migrate-v8-to-v9

Load `intent load @tanstack/table-core#migrate-v8-to-v9` first and audit its entire shared checklist. It owns feature registration, row-model slots, state/reset changes, prototype methods, logical pinning, sizing/resizing, sorting, selection, helpers, and TypeScript mappings. ## Framework prerequisites Lit 3.1.3 or newer within v3 (`lit ^3.1.3`) and `@lit/context ^1.1.0` are required. ## Lit migration checklist - [ ] Construct one `TableController<typeof features, TData>(this)` as a stable host field. - [ ] Replace the v8 `controller.table` property/options thunk with `controller.table(options, selector?)` during render. - [ ] Read selected `table.state` for rendering; use atom snapshots in handlers or stable `table.subscribe` selectors for template regions. - [ ] Feed resolved controlled callbacks back through reactive Lit properties, or use stable external atoms. - [ ] Switch render helpers to `FlexRender({ cell })`, `FlexRender({ header })`, or `FlexRender({ footer })` and preserve instance-method receivers. - [ ] If app conventions repeat, construct a host-bound `useAppTable` once and call its `.table()` during render. ## Apply the affected mappings Read [adapter-migration](references/adapter-migration.md) when changing construction, rendering, state, or app hooks. Read the relevant core migration references for each affected shared API; this adapter checklist does not replace that audit. For complete v9 construction examples, read [getting-started](../getting-started/SKILL.md). For reactive state repairs, read [table-state](../table-state/SKILL.md). ## Final checks - [ ] All shared core migration checks and affected mappings have been applied. - [ ] The framework checklist above passes with the current adapter declarations. - [ ] Model inputs remain stable and state changes reach their reactive owner. ## API discovery Inspect `node_modules/@tanstack/lit-table/dist/index.d.ts`, then `TableController.d.ts`, `flexRender.d.ts`, or the relevant exported declaration. Core feature APIs are in `node_modules/@tanstack/table-core/dist/features/`.