Michael King wrote an excellent blog post titled ‘There is One Fediverse. There are a Million Fediverses.’, that I think is worth reading. In it, King describes the fediverse as a large plurality of places, that can account for humanities wide-ranging diversity in cultures, languages and identities. King concludes: “I don’t want to grow “the fediverse”, because there is no single “the” fediverse. I want to help humanity step out of walled-in, private platforms and onto the open social web – a web where everyone can exercise their rights to free expression, free association, and just as importantly, the right to choose who they associate with.”

This dual mode of thinking, either the fediverse as a single place, or the fediverse as a large plurality of partially-connected places, popped up again this week related to Bluesky. Mississippi’s new Age Assurance Law puts stringent requirements on social media platforms to put in age verification checks. Bluesky has various concerns about this new law, decided they could not comply with it, and decided to block Mississippi IP addresses, effectively removing themselves from the state. This led to a whole set of discourse on the fediverse about the decentralised nature of Bluesky, considering they can just blacklist an entire state, in a way that impacts virtually all users on the network.

This supposed centralised nature of Bluesky is then put into contrast with the decentralised nature. However, the language of this conversation, and which fediverse is being discussed, matters here. Talking about Bluesky’s decision, Mastodon CEO Eugen Rochko says: “And this is why real decentralization matters. There is nobody that can decide for the fediverse to block Mississippi.” This response makes sense from a perspective of the fediverse as a single place: there is no owner of this singular fediverse which can make such decisions. But this ‘singular’ fediverse is only a conceptual thing: instead there are “10.000+ fediverse operators across the world get to make that decision for themselves.” as Rochko also says.

What stands out to me about the conversations on the fediverse is how much focus is placed on the singular fediverse, and how its decentralised nature can be a powerful tool for dealing with government overreach. In contrast, very limited attention is given to the very real problem that this means that there are a large number of server operators who do have to make the challenging decision for themselves: do they comply with Mississippi’s Age Assurance Law, block access to Mississippi IP addresses, or ignore it altogether? In the big picture, the singular fediverse’s decentralised nature looks like a great way of dealing with age verification laws. But once you zoom in further and see a million fediverses, the picture becomes a whole lot more complicated: it means that thousands of (volunteer) server administrators are making difficult decisions. They’ll all have to decide for themselves if and how they want to comply with this new law. The stakes are big: failure t comply can be fined up to $10,000 per violation.

While this singular fediverse can be a powerful framing tool, I think it’s worth paying attention to how King describes the value of a million fediverses. Viewing the fediverses as a large number of independent places, shows both the value in diversity that it allows, as well as the very real challenges that individual server operates face when it comes to complying with global regulations.

None of the large fediverse servers have so far complied, neither with the UK’s Online Safety Act, nor with this new Mississippi regulation. I am very much not a laywer, but neither laws have clear exceptions that would apply to Mastodon servers as far as I can tell. In that context, I find Rochko’s comment of “Technically, you’re probably also breaking laws in Afghanistan, Iran, North Korea and so on. The question is, do you care?” to be slightly concerning.

Bounce is a new tool that allows people to move their following graph across protocols. It is made by A New Social, the organisation behind the bridging software Bridgy Fed, and it is now available in beta. In it’s current version, it allows people to port their Bluesky social graph to their Mastodon or Pixelfed account. I’ll have more writing on Bounce out in the next few days, but for more coverage you can read Sarah Perez’s TechCrunch article about Bounce.

CrowdBucks is a new fediverse-native payment platform, that allows for crowdfunding, tipping and more. It is created by Charles Iliya Krempeaux (aka @reiver), who also organised the recent FediCon conference in Vancouver. Reiver explains that the “long-term vision that CrowdBucks is a part of is to create a payments layer for the Fediverse”. What stands out about CrowdBucks is that it does not require people to create a new account, instead they can sign in to CrowdBucks with their existing Mastodon account. Other software platforms are also planned to be supported later.

When you are logged in to CrowdBucks, you can set up your profile donation tiers, or goals. When you visit a link to a CrowdBucks profile page, you can again log in with your existing fediverse account and donate. Donations go through Stripe, and the team also expects other payment methods to be implemented later.

The platform is still in its early stages, with some notable missing features the ability to share content with your subscribers, or lock content behind donation tiers. CrowdBucks is open-source, and the code is available here. Payment systems on the fediverse have proven to be challenging, as last year’s Sub.club experiment indicates. CrowdBucks does have the outline of what a fediverse-native donation platform can look like however, and it’s exciting to see it develop.

