13.4 Execution and core library
Navigate execution and core library in platform-spec and tie reading to crates.
Execution and core library
Execution and the core library answer different questions. Read Execution for runtime, ABI, and host behavior; read Core library for the library surface exposed to programs.
Choose the right domain
Section titled “Choose the right domain”| If you are asking about… | Start here |
|---|---|
| Host calls, runtime services, ABI boundaries, or conformance execution | Execution |
| Public library APIs, corelib organization, or compiler integration | Core library |
Cross-domain features may link to both hubs. Follow those links rather than assuming that an API name describes its owning contract.
Trace into code carefully
Section titled “Trace into code carefully”Once you have identified the feature, use its implementation anchors and tests as supporting evidence. The standard remains the authority for observable behavior; source layout is allowed to change.