## Summary
### Why
1. Sending the code to the lambda (~1Mb usually) is heavy on network and
results to a constant traffic of ~30Mb/s on AWS which results into TB of
network data every month
2. eval(1MB of code) is not that fast, it's heavy on memory and CPU on
lambda side
### High level
Adds two execution modes for logic functions, gated behind the new
`IS_LOGIC_FUNCTION_PREBUILT_MODE_ENABLED` workspace feature flag (off
everywhere by default):
- **LIVE** (current behavior, preserved bit-for-bit): the compiled
bundle is read from object storage and shipped in every Lambda invoke
payload. Used for fast iteration in the workflow editor / Settings test
runs.
- **PREBUILT** (new): the bundle is installed onto the per-function
Lambda alongside the unified executor, and invocations carry only `{
params, env, handlerName }` — saving JSON payload egress and warm-start
`import()` cost on every call.
### Key design choices
- **Unified Lambda handler** (`constants/executor/index.mjs`) dispatches
at runtime: `event.code` present ? LIVE (write to `/tmp`, dynamic
import) : `import('./prebuilt-logic-function.mjs')`. Both code paths
always coexist on the deployment package, so the same Lambda can serve
either mode without redeploying.
- **Install runs inside the `validateBuildAndRun` migration pipeline**,
not at execute time. `Create/UpdateLogicFunctionActionHandlerService`
calls `driver.installPrebuiltBundle` when `executionMode` flips
LIVE?PREBUILT or `checksum` changes while PREBUILT, gated on
`isBuildUpToDate=true` and a fresh checksum.
- **Strict execute, no reconciliation**:
`LogicFunctionExecutorService.execute` resolves `effectiveExecutionMode`
(caller override > feature flag > entity column). For PREBUILT it asks
the driver `getInstalledBundleChecksum` (Lambda `twenty:bundle-checksum`
tag for AWS, sidecar file locally) and throws
`LOGIC_FUNCTION_PREBUILT_BUNDLE_NOT_INSTALLED` on mismatch.
- **Feature flag gates every side effect**: with the flag off the
executor forces LIVE, the action-handler install hooks bail before AWS,
and workflow activation does not flip the mode. Rollback is just turning
the flag off.
### Lifecycle
- New workflow CODE step ? `LIVE`, no install.
- Workflow activated ? build + activation flips `executionMode=PREBUILT`
? action-handler installs the bundle + sets the Lambda tag.
- Draft from active version ? duplicated logic function reset to `LIVE`.
- App install ? manifest converter sets `PREBUILT`, create-action
handler installs.
- Test runs (`executeOneFromSource`, workflow editor) pass
`executionMode=LIVE` explicitly.
### Observability
`[lambda-timing]` log lines now include `effectiveExecutionMode` and
`payloadBytes`; the action handler logs `install_duration_ms` for each
install.
## Test plan
- [x] `npx nx typecheck twenty-server` ? passes
- [x] `npx oxlint --type-aware` on all changed files ? 0 warnings, 0
errors
- [x] `npx nx test twenty-server` ? 588 suites / 5009 tests pass (no
regressions vs main)
- [x] New unit suite `flat-logic-function-validator.service.spec.ts` ?
9/9
- [x] Existing
`workflow-version-step-operations.workspace-service.spec.ts` ? 8/8
(verified the new token-based DI avoids a circular-import regression)
- [x] Snapshot for
`ALL_UNIVERSAL_FLAT_ENTITY_PROPERTIES_TO_COMPARE_AND_STRINGIFY` updated
to include `executionMode`
- [x] Integration suite `logic-function-execution.integration-spec.ts`
extended to assert `executionMode=LIVE` on newly-created functions and
continues to exercise the LIVE happy path
- [ ] Manual staging rollout: flip
`IS_LOGIC_FUNCTION_PREBUILT_MODE_ENABLED` per workspace, observe
`[lambda-timing]` `payloadBytes` drop + `install_duration_ms`, then ramp
in prod.
