changelog

What's new at Dometrain

New features, improvements, and content, shipped every week.

October 2026

A lighter Java engine, and SkillScore for Rust and Python

Java lessons get a new engine that loads faster, two more SkillScore assessments arrive, and the AI assistant goes further on long conversations.

Content

SkillScore adds Rust and Python

Rust digs into ownership, borrowing, lifetimes, traits and drop order. Python covers the data model, closures, generators, typing, asyncio and the 3.14 changes.

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Improved

Java exercises load faster

Java lessons now run on a new in-browser engine that is a much smaller download, so exercises are ready to run sooner, especially on a slow connection.

Improved

More conversation for your tokens

Long conversations with the AI assistant now use less of your weekly token allowance, and its replies stay smooth even when the chat gets long.

Improved

Smaller fixes

Code in lesson instructions keeps its spaces, so padding and trimming examples show exactly what they mean. The lesson player fills the window when you zoom the page, coupon codes no longer get cut off on narrow phones, and the Linux terminal starts a little faster.

September 2026

TypeScript and JavaScript join SkillScore

Two more SkillScore assessments, an exercise layout that remembers you, and an AI assistant that waits for your question.

Content

SkillScore adds TypeScript and JavaScript

TypeScript tests what the checker infers, rejects and erases, from narrowing to mapped and conditional types. JavaScript sticks to the language itself: coercion, closures, this, prototypes, promises and the order things actually run in.

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Improved

Your layout stays put

Drag the divider between the instructions and the editor once, and every code exercise opens with the same split.

Improved

The AI assistant waits to be asked

The learning assistant no longer writes the solution for you unless you ask it to.

Watch at your own speed

Fine-grained playback speed, a C# editor that keeps up with your typing, and an easier way to go from trial to Pro.

New

Any playback speed you like

Pick a preset from 0.75x to 3x, or set your own speed anywhere from 0.25x to 3x in small steps. The < and > keys nudge it slower or faster while you watch.

Improved

C# editor stops freezing as you type

Error checking in C# lessons is many times faster, so the editor keeps up with your typing instead of stalling while it checks your code.

Improved

Submit from the keyboard

Exercises now show the submit shortcut right on the button: once your tests pass, Ctrl+Alt+Enter (Cmd+Alt+Enter on Mac) submits, alongside Ctrl+Enter to run.

Improved

Go Pro straight from your trial

On a Pro trial? The Pro page shows how many days you have left and lets you activate Pro early on the plan you already picked, without starting a second subscription.

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A Stop button for your console

Programs waiting on input can be stopped, terminal lessons finish from inside Vim, and F# gets autocomplete.

New

Stop a program that keeps asking

When your code asks for more input than you meant to type, press Stop (or Escape) in the console. The remaining inputs go in empty and you see your output, with no page reload needed to get the Run button back.

Improved

Finish terminal lessons from inside Vim

Linux lessons notice you have completed the last step even while you are still in Vim, less or another program, so you can submit without quitting first.

Improved

Autocomplete for F#

The editor suggests as you type in F#, with signatures, hover help and parameter hints for the core List, Seq, Map, Option and String functions.

Improved

SkillScore plans include exercises

Your SkillScore study plan now points you at specific hands-on exercises as well as video lessons, each marked so you can tell them apart.

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Improved

Read-aloud starts right away

Narration on exercise instructions and blog posts begins almost at once, instead of waiting for the whole recording to download.

Your language, everywhere in a lesson

Translated lesson content now reaches diagram and hands-on exercises, and the language list grew from 10 to 29.

New

29 languages, now on exercises too

Lesson instructions translate into 29 languages, up from 10. The picker also works on diagram and hands-on exercise lessons now, not just video ones, and your subtitle language and caption styling stay put between lessons.

New

A mobile app is on the way

We have been building a Dometrain app so your courses travel with you. Nothing to install yet, but the course links you already have will open straight into it when it lands.

August 2026

Bookmark any lesson

Save the lessons you want to come back to, and stay in fullscreen from one video to the next.

New

Bookmarks

Star any lesson from the player or the curriculum sidebar and it lands in one list in your dashboard. Handy for the explanation you already know you will want again.

