fix: resolve 5 bugs in n8n_manage_datatable (#651)

* feat: add n8n_create_data_table MCP tool and projectId for create workflow (#640)

Add new MCP tool to create n8n data tables via the REST API:
- n8n_create_data_table tool definition with name + columns schema
- handleCreateDataTable handler with Zod validation and N8nApiError handling
- N8nApiClient.createDataTable() calling POST /data-tables
- DataTable, DataTableColumn, DataTableColumnResponse types per OpenAPI spec
- Column types: string | number | boolean | date | json
- Input validation: .min(1) on table name and column names
- Tool documentation with examples, use cases, and pitfalls

Also adds projectId parameter to n8n_create_workflow for enterprise
project support, and fixes stale management tool count in health check.

Based on work by @djakielski in PR #646.
Co-Authored-By: Dominik Jakielski <dominik.jakielski@urlaubsguru.de>

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: replace n8n_create_data_table with n8n_manage_datatable (10 actions)

Replaces the single-purpose n8n_create_data_table tool with a comprehensive
n8n_manage_datatable tool covering all 10 n8n data table API endpoints:

Table operations: createTable, listTables, getTable, updateTable, deleteTable
Row operations: getRows, insertRows, updateRows, upsertRows, deleteRows

- Filter system with and/or logic and 8 condition operators
- Dry-run support for updateRows, upsertRows, deleteRows
- Pagination, sorting, and full-text search for row listing
- 9 new N8nApiClient methods for all data table endpoints
- Shared error handler and consolidated Zod schemas
- Comprehensive tool documentation with examples per action
- 36 handler tests + 18 API client tests

BREAKING: n8n_create_data_table removed. Use n8n_manage_datatable with
action="createTable" instead.

Based on work by @djakielski in PR #646.
Co-Authored-By: Dominik Jakielski <dominik.jakielski@urlaubsguru.de>

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

CHANGELOG.md

@@ -7,6 +7,83 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.40.1] - 2026-03-21
+
+### Fixed
+
+- **`n8n_manage_datatable` row operations broken by MCP transport serialization**: `data` parameter received as string instead of JSON — added `z.preprocess` coercers for array/object/filter params
+- **`n8n_manage_datatable` filter/sortBy URL encoding**: n8n API requires URL-encoded query params — added `encodeURIComponent()` for filter and sortBy in getRows and deleteRows
+- **`json` column type rejected by n8n API**: Removed `json` from column type enum (n8n only accepts string/number/boolean/date)
+- **Garbled 404 error messages**: Fixed `N8nNotFoundError` constructor — API error messages are now passed through cleanly instead of being wrapped in "Resource with ID ... not found"
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
+## [2.40.0] - 2026-03-21
+
+### Changed
+
+- **`n8n_manage_datatable` MCP tool** (replaces `n8n_create_data_table`): Full data table management covering all 10 n8n data table API endpoints
+  - **Table operations**: createTable, listTables, getTable, updateTable, deleteTable
+  - **Row operations**: getRows, insertRows, updateRows, upsertRows, deleteRows
+  - Filter system with and/or logic and 8 condition operators (eq, neq, like, ilike, gt, gte, lt, lte)
+  - Dry-run support for updateRows, upsertRows, deleteRows
+  - Pagination, sorting, and full-text search for row listing
+  - Shared error handler and consolidated Zod schemas for consistency
+  - 9 new `N8nApiClient` methods for all data table endpoints
+- **`projectId` parameter for `n8n_create_workflow`**: Create workflows directly in a specific team project (enterprise feature)
+
+### Breaking
+
+- `n8n_create_data_table` tool replaced by `n8n_manage_datatable` with `action: "createTable"`
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
+## [2.38.0] - 2026-03-20
+
+### Added
+
+- **`transferWorkflow` diff operation** (Issue #644): Move workflows between projects via `n8n_update_partial_workflow`
+  - New `transferWorkflow` operation type with `destinationProjectId` parameter
+  - Calls `PUT /workflows/{id}/transfer` via dedicated API after workflow update
+  - Proper error handling: returns `{ success: false, saved: true }` when transfer fails after update
+  - Transfer executes before activation so workflow is in target project first
+  - Zod schema validates `destinationProjectId` is non-empty
+  - Updated tool description and documentation to list the new operation
+  - `inferIntentFromOperations` returns descriptive intent for transfer operations
+  - `N8nApiClient.transferWorkflow()` method added
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
+## [2.37.4] - 2026-03-18
+
+### Changed
+
+- **Updated n8n dependencies**: n8n 2.11.4 → 2.12.3, n8n-core 2.11.1 → 2.12.0, n8n-workflow 2.11.1 → 2.12.0, @n8n/n8n-nodes-langchain 2.11.2 → 2.12.0
+- **Rebuilt node database**: 1,239 nodes (809 from n8n-nodes-base and @n8n/n8n-nodes-langchain, 430 community)
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
+## [2.37.3] - 2026-03-15
+
+### Fixed
+
+- **updateNode `name`/`id` field normalization**: LLMs sending `{type: "updateNode", name: "Code", ...}` instead of `nodeName` no longer get "Node not found" errors. The Zod schema now normalizes `name` → `nodeName` and `id` → `nodeId` for node-targeting operations (updateNode, removeNode, moveNode, enableNode, disableNode)
+- **AI connection types in disconnected-node detection** (Issue #581): Replaced hardcoded 7-type list with dynamic iteration over all connection types present in workflow data. Nodes connected via `ai_outputParser`, `ai_document`, `ai_textSplitter`, `ai_agent`, `ai_chain`, `ai_retriever` are no longer falsely flagged as disconnected during save
+- **Connection schema and reference validation** (Issue #581): Added `.catchall()` to `workflowConnectionSchema` for unknown AI connection types, and extended connection reference validation to check all connection types (not just `main`)
+- **autofix `filterOperationsByFixes` ID-vs-name mismatch**: Typeversion-upgrade operations now include `nodeName` alongside `nodeId`, and the filter checks both fields. Previously, `applyFixes=true` silently dropped all typeversion fixes because `fixedNodes` contained names but the filter only checked `nodeId` (UUID)
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
+## [2.37.2] - 2026-03-15
+
+### Fixed
+
+- **Code validator `$()` false positive** (Issue #294): `$('Previous Node').first().json` no longer triggers "Invalid $ usage detected" warning. Added `(` and `_` to the regex negative lookahead to support standard n8n cross-node references and valid JS identifiers like `$_var`
+- **Code validator helper function return false positive** (Issue #293): `function isValid(item) { return false; }` no longer triggers "Cannot return primitive values directly" error. Added helper function detection to skip primitive return checks when named functions or arrow function assignments are present
+- **Null property removal in diff engine** (Issue #611): `{continueOnFail: null}` no longer causes Zod validation error "Expected boolean, received null". The diff engine now treats `null` values as property deletion (`delete` operator), and documentation updated from `undefined` to `null` for property removal
+
+Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
+
 ## [2.37.1] - 2026-03-14
 
