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## Summary - The assistant's `create_notebook`/`update_notebook` tools run entirely server-side, so an open notebook tab's React Query cache and Valtio store never learn a write happened — the tab keeps showing stale content until a manual reload. - Adds `collectNotebookCacheEffects`/`applyNotebookCacheEffects` (`apps/studio/lib/ai/notebook-cache-invalidation.ts`), which scan finished assistant messages for completed `create_notebook`/`update_notebook` tool calls and evict the affected notebook via `evictNotebookFromCaches` (`apps/studio/data/content/notebooks/notebook-cache.ts`), plus invalidate the nav list. - Wired into `createChatInstance`'s `onFinish` in `state/ai-assistant-state.tsx`, with per-chat dedupe so replayed history isn't reprocessed. - Removes the cache entry outright rather than invalidating it, since a remounting `useNotebookQuery` would otherwise read the stale cached value synchronously before its refetch lands. - Explicitly skips eviction when the open tab has unsaved local edits, so an assistant write can't silently discard them. Related: [FE-4235](https://linear.app/supabase/issue/FE-4235) **Out of scope:** this only protects the client-side cache/store from being clobbered after the fact. Preventing the assistant's `update_notebook` tool call itself from overwriting a user's unsaved edits (a data-layer conflict, not a cache-freshness one) is tracked separately in [FE-4255](https://linear.app/supabase/issue/FE-4255). ## Test plan - [x] `pnpm test:studio -- notebook-cache notebook-cache-invalidation ai-assistant-state.notebook-cache-invalidation ExplorerNotebookTab.assistant-cache-invalidation ExplorerNotebookTabCoordinator` — all passing - [x] Reproduction-first component test (`ExplorerNotebookTab.assistant-cache-invalidation.test.tsx`) — verified it fails without the fix (stale content persists) and passes with it - [x] Regression test for the dirty-notebook guard (an edited, unsaved notebook is left untouched by an assistant write) - [x] `pnpm typecheck --filter=studio` / `pnpm lint --filter=studio` clean <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Bug Fixes** * Notebook changes made through the AI assistant now appear correctly in open notebook tabs and after reopening them. * Saved notebook caches are refreshed after completed create or update actions, preventing stale content from being displayed. * Unsaved notebook changes are preserved during cache cleanup. * Closing a notebook tab now consistently removes its cached content. * **Tests** * Added coverage for assistant-driven updates, remounts, duplicate actions, project context changes, and cache behavior. <!-- end of auto-generated comment: release notes by coderabbit.ai -->