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Improved

Fullscreen that stays

Fullscreen now carries across from one video to the next instead of collapsing every time a lesson ends. It steps out on its own when the next lesson is not a video.

Improved

Sharper autocomplete

C# and JavaScript suggestions stop offering you variables from scopes you are not actually in. Method signatures in lesson text are also highlighted as the right language instead of being guessed at.

Improved

Go exercises stopped crashing

Go lessons no longer fall over on a common pattern that returns several values at once.

Three new courses, and tokens back when the agent gives up

C, C++ and PHP get full beginner courses, and the AI agent refunds you when it cannot get your exercise working.

Content

Hands-On: C, C++ and PHP for Beginners

Three more languages get the full hands-on treatment. Every lesson is an exercise you write and run in the browser, graded on what your code actually does.

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Improved

Tokens back when the agent cannot help

If the AI agent fails to get your exercise passing, the tokens for that whole turn go straight back to your balance. You also get told what happened instead of being left guessing.

Improved

Remove your profile photo

You can clear your profile picture and drop back to the default avatar, instead of being stuck with whatever you uploaded once.

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Improved

Certificates count toward achievements

Downloading a certificate now registers properly, so the achievements tied to it unlock like they should.

Improved

Exercises that keep up with you

C and C++ exercises compile faster, C# stopped mistaking working code for an infinite loop, terminal lessons advance the moment you finish them, and hammering the run button no longer confuses the runner.

Quizzes you can actually read

Code in quiz questions renders as code now, and the editor learned to autocomplete Go and PHP.

Improved

Quizzes, rebuilt

Code blocks in questions render as real, syntax highlighted code instead of collapsing into one long unreadable line. Multi select questions score correctly, and reopening a quiz you already passed shows what you answered last time, with a button to clear it and try again.

Improved

Autocomplete for Go and PHP

The editor suggests as you type in Go and PHP lessons. Go completions know the packages you imported and can add the import for you.

Improved

Faster where it was slowest

Java exercises start and run noticeably quicker, and the Linux terminal got a large responsiveness pass.

Improved

Feedback you can see

When we act on something you reported, the notification quotes what you actually wrote, so you know which report it is answering.

Bash, Vim, and a quieter way to learn

Two new terminal courses land on the in-browser Linux machine, and Zen mode switches off everything that interrupts you mid lesson.

Content

Hands-On: Learn Bash

Ten chapters of real shell work in a disposable Linux terminal. Files and pipelines first, then variables, conditions, loops, functions and exit statuses. Every exercise is graded on what your commands actually did, so there is no passing by reading.

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Content

Hands-On: Learn Vim

Learn the editor that is already installed on every machine you will ever log into. It starts with getting out without losing work, then builds up motions and operators, search and substitute, buffers, registers and macros. Grading looks at the file you saved.

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New

Zen mode

One toggle silences the XP popups, the confetti and the achievement toasts, so a lesson is just the lesson. Everything still counts, it just stops interrupting.

Improved

Your terminal remembers

The Linux terminal keeps its transcript across a reload, so refreshing no longer wipes what you typed. It also boots with a proper startup screen instead of a blank rectangle.

Content

SkillScore adds Blazor

Blazor joins the lineup, with the same adaptive questions and the same map of what to study next.

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Improved

Fixes from your feedback

Exercises autosave your work, terminal lessons show their goal steps as you clear them, raw string literals stop tripping up the editor, and diagram lessons behave on smaller screens.

July 2026

Earn Gems, and a real Linux machine in your browser

Everything you finish now pays out in Gems you can spend on your profile and your editor, and a full Linux system boots inside a browser tab with a new course to go with it.

New

Gems: earn them, spend them, keep them

Finishing lessons, holding streaks and unlocking achievements now earn Gems. Spend them in the new Shop on profile accents, editor themes and editor fonts, and everything you redeem lives in the Vault so you never lose track of what you own.

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New

A real Linux machine, in a browser tab

A full Linux system now boots inside the lesson terminal, with a real file system and real commands, nothing to install. The new Learn Linux course puts it to work from your very first command.