## Summary
Replaces the bolted-on `isTool` + `toolInputSchema` fields on
`LogicFunctionManifest` with two distinct, opt-in triggers that align
with the existing `cron` / `databaseEvent` / `httpRoute` trigger
pattern:
- **`toolTriggerSettings`** — exposes the function as an AI tool (chat /
MCP / function calling). Uses standard JSON Schema (the format LLMs
natively understand).
- **`workflowActionTriggerSettings`** — exposes the function as a step
in the visual workflow builder. Uses Twenty's rich `InputSchema` so the
builder can render proper `FieldMetadataType`-aware editors, variable
pickers, labels, and an optional `outputSchema`.
A function can opt into none, one, or both. Each surface gets the schema
format appropriate for it.
### Why
`isTool: true` previously exposed the function as both an AI tool AND a
workflow node, with the same JSON Schema feeding both — but the workflow
builder really wants Twenty's `InputSchema` (with `CURRENCY`,
`RELATION`, `EMAILS`, etc.) and the AI surface really wants standard
JSON Schema. Today the workflow builder hacks around this by treating
JSON Schema as `InputSchema`, which silently breaks for any
non-primitive field type. Splitting the triggers fixes that and lets
each surface evolve independently.
### Migration
- **Fast** instance command adds the two new nullable columns.
- **Slow** instance command backfills `toolTriggerSettings` +
`workflowActionTriggerSettings` from `isTool=true` rows (preserving
today's both-surfaces behaviour) then drops the legacy columns.
### Stacked
Stacked on top of #20181. Merge that first, then this.
## Test plan
- [ ] CI green (oxlint, typecheck, jest, vitest)
- [ ] Run `--include-slow` upgrade against a workspace with existing
`isTool=true` logic functions; verify both new columns populated and old
columns dropped
- [ ] Verify AI chat sees migrated tool functions (Linear create-issue,
Exa search) and can call them with the JSON Schema
- [ ] Add an AI-tool function from the Settings UI (toggles
`toolTriggerSettings`) and verify it shows up in chat
- [ ] Add a workflow-action function from the Settings UI (toggles
`workflowActionTriggerSettings`) and verify it appears in the workflow
node picker
- [ ] In the workflow builder, edit a `LOGIC_FUNCTION` step and verify
input fields render (no more JSON-Schema-as-InputSchema hack)
- [ ] Try defining a function with no triggers in the SDK and verify
`defineLogicFunction` rejects it
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: martmull <martmull@hotmail.fr>
# Refactor workflow–logic function interaction
## Why
Workflow code steps and standalone logic functions shared the same build
layer and DB layer, which blurred two use cases: code steps belong to a
workflow version; standalone functions are deployable units. That made
workflow code steps harder to own and evolve.
## Goal
Treat code steps as **workflow-owned**: build and run them in workflow
context, and expose workflow-scoped APIs so the editor can load, test,
and save code step source without going through the generic
logic-function layer.
Removes the versioning system for logic functions (`latestVersion`,
`publishedVersions`) and simplifies the file storage structure.
### Changes
- Remove `publishOneLogicFunctionOrFail` and publishing logic from
workflow status updates
- Add `createLogicFunctionFromExistingLogicFunction` to duplicate logic
functions when creating draft workflow versions
- Update `createDraftStep` to create a new logic function copy instead
of referencing the same one
- Migrate file storage to v2 endpoints with
`applicationUniversalIdentifier`
- Unify path structure: source files at `source/workflow/{id}/`, built
files at `built-logic-function/workflow/{id}/`
- Store full paths in `sourceHandlerPath` and `builtHandlerPath` entity
fields
## Summary
- Remove `latestVersion` and `publishedVersions` columns from
`LogicFunction` entity
- Remove version parameter from logic function execution, build, and
source code retrieval
- Update all related services, DTOs, utilities, and tests
- Add database migration to drop the version columns
Paul Rastoin