 ### Fixed

README.md

@@ -5,7 +5,7 @@
 [![npm version](https://img.shields.io/npm/v/n8n-mcp.svg)](https://www.npmjs.com/package/n8n-mcp)
 [![codecov](https://codecov.io/gh/czlonkowski/n8n-mcp/graph/badge.svg?token=YOUR_TOKEN)](https://codecov.io/gh/czlonkowski/n8n-mcp)
 [![Tests](https://img.shields.io/badge/tests-3336%20passing-brightgreen.svg)](https://github.com/czlonkowski/n8n-mcp/actions)
-[![n8n version](https://img.shields.io/badge/n8n-2.11.4-orange.svg)](https://github.com/n8n-io/n8n)
+[![n8n version](https://img.shields.io/badge/n8n-2.12.3-orange.svg)](https://github.com/n8n-io/n8n)
 [![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fczlonkowski%2Fn8n--mcp-green.svg)](https://github.com/czlonkowski/n8n-mcp/pkgs/container/n8n-mcp)
 [![Deploy on Railway](https://railway.com/button.svg)](https://railway.com/deploy/n8n-mcp?referralCode=n8n-mcp)
 

dist/mcp/handlers-n8n-manager.d.ts.map

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dist/mcp/handlers-n8n-manager.js

@@ -288,6 +288,15 @@ async function handleCreateWorkflow(args, context) {
             };
         }
         const workflow = await client.createWorkflow(input);
+        if (!workflow || !workflow.id) {
+            return {
+                success: false,
+                error: 'Workflow creation failed: n8n API returned an empty or invalid response. Verify your N8N_API_URL points to the correct /api/v1 endpoint and that the n8n instance supports workflow creation.',
+                details: {
+                    response: workflow ? { keys: Object.keys(workflow) } : null
+                }
+            };
+        }
         telemetry_1.telemetry.trackWorkflowCreation(workflow, true);
         return {
             success: true,

dist/mcp/handlers-workflow-diff.d.ts.map

@@ -1 +1 @@
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dist/mcp/handlers-workflow-diff.js

@@ -50,6 +50,9 @@ function getValidator(repository) {
     }
     return cachedValidator;
 }
+const NODE_TARGETING_OPERATIONS = new Set([
+    'updateNode', 'removeNode', 'moveNode', 'enableNode', 'disableNode'
+]);
 const workflowDiffSchema = zod_1.z.object({
     id: zod_1.z.string(),
     operations: zod_1.z.array(zod_1.z.object({
@@ -64,8 +67,8 @@ const workflowDiffSchema = zod_1.z.object({
         target: zod_1.z.string().optional(),
         from: zod_1.z.string().optional(),
         to: zod_1.z.string().optional(),
-        sourceOutput: zod_1.z.string().optional(),
-        targetInput: zod_1.z.string().optional(),
+        sourceOutput: zod_1.z.union([zod_1.z.string(), zod_1.z.number()]).transform(String).optional(),
+        targetInput: zod_1.z.union([zod_1.z.string(), zod_1.z.number()]).transform(String).optional(),
         sourceIndex: zod_1.z.number().optional(),
         targetIndex: zod_1.z.number().optional(),
         branch: zod_1.z.enum(['true', 'false']).optional(),
@@ -76,6 +79,20 @@ const workflowDiffSchema = zod_1.z.object({
         settings: zod_1.z.any().optional(),
         name: zod_1.z.string().optional(),
         tag: zod_1.z.string().optional(),
+        destinationProjectId: zod_1.z.string().min(1).optional(),
+        id: zod_1.z.string().optional(),
+    }).transform((op) => {
+        if (NODE_TARGETING_OPERATIONS.has(op.type)) {
+            if (!op.nodeName && !op.nodeId && op.name) {
+                op.nodeName = op.name;
+                op.name = undefined;
+            }
+            if (!op.nodeId && op.id) {
+                op.nodeId = op.id;
+                op.id = undefined;
+            }
+        }
+        return op;
     })),
     validateOnly: zod_1.z.boolean().optional(),
     continueOnError: zod_1.z.boolean().optional(),
@@ -167,11 +184,12 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
             else {
                 return {
                     success: false,
+                    saved: false,
                     error: 'Failed to apply diff operations',
+                    operationsApplied: diffResult.operationsApplied,
                     details: {
                         errors: diffResult.errors,
                         warnings: diffResult.warnings,
-                        operationsApplied: diffResult.operationsApplied,
                         applied: diffResult.applied,
                         failed: diffResult.failed
                     }
@@ -239,6 +257,7 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
                 if (!skipValidation) {
                     return {
                         success: false,
+                        saved: false,
                         error: errorMessage,
                         details: {
                             errors: structureErrors,
@@ -247,7 +266,7 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
                             applied: diffResult.applied,
                             recoveryGuidance: recoverySteps,
                             note: 'Operations were applied but created an invalid workflow structure. The workflow was NOT saved to n8n to prevent UI rendering errors.',
-                            autoSanitizationNote: 'Auto-sanitization runs on all nodes during updates to fix operator structures and add missing metadata. However, it cannot fix all issues (e.g., broken connections, branch mismatches). Use the recovery guidance above to resolve remaining issues.'
+                            autoSanitizationNote: 'Auto-sanitization runs on modified nodes during updates to fix operator structures and add missing metadata. However, it cannot fix all issues (e.g., broken connections, branch mismatches). Use the recovery guidance above to resolve remaining issues.'
                         }
                     };
                 }
@@ -259,6 +278,77 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
         }
         try {
             const updatedWorkflow = await client.updateWorkflow(input.id, diffResult.workflow);
+            let tagWarnings = [];
+            if (diffResult.tagsToAdd?.length || diffResult.tagsToRemove?.length) {
+                try {
+                    const existingTags = Array.isArray(updatedWorkflow.tags)
+                        ? updatedWorkflow.tags.map((t) => typeof t === 'object' ? { id: t.id, name: t.name } : { id: '', name: t })
+                        : [];
+                    const allTags = await client.listTags();
+                    const tagMap = new Map();
+                    for (const t of allTags.data) {
+                        if (t.id)
+                            tagMap.set(t.name.toLowerCase(), t.id);
+                    }
+                    for (const tagName of (diffResult.tagsToAdd || [])) {
+                        if (!tagMap.has(tagName.toLowerCase())) {
+                            try {
+                                const newTag = await client.createTag({ name: tagName });
+                                if (newTag.id)
+                                    tagMap.set(tagName.toLowerCase(), newTag.id);
+                            }
+                            catch (createErr) {
+                                tagWarnings.push(`Failed to create tag "${tagName}": ${createErr instanceof Error ? createErr.message : 'Unknown error'}`);
+                            }
+                        }
+                    }
+                    const currentTagIds = new Set();
+                    for (const et of existingTags) {
+                        if (et.id) {
+                            currentTagIds.add(et.id);
+                        }
+                        else {
+                            const resolved = tagMap.get(et.name.toLowerCase());
+                            if (resolved)
+                                currentTagIds.add(resolved);
+                        }
+                    }
+                    for (const tagName of (diffResult.tagsToAdd || [])) {
+                        const tagId = tagMap.get(tagName.toLowerCase());
+                        if (tagId)
+                            currentTagIds.add(tagId);
+                    }
+                    for (const tagName of (diffResult.tagsToRemove || [])) {
+                        const tagId = tagMap.get(tagName.toLowerCase());
+                        if (tagId)
+                            currentTagIds.delete(tagId);
+                    }
+                    await client.updateWorkflowTags(input.id, Array.from(currentTagIds));
+                }
+                catch (tagError) {
+                    tagWarnings.push(`Tag update failed: ${tagError instanceof Error ? tagError.message : 'Unknown error'}`);
+                    logger_1.logger.warn('Tag operations failed (non-blocking)', tagError);
+                }
+            }
+            let transferMessage = '';
+            if (diffResult.transferToProjectId) {
+                try {
+                    await client.transferWorkflow(input.id, diffResult.transferToProjectId);
+                    transferMessage = ` Workflow transferred to project ${diffResult.transferToProjectId}.`;
+                }
+                catch (transferError) {
+                    logger_1.logger.error('Failed to transfer workflow to project', transferError);
+                    return {
+                        success: false,
+                        saved: true,
+                        error: 'Workflow updated successfully but project transfer failed',
+                        details: {
+                            workflowUpdated: true,
+                            transferError: transferError instanceof Error ? transferError.message : 'Unknown error'
+                        }
+                    };
+                }
+            }
             let finalWorkflow = updatedWorkflow;
             let activationMessage = '';
             try {
@@ -286,6 +376,7 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
                     logger_1.logger.error('Failed to activate workflow after update', activationError);
                     return {
                         success: false,
+                        saved: true,
                         error: 'Workflow updated successfully but activation failed',
                         details: {
                             workflowUpdated: true,
@@ -303,6 +394,7 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
                     logger_1.logger.error('Failed to deactivate workflow after update', deactivationError);
                     return {
                         success: false,
+                        saved: true,
                         error: 'Workflow updated successfully but deactivation failed',
                         details: {
                             workflowUpdated: true,
@@ -329,6 +421,7 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
             }
             return {
                 success: true,
+                saved: true,
                 data: {
                     id: finalWorkflow.id,
                     name: finalWorkflow.name,
@@ -336,12 +429,12 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
                     nodeCount: finalWorkflow.nodes?.length || 0,
                     operationsApplied: diffResult.operationsApplied
                 },
-                message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
+                message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${transferMessage}${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
                 details: {
                     applied: diffResult.applied,
                     failed: diffResult.failed,
                     errors: diffResult.errors,
-                    warnings: diffResult.warnings
+                    warnings: mergeWarnings(diffResult.warnings, tagWarnings)
                 }
             };
         }
@@ -379,7 +472,9 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
             return {
                 success: false,
                 error: 'Invalid input',
-                details: { errors: error.errors }
+                details: {
+                    errors: error.errors.map(e => `${e.path.join('.')}: ${e.message}`)
+                }
             };
         }
         logger_1.logger.error('Failed to update partial workflow', error);
@@ -389,6 +484,13 @@ async function handleUpdatePartialWorkflow(args, repository, context) {
         };
     }
 }
+function mergeWarnings(diffWarnings, tagWarnings) {
+    const merged = [
+        ...(diffWarnings || []),
+        ...tagWarnings.map(w => ({ operation: -1, message: w }))
+    ];
+    return merged.length > 0 ? merged : undefined;
+}
 function inferIntentFromOperations(operations) {
     if (!operations || operations.length === 0) {
         return 'Partial workflow update';
@@ -416,6 +518,8 @@ function inferIntentFromOperations(operations) {
                 return 'Activate workflow';
             case 'deactivateWorkflow':
                 return 'Deactivate workflow';
+            case 'transferWorkflow':
+                return `Transfer workflow to project ${op.destinationProjectId || ''}`.trim();
             default:
                 return `Workflow ${op.type}`;
         }

