WIT Support: Remaining work for pipeline integration

[DamianReeves]

Overview

This issue tracks the remaining work for complete WIT support in Morphir after the initial bindings module lands (#479).

Completed Work ✅

The following has been implemented in the feature/wit-support branch:

Beads ID	Description	Status
morphir-lex	Scaffold wasm-componentmodel Go module	✅ Closed
morphir-w34	Define WIT AST/domain model	✅ Closed
morphir-zvf	Add WIT bindings module with parser and package support	✅ Closed
morphir-mpr	Implement WIT package emitter	✅ Closed
morphir-rog	Add BDD fixtures/tests for WIT (WASI)	✅ Closed
morphir-4bi	Implement pure WIT parser	✅ Closed

What's Working

• WIT domain model (Package, Interface, World, TypeDef, Function, etc.)
• Parser adapter from bytecodealliance/wit to Morphir domain model
• Pure WIT parser with lexer, parser, and compatibility tests
• WIT text emitter from domain model
• Full type support: primitives, containers, records, variants, enums, flags, resources, handles
• BDD tests with WASI packages as fixtures

Remaining Work 🚧

1. Type Mapping Configuration System (P1) - IN PROGRESS

Beads ID: morphir-77u

Design and implement a shared type mapping configuration system for all Morphir bindings (WIT, Protocol Buffers, JSON Schema, etc.). This is a foundational design that should be completed before implementing specific binding type mappings.

Requirements:

• Define default type mappings in code
• Allow configuration-based overrides/extensions
• Support bidirectional mappings (external type ↔ Morphir IR)
• Integrate with pipeline configuration (ADR-0002)
• Be reusable across all binding implementations

2. WIT Pipeline Adapters (P2)

Beads ID: morphir-jed
Blocked by: morphir-77u

Add frontend/backend adapters that plug WIT parsing/emission into Morphir processing pipelines. This will enable:

• Using WIT as a Morphir frontend (parse WIT → Morphir IR)
• Using WIT as a Morphir backend (Morphir IR → emit WIT)

Epic Tracking

All WIT work is tracked under epic morphir-1kp: WIT support for wasm component model

Related Links

• PR feat(wit): add WIT bindings module with parser adapter and emitter #479: Initial WIT bindings module
• pkg/bindings/wit/ - WIT bindings module
• tests/bdd/features/wit/ - BDD feature files