migrate-v8-to-v9

# Svelte v8-to-v9 migration checklist Before starting, run `intent load @tanstack/table-core#migrate-v8-to-v9`. Audit its entire shared checklist and read the detailed core mappings for APIs present in the application. This checklist adds the Svelte-specific changes. Framework prerequisite: Svelte 5 (`svelte ^5.0.0`); migrate Svelte 3/4 components before Table. ## Adapter audit - [ ] Upgrade to Svelte 5 and replace old writable-store table setup with runes/getters. - [ ] Replace `createSvelteTable` with `createTable`; preserve changing data and controlled slices through getters. - [ ] Configure explicit features/row-model slots and complete the shared core checklist. - [ ] Remove creation selectors, selected `table.state`, `subscribeTable`, and `SubscribeSource` from earlier v9 code. - [ ] Update `SvelteTable` to two generic parameters and `AppSvelteTable` to five; remove selected-state generics from `useTableContext`. - [ ] Read atoms/store in templates or tracked runes. Use per-slice updater callbacks, `createTableState`, or external Svelte Store atoms instead of global `onStateChange`. - [ ] Render with `FlexRender`, `renderComponent`, or `renderSnippet`. Use the shipped rune-aware `createTableHook` only for repeated conventions. ## Load the affected details When the audit finds old Svelte construction, state, rendering, or app-hook code, read [adapter migration details](references/adapter-migration.md) before editing it. For a replacement render scaffold, read [getting started](../getting-started/SKILL.md). For controlled or stale state after migration, read [table state](../table-state/SKILL.md). Shared pinning, sizing, sorting, selection, prototype-method, type, and registry changes stay in the core migration references. Renaming `createSvelteTable` alone does not complete the migration. ## Verify the migration - [ ] Type-check against the installed v9 adapter and exercise every enabled client/manual feature flow. - [ ] Verify external state writes, reactive data replacement, and the framework rendering paths changed above. - [ ] Complete the core checklist, including layout and selection behavior when those features are used. - [ ] Replace temporary `stockFeatures` when the target is explicit feature tree-shaking. ## API discovery Inspect `node_modules/@tanstack/svelte-table/dist/index.d.ts` and the exported adapter declarations. Use `node_modules/@tanstack/table-core/dist/index.d.ts` for shared APIs.