Docs
Sites and templates
Where Bitling can pick up a problem, and the kinds of project it can write for you.
Practice sites
Bitling reads public practice pages. Open the popup on any other page and it says there's nothing to hatch there. It never captures proctored or employer assessment pages; it stops and tells you so.
| Site | Status | What Bitling picks up |
|---|---|---|
| LeetCode | Supported | Problem pages: statement, examples, constraints, tags, difficulty, and starter code for each language, including the editor language you last picked there. |
| HackerRank | Supported | Public and community challenges: statement, constraints, sample input and output, and the function stub. |
| Codility | Supported | Public Developer Training lessons and tasks only. Hiring tests are refused. |
| Coderbyte | Supported | Traditional coding challenges. |
| Codewars | Early | Kata description and train pages: rank, tags, description, and the language you're viewing. On a train page, Bitling also reads what the Solution and Sample Tests editors show, which may include your own edits or saved solution: an empty starter becomes the stub, anything with code in it stays a comment, and the sample tests are saved as a commented reference file that never runs. Nothing leaves your computer. |
| Exercism | Early | Public exercise overview pages. Exercism keeps stubs and tests behind sign-in and its CLI. If you already downloaded a Python or Go exercise with the exercism download command and create the project through the Bitling app with the Python / pytest or Go / go test template, its stub and tests are copied, read-only, from your Exercism workspace; Bitling never runs the CLI. Otherwise the project has a test file with a placeholder test but no example assertions; add your own. |
| CodeSignal | Planned | Not captured yet. The extension already has access so it can say so on the page. |
Early sites work but are still being polished. Bitling isn't affiliated with any of these sites.
Project templates
A template is one language plus its build tool and test framework. Pick one in the popup's Language list before you create a project, and Bitling remembers your pick for each site. Kotlin is the default. Your pick for a site always comes first. Until you've made one there, and with the desktop app, the popup starts from the language the site's editor is set to (when Bitling has a template for it), using the default template for that language from the app's Settings.
| Template | Your code and tests | Run tests with |
|---|---|---|
Kotlin / Gradle / JUnit 5 kotlin-gradle-junit | src/main/kotlin/Solution.kt src/test/kotlin/SolutionTest.kt | gradle test Needs: A JDK and Gradle |
Python / pytest python-pytest | solution.py test_solution.py | python -m pytest Needs: Python with pytest installed |
Java / Gradle / JUnit 5 java-gradle-junit | src/main/java/Solution.java src/test/java/SolutionTest.java | gradle test Needs: A JDK and Gradle |
Rust / Cargo rust-cargo | src/lib.rs tests/solution.rs | cargo test Needs: A Rust toolchain (cargo) |
Go / go test go-standard | solution.go solution_test.go | go test ./... Needs: Go 1.21 or newer |
TypeScript / Vitest typescript-node-vitest | src/solution.ts test/solution.test.ts | npm install, then npm test Needs: Node.js and npm |
JavaScript / Vitest javascript-node-vitest | src/solution.js test/solution.test.js | npm install, then npm test Needs: Node.js and npm |
Every project also gets a README.md with run instructions, problem.html (a clean offline copy of
the problem), and a .practice/ folder. Build files such as build.gradle.kts,
Cargo.toml, go.mod, or package.json are yours to edit. See
Refresh and your files for who owns what.
Browsers and operating systems
- The extension is built for Chrome. On its own, it writes projects with Chrome's folder access, so it needs a browser that supports choosing a folder for a site or extension to edit.
- The desktop app is for macOS 10.15 or later (Apple silicon Macs only for now), Windows, and Linux. It registers itself with Chrome, Chromium, Microsoft Edge, and Brave.
- It can open projects in editors it finds on your computer, such as IntelliJ IDEA, Android Studio, VS Code, and Cursor, as well as your terminal and file manager.