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Maikel 🇪🇺 🇪🇸 @maikel@vmst.io
Public

@evanprodromou @cwebberChristine Lemmer-Webber I've tried to dive deep into Activity Pub as an option to make this: codeberg.org/maikelthedev/spar and I keep finding walls where the protocol fits but Mastodon, the software, doesn't, so I'm here asking you both directly:

> Is there an actual reference ActivityPub implementation?

The stochastic parrot is telling me the closest is GoToSocial but I can't obviously trust an LLM. I went all over the activitypub.rocks/, checked all the tools there, skim read pages and pages, watched many videos and still can't figure if there's such thing as a reference version. Is there such a thing?

Summary card of repository maikelthedev/sparkr, described as: The repository containing Sparkr, a federated Grindr alternative

sparkr

The repository containing Sparkr, a federated Grindr alternative

codeberg.org · Codeberg.org

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dansup @dansup@mastodon.social
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So one tricky aspect I had to solve with Loops is how we use a hashid of the snowflake id for videos, comments and replies in public links, but also deference them to their full ActivityPub permalink.

I built a `matchUrlTemplate` helper that uses regexes to match our url schemas in a way that supports `/v/abcdefg1-` and `/ap/users/1/video/1234567890` links.

It works great, and I will be bringing this to Pixelfed to improve federation support ✨

github.com/joinloops/loops-ser

The federated short video sharing platform. Contribute to joinloops/loops-server development by creating an account on GitHub.

loops-server/app/Federation/Handlers/LikeHandler.php at main · joinloops/loops-server

The federated short video sharing platform. Contribute to joinloops/loops-server development by creating an account on GitHub.

github.com · GitHub

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potatomeow @potatomeow@fosstodon.org
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in , an remote actor have an optional icon object, which essentially it's the actor's avatar metadata.

but in api, the icon object doesn't carry an "id" field in itself, so i cannot correctly map this icon into a more generic "attachments" table (because it requires the presence of id field) in my local instance when i import the remote actor.

some ppl created icon as jsonb to facilitate this non-generic "icon" field.

which isn't a great solution in its api design.

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Week in Fediverse :fediverse_light: @weekinfediverse@mitra.social
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Week in Fediverse 2026-01-16

Servers

- Mobilizon v5.2.2
- Owncast v0.2.4
- Epicyon v1.7.0
- Wafrn v2026.01.03
- PieFed v1.5.0
- snac v2.88
- ActivityPub for WordPress v7.8.3
- Sharkey v2025.4.5
- NodeBB v4.8.0
- NeoDB v0.12.8
- Trunk & Tidbits, December 2025 (Mastodon)
- WordPress Federation: Recap of 2025

Clients

- PleromaFE v2.10.1
- Mastodon for iOS v2026.1
- TangerineUI for Mastodon v2.5.3
- Aria v1.4.0
- Voyager v2.43.2

Tools and Plugins

- Fediway: Recommendation engine for Mastodon

Protocol

- FEP-f15d: Context Relocation and Removal
- FEP-ee3a: Exif metadata support

Articles

- The Forkiverse Experiment and Why Instance Choice Matters
- List of RSS feeds distributed by each software on Fediverse
- Fediverse Report – #149 – On Protocol Governance
- Mastodon for ActivityPub development

-----

#WeekInFediverse #Fediverse #ActivityPub

Previous edition: https://mitra.social/objects/019ba420-e45f-3802-6e4f-5f0767dcc2d4

5.2.2 · Kaihuri / Mobilizon · GitLab

📢 Announcement We are coming out of this beta phase as...

framagit.org · GitLab

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GENKI @nibushibu@vivaldi.net
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いいな。

:activitypub: に対応してないことだけが残念だけど応援してる！がんばれ mixi2 :tony_wee:

🔗 生成AIに対するポリシーについて : mixi2 ヘルプ
support.mixi.social/support/so

生成AIに対するポリシーについて

生成AIに対するポリシー 多くの創作者の方がSNSを通して活動を行っていることや、生成AIのトレーニングによる権利侵害に懸念を抱いていることを理解しております。 例えばmixi2が、mixi2上に投稿されたイラスト創作物を生成AIモデルのトレーニングに活用し、それを利用した新たなイラストコンテンツを生成するプロダクトを提供することはありません。 外部からの不正なクローリングやスクレイピングについて mixi2では、第三者によるクローリングやスクレイピングなどの行為を利用規約...

support.mixi.social · mixi2 ヘルプ

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Johannes Ernst @j12t@j12t.social
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ActivityPub standardization is back! The just announced a new Working Group to evolve and and related standards! This is extremely good news. It's not like all the world's federated social media protocol problems were already solved! lists.w3.org/Archives/Public/p

Call for Participation: Social Web Working Group Charter approved; Join the Social Web WG from Xueyuan Jia on 2026-01-15 (public-socialweb@w3.org from January 2026)

lists.w3.org

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Johannes Ernst @j12t.org@bsky.brid.gy
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ActivityPub standardization is back! The just announced a new Working Group to evolve and and related standards! This is extremely good news. It's not like all the world's federated social media protocol problems were already solved! lists.w3.org/Archive...

Call for Participation: Social Web Working Group Charter approved; Join the Social Web WG from Xueyuan Jia on 2026-01-15 (public-socialweb@w3.org from January 2026)

lists.w3.org

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GENKI @nibushibu@vivaldi.net
Public

:fediverse: :activitypub: がもうちょっと一般化するために自分にできることないかなあということを最近考えてる。

そもそもそんなことを実現する力は自分にはないし、 :mastodon: とかがソーシャルメディアのメインストリームになるべきだともあまり思ってないけど、
いつか時代が多少の後押しになり、また自然と注目が集まるときがポツポツとあるだろうという気はしており、その時まで大きくなりすぎずともこれが続いていてほしいなという気持ちは結構強くある。

メールとか :rss: みたいに流行り廃りとは多少距離を取りつつ、しっかり標準技術として世の中に生き残って欲しい :vivaldia_5:

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Chao-c' @xChaos@f.cz
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What would be optimal maximum number of poll options in ?

(Note: the participative polls, Google Doodle style, would be great for eg. negotiating meetings... but I understand the technical difficulties and risks and it is not supported by just now ...)

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New Social Web Working Group at W3C

Evan Prodromou @evanprodromou@socialwebfoundation.org

Today the W3C standards organization announced a new working group to advance the ActivityPub and Activity Streams standards. The Social Web Foundation, as a W3C member organization, will be participating in the group. The working group's goal is to release a backwards-compatible iteration of each specification in Q3 of 2026. Activity Streams was released in 2017, and ActivityPub was released in early 2018. Since that time, the experience of hundreds of implementers and millions of users has […]

Read more →
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Achim Domma @achim@social.saarland
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follow-up question: Thanks to @silverpill I made progress with my "Follow" request sent to Mastodon. After fixing a few more issues my current error message from Mastodon is:

"Could not refresh public key pub.saar.social/user/achim/key"

This URL returns my full profile having type "Person", which also contains the public key. The type "Person" is also used in the AP book by @evanEvan Prodromou which I use as a reference.

[...]

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dansup @dansup@mastodon.social
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Loops also uses snowflake ids for ActivityPub actor identifiers!

I noticed that Mastodon has adopted this too, great to see. I will be bringing this to Pixelfed later this year as well 😁

browser.pub/https://loops.vide

https://pixelfed.social/p/dansup/913202103935710537 · BrowserPub · A browser for exploring ActivityPub and the fediverse

Explore the open social web through the lens of ActivityPub and the fediverse.

browser.pub

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dansup @dansup@mastodon.social
Public

RE: mastodon.social/@dansup/115876

They also are ActivityPub objects that expand to the full id ✨

We use snowflake ids, then hashids in permalinks that expand. It's beautifully simple, yet clever.

d9VqOD2_gu => 236972985113375774

browser.pub/https://loops.vide

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Achim Domma @achim@social.saarland
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I try to implement an server in , have problems talking to and would appreciate some help.