The Fedilabs client now has meaningfully different versions between FDroid and Google Play’s Android, due to Google requiring them to remove various features, such as donation links and the ability to register an account. Various PeerTube videos also had to be removed from the client to exclude videos that explain how to download YouTube videos. This is one of the small news items that I think has fairly large implications down the line: Google’s Play Store and Apple’s App Store are major gatekeeping systems that the decentralisation of the fediverse has a difficulty in bypassing. As such, I expect censorship issues and governments trying to wrestle control over decentralised systems to focus on clients, much more than on servers.

Oni is a new single-user ActivityPub server, and what stands out about Oni is that it uses ActivityPub client-to-server part of the protocol. This part of the ActivityPub protocol determines how clients should communicate with servers using ActivityPub. Very few fediverse platforms use this part of the official protocol specification, and almost all platforms use another implementation, with the Mastodon API being the most popular. This is incidentally also a major contributing factor to Mastodon’s influence over the entire fediverse, as it effectively owns half of the protocol that most of the network runs on. Using ActivityPub Client-to-Server part of the protocol is challenging, as it is a chicken-and-egg problem: virtually no servers support it, but no client supports it either. In the case of Oni, that means that using Oni requires using a specific client to post to the server, Box. Box is another project by the same developer, and a basic fediverse client that focuses on supporting ActivityPub Client-to-Server.

In their latest monthly update, Mastodon mentioned that they are working on adding starter packs. Another initiative for starter packs is by fedidevs.com, which features already a collection of starter packs, in ActivityPub format. Developer Julian Fietkau says that these will likely be compatible with Mastodon in the future. One difference so far is that Mastodon plans on giving people control over being included in a starter pack, a feature that starter pack on fedidevs.com currently do not have.

In Other News

• WeDistribute is launching a weekly newsletter, Relay, with a roundup of links to all the news around the open social web.
• Event planning software Mobilizon has gotten new funding from NLnet, and they are looking for community input on improvements to the software.
• Oeee Cafe is an Oekari drawing board that has added support for ActivityPub. Oekari drawing boards are sites where people can draw with basic tools in their browser and share the images.
• A sneak peek at upcoming tool ActivityPub Fuzzer, which lets ActivityPub developers test compatibility against other fediverse platforms with simulated messages.
• A preview of what Mastodon’s upcoming quote posting feature will look like.
• NeoDB-You is a new Android app for culture review platform NeoDB.
• Mona, a iOS Mastodon client, has a variety of new features including automatic alt-text creation and additional translation options.
• Pachli, a Mastodon client for Android, now supports on-device translation, without using Google.
• IFTAS is holding a survey under fediverse moderators. as part of their yearly Needs Assessments Report.

The Links

• The Fireside Fedi interview streams talks with Robert W. Gehl, who recently published the book “Move Slowly and Build Bridges: Mastodon, the Fediverse, and the Struggle for Democratic Social Media”. I’ll do my own review of the book somewhere in the next few weeks as well.
• An overview of all the upcoming conferences for the open social web.
• WeDistribute’s Sean Tilley describes his experience with the recent FediCon conference, with some of his key takeaways from the event.
• Mastodon developer David Roetzel gave a talk at the FrOSCon conference, about what’s new with Mastodon and the wider fediverse, with a VOD available here. Mastodon head of communications Andy Piper gave a keynote at the conference, on the importance of open source for sovereinty.
• This week’s fediverse software updates (and the week before).

#nlnet

https://connectedplaces.online/reports/fediverse-report-131/

메론빵

빵집에서 더 이상 메론빵을 팔지 않는대요

참여 신청 완료!

Hackers' Pub 티셔츠를 제작 주문했습니다. 9월 3일(水)에 출고 예정이라고 합니다. 비용은 339,300원 들었는데, 총 17장 주문했으니 한 장에 2만원(배송료 미포함)이 되겠습니다.

@jihyeokJihyeok Seo @kodingwarriorJaeyeol Lee @z9mb1wwj @w8385박근형 @2chanhaeng초무 @nebuletoHaze @morealLee Dogeon @yihyunjoon현준 @seha 아마 주문하신 대부분은 저랑 직접 만나서 전달 드릴 수 있을 것 같긴 한데, 배송이 필요하신 분은 제게 DM으로 이름, 연락처, 주소지, 우편번호를 알려주시기 바랍니다!

감사합니다.

@hongminhee洪 民憙 (Hong Minhee) @silverpill It looks like I need an invite code to join mitra.social. Can you provide me one?