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Improved

Make the editor yours

Pick the typeface you code in from ten monospace faces, and unlock more of them with Gems. Your choice follows you into every lesson.

Content

SkillScore adds Docker, Kubernetes, Git and GitHub

Four more skills you can put a real number on, with the same timed adaptive assessment and the same breakdown of where your gaps are.

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Improved

Clearer completion, steadier exercises

Interactive lessons now tell you exactly what is left before they will count as complete, instead of quietly refusing. SQL exercises recover after a failed statement, hung runs in Java, Go and Python give up instead of spinning forever, and the Go editor stopped crashing.

Find out how good you actually are

SkillScore is live: a timed, adaptive assessment that gives you a real rating for a skill, shows you exactly where your gaps are, and tells you what to study next.

New

SkillScore: your skills, measured

Take a timed assessment and walk away with a chess-style rating that says where you actually stand. Questions adapt to your answers as you go, so the result is honest, and you get a map of your weak areas plus the exact lessons that close them. Available now for C#, ASP.NET Core, and EF Core.

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New

Share your score, climb the weekly board

Your SkillScore gets a shareable page you can post anywhere, and the new weekly top ten on the leaderboard shows the highest ratings earned in the last seven days. The leaderboard itself got a full redesign with a podium and a live feed.

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Improved

Keep moving without lifting a finger

Pass a hands-on exercise and you can now flow straight into the next lesson. Turn on auto advance once and the player takes you forward every time you get it right.

Improved

Tell us what to build next

There is a new feedback form on the contact page for telling us what you want to see or what feels missing. When we act on it, you hear back in your notification center. Quiz lessons also joined the in-lesson feedback button, so you can flag a question the moment something looks off.

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Improved

Smoother hands-on lessons

System design diagrams drag more smoothly, the terminal cursor behaves, and your editor panel sizes are remembered between lessons. Exercises also recover on their own if the in-browser runner ever stumbles, and C, C++, and Python exercises handle more real-world code.

Real Git in your browser, and a dashboard rebuilt

A huge week: run real Git commands in a browser terminal, get a completely redesigned dashboard, take notes while you watch, and never lose a streak to one busy day again.

New

Learn Git by actually using Git

New Git lessons drop you into a real terminal running a real Git engine in your browser. Branch, merge, rebase, resolve conflicts, and hit the same errors you would hit at work, with a visual history graph, a source control panel, and a diff viewer beside you. Your repository is saved, so you can close the tab and pick up exactly where you left off.

Improved

Your dashboard, rebuilt

The dashboard is now a proper home base. Daily rings show your progress at a glance, your streak and next lesson greet you at the top, and courses, activity, achievements, and account settings each got a cleaner home in a simpler sidebar.

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New

A notification center that remembers

A bell in the header now keeps everything you need to know in one place: offers, announcements, and replies to your feedback. Notifications arrive live while you browse and stay in your inbox until you deal with them.

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New

Streak freezes have your back

Push hard on a good day and you bank a streak freeze. Miss a day later and the freeze is spent for you automatically, so one busy day no longer wipes out weeks of momentum.

New

Take notes while you watch

Video lessons now have a notes panel that stamps the exact moment you were at, so you can jump straight back to it later. The player also gained chapters, picture in picture, a quality selector, caption styling you control, and keyboard shortcuts with a cheatsheet, all gathered in one settings menu.

New

Your own code library

Save your own files inside the exercise editor and keep them for every lesson in that language. Build up scratch files, notes, and snippets as you learn, organize them into folders, and copy anything into the exercise you are working on.

New

Learning paths, made for you

Fixed, one-size-fits-all paths are gone. Tell us your goal and you get a personal path built around what you already know and where you want to end up, with a share link if you want to show it off.

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Improved

Achievements worth showing off

Achievements now come in tiers you evolve through, with brand new artwork for every one of them, grouped so you can see how far along each chain you are.

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Improved

A faster way around the site

The main menu was rebuilt with clearer sections and trending courses, and it finally feels right on a phone. The catalog also gained topic pages, so you can browse everything we have on a subject in one place.

