Will Ceolin

Coding, open-source, design, education. Building @zoonkcom

[Will Ceolin @CeolinWill]

I built an open-source tool for learning anything using AI:

- Type what you want to learn
- It creates a full course for you

Move from beginner to mastery of any subject, even complex things like Quantum Physics

It has three formats:

- Explanation: bite-sized lessons that you swipe like TikTok/Instagram
- Practice: solve problems in real-world situations
- Quiz: test your knowledge in Duolingo-like lessons
- Language courses have a different format covering vocabulary, reading, and listening skills

It's more hands-on than reading a long textbook or watching a video

Plus, it uses everyday language, so it's easier to connect complex concepts to your reality. I built the tool I wish I had when I was in school/uni

Of course, I'm biased but I've been using it for the past few weeks and I'm truly loving it. I can't imagine myself going back to learning through traditional ways

[Will Ceolin @CeolinWill]

I’d love to work on the codex team for a day just to fix three super annoying bugs that nobody else seems to care about

[OpenAI @OpenAI]

Building apps has never been easier.

With Sites, Codex can turn your work, ideas, and plans into an interactive website or app your team can explore, use, and share with a URL.

Rolling out to Business and Enterprise plans, before expanding more broadly.

[Jakub Krehel @jakubkrehel]

We're hiring a Founding Product Engineer and a few other roles at Interfere.

If you enjoy solving hard problems, care deeply about quality and want a lot of agency, come join us :)

There's a $15,000 referral bonus if we end up hiring someone you refer.

https://t.co/GCNKsYbnlq

[Will Ceolin @CeolinWill]

@thsottiaux Cmd+J to open the terminal is focusing the prompt box instead of focusing the terminal. This is super annoying

Plus, terminal opens last on last project opened and not the current active project. Both issues were introduced on last week’s update

[shadcn @shadcn]

You can now turn any GitHub repo into a registry.

Drop in a registry.json. Define your items. Install with the CLI.

Distribute components, utilities, config, docs, rules, design systems, workflows, agents, skills and more.

[Will Ceolin @CeolinWill]

I can’t be 100% sure there are no hallucinations but there are ways to minimize it. For most content, I’m using top reasoning models.

They hallucinate way less often than older models, so this isn’t a big issue like it used to.

I also have some evals to catch models that often hallucinate content.

Plus, the content is generated once and used by all learners who want to learn the same thing. So, every day, I manually review some of the generated content.

I can’t review it all yet because it’s a lot of content but, if this project works, I’ll also hire experts to manually review every generated content.

[Will Ceolin @CeolinWill]

I built an open-source tool for learning anything using AI:

- Type what you want to learn
- It creates a full course for you

Move from beginner to mastery of any subject, even complex things like Quantum Physics

It has three formats:

- Explanation: bite-sized lessons that you swipe like TikTok/Instagram
- Practice: solve problems in real-world situations
- Quiz: test your knowledge in Duolingo-like lessons
- Language courses have a different format covering vocabulary, reading, and listening skills

It's more hands-on than reading a long textbook or watching a video

Plus, it uses everyday language, so it's easier to connect complex concepts to your reality. I built the tool I wish I had when I was in school/uni

Of course, I'm biased but I've been using it for the past few weeks and I'm truly loving it. I can't imagine myself going back to learning through traditional ways

[Will Ceolin @CeolinWill]

@missbaddieella1 Let me know if you have any feedback after you try it

[Will Ceolin @CeolinWill]

@allancm Let me know if you have any feedback

[Will Ceolin @CeolinWill]

@sebuzdugan I kinda agree but hopefully I can improve on that eventually

[Will Ceolin @CeolinWill]

Fine. I’ll build myself

[Will Ceolin @CeolinWill]

Let me try this to see if it works.

is there really no open source Duolingo alternatives?????

[Will Ceolin @CeolinWill]

Let me try this to see if it works.

is there really no open source Duolingo alternatives?????

[Steven Tey @steventey]

how to launch a COSS in 2025:

> post tweet "is there really no open source {popular SaaS app} alternatives?????"
> QT said tweet with "fine, i'll build it myself" + a killer UI
> get 1K+ likes
> follow-up tweet w/ a git.​new link to repo
> profit 💰

this is also known as the @nizzyabi launch method 🐐

[Will Ceolin @CeolinWill]

You can also run it locally or self-host yourself (MIT license, do whatever you want with it), see https://t.co/vO4UwlwV0K

It's using the following stack:

- @nextjs
- @better_auth
- @shadcn
- @tailwindcss
- @aisdk
- @workflowsdk
- Postgres with @prisma ORM

Most of the tasks are powered by @OpenAI and @GoogleAI models

[Will Ceolin @CeolinWill]

Try it for free at https://t.co/cu3s8n6iBY

If you like it and would like to subscribe, use the coupon X30 to get 30% off forever, not only the first month (coupon expires on June 30)

[Will Ceolin @CeolinWill]

Codex on iOS is too good. I’m impressed by how well it works

[shadcn @shadcn]

The little floating window in Codex is brilliant. Didn't care for it at first but now I use it all the time.

[Will Ceolin @CeolinWill]

@theo next-intl. it’s the best i18n library for nextjs: https://t.co/4Wx3vDvNm4

[Logan Kilpatrick @OfficialLoganK]

Welcome to Gemini 3.5 Flash, our most powerful model to date. It pushes the frontier of intelligence, speed, and cost putting 3.5 Flash in a class of its own.

We spent the last 6 months making sure Flash is great for real world use cases. It's available everywhere now!

[Will Ceolin @CeolinWill]

I think Codex has behaved like this for a long time, tbh. I’ve sent feedback about it before. It deletes untracked files it didn’t create (eg, files created by me), unstages files I manually staged, and reverts changes I manually made to files it touched

I always have to add custom instructions on all my machines explicitly telling it not to do that

[Jan Amann @jamannnnnn]

🌐 next-intl 4.12 is out with useExtracted improvements!

→ Improved monorepo support
→ Stacked .po descriptions
→ Path-only references by default
→ Deferred one-off extraction
→ Another message ordering fix

See the release notes for details: https://t.co/6kE6rEXapC