dist/mcp/server.d.ts.map

@@ -1 +1 @@
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+{"version":3,"file":"server.d.ts","sourceRoot":"","sources":["../../src/mcp/server.ts"],"names":[],"mappings":"AA0CA,OAAO,EAAE,eAAe,EAAE,MAAM,2BAA2B,CAAC;AAE5D,OAAO,EAAE,gBAAgB,EAAE,MAAM,iCAAiC,CAAC;AAmGnE,qBAAa,yBAAyB;IACpC,OAAO,CAAC,MAAM,CAAS;IACvB,OAAO,CAAC,EAAE,CAAgC;IAC1C,OAAO,CAAC,UAAU,CAA+B;IACjD,OAAO,CAAC,eAAe,CAAgC;IACvD,OAAO,CAAC,WAAW,CAAgB;IACnC,OAAO,CAAC,KAAK,CAAqB;IAClC,OAAO,CAAC,UAAU,CAAa;IAC/B,OAAO,CAAC,eAAe,CAAC,CAAkB;IAC1C,OAAO,CAAC,YAAY,CAAuB;IAC3C,OAAO,CAAC,qBAAqB,CAAsB;IACnD,OAAO,CAAC,WAAW,CAAiC;IACpD,OAAO,CAAC,kBAAkB,CAA4B;IACtD,OAAO,CAAC,iBAAiB,CAAkB;IAC3C,OAAO,CAAC,aAAa,CAAoC;IACzD,OAAO,CAAC,UAAU,CAAkB;gBAExB,eAAe,CAAC,EAAE,eAAe,EAAE,WAAW,CAAC,EAAE,gBAAgB;IA8GvE,KAAK,IAAI,OAAO,CAAC,IAAI,CAAC;YA+Cd,kBAAkB;YAiDlB,wBAAwB;IA0BtC,OAAO,CAAC,kBAAkB;YA6CZ,iBAAiB;IAa/B,OAAO,CAAC,eAAe,CAAkB;YAE3B,sBAAsB;IAgDpC,OAAO,CAAC,gBAAgB;IAqCxB,OAAO,CAAC,aAAa;IA0XrB,OAAO,CAAC,wBAAwB;IAoFhC,OAAO,CAAC,kBAAkB;IAqE1B,OAAO,CAAC,uBAAuB;IAwB/B,OAAO,CAAC,qBAAqB;IAiF7B,OAAO,CAAC,2BAA2B;YA0UrB,SAAS;YA2DT,WAAW;YAkFX,WAAW;YA0CX,cAAc;YA8Md,gBAAgB;IAqD9B,OAAO,CAAC,mBAAmB;IAwE3B,OAAO,CAAC,eAAe;YAsBT,eAAe;IA2L7B,OAAO,CAAC,kBAAkB;IAQ1B,OAAO,CAAC,uBAAuB;IA0D/B,OAAO,CAAC,iBAAiB;YAqFX,WAAW;YAgCX,oBAAoB;IAuFlC,OAAO,CAAC,aAAa;YAQP,qBAAqB;YAwDrB,iBAAiB;YAiKjB,OAAO;YAgDP,cAAc;YAwFd,iBAAiB;IAqC/B,OAAO,CAAC,iBAAiB;IA0BzB,OAAO,CAAC,iBAAiB;IA0BzB,OAAO,CAAC,eAAe;IAwCvB,OAAO,CAAC,kBAAkB;IAiC1B,OAAO,CAAC,aAAa;IAoCrB,OAAO,CAAC,0BAA0B;IAgClC,OAAO,CAAC,4BAA4B;YAKtB,oBAAoB;IAsDlC,OAAO,CAAC,gBAAgB;YAiBV,SAAS;YA6CT,kBAAkB;YAqElB,uBAAuB;YAsDvB,iBAAiB;IAqE/B,OAAO,CAAC,qBAAqB;IA8C7B,OAAO,CAAC,uBAAuB;IA4D/B,OAAO,CAAC,wBAAwB;IAkChC,OAAO,CAAC,iBAAiB;YAoDX,mBAAmB;YAoEnB,qBAAqB;IAS7B,OAAO,CAAC,SAAS,EAAE,GAAG,GAAG,OAAO,CAAC,IAAI,CAAC;YAS9B,aAAa;YAcb,iBAAiB;YAoBjB,WAAW;YAwBX,eAAe;YAqBf,mBAAmB;YAwBnB,yBAAyB;IA4CvC,OAAO,CAAC,kBAAkB;YAiBZ,gBAAgB;YA6HhB,2BAA2B;YAiE3B,2BAA2B;IAyEnC,GAAG,IAAI,OAAO,CAAC,IAAI,CAAC;IA0BpB,QAAQ,IAAI,OAAO,CAAC,IAAI,CAAC;CAgEhC"}

