Module completion 

Completion-data generation from the method catalog (§19.8).

The §19.8 acceptance criterion requires that “method completion data is generated from the same catalog used by the compiler.” This module renders the MethodCatalog into a serializable completion table for completion and signature help (§5.7: “The language server uses the same table”). No LSP wiring here — just the generation, plus a round-trip test proving the generated data covers the compiler’s catalog 1:1.

Structs

CompletionItem

One completion item: the receiver shape, method name, parameter shapes, result shape, and doc — everything the LSP needs to offer a completion.

Functions

completion_data

Generate the full completion table from the catalog, in catalog order. Every entry becomes one CompletionItem; the output is a 1:1 rendering.