I try to send a follow action to Mastodon. The request is - as far as I can tell - signed according to docs.joinmastodon.org/spec/sec

The "keyId" of the signatrue is "pub.saar.social/user/achim/key". Mastodon calls this url as expected and my server returns: [...]

Security - Mastodon documentation

Public key cryptography and supported signature schemes over HTTP and JSON-LD.

docs.joinmastodon.org

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Gilles DePemig :OpenAccess: @DePemig@social.coop
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I have a question about :
Is there a method for: Following from account xyz only post of a certain type (e.g., images) or a certain hashtag ().

As an example: I would like to be able only to see the comics that a comic artist posts, but not their further opinion. (type is only image)

Another example from the sender side: I am a music group and I would like to invite people to: "Follow for @mycrazycoolband"

Maybe @benpateBen Pate 🤘🏻 knows about this?

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Dawid Wiktor @dawid@vebinet.com
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The EU, as well as every country in the world, should be taking seriously the importance of sovereign systems for communicating and disseminating information.

The ActivityPub protocol is proven and makes many platforms compatible and accessible to each other, allowing for effective information sharing and communication.

The only reason many people do not leave X is that many important services and public figures remain on that platform. Therefore, if countries truly care about digital sovereignty and resilience, they should adopt and promote the use of open source platforms and networks based on the ActivityPub protocol, whether it is Mastodon, Pleroma, Vebinet, or another platform.

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Release v3.2.7 of Ktistec

Todd Sundsted @toddsundsted@epiktistes.com

The two big features in release v3.2.7 of Ktistec are back end support for creating polls (the front end is coming in the next release) and advanced theming support—specifically, a rich vocabulary of CSS class values and data attributes on which to build a theme. The full set is documented in the README. I'll post more on how I'm using these later this week.

Here is the full set of notable changes:

Added

  • Back-end support for creating polls.
  • Advanced theming support with new classes, data attributes, and view helpers.
  • Task status display on admin page showing running and imminently scheduled task counts.

Fixed

  • Poll vote form now correctly submits Question ID.

Changed

  • Move location of Ktistec version notice. (fixes #133)
  • Updated admin page for better accessibility and less clutter.

#ktistec #crystallang #activitypub #fediverse

Read more →
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Maho 🦝🍻 @mapache@hachyderm.io
Public

@PaulaticsSenator Paula Simons🇨🇦 social.canada.ca or connect.canada.ca would be nice.

Canada should have a public, federated social space.

A government-hosted Mastodon instance (e.g. social.canada.ca) would support open dialogue, transparency, and digital sovereignty, without ads, algorithms, or foreign platform lock-in.

This is public digital infrastructure, not another social network. This is sovereignty.

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ozoned @ozoned@btfree.social
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EU is calling for comments on open source strategies. MAKE YOURSELF HEARD!

Even non-EU citizens have a voice here.

NOW is a time to stand up and stand out! YOU want to help the Fediverse? Here's just one way today that YOU can REALLY make a difference:

The European Open Digital Ecosystem Strategy will set out:

  • a strategic approach to the open source sector in the EU that addresses the importance of open source as a crucial contribution to EU technological sovereignty, security and competitiveness
  • a strategic and operational framework to strengthen the use, development and reuse of open digital assets within the Commission, building on the results achieved under the 2020-2023 Commission Open Source Software Strategy.

ec.europa.eu/info/law/better...

#EU #open #foss #openSource #source #linux #activitypub #AP #fedi #fediverse

European Commission - Have your say

European Commission - Have your say

ec.europa.eu · European Commission - Have your say

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いしい＠試行錯誤 @ishii@ishii00141.stars.ne.jp
Public

特定のタグが勝手に付けられるバグが再現されるかテスト

テスト１：新規投稿で任意の６個のタグを付けてみる。

テスト１の結果：タグの数は関係なさそう。

テスト２：コードブロックを使って、その中にハッシュタグと間違えそうなものを入れてみる。

.section-3 { background-color: #27ae60; }

テスト２の結果：再現されました。上記のコードを入れたことで、ID=27のハッシュタグが勝手に追加された。たぶん、記事からハッシュタグを検出するアルゴリズムのバグ。