dist/mcp/server.js

@@ -124,6 +124,7 @@ class N8NDocumentationMCPServer {
                 this.earlyLogger.logCheckpoint(startup_checkpoints_1.STARTUP_CHECKPOINTS.N8N_API_READY);
             }
         });
+        this.initialized.catch(() => { });
         logger_1.logger.info('Initializing n8n Documentation MCP server');
         this.server = new index_js_1.Server({
             name: 'n8n-documentation-mcp',

dist/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"n8n-update-partial-workflow.d.ts","sourceRoot":"","sources":["../../../../src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,iBAAiB,EAAE,MAAM,UAAU,CAAC;AAE7C,eAAO,MAAM,2BAA2B,EAAE,iBA+ZzC,CAAC"}
+{"version":3,"file":"n8n-update-partial-workflow.d.ts","sourceRoot":"","sources":["../../../../src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,iBAAiB,EAAE,MAAM,UAAU,CAAC;AAE7C,eAAO,MAAM,2BAA2B,EAAE,iBAuazC,CAAC"}

dist/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.js

@@ -5,7 +5,7 @@ exports.n8nUpdatePartialWorkflowDoc = {
     name: 'n8n_update_partial_workflow',
     category: 'workflow_management',
     essentials: {
-        description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
+        description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow, transferWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
         keyParameters: ['id', 'operations', 'continueOnError'],
         example: 'n8n_update_partial_workflow({id: "wf_123", operations: [{type: "rewireConnection", source: "IF", from: "Old", to: "New", branch: "true"}]})',
         performance: 'Fast (50-200ms)',
@@ -23,7 +23,8 @@ exports.n8nUpdatePartialWorkflowDoc = {
             'Batch AI component connections for atomic updates',
             'Auto-sanitization: ALL nodes auto-fixed during updates (operator structures, missing metadata)',
             'Node renames automatically update all connection references - no manual connection operations needed',
-            'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)'
+            'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)',
+            'Transfer workflows between projects: Use transferWorkflow with destinationProjectId (enterprise feature)'
         ]
     },
     full: {
@@ -56,6 +57,9 @@ exports.n8nUpdatePartialWorkflowDoc = {
 - **activateWorkflow**: Activate the workflow to enable automatic execution via triggers
 - **deactivateWorkflow**: Deactivate the workflow to prevent automatic execution
 
+### Project Management Operations (1 type):
+- **transferWorkflow**: Transfer the workflow to a different project. Requires \`destinationProjectId\`. Enterprise/cloud feature.
+
 ## Smart Parameters for Multi-Output Nodes
 
 For **IF nodes**, use semantic 'branch' parameter instead of technical sourceIndex:
@@ -195,12 +199,12 @@ Please choose a different name.
 - Can rename a node and add/remove connections using the new name in the same batch
 - Use \`validateOnly: true\` to preview effects before applying
 
-## Removing Properties with undefined
+## Removing Properties with null
 
-To remove a property from a node, set its value to \`undefined\` in the updates object. This is essential when migrating from deprecated properties or cleaning up optional configuration fields.
+To remove a property from a node, set its value to \`null\` in the updates object. This is essential when migrating from deprecated properties or cleaning up optional configuration fields.
 
-### Why Use undefined?
-- **Property removal vs. null**: Setting a property to \`undefined\` removes it completely from the node object, while \`null\` sets the property to a null value
+### Why Use null?
+- **Property removal**: Setting a property to \`null\` removes it completely from the node object
 - **Validation constraints**: Some properties are mutually exclusive (e.g., \`continueOnFail\` and \`onError\`). Simply setting one without removing the other will fail validation
 - **Deprecated property migration**: When n8n deprecates properties, you must remove the old property before the new one will work
 
@@ -212,7 +216,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeName: "HTTP Request",
-    updates: { onError: undefined }
+    updates: { onError: null }
   }]
 });
 
@@ -222,7 +226,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeId: "node_abc",
-    updates: { disabled: undefined }
+    updates: { disabled: null }
   }]
 });
 \`\`\`
@@ -236,7 +240,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeName: "API Request",
-    updates: { "parameters.authentication": undefined }
+    updates: { "parameters.authentication": null }
   }]
 });
 
@@ -246,7 +250,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeName: "HTTP Request",
-    updates: { "parameters.headers": undefined }
+    updates: { "parameters.headers": null }
   }]
 });
 \`\`\`
@@ -272,7 +276,7 @@ n8n_update_partial_workflow({
     type: "updateNode",
     nodeName: "HTTP Request",
     updates: {
-      continueOnFail: undefined,
+      continueOnFail: null,
       onError: "continueErrorOutput"
     }
   }]
@@ -288,15 +292,15 @@ n8n_update_partial_workflow({
     type: "updateNode",
     nodeName: "Data Processor",
     updates: {
-      continueOnFail: undefined,
-      alwaysOutputData: undefined,
-      "parameters.legacy_option": undefined
+      continueOnFail: null,
+      alwaysOutputData: null,
+      "parameters.legacy_option": null
     }
   }]
 });
 \`\`\`
 
