Wikimedia Hackathon Northwestern Europe 2026/Showcases

Blog posts

Wikimedia Hackathon Northwestern Europe 2026, Addshore
Wikimedia Hackathon Northwestern Europe 2026 recap, Lucas Werkmeister
Wikimedia Hackathon Northwestern Europe 2026, Taavi Väänänen
Hiruwiki jaio da, matematika ukitu eta ikusteko teknologia librea, Galder Gonzalez (in Basque)
CommonsDB making progress at the Wikimedia Hackathon Northwestern Europe, Jan Ainali

Showcased projects

Talk page index to be used on Wikisource Talk Index: (Scribunto Module)

Phabricator task (optional):
Brief (2-3 lines): Module & template to create a table of talk topics related to all pages of a book, to be placed on book index talk page.
Relevant links: https://fr.wikisource.org/wiki/Mod%C3%A8le:Liste_des_discussions
Contact(s): Nivopol
Status (e.g., early concept, ready for beta deployment, production, etc.): to be documented for testing

Documenting how to get free access to the paid account features of Wikimedia Enterprise

Wikimedia Enterprise - Documentation (Jolan)

Phabricator task (optional): https://phabricator.wikimedia.org/T419989
Brief (2-3 lines): I've figured out how Wikimedia Enterprise gives free access to the 'paid account' features of its endpoints for Wikimedia community members, and have documented it in the (hopefully) correct places
Relevant links: updates made to:
Contact(s): CalvinBall
Status: Deployed in Prod

A Developer Starter kit for Newcomers

Phabricator task (optional):
Brief (2-3 lines): A single resource page which highlights the pathway for newcomers while emphasizing on key resources only.
Relevant links: https://meta.wikimedia.org/wiki/User:Eugene233/NewDevKit
Contact(s): Eugene
Status (e.g., early concept, ready for beta deployment, production, etc.): Early concept need help with making doc resource clustering simpler

Drop unused database tables on closed wikis

Phabricator task (optional): https://phabricator.wikimedia.org/T420052
Brief (2-3 lines): Closed wikis have many database tables only relevant if the site were still open. During the Hackathon, I identified X database tables over all WMF wikis that could be dropped.
Relevant links: https://docs.google.com/presentation/d/10b6jHdzOVEsg8fOwqtf0hV512qBdbhKbg8-AWMGqtiI/edit?usp=sharing
Contact(s): Dreamy Jazz/WBrown (WMF)
Status (e.g., early concept, ready for beta deployment, production, etc.): Ready to deploy to production next week for both

SensitiveViewer

Phabricator task (optional): https://phabricator.wikimedia.org/T418687
Brief (2-3 lines): I adapted the Swedish sensitiveViewer script for use on the Dutch Wikipedia. While implementing it, I made several major improvements and bug fixes that you might consider incorporating into the original version. Here is a summary of the new features I added:
Relevant links: https://nl.wikipedia.org/wiki/MediaWiki:Gadget-sensitiveViewer.js
- PRESENTATION
Contact(s): Nyo / Oliebolw001 / Deniz
Status (e.g., early concept, ready for beta deployment, production, etc.):

Bulk upload of roller derby game photographs to Commons & improve imagery on Wikipedia

Phabricator task (optional):
Brief (2-3 lines): Worked with photographer to get photos clearly licensed under CC-BY-4.0. Ingested ~350 images into Commons. Then worked with WikiCrowd / Custom Depicts tool to add structured data to it as well.
Relevant links:
Contact(s): Merlijn / valhallasw / Bubble Wizard
Status (e.g., early concept, ready for beta deployment, production, etc.): Done! (+ Wiki Crowd)

sharing sections gadget and username generator

Phabricator task (optional): https://phabricator.wikimedia.org/T18691
Brief (2-3 lines): meh
Relevant links: https://test.wikipedia.org/wiki/Test and https://user-name-generator.toolforge.org/
Contact(s): Amir Sarabadani
Status (e.g., early concept, ready for beta deployment, production, etc.): meh

Hiruwiki: visual mathematical proofs

Phabricator task (optional): https://phabricator.wikimedia.org/T419518
Brief (2-3 lines): Build a general gadget template that can load JS and CSS submodules with interactive mathematical and geometrical proofs.
Relevant links: https://eu.wikipedia.org/wiki/Wikipedia:Hiruwiki
Contact(s): Galder (User:Theklan)
Status (e.g., early concept, ready for beta deployment, production, etc.): In production, may need review and revisit. It can be expanded.

