This isn't like traditional programming tutorials. Instead of static examples, you're looking at living documentation — every page is backed by a real test that actually runs.

When you see a ✓, that means the code actually compiles and runs correctly. When you see ✗, you're looking at something we're still working on. This is documentation that can never drift from reality because it IS reality.

That said, tests can go cold. A ✓ means the test passed when last run — not that every example is perfectly idiomatic or complete. Koru is under active development.