-### When to Use undefined
+### When to Use null
 - Removing deprecated properties during migration
 - Cleaning up optional configuration flags
 - Resolving mutual exclusivity validation errors
@@ -342,11 +346,14 @@ n8n_update_partial_workflow({
             '// Rewire AI Agent to use different language model\nn8n_update_partial_workflow({id: "ai9", operations: [{type: "rewireConnection", source: "AI Agent", from: "OpenAI Chat Model", to: "Anthropic Chat Model", sourceOutput: "ai_languageModel"}]})',
             '// Replace all AI tools for an agent\nn8n_update_partial_workflow({id: "ai10", operations: [\n  {type: "removeConnection", source: "Old Tool 1", target: "AI Agent", sourceOutput: "ai_tool"},\n  {type: "removeConnection", source: "Old Tool 2", target: "AI Agent", sourceOutput: "ai_tool"},\n  {type: "addConnection", source: "New HTTP Tool", target: "AI Agent", sourceOutput: "ai_tool"},\n  {type: "addConnection", source: "New Code Tool", target: "AI Agent", sourceOutput: "ai_tool"}\n]})',
             '\n// ============ REMOVING PROPERTIES EXAMPLES ============',
-            '// Remove a simple property\nn8n_update_partial_workflow({id: "rm1", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {onError: undefined}}]})',
-            '// Migrate from deprecated continueOnFail to onError\nn8n_update_partial_workflow({id: "rm2", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {continueOnFail: undefined, onError: "continueErrorOutput"}}]})',
-            '// Remove nested property\nn8n_update_partial_workflow({id: "rm3", operations: [{type: "updateNode", nodeName: "API Request", updates: {"parameters.authentication": undefined}}]})',
-            '// Remove multiple properties\nn8n_update_partial_workflow({id: "rm4", operations: [{type: "updateNode", nodeName: "Data Processor", updates: {continueOnFail: undefined, alwaysOutputData: undefined, "parameters.legacy_option": undefined}}]})',
-            '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": undefined}}]})'
+            '// Remove a simple property\nn8n_update_partial_workflow({id: "rm1", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {onError: null}}]})',
+            '// Migrate from deprecated continueOnFail to onError\nn8n_update_partial_workflow({id: "rm2", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {continueOnFail: null, onError: "continueErrorOutput"}}]})',
+            '// Remove nested property\nn8n_update_partial_workflow({id: "rm3", operations: [{type: "updateNode", nodeName: "API Request", updates: {"parameters.authentication": null}}]})',
+            '// Remove multiple properties\nn8n_update_partial_workflow({id: "rm4", operations: [{type: "updateNode", nodeName: "Data Processor", updates: {continueOnFail: null, alwaysOutputData: null, "parameters.legacy_option": null}}]})',
+            '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": null}}]})',
+            '\n// ============ PROJECT TRANSFER EXAMPLES ============',
+            '// Transfer workflow to a different project\nn8n_update_partial_workflow({id: "tf1", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}]})',
+            '// Transfer and activate in one call\nn8n_update_partial_workflow({id: "tf2", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}, {type: "activateWorkflow"}]})'
         ],
         useCases: [
             'Rewire connections when replacing nodes',
@@ -364,7 +371,8 @@ n8n_update_partial_workflow({
             'Add fallback language models to AI Agents',
             'Configure Vector Store retrieval systems',
             'Swap language models in existing AI workflows',
-            'Batch-update AI tool connections'
+            'Batch-update AI tool connections',
+            'Transfer workflows between team projects (enterprise)'
         ],
         performance: 'Very fast - typically 50-200ms. Much faster than full updates as only changes are processed.',
         bestPractices: [
@@ -384,9 +392,9 @@ n8n_update_partial_workflow({
             'Use targetIndex for fallback models (primary=0, fallback=1)',
             'Batch AI component connections in a single operation for atomicity',
             'Validate AI workflows after connection changes to catch configuration errors',
-            'To remove properties, set them to undefined (not null) in the updates object',
+            'To remove properties, set them to null in the updates object',
             'When migrating from deprecated properties, remove the old property and add the new one in the same operation',
-            'Use undefined to resolve mutual exclusivity validation errors between properties',
+            'Use null to resolve mutual exclusivity validation errors between properties',
             'Batch multiple property removals in a single updateNode operation for efficiency'
         ],
         pitfalls: [
@@ -408,8 +416,8 @@ n8n_update_partial_workflow({
             '**Auto-sanitization runs on ALL nodes**: When ANY update is made, ALL nodes in the workflow are sanitized (not just modified ones)',
             '**Auto-sanitization cannot fix everything**: It fixes operator structures and missing metadata, but cannot fix broken connections or branch mismatches',
             '**Corrupted workflows beyond repair**: Workflows in paradoxical states (API returns corrupt, API rejects updates) cannot be fixed via API - must be recreated',
-            'Setting a property to null does NOT remove it - use undefined instead',
-            'When properties are mutually exclusive (e.g., continueOnFail and onError), setting only the new property will fail - you must remove the old one with undefined',
+            'To remove a property, set it to null in the updates object',
+            'When properties are mutually exclusive (e.g., continueOnFail and onError), setting only the new property will fail - you must remove the old one with null',
             'Removing a required property may cause validation errors - check node documentation first',
             'Nested property removal with dot notation only removes the specific nested field, not the entire parent object',
             'Array index notation (e.g., "parameters.headers[0]") is not supported - remove the entire array property instead'

dist/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.js.map

@@ -1 +1 @@
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dist/mcp/tools-n8n-manager.js

@@ -137,7 +137,7 @@ exports.n8nManagementTools = [
     },
     {
         name: 'n8n_update_partial_workflow',
-        description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
+        description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag, activate/deactivateWorkflow, transferWorkflow. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
         inputSchema: {
             type: 'object',
             additionalProperties: true,

dist/services/ai-tool-validators.d.ts

@@ -33,8 +33,8 @@ export declare function validateVectorStoreTool(node: WorkflowNode, reverseConne
 export declare function validateWorkflowTool(node: WorkflowNode, reverseConnections?: Map<string, ReverseConnection[]>): ValidationIssue[];
 export declare function validateAIAgentTool(node: WorkflowNode, reverseConnections: Map<string, ReverseConnection[]>): ValidationIssue[];
 export declare function validateMCPClientTool(node: WorkflowNode): ValidationIssue[];
-export declare function validateCalculatorTool(node: WorkflowNode): ValidationIssue[];
-export declare function validateThinkTool(node: WorkflowNode): ValidationIssue[];
+export declare function validateCalculatorTool(_node: WorkflowNode): ValidationIssue[];
+export declare function validateThinkTool(_node: WorkflowNode): ValidationIssue[];
 export declare function validateSerpApiTool(node: WorkflowNode): ValidationIssue[];
 export declare function validateWikipediaTool(node: WorkflowNode): ValidationIssue[];
 export declare function validateSearXngTool(node: WorkflowNode): ValidationIssue[];

dist/services/ai-tool-validators.d.ts.map

@@ -1 +1 @@
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dist/services/ai-tool-validators.js

@@ -21,9 +21,14 @@ const MIN_DESCRIPTION_LENGTH_MEDIUM = 15;
 const MIN_DESCRIPTION_LENGTH_LONG = 20;
 const MAX_ITERATIONS_WARNING_THRESHOLD = 50;
 const MAX_TOPK_WARNING_THRESHOLD = 20;
+function getToolDescription(node) {
+    return (node.parameters.toolDescription ||
+        node.parameters.description ||
+        node.parameters.options?.description);
+}
 function validateHTTPRequestTool(node) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -32,7 +37,7 @@ function validateHTTPRequestTool(node) {
             code: 'MISSING_TOOL_DESCRIPTION'
         });
     }
-    else if (node.parameters.toolDescription.trim().length < MIN_DESCRIPTION_LENGTH_MEDIUM) {
+    else if (getToolDescription(node).trim().length < MIN_DESCRIPTION_LENGTH_MEDIUM) {
         issues.push({
             severity: 'warning',
             nodeId: node.id,
@@ -154,7 +159,7 @@ function validateHTTPRequestTool(node) {
 }
 function validateCodeTool(node) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -184,7 +189,7 @@ function validateCodeTool(node) {
 }
 function validateVectorStoreTool(node, reverseConnections, workflow) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -216,7 +221,7 @@ function validateVectorStoreTool(node, reverseConnections, workflow) {
 }
 function validateWorkflowTool(node, reverseConnections) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -238,7 +243,7 @@ function validateWorkflowTool(node, reverseConnections) {
 }
 function validateAIAgentTool(node, reverseConnections) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -270,7 +275,7 @@ function validateAIAgentTool(node, reverseConnections) {
 }
 function validateMCPClientTool(node) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -290,17 +295,15 @@ function validateMCPClientTool(node) {
     }
     return issues;
 }
-function validateCalculatorTool(node) {
-    const issues = [];
-    return issues;
+function validateCalculatorTool(_node) {
+    return [];
 }
-function validateThinkTool(node) {
-    const issues = [];
-    return issues;
+function validateThinkTool(_node) {
+    return [];
 }
 function validateSerpApiTool(node) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -321,7 +324,7 @@ function validateSerpApiTool(node) {
 }
 function validateWikipediaTool(node) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -345,7 +348,7 @@ function validateWikipediaTool(node) {
 }
 function validateSearXngTool(node) {
     const issues = [];
-    if (!node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'error',
             nodeId: node.id,
@@ -376,7 +379,7 @@ function validateWolframAlphaTool(node) {
             code: 'MISSING_CREDENTIALS'
         });
     }
-    if (!node.parameters.description && !node.parameters.toolDescription) {
+    if (!getToolDescription(node)) {
         issues.push({
             severity: 'info',
             nodeId: node.id,