CommonsDB License Check

Phabricator task (optional): https://phabricator.wikimedia.org/T419872
Brief (2-3 lines): This prototype script generates an ISCC (a perceptual hash) during upload and checks CommonsDB if it's in there. If it is, it shows the license it has. If it is in there and Wikimedia is the provider, a warning that the file is already on Commons is shown to the user, both cases with links to the source so the user can make a judgement call.
Relevant links: Recorded demo: https://aina.li/videos/nwehack-showcase.mp4
Contact(s): User:Ainali
Status (e.g., early concept, ready for beta deployment, production, etc.): early concept

Rewriting Depictor to use Vue3 and PHP 8.4 (and a little easter egg)

Phabricator task (optional): https://phabricator.wikimedia.org/T419588
Brief (2-3 lines): Depictor is a tool to add SDC statements using a game-like interface optimized for mobile. It badly needed a rewrite to use Vue 3 and PHP 8.4 so many other improvements could be made.
Relevant links: https://hay-test.toolforge.org/
Contact(s): Hay Kranen and Bruno Perel
Status (e.g., early concept, ready for beta deployment, production, etc.): beta / testing

Making language names translatable on translatewiki.net

Phabricator task (optional): https://phabricator.wikimedia.org/T231755
Brief (2-3 lines): Extension:cldr has a lot of names of languages in other languages in PHP files, including some (LocalNames*.php) which are meant to be edited by Wikimedians, but the process to edit the PHP files is cumbersome. We want to make it easier to update these translations by moving them to messages that are translated on translatewik.net.
Relevant links:
Contact(s): Lucas Werkmeister (WMDE)
Status (e.g., early concept, ready for beta deployment, production, etc.): patches are up for review

Wikimedia Commons Caption Suggestion Tool — AI-assisted multilingual captions with human in-the-loop

Phabricator task (optional): https://phabricator.wikimedia.org/T420098
Brief (2-3 lines): Standalone tool to help Commons contributors add and improve multilingual image captions. You load a Commons file URL (or pick a random image), get AI translation suggestions into more languages, edit and validate, then send updates to Commons via the wbsetlabel API. Human-in-the-loop only; no automatic overwrites.
Relevant links: https://github.com/DSmit-WMF/wikimedia-commons-caption-engine
Contact(s): DSmit-WMF (Daphne
Status (e.g., early concept, ready for beta deployment, production, etc.): Vibe-coded concept / hackathon-ready. Future work could be:
Integrate into UploadWizard or other Commons flows.
Replace owner-only OAuth with per-user OAuth for multi-user use.
For demo input:
Demo URL: https://marvelously-beautiful-luca.ngrok-free.dev/ (Works now! )
slide: https://docs.google.com/presentation/d/1VbjbTE33Lq3UpvKQefqce68vMiDCJDehDXCfrDwJ6BQ/edit?usp=sharing
https://commons.wikimedia.org/wiki/File:ISS065-E-467810_-_View_of_Earth.jpg
Batch: https://commons.wikimedia.org/wiki/File:White_Houses_MET_sf43.46.10.jpg,https://commons.wikimedia.org/wiki/File:New_private_housing_estate_on_Castlewellan_Road_-_geograph.org.uk_-_5636754.jpg,https://commons.wikimedia.org/wiki/File:Chinatown_Manhattan_October_2024_164.jpg

Introduction

Phabricator task (optional): -
Brief (2-3 lines): Introduce Koen to Wikipedia, Wikidata, PyWikibot,
Relevant links: -
Contact(s): Ronald, Koen
Status: Succeeded

Extract subjects for reports

Phabricator task (optional): -
Brief (2-3 lines): Create a script to extract the main subjects for a list of reports
Relevant links: https://github.com/Ronnie-V/ReadSubjects
Contact(s): Koen, Ronald, Tsaag
Status (e.g., early concept, ready for beta deployment, production, etc.):

Information about pages on control list

Phabricator task (optional): -
Brief (2-3 lines): Create a PyWikibot-script to extract data about pages on a check list (nalooplijst) to nl-Wikipedia, so contributors are supported taking a decision about the status of the article
Relevant links: https://github.com/Ronnie-V/Nalooplijsten
https://nl.wikipedia.org/wiki/Wikipedia:Wikiproject/Nalooplijsten/Pvt_pauline/Status
Contact(s): Koen, Werner, Ronald
Status: beta deployment: extraction succeeds, needs some effort to write directly to the result page (now requires copying text from a CSV file)

