Core Contract Lane

Goal

Complete ordered slice 1 only:

• deepen @platejs/core compile-only contract coverage
• add narrow runtime specs for parser pipes, chunking, and affinity selection
• keep /react out

Scope

• packages/core/type-tests/*
• packages/core/src/internal/plugin/*
• packages/core/src/lib/plugins/chunking/*
• packages/core/src/lib/plugins/affinity/transforms/*

Findings

• the current type lane covers only the simpler plugin and editor contracts
• there are no runtime specs for pipeTransformData, pipeTransformFragment, pipeInsertFragment, withChunking, or setAffinitySelection
• targeted verification should stay local: new core specs, pnpm test:types, and the touched core package build/typecheck/lint path
• pnpm test:types depends on built package exports, so the stable path is pnpm install -> pnpm turbo build --filter=./packages/core -> pnpm turbo typecheck --filter=./packages/core -> pnpm test:types
• inside plugin extension callbacks, cross-plugin typed access should go through editor.getApi(...) and editor.getPlugin(...); the eventual merged editor.api and editor.transforms surface is for the created editor, not for extension-time typing

Progress

• add focused type fixtures
• add focused runtime specs
• run targeted verification

Verification

• bun test packages/core/src/internal/plugin/pipeTransformData.spec.ts packages/core/src/internal/plugin/pipeTransformFragment.spec.ts packages/core/src/internal/plugin/pipeInsertFragment.spec.ts packages/core/src/lib/plugins/chunking/withChunking.spec.ts packages/core/src/lib/plugins/affinity/transforms/setAffinitySelection.spec.ts
• pnpm install
• pnpm turbo build --filter=./packages/core
• pnpm turbo typecheck --filter=./packages/core
• pnpm lint:fix
• pnpm test:types