dist/services/n8n-api-client.d.ts

@@ -20,6 +20,7 @@ export declare class N8nApiClient {
     getWorkflow(id: string): Promise<Workflow>;
     updateWorkflow(id: string, workflow: Partial<Workflow>): Promise<Workflow>;
     deleteWorkflow(id: string): Promise<Workflow>;
+    transferWorkflow(id: string, destinationProjectId: string): Promise<void>;
     activateWorkflow(id: string): Promise<Workflow>;
     deactivateWorkflow(id: string): Promise<Workflow>;
     listWorkflows(params?: WorkflowListParams): Promise<WorkflowListResponse>;
@@ -36,6 +37,7 @@ export declare class N8nApiClient {
     createTag(tag: Partial<Tag>): Promise<Tag>;
     updateTag(id: string, tag: Partial<Tag>): Promise<Tag>;
     deleteTag(id: string): Promise<void>;
+    updateWorkflowTags(workflowId: string, tagIds: string[]): Promise<Tag[]>;
     getSourceControlStatus(): Promise<SourceControlStatus>;
     pullSourceControl(force?: boolean): Promise<SourceControlPullResult>;
     pushSourceControl(message: string, fileNames?: string[]): Promise<SourceControlPushResult>;

dist/services/n8n-api-client.d.ts.map

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dist/services/n8n-api-client.js

@@ -194,9 +194,17 @@ class N8nApiClient {
             throw (0, n8n_errors_1.handleN8nApiError)(error);
         }
     }
+    async transferWorkflow(id, destinationProjectId) {
+        try {
+            await this.client.put(`/workflows/${id}/transfer`, { destinationProjectId });
+        }
+        catch (error) {
+            throw (0, n8n_errors_1.handleN8nApiError)(error);
+        }
+    }
     async activateWorkflow(id) {
         try {
-            const response = await this.client.post(`/workflows/${id}/activate`);
+            const response = await this.client.post(`/workflows/${id}/activate`, {});
             return response.data;
         }
         catch (error) {
@@ -205,7 +213,7 @@ class N8nApiClient {
     }
     async deactivateWorkflow(id) {
         try {
-            const response = await this.client.post(`/workflows/${id}/deactivate`);
+            const response = await this.client.post(`/workflows/${id}/deactivate`, {});
             return response.data;
         }
         catch (error) {
@@ -365,6 +373,15 @@ class N8nApiClient {
             throw (0, n8n_errors_1.handleN8nApiError)(error);
         }
     }
+    async updateWorkflowTags(workflowId, tagIds) {
+        try {
+            const response = await this.client.put(`/workflows/${workflowId}/tags`, tagIds.filter(id => id).map(id => ({ id })));
+            return response.data;
+        }
+        catch (error) {
+            throw (0, n8n_errors_1.handleN8nApiError)(error);
+        }
+    }
     async getSourceControlStatus() {
         try {
             const response = await this.client.get('/source-control/status');

dist/services/n8n-validation.d.ts

@@ -144,79 +144,227 @@ export declare const workflowConnectionSchema: z.ZodRecord<z.ZodString, z.ZodObj
         node: string;
         index: number;
     }>, "many">, "many">>;
+}, "strip", z.ZodArray<z.ZodArray<z.ZodObject<{
+    node: z.ZodString;
+    type: z.ZodString;
+    index: z.ZodNumber;
 }, "strip", z.ZodTypeAny, {
-    error?: {
-        type: string;
-        node: string;
-        index: number;
-    }[][] | undefined;
-    main?: {
-        type: string;
-        node: string;
-        index: number;
-    }[][] | undefined;
-    ai_tool?: {
-        type: string;
-        node: string;
-        index: number;
-    }[][] | undefined;
-    ai_languageModel?: {
-        type: string;
-        node: string;
-        index: number;
-    }[][] | undefined;
-    ai_memory?: {
-        type: string;
-        node: string;
-        index: number;
-    }[][] | undefined;
-    ai_embedding?: {
-        type: string;
-        node: string;
-        index: number;
-    }[][] | undefined;
-    ai_vectorStore?: {
-        type: string;
-        node: string;
-        index: number;
-    }[][] | undefined;
+    type: string;
+    node: string;
+    index: number;
 }, {
-    error?: {
+    type: string;
+    node: string;
+    index: number;
+}>, "many">, "many">, z.objectOutputType<{
+    main: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
         type: string;
         node: string;
         index: number;
-    }[][] | undefined;
-    main?: {
+    }, {
         type: string;
         node: string;
         index: number;
-    }[][] | undefined;
-    ai_tool?: {
+    }>, "many">, "many">>;
+    error: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
         type: string;
         node: string;
         index: number;
-    }[][] | undefined;
-    ai_languageModel?: {
+    }, {
         type: string;
         node: string;
         index: number;
-    }[][] | undefined;
-    ai_memory?: {
+    }>, "many">, "many">>;
+    ai_tool: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
         type: string;
         node: string;
         index: number;
-    }[][] | undefined;
-    ai_embedding?: {
+    }, {
         type: string;
         node: string;
         index: number;
-    }[][] | undefined;
-    ai_vectorStore?: {
+    }>, "many">, "many">>;
+    ai_languageModel: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
         type: string;
         node: string;
         index: number;
-    }[][] | undefined;
-}>>;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_memory: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_embedding: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_vectorStore: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+}, z.ZodArray<z.ZodArray<z.ZodObject<{
+    node: z.ZodString;
+    type: z.ZodString;
+    index: z.ZodNumber;
+}, "strip", z.ZodTypeAny, {
+    type: string;
+    node: string;
+    index: number;
+}, {
+    type: string;
+    node: string;
+    index: number;
+}>, "many">, "many">, "strip">, z.objectInputType<{
+    main: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    error: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_tool: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_languageModel: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_memory: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_embedding: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+    ai_vectorStore: z.ZodOptional<z.ZodArray<z.ZodArray<z.ZodObject<{
+        node: z.ZodString;
+        type: z.ZodString;
+        index: z.ZodNumber;
+    }, "strip", z.ZodTypeAny, {
+        type: string;
+        node: string;
+        index: number;
+    }, {
+        type: string;
+        node: string;
+        index: number;
+    }>, "many">, "many">>;
+}, z.ZodArray<z.ZodArray<z.ZodObject<{
+    node: z.ZodString;
+    type: z.ZodString;
+    index: z.ZodNumber;
+}, "strip", z.ZodTypeAny, {
+    type: string;
+    node: string;
+    index: number;
+}, {
+    type: string;
+    node: string;
+    index: number;
+}>, "many">, "many">, "strip">>>;
 export declare const workflowSettingsSchema: z.ZodObject<{
     executionOrder: z.ZodDefault<z.ZodEnum<["v0", "v1"]>>;
     timezone: z.ZodOptional<z.ZodString>;

