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## I have read the [CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md) file. YES ## What kind of change does this PR introduce? Refactor, plus one bug fix. Groundwork for showing the user a preview of what they are approving when the AI Assistant creates or edits a notebook. No UI in this PR. Towards FE-4143 ## What is the current behavior? `applyNotebookOperations` resolves an ordered list of notebook operations into the resulting cells and nothing else. Rendering a diff for the approval gate needs to know *what happened* to each cell position, not just where things landed, so there is no way to build the preview on top of it. Separately, replacing a cell dropped its id, so `[replace cell-2, insert after cell-2]` failed with a spurious `unknown_cell_id`. ## What is the new behavior? `deriveNotebookDiff` resolves operations into one annotated entry per cell position (`unchanged`, `added`, `removed`, `replaced`, `moved`). `applyNotebookOperations` becomes a thin projection over its result, so there is a single interpreter of notebook operations and the diff a user approves cannot disagree with the cells that get written. The pre-existing tests pass untouched, which is the evidence that the projection is faithful. Notes on the annotations: - `removed` entries stay in the position the cell used to hold so the list reads as a diff. This does not perturb insert-anchor arithmetic: prior inserts still sit contiguously after their anchor. - Moves that cancel out are downgraded to `unchanged`, since two moves can anchor on each other and leave every cell where it started. Badging those as moved would make the preview lie. - `fromIndex` is the cell's position in the original notebook rather than in the shifted working order, so `was #3` means what a reader expects. A replaced cell now stays addressable as an anchor. Anchoring and targeting are separate lookups: a replaced cell can be anchored on, but is never a legitimate target. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Notebook changes now provide a structured view of added, removed, replaced, moved, and unchanged cells. * Replaced cells can be used as insertion anchors, while invalid or duplicate targets are rejected. * No-op moves are handled as unchanged cells. * Notebook edits preserve operation ordering and original cell positions for more predictable results. * **Bug Fixes** * Improved notebook operation handling and error reporting for complex cell edits. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
Supabase
Supabase is the Postgres development platform. We're building the features of Firebase using enterprise-grade open source tools.
- Hosted Postgres Database. Docs
- Authentication and Authorization. Docs
- Auto-generated APIs.
- Functions.
- File Storage. Docs
- AI + Vector/Embeddings Toolkit. Docs
- Dashboard
Watch "releases" of this repo to get notified of major updates.
Documentation
For full documentation, visit supabase.com/docs
To see how to Contribute, visit Getting Started
Community & Support
- Community Forum. Best for: help with building, discussion about database best practices.
- GitHub Issues. Best for: bugs and errors you encounter using Supabase.
- Email Support. Best for: problems with your database or infrastructure.
- Discord. Best for: sharing your applications and hanging out with the community.
How it works
Supabase is a combination of open source tools. We’re building the features of Firebase using enterprise-grade, open source products. If the tools and communities exist, with an MIT, Apache 2, or equivalent open license, we will use and support that tool. If the tool doesn't exist, we build and open source it ourselves. Supabase is not a 1-to-1 mapping of Firebase. Our aim is to give developers a Firebase-like developer experience using open source tools.
Architecture
Supabase is a hosted platform. You can sign up and start using Supabase without installing anything. You can also self-host and develop locally.
- Postgres is an object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
- Realtime is an Elixir server that allows you to listen to PostgreSQL inserts, updates, and deletes using websockets. Realtime polls Postgres' built-in replication functionality for database changes, converts changes to JSON, then broadcasts the JSON over websockets to authorized clients.
- PostgREST is a web server that turns your PostgreSQL database directly into a RESTful API.
- GoTrue is a JWT-based authentication API that simplifies user sign-ups, logins, and session management in your applications.
- Storage a RESTful API for managing files in S3, with Postgres handling permissions.
- pg_graphql a PostgreSQL extension that exposes a GraphQL API.
- postgres-meta is a RESTful API for managing your Postgres, allowing you to fetch tables, add roles, and run queries, etc.
- Envoy is a cloud-native, high-performance edge and service proxy.
Client libraries
Our approach for client libraries is modular. Each sub-library is a standalone implementation for a single external system. This is one of the ways we support existing tools.
| Language | Client | Feature-Clients (bundled in Supabase client) | ||||
|---|---|---|---|---|---|---|
| Supabase | PostgREST | GoTrue | Realtime | Storage | Functions | |
| ⚡️ Official ⚡️ | ||||||
| JavaScript (TypeScript) | supabase-js | postgrest-js | auth-js | realtime-js | storage-js | functions-js |
| Flutter | supabase-flutter | postgrest-dart | gotrue-dart | realtime-dart | storage-dart | functions-dart |
| Swift | supabase-swift | postgrest-swift | auth-swift | realtime-swift | storage-swift | functions-swift |
| Python | supabase-py | postgrest-py | gotrue-py | realtime-py | storage-py | functions-py |
| 💚 Community 💚 | ||||||
| C# | supabase-csharp | postgrest-csharp | gotrue-csharp | realtime-csharp | storage-csharp | functions-csharp |
| Go | - | postgrest-go | gotrue-go | - | storage-go | functions-go |
| Java | - | - | gotrue-java | - | storage-java | - |
| Kotlin | supabase-kt | postgrest-kt | auth-kt | realtime-kt | storage-kt | functions-kt |
| Ruby | supabase-rb | postgrest-rb | - | - | - | - |
| Rust | - | postgrest-rs | - | - | - | - |
| Godot Engine (GDScript) | supabase-gdscript | - | - | - | - | - |
Badges
[](https://supabase.com)
<a href="https://supabase.com">
<img
width="168"
height="30"
src="https://supabase.com/badge-made-with-supabase.svg"
alt="Made with Supabase"
/>
</a>
[](https://supabase.com)
<a href="https://supabase.com">
<img
width="168"
height="30"
src="https://supabase.com/badge-made-with-supabase-dark.svg"
alt="Made with Supabase"
/>
</a>
Translations
- Arabic | العربية
- Albanian / Shqip
- Bangla / বাংলা
- Bulgarian / Български
- Catalan / Català
- Croatian / Hrvatski
- Czech / čeština
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- English
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- Italiano / Italian
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- Norwegian (Bokmål) / Norsk (Bokmål)
- Persian / فارسی
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- Portuguese / Português
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- Romanian / Română
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- Spanish / Español
- Simplified Chinese / 简体中文
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- List of translations