See the boundary
Follow one function from its signature to a refused effect and the smallest repair that makes its authority explicit.
Read one clauseLearn Deed
Start with the shortest route that answers your question. The browser paths need no setup; the written guides follow Deed 0.2.13.
Choose a starting point
From one clause to a working program.
Ask the compiler
Edit released examples, check them, run their tests, format them, and inspect the compiler's own diagnostics in your tab.
Open the playgroundWrite a program
Work through values, functions, effects, contracts, tests, modules, and the command-line workflow in order.
Follow the tutorialLearn by subject
Read only as far as the job requires.
The language
Syntax Functions, values, records, variants, matching, and modules. Effects and capabilities Declare authority, pass capability values, and handle effects. Standard library The modules and operations shipped with this release.Daily work
Check a project Check one file or resolve a set of imported modules. Write and run tests Use examples, contracts, generated properties, and refusals. Format code Preview a change, format a file, or check formatting in CI.Integrations
Editors Connect the language server and debugger to VS Code. MCP for agents Expose check, test, run, format, fix, explain, and review. Embed a program Compile a component and call it from a host.When something refuses
Start with the diagnostic, not a guess.
The diagnostic index is generated from the pinned compiler, and every entry links to its explanation. For a concrete shape to adapt, browse the released examples. For a design decision and its tradeoffs, read the design record.