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Improved

Mock interviews included every month

Every subscription now includes a set number of AI mock interviews each month, and the count resets monthly. Your remaining interviews are shown before you start one.

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Improved

Grab your certificate the moment you finish

Finished a course? Its page now shows you that you completed it and links straight to your certificate, no hunting required.

Dometrain, meet your AI assistant

Our biggest week yet: bring Dometrain into your AI assistant, practice in 11 more languages, claim your public profile, and follow it all right here on the new changelog.

New

Bring Dometrain into your AI assistant

The Dometrain MCP integration is live. Connect your AI assistant or coding agent to Dometrain and it can search every lesson, read course code and transcripts, and explore the catalog for you, right from your editor. Set it up in minutes from your dashboard.

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New

Practice in 11 more languages

Hands-on exercises now run in 11 more languages, right in your browser with zero setup: Ruby, PHP, C, C++, Lua, Clojure, Perl, F#, OCaml, Zig, and R.

New

Your public learner profile

Every learner now has a public profile page. Show off your achievements, progress, and completed courses, and share it anywhere with a single link.

New

Learn the command line in your browser

New terminal-based lessons drop you into a safe, simulated terminal. Type real commands, work toward guided checkpoints, and build command-line confidence without touching your own machine.

New

Review code like a senior engineer

A new review lesson type puts you in the reviewer's chair: read a real set of code changes, leave line-by-line comments, and submit your review, just like on the job.

Improved

Course pages, redesigned

Course pages got a full redesign: clearer pricing, easier access to previews, and a smoother experience on mobile.

Improved

Your progress stays with you

If your subscription has expired, you can still see your course progress across the site, so you know exactly where to pick things back up.

New

The Dometrain changelog is live

Every week we will post what is new on Dometrain right here: new features, improvements, and fresh content. Check back any time to see what your learning platform can do for you now.

Find your next course, meet Dometrain Lite

A big week for choosing what to learn: a smarter way to discover courses, a new plan to get started with, and a fresh coat of paint across the site.

New

Dometrain Lite is here

A new, more affordable subscription tier that includes a curated set of courses. The plans page now compares exactly what each plan includes, so you can pick the one that fits how you learn.

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New

AI-powered course discovery

Not sure what to learn next? Tell the new search on the homepage or the course catalog what you want to achieve, and it will find, compare, and recommend the right courses for you.

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Improved

The AI assistant joins your system design exercises

Ask for help in a system design exercise and the AI assistant now works directly on your diagram: it can draw, connect, and explain architecture on the canvas with you.

Improved

A fresh look across the site

The homepage got a full redesign, and the course catalog, author, and workshop pages were refreshed to make browsing faster and clearer.

Improved

Mock interviews on any device

Mock interviews now look and work great on phones, tablets, and ultrawide monitors, so you can practice wherever you are.

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Improved

Spot downloadable resources at a glance

Lessons that include downloadable files are now marked in the course curriculum, so you can find resources without opening every lesson.

June 2026

Wishlists and team assignments

Two new ways to plan your learning: save courses for later, and see everything your team wants you to complete in one place.

New

Save courses to your wishlist

Found a course you want but are not ready to start? Add it to your new wishlist and come back any time. You can also opt in to alerts so you never miss a discount on a wishlisted course.

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New

See what your team assigned you

If your team assigns you courses or learning paths, they now show up in one dashboard view with due dates, progress for every course, and a clear next step.

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AI mock interviews are here

Practice the hardest part of getting a job: the interview itself. Plus a smarter video player and new achievements to chase.

New

Practice real interviews with an AI interviewer

Mock interviews are live. Talk through a realistic interview for your target role with an AI interviewer that adapts to your answers, then get a detailed report on how you did and where to improve.

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New

Live coding rounds in mock interviews

Interviews can now include a live coding round: solve a real problem in the built-in editor while the interviewer follows along and reacts, just like the real thing.

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Improved

The player remembers your settings

Captions and playback speed now stick across lessons and sessions, so you set them once and get back to learning.

Improved

New achievements, easier to browse

There are new achievements to earn, and the achievements page now has category tabs so you can see what you have unlocked and what is next.

