Goal

Do one tiny non-React @platejs/toc pass around the only real seams in the package.

Scope

• getHeadingList
• insertToc
• isHeading
• BaseTocPlugin

Explicit Deferrals

• /react
• scroll observer hooks
• sidebar/controller logic

Verification Plan

• targeted bun test on touched toc specs
• bun test packages/toc/src
• pnpm test:profile -- --top 20 packages/toc/src
• pnpm test:slowest -- --top 20 packages/toc/src
• pnpm install
• pnpm turbo build --filter=./packages/toc
• pnpm turbo typecheck --filter=./packages/toc
• pnpm lint:fix

Result

• added focused toc specs for getHeadingList, insertToc, isHeading, and BaseTocPlugin
• verification passed:
  • targeted touched-file bun test
  • bun test packages/toc/src
  • pnpm test:profile -- --top 20 packages/toc/src
  • pnpm test:slowest -- --top 20 packages/toc/src
  • pnpm install
  • pnpm turbo build --filter=./packages/toc
  • pnpm turbo typecheck --filter=./packages/toc
  • pnpm lint:fix