## 1. The `twenty-client-sdk` Package (Source of Truth)
The monorepo package at `packages/twenty-client-sdk` ships with:
- A **pre-built metadata client** (static, generated from a fixed
schema)
- A **stub core client** that throws at runtime (`CoreApiClient was not
generated...`)
- Both ESM (`.mjs`) and CJS (`.cjs`) bundles in `dist/`
- A `package.json` with proper `exports` map for
`twenty-client-sdk/core`, `twenty-client-sdk/metadata`, and
`twenty-client-sdk/generate`
## 2. Generation & Upload (Server-Side, at Migration Time)
**When**: `WorkspaceMigrationRunnerService.run()` executes after a
metadata schema change.
**What happens in `SdkClientGenerationService.generateAndStore()`**:
1. Copies the stub `twenty-client-sdk` package from the server's assets
(resolved via `SDK_CLIENT_PACKAGE_DIRNAME` — from
`dist/assets/twenty-client-sdk/` in production, or from `node_modules`
in dev)
2. Filters out `node_modules/` and `src/` during copy — only
`package.json` + `dist/` are kept (like an npm publish)
3. Calls `replaceCoreClient()` which uses `@genql/cli` to introspect the
**application-scoped** GraphQL schema and generates a real
`CoreApiClient`, then compiles it to ESM+CJS and overwrites
`dist/core.mjs` and `dist/core.cjs`
4. Archives the **entire package** (with `package.json` + `dist/`) into
`twenty-client-sdk.zip`
5. Uploads the single archive to S3 under
`FileFolder.GeneratedSdkClient`
6. Sets `isSdkLayerStale = true` on the `ApplicationEntity` in the
database
## 3. Invalidation Signal
The `isSdkLayerStale` boolean column on `ApplicationEntity` is the
invalidation mechanism:
- **Set to `true`** by `generateAndStore()` after uploading a new client
archive
- **Checked** by both logic function drivers before execution — if
`true`, they rebuild their local layer
- **Set back to `false`** by `markSdkLayerFresh()` after the driver has
successfully consumed the new archive
Default is `false` so existing applications without a generated client
aren't affected.
## 4a. Logic Functions — Local Driver
**`ensureSdkLayer()`** is called before every execution:
1. Checks if the local SDK layer directory exists AND `isSdkLayerStale`
is `false` → early return
2. Otherwise, cleans the local layer directory
3. Calls `downloadAndExtractToPackage()` which streams the zip from S3
directly to disk and extracts the full package into
`<tmpdir>/sdk/<workspaceId>-<appId>/node_modules/twenty-client-sdk/`
4. Calls `markSdkLayerFresh()` to set `isSdkLayerStale = false`
**At execution time**, `assembleNodeModules()` symlinks everything from
the deps layer's `node_modules/` **except** `twenty-client-sdk`, which
is symlinked from the SDK layer instead. This ensures the logic
function's `import ... from 'twenty-client-sdk/core'` resolves to the
generated client.
## 4b. Logic Functions — Lambda Driver
**`ensureSdkLayer()`** is called during `build()`:
1. Checks if `isSdkLayerStale` is `false` and an existing Lambda layer
ARN exists → early return
2. Otherwise, deletes all existing layer versions for this SDK layer
name
3. Calls `downloadArchiveBuffer()` to get the raw zip from S3 (no disk
extraction)
4. Calls `reprefixZipEntries()` which streams the zip entries into a
**new zip** with the path prefix
`nodejs/node_modules/twenty-client-sdk/` — this is the Lambda layer
convention path. All done in memory, no disk round-trip
5. Publishes the re-prefixed zip as a new Lambda layer via
`publishLayer()`
6. Calls `markSdkLayerFresh()`
**At function creation**, the Lambda is created with **two layers**:
`[depsLayerArn, sdkLayerArn]`. The SDK layer is listed last so it
overwrites the stub `twenty-client-sdk` from the deps layer (later
layers take precedence in Lambda's `/opt` merge).
## 5. Front Components
Front components are built by `app:build` with `twenty-client-sdk/core`
and `twenty-client-sdk/metadata` as **esbuild externals**. The stored
`.mjs` in S3 has unresolved bare import specifiers like `import {
CoreApiClient } from 'twenty-client-sdk/core'`.
SDK import resolution is split between the **frontend host** (fetching &
caching SDK modules) and the **Web Worker** (rewriting imports):
**Server endpoints**:
- `GET /rest/front-components/:id` —
`FrontComponentService.getBuiltComponentStream()` returns the **raw
`.mjs`** directly from file storage. No bundling, no SDK injection.
- `GET /rest/sdk-client/:applicationId/:moduleName` —
`SdkClientController` reads a single file (e.g. `dist/core.mjs`) from
the generated SDK archive via
`SdkClientGenerationService.readFileFromArchive()` and serves it as
JavaScript.