dist/services/n8n-validation.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"n8n-validation.d.ts","sourceRoot":"","sources":["../../src/services/n8n-validation.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,CAAC,EAAE,MAAM,KAAK,CAAC;AACxB,OAAO,EAAE,YAAY,EAAE,kBAAkB,EAAE,QAAQ,EAAE,MAAM,kBAAkB,CAAC;AAM9E,eAAO,MAAM,kBAAkB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAiB7B,CAAC;AAkBH,eAAO,MAAM,wBAAwB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAUpC,CAAC;AAEF,eAAO,MAAM,sBAAsB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAWjC,CAAC;AAGH,eAAO,MAAM,uBAAuB;;;;;;CAMnC,CAAC;AAGF,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,OAAO,GAAG,YAAY,CAEhE;AAED,wBAAgB,2BAA2B,CAAC,WAAW,EAAE,OAAO,GAAG,kBAAkB,CAEpF;AAED,wBAAgB,wBAAwB,CAAC,QAAQ,EAAE,OAAO,GAAG,CAAC,CAAC,KAAK,CAAC,OAAO,sBAAsB,CAAC,CAElG;AAGD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC,CAsBrF;AAiBD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAAC,QAAQ,CAAC,CAoE5E;AAGD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,MAAM,EAAE,CA6P/E;AAGD,wBAAgB,iBAAiB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAK7D;AAMD,wBAAgB,+BAA+B,CAAC,IAAI,EAAE,YAAY,GAAG,MAAM,EAAE,CA+F5E;AAMD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,GAAG,EAAE,IAAI,EAAE,MAAM,GAAG,MAAM,EAAE,CA0D/E;AAGD,wBAAgB,aAAa,CAAC,QAAQ,EAAE,QAAQ,GAAG,MAAM,GAAG,IAAI,CAmB/D;AAGD,wBAAgB,2BAA2B,IAAI,MAAM,CA6CpD;AAGD,wBAAgB,yBAAyB,CAAC,MAAM,EAAE,MAAM,EAAE,GAAG,MAAM,EAAE,CAmBpE"}
+{"version":3,"file":"n8n-validation.d.ts","sourceRoot":"","sources":["../../src/services/n8n-validation.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,CAAC,EAAE,MAAM,KAAK,CAAC;AACxB,OAAO,EAAE,YAAY,EAAE,kBAAkB,EAAE,QAAQ,EAAE,MAAM,kBAAkB,CAAC;AAM9E,eAAO,MAAM,kBAAkB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAiB7B,CAAC;AAkBH,eAAO,MAAM,wBAAwB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;gCAUpC,CAAC;AAEF,eAAO,MAAM,sBAAsB;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAWjC,CAAC;AAGH,eAAO,MAAM,uBAAuB;;;;;;CAMnC,CAAC;AAGF,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,OAAO,GAAG,YAAY,CAEhE;AAED,wBAAgB,2BAA2B,CAAC,WAAW,EAAE,OAAO,GAAG,kBAAkB,CAEpF;AAED,wBAAgB,wBAAwB,CAAC,QAAQ,EAAE,OAAO,GAAG,CAAC,CAAC,KAAK,CAAC,OAAO,sBAAsB,CAAC,CAElG;AAGD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC,CAsBrF;AAiBD,wBAAgB,sBAAsB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAAC,QAAQ,CAAC,CAoE5E;AAGD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,OAAO,CAAC,QAAQ,CAAC,GAAG,MAAM,EAAE,CAkQ/E;AAGD,wBAAgB,iBAAiB,CAAC,QAAQ,EAAE,QAAQ,GAAG,OAAO,CAK7D;AAMD,wBAAgB,+BAA+B,CAAC,IAAI,EAAE,YAAY,GAAG,MAAM,EAAE,CA+F5E;AAMD,wBAAgB,yBAAyB,CAAC,QAAQ,EAAE,GAAG,EAAE,IAAI,EAAE,MAAM,GAAG,MAAM,EAAE,CA0D/E;AAGD,wBAAgB,aAAa,CAAC,QAAQ,EAAE,QAAQ,GAAG,MAAM,GAAG,IAAI,CAmB/D;AAGD,wBAAgB,2BAA2B,IAAI,MAAM,CA6CpD;AAGD,wBAAgB,yBAAyB,CAAC,MAAM,EAAE,MAAM,EAAE,GAAG,MAAM,EAAE,CAmBpE"}

dist/services/n8n-validation.js

@@ -47,7 +47,7 @@ exports.workflowConnectionSchema = zod_1.z.record(zod_1.z.object({
     ai_memory: connectionArraySchema.optional(),
     ai_embedding: connectionArraySchema.optional(),
     ai_vectorStore: connectionArraySchema.optional(),
-}));
+}).catchall(connectionArraySchema));
 exports.workflowSettingsSchema = zod_1.z.object({
     executionOrder: zod_1.z.enum(['v0', 'v1']).default('v1'),
     timezone: zod_1.z.string().optional(),
@@ -152,11 +152,10 @@ function validateWorkflowStructure(workflow) {
         }
         else if (connectionCount > 0 || executableNodes.length > 1) {
             const connectedNodes = new Set();
-            const ALL_CONNECTION_TYPES = ['main', 'error', 'ai_tool', 'ai_languageModel', 'ai_memory', 'ai_embedding', 'ai_vectorStore'];
             Object.entries(workflow.connections).forEach(([sourceName, connection]) => {
                 connectedNodes.add(sourceName);
-                ALL_CONNECTION_TYPES.forEach(connType => {
-                    const connData = connection[connType];
+                const connectionRecord = connection;
+                Object.values(connectionRecord).forEach((connData) => {
                     if (connData && Array.isArray(connData)) {
                         connData.forEach((outputs) => {
                             if (Array.isArray(outputs)) {
@@ -282,23 +281,28 @@ function validateWorkflowStructure(workflow) {
                     errors.push(`Connection references non-existent node: ${sourceName}`);
                 }
             }
-            if (connection.main && Array.isArray(connection.main)) {
-                connection.main.forEach((outputs, outputIndex) => {
-                    if (Array.isArray(outputs)) {
-                        outputs.forEach((target, targetIndex) => {
-                            if (!nodeNames.has(target.node)) {
-                                if (nodeIds.has(target.node)) {
-                                    const correctName = nodeIdToName.get(target.node);
-                                    errors.push(`Connection target uses node ID '${target.node}' but must use node name '${correctName}' (from ${sourceName}[${outputIndex}][${targetIndex}])`);
+            const connectionRecord = connection;
+            Object.values(connectionRecord).forEach((connData) => {
+                if (connData && Array.isArray(connData)) {
+                    connData.forEach((outputs, outputIndex) => {
+                        if (Array.isArray(outputs)) {
+                            outputs.forEach((target, targetIndex) => {
+                                if (!target?.node)
+                                    return;
+                                if (!nodeNames.has(target.node)) {
+                                    if (nodeIds.has(target.node)) {
+                                        const correctName = nodeIdToName.get(target.node);
+                                        errors.push(`Connection target uses node ID '${target.node}' but must use node name '${correctName}' (from ${sourceName}[${outputIndex}][${targetIndex}])`);
+                                    }
+                                    else {
+                                        errors.push(`Connection references non-existent target node: ${target.node} (from ${sourceName}[${outputIndex}][${targetIndex}])`);
+                                    }
                                 }
-                                else {
-                                    errors.push(`Connection references non-existent target node: ${target.node} (from ${sourceName}[${outputIndex}][${targetIndex}])`);
-                                }
-                            }
-                        });
-                    }
-                });
-            }
+                            });
+                        }
+                    });
+                }
+            });
         });
     }
     return errors;

