Language reference

Language reference

This section renders the canonical Protos language specification from the exact immutable Protos revision consumed by this website.

The website does not become a second specification authority. Each generated page identifies its canonical source and revision, and the source document’s own normative, informative, draft, or compatibility status continues to apply.

Entry points

• Core Language Specification v0.1 — compatibility/navigation surface for Core v0.1.
• Grammar — lexical rules, syntax, and mandatory lowering.

Semantic specifications

• Object model
• Callables
• Execution and control
• Values and collections
• Modules
• Errors

Concurrency

• Futures and tasks
• Parallel execution
• Actors
• Distributed runtime

I/O and authority

• I/O core
• Process I/O
• Byte I/O
• Text I/O
• Filesystem
• Network

Runtime model

• Abstract runtime — informative execution model; it does not independently redefine observable language behavior.

The canonical specification changelog remains available in the source repository as historical material; it is intentionally not rendered as a primary reference page. Contributor/agent instructions under spec/AGENTS.md are likewise not language-reference content.

For a progressive explanation instead of normative reference material, use the Programming Guide.