## Summary
Logic-function bundles produced by the twenty-sdk CLI were ~1.18 MB even
for a one-line handler. Root cause: the SDK shipped as a single bundled
barrel (`twenty-sdk` → `dist/index.mjs`) that co-mingled server-side
definition factories with the front-component runtime, validation (zod),
and React. With no `\"sideEffects\"` declaration on the SDK package,
esbuild had to assume every module-level statement could have side
effects and refused to drop unused code.
This PR restructures the SDK so consumers' bundlers can tree-shake at
the leaf level:
- **Reorganized SDK source.** All server-side definition factories now
live under `src/sdk/define/` (agents, application, fields,
logic-functions, objects, page-layouts, roles, skills, views,
navigation-menu-items, etc.). All front-component runtime
(components, hooks, host APIs, command primitives) lives under
`src/sdk/front-component/`. The legacy bare `src/sdk/index.ts` is
removed; the bare `twenty-sdk` entry no longer exists.
- **Split the build configs by purpose / runtime env.** Replaced
`vite.config.sdk.ts` with two purpose-specific configs:
- `vite.config.define.ts` — node target, externals from package
`dependencies`, emits to `dist/define/**`
- `vite.config.front-component.ts` — browser/React target, emits to
`dist/front-component/**`
Both use `preserveModules: true` so each leaf ships as its own `.mjs`.
- **\`\"sideEffects\": false\`** on `twenty-sdk` so esbuild can drop
unreferenced re-exports.
- **\`package.json\` exports + \`typesVersions\`** updated: dropped the
bare \`.\` entry, added \`./front-component\`, and pointed \`./define\`
at the new per-module dist layout.
- **Migrated every internal/example/community app** to the new subpath
imports (`twenty-sdk/define`, `twenty-sdk/front-component`,
`twenty-sdk/ui`).
- **Added \`bundle-investigation\` internal app** that reproduces the
bundle bloat and demonstrates the fix.
- Cleaned up dead \`twenty-sdk/dist/sdk/...\` references in the
front-component story builder, the call-recording app, and the SDK
tsconfig.
## Bundle size impact
Measured with esbuild using the same options as the SDK CLI
(\`packages/twenty-apps/internal/bundle-investigation\`):
| Variant | Imports | Before | After |
| ----------------------- |
------------------------------------------------------- | ---------- |
--------- |
| \`01-bare\` | \`defineLogicFunction\` from \`twenty-sdk/define\` |
1177 KB | **1.6 KB** |
| \`02-with-sdk-client\` | + \`CoreApiClient\` from
\`twenty-client-sdk/core\` | 1177 KB | **1.9 KB** |
| \`03-fetch-issues\` | + GitHub GraphQL fetch + JWT signing + 2
mutations | 1181 KB | **5.8 KB** |
| \`05-via-define-subpath\` | same as \`01\`, via the public subpath |
1177 KB | **1.7 KB** |
That's a ~735× reduction on the bare baseline. Knock-on benefits for
Lambda warm + cold starts, S3 upload size, and \`/tmp\` disk usage in
warm containers.
## Test plan
- [x] \`npx nx run twenty-sdk:build\` succeeds
- [x] \`npx nx run twenty-sdk:typecheck\` passes
- [x] \`npx nx run twenty-sdk:test:unit\` passes (31 files / 257 tests)
- [x] \`npx nx run-many -t typecheck
--projects=twenty-front,twenty-server,twenty-front-component-renderer,twenty-sdk,twenty-shared,bundle-investigation\`
passes
- [x] \`node
packages/twenty-apps/internal/bundle-investigation/scripts/build-variants.mjs\`
produces the sizes above
- [ ] CI green
Made with [Cursor](https://cursor.com)
## Add API client generation to SDK dev mode and refactor orchestrator
into step-based pipeline
### Why
The SDK dev mode lacked typed API client generation, forcing developers
to work without auto-generated GraphQL types when building applications.
Additionally, the orchestrator was a monolithic class that mixed watcher
management, token handling, and sync logic — making it difficult to
extend with new steps like client generation.
### How
- **Refactored the orchestrator** into a step-based pipeline with
dedicated classes: `CheckServer`, `EnsureValidTokens`,
`ResolveApplication`, `BuildManifest`, `UploadFiles`,
`GenerateApiClient`, `SyncApplication`, and `StartWatchers`. Each step
has typed input/output/status, managed by a new `OrchestratorState`
class.
- **Added `GenerateApiClientOrchestratorStep`** that detects
object/field schema changes and regenerates a typed GraphQL client (via
`@genql/cli`) into `node_modules/twenty-sdk/generated` for seamless
imports.
- **Replaced `checkApplicationExist`** with `findOneApplication` on both
server resolver and SDK API service, returning the entity data instead
of a boolean.
- **Added application token pair mutations**
(`generateApplicationToken`, `renewApplicationToken`) to the API
service, with the server now returning `ApplicationTokenPairDTO`
containing both access and refresh tokens.
- **Restructured the dev UI** into `dev/ui/components/` with dedicated
panel, section, and event log components.
- **Simplified `AppDevCommand`** from ~180 lines of watcher management
down to ~40 lines that delegate entirely to the orchestrator.
Fixes https://github.com/twentyhq/core-team-issues/issues/1956
**Problem**
Within an app, the `.yarn/releases/` folder contains executable Yarn
binaries that run when executing any yarn command (`.yarnrc` file
indicates yarn path to be `.yarn/releases/yarn-4.9.2.cjs `.)
This is a supply chain attack vector: a malicious actor could submit a
PR with a compromised `yarn-4.9.2.cjs binary`, which would execute
arbitrary code on developers' machines or CI systems.
**Fix**
Actually, thanks to Corepack, we don't need to store and execute this
binary.
Corepack can be seen as the manager of a package manager: in
`package.json` we indicate a packageManager version like
`"packageManager": "yarn@4.9.2"`, and when executing `yarn` Corepack
will securely fetch the verified version from npm, avoiding the risk of
executing a compromised binary committed to the repository. This was
already in our app's package.json template but we were not using it!
We can now
- remove the folder containing the binary from our app template
base-application (that is scaffolded when creating an app through cli),
`.yarn/releases/`, and remove `yarnPath: .yarn/releases/yarn-4.9.2.cjs`
from its .yarnrc
- remove them from the community apps that were already published in the
repo
- add .yarn to gitignore
**Tested**
This has been tested and works for app created in the repo, outside the
repo, and existing apps in the repo
Charles Bochet