Improved

Quiz retries keep your answers

Retrying a quiz no longer clears everything you entered, so you can focus on fixing just the answers you got wrong.

May 2026

System design goes hands-on

You can now design real architectures, not just watch someone else do it.

New

Interactive system design exercises

Hands-on lessons now include an interactive diagram canvas. Drag in real infrastructure building blocks, connect them into an architecture, and get instant feedback on your design. A built-in tutorial walks you through your first diagram.

Improved

Give your code the full screen

You can now minimize the test panel in hands-on coding exercises, so your editor gets all the room it needs while you work.

April 2026

Lock down your applications

A brand new course on one of the most requested topics.

Content

New course: Getting Started: Authentication and Authorization in .NET

Learn how to add authentication and authorization to your .NET applications with modern patterns and best practices.

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March 2026

Unlimited practice, generated for you

Never run out of things to practice, and get a better look at our workshops while you are at it.

New

Generate your own coding challenges with AI

Want more practice? Generate unlimited coding challenges with AI in C#, Python, TypeScript, and JavaScript, then solve them in your browser with instant test feedback.

Improved

Every workshop gets its own page

Each workshop now has a dedicated page with the full details, so you can see exactly what you will learn before you sign up.

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Java joins the browser

More languages, and a new home for training with us in person.

New

Practice Java right in your browser

Java exercises now compile and run entirely in your browser. Write real Java, run it, and get instant test feedback without installing a thing.

New

A new home for workshops

Browse all Dometrain workshops in one place and find your next chance to train with us, in person or online.

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February 2026

Get ahead on MCP

Content

New course: Getting Started: Model Context Protocol (MCP)

Learn what MCP is and how to integrate it into your applications, one of the most in-demand skills in AI development right now.

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Two new hands-on courses, more languages

The hands-on experience keeps growing: new interactive courses and new languages you can run without leaving your browser.

Content

Hands-On: Learn TypeScript and Hands-On: Learn JavaScript

Two new interactive courses where you learn by writing real code in your browser, with instant feedback on every exercise.

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New

Python and Go run in your browser

In-browser exercises now support Python and Go, joining C#, SQL, TypeScript, and JavaScript. No installs, no setup, instant feedback.

Sharpen your algorithms

Content

New course: Hands-On: Data Structures & Algorithms in C#

Master data structures and algorithms by solving interactive coding exercises in C#, right in your browser with instant feedback as you go.

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January 2026

Quizzes, and lessons that talk

New ways to check your understanding and new ways to take it all in.

New

Quizzes inside your courses

Courses can now include quiz lessons. Check your understanding as you go and see instantly which answers you got right.

New

Exercise instructions, read aloud

Hands-on exercises can now read their instructions out loud to you, with adjustable speed, so you can listen while you code.

Improved

One-click sign-in

You can now sign up and sign in with one click using your existing accounts. No new password to remember.

Learn by doing: hands-on courses are here

The biggest change to how you learn on Dometrain yet: courses where you write real code in your browser, plus XP, achievements, and a leaderboard to keep you going.

New

Write real code, right in your browser

Solve interactive coding exercises with instant test feedback and no setup at all, starting with the free Hands-On: C# for Beginners.

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Content

Hands-On: Learn PostgreSQL

Learn PostgreSQL by writing and running real queries in your browser, with interactive challenges designed for every level.

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New

Earn XP and level up

Completing lessons and exercises now earns you XP. Level up, build a daily streak, and follow it all on your new progression page.

New

Unlock achievements

Achievements are live. Collect them as you learn, from your first completed lesson to feats only the most dedicated will reach.

New

The leaderboard is live

See how you stack up against other learners, climb the ranks, and compete with the Dometrain community.

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Read it your way

Whether it is articles or lessons, the words are now right where you need them.

New

The blog moves in

Our articles now live right here on Dometrain with a fresh reading experience, and there is a feed you can subscribe to so you never miss a post.

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New

Lesson transcripts

Video lessons now include a full transcript, so you can read along, skim back, and find exactly where something was said.

What's New