해커스펍에서 오이카페 링크 뜰 때마다 썸넬로 내 염버니 그림이 보여서 부끄러움... ㅋㅋㅋ

낙서장 - @oekaki낙서장 お絵かき

포켓몬! - @2a78c025-5702-49c3-bb46-38e02574f47f

페르소나!! - @2317e2a2-60f8-4649-bf31-37262aa9a6f8스플래툰 낙서하기

스플래툰 - @2317e2a2-60f8-4649-bf31-37262aa9a6f8스플래툰 낙서하기

레드 - @red빨강 あか Red

그린 - @green초록 みどり Green

블루 - @blue파랑 あお Blue

@liaizonwakest ⁂ @hongminhee洪 民憙 (Hong Minhee) @oeee_cafeお絵かき OEEEカフェ 🥒 @jihyeokJihyeok Seo

Nice! I've lined this #AGPL licensed project up to be included in the delightful fediverse experience curated list at..

https://delightful.coding.social/delightful-fediverse-experience

I found the codebase on github at..

https://github.com/yangnaru/oeee-cafe

#ActivityPub #fediverse #SocialWeb

@silverpill @hongminhee洪 民憙 (Hong Minhee) Thank you for the report! I’ll take a look at this!

@hongminhee@hollo.social洪 民憙 (Hong Minhee) @jihyeokJihyeok Seo @hongminhee@oeee.cafe洪兔 ow wow that amazing, I was just looking at a #oakaki platform that added #atproto support recently, it's interesting to see those nieche communities finding the power of decentralization!

As @hongminhee洪 民憙 (Hong Minhee) recently posted about

A new drawing community called https://oeee.cafe (@oeee_cafeお絵かき OEEEカフェ 🥒) made by @jihyeokJihyeok Seo and others just implemented #ActivityPub and joined the #fediverse. It's exciting to see niche art focused software using these tools and techniques to share in our weird network we have here.

via https://hollo.social/@hongminhee/0198e1eb-67ba-76dc-a5a6-934c20bf968b

announcement post: https://hackers.pub/@jihyeok/0198e00f-04e9-77dd-abb8-b3d6a2b42808

Excited to share some great news from the #creative community! Oeee Cafe, a fantastic oekaki #drawing platform, just added #ActivityPub support today. This means all the amazing artwork being created there can now be shared and discovered across the #fediverse, which is such a wonderful step toward connecting creative communities.

Big shoutout to my friend @jihyeokJihyeok Seo for building this platform and bringing it to the fediverse. It's always inspiring to see developers creating spaces for artists and then opening them up to the broader federated community. If you're into digital art or just appreciate seeing creative work, definitely worth checking out what people are sharing from Oeee Cafe on your timeline now. You can find me there at @hongminhee洪兔 if you want to connect!

#oekaki

@hongminhee洪 民憙 (Hong Minhee) @z9mb1wwj 팔로우가 안 됐는데 글이 왜 보이나 했더니 ㅋㅋ

@z9mb1wwj 감사합니다 🥳🥳🥳

@z9mb1 를 팔로우하면 타임라인에 수제 그림이 뜰 겁니다.

@hongminhee洪 民憙 (Hong Minhee) @z9mb1wwj 오 뭔가 버그가 있었나요

@z9mb1wwj 일단 팔로우를 하셔야 합니다!

I added ActivityPub support to Oeee Cafe, which is a safe-for-work Oekaki-style drawing board.

You can view the handles for artists or communities you like in the profile or the community main page. Subscribe and get new artwork right in your Fediverse timeline!

Special thanks to @hongminhee洪 民憙 (Hong Minhee) who helped me implement ActivityPub. Quoted is his drawing in the early days of Oeee Cafe.

오이카페에 ActivityPub 지원이 들어갔습니다. 이제 좋아하는 작가나 커뮤니티의 새 그림을 연합우주에서도 받아 보세요!

작가 프로필이나 커뮤니티 메인 페이지에서 ActivityPub 핸들을 확인할 수 있습니다.

인용된 그림은 ActivityPub 연동을 도와주신 @hongminhee洪 民憙 (Hong Minhee) 님이 오이카페 초창기에 그려 주신 고양이 그림입니다. 감사합니다!

Hackers' Pub은 현재 Fresh 프레임워크로 만들어져 있는데, Fresh 프레임워크의 한계를 벗어나기 위해 GraphQL + SolidStart 스택으로 넘어가는 작업(web-next)을 진행중입니다. 진행 상황을 관리하기 위해 에픽 이슈를 만들었습니다.

나도 오이카페(https://oeee.cafe)에 그림 올려봤다

@z9mb1wwj 오이카페 많관부 🥳🥳🥳

oeee.cafe에 새로운 커뮤니티를 열었습니다.