Overview recent articles on my list:

Phabricator task (optional):
Brief (2-3 lines): As requested on Dutch Wikipedia.
Relevant links: https://github.com/Ronnie-V/Te-volgen-pagina-s
https://nl.wikipedia.org/wiki/Gebruiker:RonnieV/Te_volgen_pagina%27s/Resultaat
Contact(s): Werner, Ronald
Status: production

Solving the hackathon logo puzzle 😎

Phabricator task (optional):
Brief (2-3 lines):
Relevant links:
Contact(s): Hay, simon04, Krinkle, Thiemo Kreuz, et. al
Status (e.g., early concept, ready for beta deployment, production, etc.): SOLVED

Revealing the code behind the Hackathon logo (this can probably be combined with the previous item)

Phabricator task (optional):
Brief (2-3 lines): The Hackathon logo included a hidden code. After the other showcases of people describing how they solved the puzzle i'll show how the logo was actually created. (Maybe my talk can be merged with some of the other talks about the logo?)
Relevant links:
Contact(s): Hay Kranen / Husky
Status (e.g., early concept, ready for beta deployment, production, etc.): 'production' 😅

Support geocoding in Curator

Phabricator task (optional): https://phabricator.wikimedia.org/T412708
Brief (2-3 lines): Curator assists in uploading streel-level imagery available in Mapillary to Wikimedia Commons, in bulk. The tool now supports using geocoded information in generating the file titles. This allows to have better titles to the files being uploaded.
Relevant links:
Contact(s): DaxServer
Status (e.g., early concept, ready for beta deployment, production, etc.): First phase implemented and in production
Next stage: Integrate geocoding into automatic categorization of the uploads (using https://edwardbetts.com/geocode/) integrated into https://commons.wikimedia.org/wiki/Template:Taken_on

integraality

- User research − automatic date resolution rebinning for year groupings - Wikimedia Commons support

Phabricator task (optional): https://phabricator.wikimedia.org/T236590
Brief (2-3 lines): integraality users may group by date − until now this was cast to year level. But what if your dataset spans hundreds or thousands of years? Integraality will now automatically switch to grouping by decade, century, if there are more than 100 groups
Relevant links:
Contact(s): Jean-Fred (User:Jean-Frédéric)
Status: live

Photographs by Jacob Olie — Wikimedia Commons to Stadsarchief Amsterdam link rot fixer and metadata extactor

Phabricator task (optional): phabricator:T417617
Brief (2-3 lines): For 3.600 Commons photos by Jacob Olie (1834–1905), this tool fixes outdated, broken source links to their current source records on the Stadsarchief Amsterdam Beeldbank, and extracts descriptive metadata from those records.
Relevant links: https://github.com/KBNLwikimedia/photographs-by-jacob-olie and https://commons.wikimedia.org/wiki/Category:Photographs_by_Jacob_Olie
Contact(s): Olaf Janssen & Ciell
Status (e.g., early concept, ready for beta deployment, production, etc.): Finished

OAuth log fixes

Phabricator task (optional):
Brief (2-3 lines): Fixed how MediaWiki displays logs
Relevant links: https://phabricator.wikimedia.org/F72856149 https://phabricator.wikimedia.org/F72856137
Contact(s): taavi
Status (e.g., early concept, ready for beta deployment, production, etc.): patch merged

cleanup on arywiki

Phabricator task (optional): https://phabricator.wikimedia.org/T419999
Brief (2-3 lines): cleanup on arywiki using bot scripts and AutoWikiBrowser
Relevant links:
Contact(s): Ideophagous
Status (e.g., early concept, ready for beta deployment, production, etc.): complete on my side

Establishing process to add new Moroccan Arabic lexemes

Phabricator task (optional): https://phabricator.wikimedia.org/T420020
Brief (2-3 lines):
Relevant links: https://translatewiki.net/w/i.php?title=Special%3ATranslate&group=wikidata-lexeme-forms&language=ary&filter=%21translated&action=translate
Contact(s): Ideophagous
Status (e.g., early concept, ready for beta deployment, production, etc.): templates created and imported; the script to convert dataset to pipe-separated forms to be created; Translatewiki messages translation underway

