Slate v2 Custom Types Recovery

Goal

Recover site/examples/ts/custom-types.d.ts toward the legacy same-path contract, repair any package typing drift that blocks that recovery, and only then clean up the example fallout caused by the restored declaration path.

Phases

• Read legacy/current custom-types files and same-path drift rules
• Restore site/examples/ts/custom-types.d.ts as the source file path
• Repoint example imports from ./custom-types to ./custom-types.d
• Repair slate-react EditableTextBlocks declaration drift where needed
• Finish the remaining example fallout from the restored declaration contract
• Re-run focused verification and record any honest remaining debt
• Restore the ambient declare module 'slate' block and fix the resulting example fallout

Findings

• The full legacy ambient declare module 'slate' block is not currently viable; that was true until the current-only example element shapes were added back to the same-path declaration file.
• The site reads packages/slate-react/dist/src/*.d.ts, so package type fixes are invisible to site/tsconfig.json until declaration output changes too.
• Node.isElement / Node.isText were typed too narrowly for the Editor.nodes(...) callback shape. That was package drift, not example drift.
• The current example corpus depends on additional element families not present in legacy custom-types.d.ts, including chip, quote, ordered-list, check-list, dynamic link:*, dynamic format:*, annotations, and table-cell metadata like cellId.

Progress

• Restored custom-types.d.ts
• Moved custom-types.d.ts back under site/examples/ts/
• Updated example imports to the same-path ./custom-types
• Patched EditableTextBlocks declaration output to carry the generic renderElement surface through the dist types the site consumes
• Restored check-lists.tsx to a stable source-close state under the recovered declaration path
• Reintroduced the ambient declare module 'slate' block
• Fixed the resulting example fallout in helpers and same-path examples
• Patched slate Node.isElement / Node.isText typing in source + dist
• Focused verification passed with site/tsconfig.json, package slate tsc, package slate-react tsc, and file-level Biome