テスト３：コードブロックに入れたコードと似たコードを記事中に記載してみる。

.section-3 { background-color: #30ae60; } [...続きは下のURLで]

https://ishii00141.stars.ne.jp/20251224-0707-4873/

特定のタグが勝手に付けられるバグが再現されるかテスト

テスト１：新規投稿で任意の６個のタグを付けてみる。テスト１の結果：タグの数は関係なさそう。テスト２：コードブロックを使って、その中にハッシュタグと間違えそうなものを入れてみる。.section-3 { background-color: #...

ishii00141.stars.ne.jp · いしい＠試行錯誤

Link author: いしい＠試行錯誤@ishii@ishii00141.stars.ne.jp

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いしい＠試行錯誤 @ishii@ishii00141.stars.ne.jp
Public

Hello Fediverse!

ActivityPubというプラグインをインストールしてあるWordPressサイトです。

追記：このサイトで何ができるか、いろいろ試そうと思います。

追記：アプリやネットサービスなどを試しに使ってみた時の試行錯誤は、これまで@ishii00141いしいに投稿していたのですが、自分でも五月蠅いなと思っていたので、今後はこっちで行うことにします。Fediverseに送る必要はないのかもしれませんが…。

追記：マストドンなどでフォローする時のユーザーIDは @ の後 ishii@ishii00141.stars.ne.jp

https://ishii00141.stars.ne.jp/20250202-1025-1/
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いしい＠試行錯誤 @ishii@ishii00141.stars.ne.jp
Public

コメントと通知の関係を確認するテスト

以前、コメント欄から返信した際に、返信元以外に通知が届いてしまう問題があった。

"さらに、同じスレッドで、別のマストドンのアカウントｃ＠Ｃからａ＠Ａに返信（メンションはａ＠Ａ宛だけ）があった後、そのｃ＠Ｃの返信にａ＠Ａが返信しようとすると、ｂ＠Ｂへのメンションも追加されてしまいます。"コメント欄ではメンション先を選べない | いしい＠試行錯誤ishii00141.stars.ne.jp/2025021

今も同じかどうか確認するためのテスト。

この投稿はａ＠Ａの投稿x0

https://ishii00141.stars.ne.jp/20250311-0803-1646/
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いしい＠試行錯誤 @ishii@ishii00141.stars.ne.jp
Public

「連携された返信」でスレッド切断

#マストドン の投稿に #WordPress で「連携された返信」した後、マストドンからのリプライは #WordPress のコメント欄に表示されるが、そのリプライに対する「連携された返信」はコメント欄に表示されない。だから、後で確認する時に、スレッドの最初から追うと続きが分からなくなる。マストドンの方ならスレッドがリプライで繋がってる。その例が次の投稿のスレッド。

mastodon.social/@ishii00141/11

それぞれのリプライは次の通り。

"ａ＠Ａの返信x1"ishii00141.stars.ne.jp/2025041

"ｂ＠Ｂの返信y2" [...続きは下のURLで]

https://ishii00141.stars.ne.jp/20250412-1903-2678/
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いしい＠試行錯誤 @ishii@ishii00141.stars.ne.jp
Public

「連携された返信」のイメージ（v7.2.0）

　久しぶりに「連携された返信」のテストを行った。最初の頃は、自分の記事に対して「連携された返信」をした場合に返信された記事のコメント欄や管理画面のコメント一覧に表示されて、その「連携された返信」に「連携された返信」をした場合は、どちらのコメント欄にも管理画面のコメント欄にも表示されなかったのだが、今は最初の「連携された返信」の段階で、どちらにも表示されなくなった。　Fediverseではリプライとして扱われるのだが、リプライとして扱われるまでに少し時間がかかった。

　これまでは「バグ」として認識していたが、このような状態は「仕様」として認識した方が良いのかもしれない。

　他のアカウントに対 [...続きは下のURLで]

https://ishii00141.stars.ne.jp/20250801-1704-3247/
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