Structured Data on Commons modeling for works without Wikidata item

Phabricator task (optional): https://phabricator.wikimedia.org/T337048
Brief (2-3 lines): Further discussion, documentation and practical testing of a basic proposal on how to describe files on Commons using SDC, in the situation where they show a creative work without Wikidata item.
Relevant links: Outcome: https://commons.wikimedia.org/wiki/Commons:Structured_data/Modeling/Works_without_Wikidata_item / Example file: https://commons.wikimedia.org/wiki/File:Aan_het_Spaarne_te_Haarlem,_RP-T-1921-145.jpg/ Notes: https://etherpad.wikimedia.org/p/SDC-modeling-NWE-hackathon-2026
Contact(s): Spinster, Lokal Profil, and several others (GreenReaper,...?) for feedback / input / examples
Status (e.g., early concept, ready for beta deployment, production, etc.): Hopefully ready for production

Batch OCR of museum labels

Phabricator task: https://phabricator.wikimedia.org/T419374
Brief (2-3 lines): I have a lot of museum pictures to import, my pain point is getting the data from the labels into a spreadsheet before using OpenRefine to create Wikidata items
Relevant links: Outcome : https://gitlab.com/sukkoria/kartelator/-/blob/de18dc0c863b28e448cd9664b7418e78052b10f0/experiments.ipynb
Contacts: Sukkoria
Status: Proof of concept, needs more work on image manipulation before OCR

Unicode Hieroglyphs

Brief (2-3 lines): Currently Hieroglyphs are displayed as small png images which are patched together and I try to migrate them away to use unicode characters
Relevant links: https://phabricator.wikimedia.org/T420101 ; before https://phabricator.wikimedia.org/F72856566 and after https://phabricator.wikimedia.org/F72856569 ; overview https://phabricator.wikimedia.org/F72856610
Contact(s): Zabe
Status (e.g., early concept, ready for beta deployment, production, etc.): early concept

Phabricator task (optional): https://phabricator.wikimedia.org/T419953 (+https://phabricator.wikimedia.org/T419994)
Brief (2-3 lines): Discuss and Document how to handle SPARQL Prefixes across Wikibases. Group discussion to come to some conclusion for a tangible small next step.
Relevant links: https://etherpad.wikimedia.org/p/2026.03_Wikibase_SPARQL_Prefix_%40_WMHack
Contact(s): T Arrow, GreenReaper, Addshore, Ollie Hyde, Lucas Werkmeister, Nikki, Ismael Olea
Status (e.g., early concept, ready for beta deployment, production, etc.): early concept, improving documentation of issues spanning last decade or so

Wikiportret 2026

Phabricator task (optional):
Brief (2-3 lines): Several improvements for Wikiportret
Relevant links: https://docs.google.com/presentation/d/1k8RfE1c8HaUY6oWSkeag3M9xeHPVjp6aV439kahI-_w/edit?usp=sharing
Contact(s): Mbch331 (Remko)
Status (e.g., early concept, ready for beta deployment, production, etc.): Ongoing project

Wiki as Git!

Phabricator task (optional):
Brief: Ever wanted to know who to blame for a specific part of an article?
Relevant links: https://wiki-as-git.netlify.app/en.wikipedia.org/Brazil%20at%20the%202026%20Winter%20Paralympics
Contact(s): @Nonox
Status (e.g., early concept, ready for beta deployment, production, etc.): wiki-as-git has existed for many years, the concept of seeing the Git history just by browsing a URL has been hacked this last hour :-)

Wikiportret 2026: upload module

Phabricator task (optional): we don't do that here
Brief (2-3 lines): Several improvements for Wikiportret & develop module that allows for VRTS members to upload images to Commons & to handle SDC + Wikidata formalities in once go.
Relevant links: wikiportret-upload.toolforge.org (not that much to see yet)
Contact(s): Daniuu
Status (e.g., early concept, ready for beta deployment, production, etc.): Ready for beta deployment

WikiCollector, Multiplayer XR game

Brief (2-3 lines): a game where wiki edits spawn as orbs you can collect in XR with a globe showing where the edits are from geographically
Relevant links: None
Contact(s): Berend, Ferron
Status (e.g., early concept, ready for beta deployment, production, etc.): Ready for beta

Upload Stash magic

Links:
- Presentation: https://docs.google.com/presentation/d/1fqZNO9x3-XRu9pumUc-cJOYjma2X88is0YLD0e3L3Nk/edit?usp=sharing
- Your upload stash content: https://commons.wikimedia.org/wiki/Special:UploadStash
Description: The
Note:
Contacts: Daan van Ramshorst (@Daanvr)
Status: Discused, some prototypes, no live code.