**Frontend host** (`FrontComponentRenderer` in `twenty-front`):
1. Queries `FindOneFrontComponent` which returns `applicationId`,
`builtComponentChecksum`, `usesSdkClient`, and `applicationTokenPair`
2. If `usesSdkClient` is `true`, renders
`FrontComponentRendererWithSdkClient` which calls the
`useApplicationSdkClient` hook
3. `useApplicationSdkClient({ applicationId, accessToken })` checks the
Jotai atom family cache for existing blob URLs. On cache miss, fetches
both SDK modules from `GET /rest/sdk-client/:applicationId/core` and
`/metadata`, creates **blob URLs** for each, and stores them in the atom
family
4. Once the blob URLs are cached, passes them as `sdkClientUrls`
(already blob URLs, not server URLs) to `SharedFrontComponentRenderer` →
`FrontComponentWorkerEffect` → worker's `render()` call via
`HostToWorkerRenderContext`
**Worker** (`remote-worker.ts` in `twenty-sdk`):
1. Fetches the raw component `.mjs` source as text
2. If `sdkClientUrls` are provided and the source contains SDK import
specifiers (`twenty-client-sdk/core`, `twenty-client-sdk/metadata`),
**rewrites** the bare specifiers to the blob URLs received from the host
(e.g. `'twenty-client-sdk/core'` → `'blob:...'`)
3. Creates a blob URL for the rewritten source and `import()`s it
4. Revokes only the component blob URL after the module is loaded — the
SDK blob URLs are owned and managed by the host's Jotai cache
This approach eliminates server-side esbuild bundling on every request,
caches SDK modules per application in the frontend, and keeps the
worker's job to a simple string rewrite.
## Summary Diagram
```
app:build (SDK)
└─ twenty-client-sdk stub (metadata=real, core=stub)
│
▼
WorkspaceMigrationRunnerService.run()
└─ SdkClientGenerationService.generateAndStore()
├─ Copy stub package (package.json + dist/)
├─ replaceCoreClient() → regenerate core.mjs/core.cjs
├─ Zip entire package → upload to S3
└─ Set isSdkLayerStale = true
│
┌────────┴────────────────────┐
▼ ▼
Logic Functions Front Components
│ │
├─ Local Driver ├─ GET /rest/sdk-client/:appId/core
│ └─ downloadAndExtract │ → core.mjs from archive
│ → symlink into │
│ node_modules ├─ Host (useApplicationSdkClient)
│ │ ├─ Fetch SDK modules
└─ Lambda Driver │ ├─ Create blob URLs
└─ downloadArchiveBuffer │ └─ Cache in Jotai atom family
→ reprefixZipEntries │
→ publish as Lambda ├─ GET /rest/front-components/:id
layer │ → raw .mjs (no bundling)
│
└─ Worker (browser)
├─ Fetch component .mjs
├─ Rewrite imports → blob URLs
└─ import() rewritten source
```
## Next PR
- Estimate perf improvement by implementing a redis caching for front
component client storage ( we don't even cache front comp initially )
- Implem frontent blob invalidation sse event from server
---------
Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>
## Description
- Adds support for declaring command menu items directly within
`defineFrontComponent` via an optional command config property
- Introduces a new `CommandMenuItemManifest` type in twenty-shared and
wires it through the manifest build pipeline
## Example Of usage
```tsx
import { defineFrontComponent } from "twenty-sdk";
const TestAction = () => {
return <div>Test Action</div>;
};
export default defineFrontComponent({
universalIdentifier: "6c289461-0007-4a62-a99f-69e5c11a4ce7",
name: "test-action",
description: "Test Action",
component: TestAction,
command: {
universalIdentifier: "c07df864-495f-46f3-9f5b-9d3ce2589e9b",
label: "Run My Action",
icon: "IconBolt",
isPinned: false,
},
});
```
## Video QA
https://github.com/user-attachments/assets/f910fc6a-44a9-45d1-87c5-f0ce64bb3878
## Sync page layouts, tabs, and widgets
Adds the ability for SDK applications to synchronize `pageLayout`,
`pageLayoutTab`, and `pageLayoutWidget` entities, following the same
pattern established in #18003 for views and navigation menu items.
