Goal

Move /Users/zbeyens/git/slate-v2/packages/slate/test/interfaces/Editor/above off the Mocha fixture harness onto the root Bun test graph as one bounded slice.

Constraints

• keep the single root bunfig.toml
• do not broaden the slice past Editor/above
• do not fake skips or leave the Mocha lane double-owning the same fixtures
• keep the remaining packages/slate/test/index.js Mocha harness intact

Findings

• the above/*.tsx fixtures import jsx from packages/slate/test/index.js
• packages/slate/test/index.js also bootstraps the whole Mocha fixture suite
• a Bun spec cannot safely import those fixtures until jsx is split out
• the slate Mocha loader lives in /Users/zbeyens/git/slate-v2/support/fixtures.js and is shared with slate-history
• the clean bounded migration path is:
  • keep the legacy Mocha-only custom JSX export in test/index.js
  • use stock slate-hyperscript JSX in the migrated Bun fixtures
  • split withTest
  • add one Bun spec for Editor/above
  • teach the shared fixture loader to ignore one directory
• the scoped Bun preload bridge is still required for Editor/above/*.tsx
• the Bun spec must not live under the legacy test/**/*.ts Mocha glob
• the migrated above fixtures are now bare TSX with no per-file pragma or stock jsx import

Plan

1. Split packages/slate/test/index.js helpers so Bun can import above fixtures without re-entering the Mocha harness
2. Add a Bun spec for packages/slate/test/interfaces/Editor/above
3. Exclude Editor/above from the shared Mocha fixture recursion
4. Wire the new spec into the root test:bun graph
5. Verify targeted Bun execution, package build/typecheck, and repo lint/test flow

Verification

• bun test ./packages/slate/test/bun/editor-above.spec.tsx
• pnpm install
• pnpm turbo build --filter=./packages/slate
• pnpm turbo typecheck --filter=./packages/slate
• pnpm exec tsc --project config/tsconfig.test.json --noEmit
• pnpm lint:fix
• pnpm test:bun
• pnpm test:mocha