Rethinking Commons' category page

Phabricator task (optional): none
Brief (2-3 lines): Re thinking the Category page of Commons. We want to see we are on a Multimedia page. Move the subcats down, and make the description collapsible.
Relevant links: https://youtube.com/watch/MkC7_HTIYhA
Contact(s): User:TheDJ
Status (e.g., early concept, ready for beta deployment, production, etc.): early concept

Commons Telegram uploader

Phabricator task (optional): https://phabricator.wikimedia.org/T418669
Brief (2-3 lines): We made a uploader to upload through Telegram
Relevant links:
Contact(s): Siebrand & Maarten (User:Multichill)
Status: in beta deployment

WebRef bookmarklet supports DPG Media

Brief: the WebRef bookmarklet couldn't find the publication date on articles by the biggest newspaper publisher of the Netherlands, if code is accepted it can
Relevant link: https://en.wikipedia.org/wiki/User:V111P/js/WebRef
Contact: Vera de Kok (1Veertje)
Status: pending approval

Synchronising Wiki Loves Monuments Ukraine lists between Wikidata and Ukrainian Wikipedia

Phabricator task (optional):
Brief (2-3 lines): Continuing the work from Utrecht Hackathon. Generated the list of duplicate Wikidata IDs - and fixed all of them, and the list of Commonscats that need manual fix. Added images from Wikidata which were missing in Ukrainian Wikipedia lists
Relevant links: https://uk.wikipedia.org/wiki/Спеціальна:Внесок/NickKBot
https://uk.wikipedia.org/wiki/%D0%9A%D0%BE%D1%80%D0%B8%D1%81%D1%82%D1%83%D0%B2%D0%B0%D1%87:NickKBot/WLM_Commonscat
https://uk.wikipedia.org/w/index.php?diff=prev&oldid=47649378
Contact(s): NickK
Status (e.g., early concept, ready for beta deployment, production, etc.): partial production

GLAM + Commons

Brief: Finished my first GLAM project of a small Ukrainian museum (+PattyPan), next I go through other small Ukrainian museums helping them
Improving and updating a script to remove garbage from the code, still in beta:
Relevant links: https://commons.wikimedia.org/wiki/Category:Memory_of_The_Jewish_People_and_The_Holocaust_In_Ukraine_Museum
https://uk.wikipedia.org/wiki/%D0%9A%D0%BE%D1%80%D0%B8%D1%81%D1%82%D1%83%D0%B2%D0%B0%D1%87:Goo3/Scripts/EditPagesInSearch.js
Contact(s):
Status (e.g., early concept, ready for beta deployment, production, etc.):

pywikibot stuff

Phabricator task (optional): T416357
Brief (2-3 lines): Pywikibot 11.1 is published. Oauth2 is postponed, API limits are taken into account in PWB 11 and 11.1, more to come.
Relevant links:
Contact(s): @xqt
Status (e.g., early concept, ready for beta deployment, production, etc.): released

Commons Stockphoto gadget

Phabricator task (optional): https://phabricator.wikimedia.org/T419135#11709673
Brief (2-3 lines): Adopt standard thumbnail sizes. Add video support. Lots of bug fixes.
Relevant links:
- Before and after screenshots: https://phabricator.wikimedia.org/T419135#11709673
- Source code: https://commons.wikimedia.org/w/index.php?title=MediaWiki:Gadget-Stockphoto.js&action=history
Contact(s): Timo Tijhof (Krinkle)
Status: Deployed on Commons. Examples:
https://commons.wikimedia.org/wiki/File:Adam_Simmons,_Swaffham_Raceway,_2017-03-11.JPG
https://commons.wikimedia.org/wiki/File:Big_Buck_Bunny_4K.webm

To the Moon

Phabricator task (optional): https://phabricator.wikimedia.org/T160141
Brief (2-3 lines): GeoData allows to mark articles with primary and secondary coordinates, and search for them. The GeoData APIs however have always been hard-coded to support only Earth, nothing else. Commented in the code as "globe selection disabled until we have a real use case" since 2012.
Relevant links: https://en.wikipedia.org/wiki/Arnhem#/map/0
Contact(s): Thiemo Kreuz (WMDE)
Status (e.g., early concept, ready for beta deployment, production, etc.): merged

Addshore retention