### Changes
**`twenty-shared`**
- New `PageLayoutManifest`, `PageLayoutTabManifest`, and
`PageLayoutWidgetManifest` types with a hierarchical structure (page
layout → tabs → widgets)
- Added `pageLayouts: PageLayoutManifest[]` to the `Manifest` type
**`twenty-sdk`**
- New `definePageLayout()` SDK function with validation for
universalIdentifier, name, and nested tabs/widgets
- Wired into the manifest extraction and build pipeline
(`DefinePageLayout` target function, `PageLayouts` entity key)
- Exported from the SDK entry point
**`twenty-server`**
- Added `pageLayout`, `pageLayoutTab`, `pageLayoutWidget` to
`APPLICATION_MANIFEST_METADATA_NAMES`
- New conversion utilities: manifest → universal flat entity for all
three entity types
- Updated `computeApplicationManifestAllUniversalFlatEntity
https://github.com/user-attachments/assets/c4e63edb-6e98-44bc-841f-ee110ae712d4
How it works
- `manifest.json` files are now committed when apps are published to our
repo
- to display available apps, from the server, we read into our github
repo, using a pod-scoped cache
- feature flagged
- app installation will be behind permission gate MARKETPLACE_APPS
Limitations and what is yet to develop
- content and settings tabs
- installed apps tab
- app installation
- test and potentially fix reading from .manifest.json once [Reshape
manifest
structure](https://github.com/twentyhq/core-team-issues/issues/2183) is
done. additional work is expected on assets notably. (couldnt properly
do it here as manifest.json will only be committed after this pr)
- we only read in community/ folder for now - we may want tochange that
- the cache is rather artisanal for now and scoped by pod - we may want
to change that
## Add `frontComponent` entity type to SDK
This PR adds a new `frontComponent` entity type at parity with
`serverlessFunction`. Front components are React components that can be
defined and bundled as part of Twenty applications.
### Changes
#### New Entity Type
- Added `FRONT_COMPONENT` to `SyncableEntity` enum
- Front components use `*.front-component.tsx` file naming convention
- CLI command `twenty app:add` now includes `front-component` as an
option
#### SDK Application Layer (`twenty-sdk`)
- Added `defineFrontComponent()` function for defining front component
configurations with validation
- Added `FrontComponentConfig` type for component configuration
- Added `getFrontComponentBaseFile()` template generator for scaffolding
new front components
- Added `loadFrontComponentModule()` to load front component modules and
extract component metadata
#### Shared Types (`twenty-shared`)
- Added `FrontComponentManifest` type with `universalIdentifier`,
`name`, `description`, `componentPath`, and `componentName` fields
- Updated `ApplicationManifest` to include optional `frontComponents`
array
#### Manifest Build System
- Updated `manifest-build.ts` to discover and load
`*.front-component.tsx` files
- Updated `manifest-validate.ts` to validate front components and check
for duplicate IDs
- Updated `manifest-display.ts` to display front component count in
build summary
- Updated `manifest-plugin.ts` to display front component entry points
and watch `.tsx` files
#### Template (`create-twenty-app`)
- New applications now include a sample
`hello-world.front-component.tsx` file
#### Tests
- Added unit tests for `defineFrontComponent()`
- Added unit tests for `getFrontComponentBaseFile()`
## Summary
This PR enables serverless functions to be exposed as AI tools, allowing
them to be used by AI agents.
### Changes
- Added new `SERVERLESS_FUNCTION` tool category
- Added `toolDescription`, `toolInputSchema`, and `toolOutputSchema`
fields to serverless functions
- Created database migration for the new schema columns
- Added tool index query and resolver for fetching available tools
- Added Settings AI page tabs (Skills, Tools, Settings) with new tools
table
- Added utility to convert tool schema to JSON schema format
- Updated frontend to display tools in the settings page
### Implementation Details
- Serverless functions can now define tool metadata (description,
input/output schemas)
- These functions are automatically registered in the tool registry
- The tool index endpoint allows querying available tools with their
schemas
- Settings page now has a dedicated Tools tab showing all available
tools
- moves applicationRoleId to application entity
- add new `APPLICATION` FieldActorSource and `APPLICATION`
JwtTokenTypeEnum value
- create a new token with applicationId when executing a function
- when applicationId is in token, check for application.defaultRole
permissions
-use twenty-shared types in `twenty-sdk/application`
- create a new import from generate called "Twenty" that you can use
directly without having to set TWENTY_API_KEY AND TWENTY_API_URL (keep
metadata or core parameter only)
- provide to serverless unique one time BEARER TOKEN to run it
Result
<img width="977" height="566" alt="image"
src="https://github.com/user-attachments/assets/e78428a0-5b13-4975-aa13-58ee3b32450c"
/>
<img width="910" height="596" alt="image"
src="https://github.com/user-attachments/assets/6ec72bf5-7655-4093-a45e-ad269595a324"
/>
<img width="741" height="568" alt="image"
src="https://github.com/user-attachments/assets/7683944c-fd79-4417-8fb2-8e4815cc112f"
/>
First PR to implement application tokens
- add new application role in twenty-server
- move duplicated constants and types to twenty-shared
- will add role configuration utils into twenty-sdk in another PR
Paul Rastoin