dist/services/node-sanitizer.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"node-sanitizer.d.ts","sourceRoot":"","sources":["../../src/services/node-sanitizer.ts"],"names":[],"mappings":"AAaA,OAAO,EAAE,YAAY,EAAE,MAAM,kBAAkB,CAAC;AAKhD,wBAAgB,YAAY,CAAC,IAAI,EAAE,YAAY,GAAG,YAAY,CAa7D;AAKD,wBAAgB,qBAAqB,CAAC,QAAQ,EAAE,GAAG,GAAG,GAAG,CASxD;AAoND,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,YAAY,GAAG,MAAM,EAAE,CAgEjE"}
+{"version":3,"file":"node-sanitizer.d.ts","sourceRoot":"","sources":["../../src/services/node-sanitizer.ts"],"names":[],"mappings":"AAaA,OAAO,EAAE,YAAY,EAAE,MAAM,kBAAkB,CAAC;AAKhD,wBAAgB,YAAY,CAAC,IAAI,EAAE,YAAY,GAAG,YAAY,CAa7D;AAKD,wBAAgB,qBAAqB,CAAC,QAAQ,EAAE,GAAG,GAAG,GAAG,CASxD;AA6ND,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,YAAY,GAAG,MAAM,EAAE,CAgEjE"}

dist/services/node-sanitizer.js

@@ -17,7 +17,7 @@ function sanitizeWorkflowNodes(workflow) {
     }
     return {
         ...workflow,
-        nodes: workflow.nodes.map((node) => sanitizeNode(node))
+        nodes: workflow.nodes.map(sanitizeNode)
     };
 }
 function isFilterBasedNode(nodeType, typeVersion) {
@@ -66,7 +66,7 @@ function sanitizeFilterConditions(conditions) {
         ...sanitized.options
     };
     if (sanitized.conditions && Array.isArray(sanitized.conditions)) {
-        sanitized.conditions = sanitized.conditions.map((condition) => sanitizeCondition(condition));
+        sanitized.conditions = sanitized.conditions.map(sanitizeCondition);
     }
     return sanitized;
 }
@@ -124,6 +124,10 @@ function inferDataType(operation) {
     if (dateOps.some(op => operation.includes(op))) {
         return 'dateTime';
     }
+    const objectOps = ['empty', 'notEmpty', 'exists', 'notExists'];
+    if (objectOps.includes(operation)) {
+        return 'object';
+    }
     return 'string';
 }
 function isUnaryOperator(operation) {
@@ -132,7 +136,11 @@ function isUnaryOperator(operation) {
         'isNotEmpty',
         'true',
         'false',
-        'isNumeric'
+        'isNumeric',
+        'empty',
+        'notEmpty',
+        'exists',
+        'notExists'
     ];
     return unaryOps.includes(operation);
 }

dist/services/node-specific-validators.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"node-specific-validators.d.ts","sourceRoot":"","sources":["../../src/services/node-specific-validators.ts"],"names":[],"mappings":"AAOA,OAAO,EAAE,eAAe,EAAE,iBAAiB,EAAE,MAAM,oBAAoB,CAAC;AAExE,MAAM,WAAW,qBAAqB;IACpC,MAAM,EAAE,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,CAAC;IAC5B,MAAM,EAAE,eAAe,EAAE,CAAC;IAC1B,QAAQ,EAAE,iBAAiB,EAAE,CAAC;IAC9B,WAAW,EAAE,MAAM,EAAE,CAAC;IACtB,OAAO,EAAE,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,CAAC;CAC9B;AAED,qBAAa,sBAAsB;IAIjC,MAAM,CAAC,aAAa,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAqE1D,OAAO,CAAC,MAAM,CAAC,wBAAwB;IAkDvC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IAsBzC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA4BzC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA2CzC,MAAM,CAAC,oBAAoB,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAiDjE,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA0BzC,OAAO,CAAC,MAAM,CAAC,wBAAwB;IAkBvC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IAsBzC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA4BzC,OAAO,CAAC,MAAM,CAAC,yBAAyB;IAwCxC,MAAM,CAAC,cAAc,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAwF3D,MAAM,CAAC,eAAe,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAyG5D,MAAM,CAAC,gBAAgB,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAkI7D,MAAM,CAAC,eAAe,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAmG5D,MAAM,CAAC,aAAa,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IA6F1D,OAAO,CAAC,MAAM,CAAC,gBAAgB;IAkF/B,MAAM,CAAC,mBAAmB,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAiGhE,MAAM,CAAC,eAAe,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IA6D5D,MAAM,CAAC,YAAY,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IA8DzD,OAAO,CAAC,MAAM,CAAC,sBAAsB;IAuDrC,OAAO,CAAC,MAAM,CAAC,kBAAkB;IAuDjC,OAAO,CAAC,MAAM,CAAC,uBAAuB;IAsFtC,OAAO,CAAC,MAAM,CAAC,oBAAoB;IAuKnC,OAAO,CAAC,MAAM,CAAC,oBAAoB;IA2EnC,MAAM,CAAC,WAAW,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;CAoDzD"}
+{"version":3,"file":"node-specific-validators.d.ts","sourceRoot":"","sources":["../../src/services/node-specific-validators.ts"],"names":[],"mappings":"AAOA,OAAO,EAAE,eAAe,EAAE,iBAAiB,EAAE,MAAM,oBAAoB,CAAC;AAExE,MAAM,WAAW,qBAAqB;IACpC,MAAM,EAAE,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,CAAC;IAC5B,MAAM,EAAE,eAAe,EAAE,CAAC;IAC1B,QAAQ,EAAE,iBAAiB,EAAE,CAAC;IAC9B,WAAW,EAAE,MAAM,EAAE,CAAC;IACtB,OAAO,EAAE,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,CAAC;CAC9B;AAED,qBAAa,sBAAsB;IAIjC,MAAM,CAAC,aAAa,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAqE1D,OAAO,CAAC,MAAM,CAAC,wBAAwB;IAkDvC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IAsBzC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA4BzC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA2CzC,MAAM,CAAC,oBAAoB,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAiDjE,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA0BzC,OAAO,CAAC,MAAM,CAAC,wBAAwB;IAkBvC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IAsBzC,OAAO,CAAC,MAAM,CAAC,0BAA0B;IA4BzC,OAAO,CAAC,MAAM,CAAC,yBAAyB;IAwCxC,MAAM,CAAC,cAAc,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAwF3D,MAAM,CAAC,eAAe,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAyG5D,MAAM,CAAC,gBAAgB,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAkI7D,MAAM,CAAC,eAAe,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAmG5D,MAAM,CAAC,aAAa,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IA6F1D,OAAO,CAAC,MAAM,CAAC,gBAAgB;IAkF/B,MAAM,CAAC,mBAAmB,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IAiGhE,MAAM,CAAC,eAAe,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IA6D5D,MAAM,CAAC,YAAY,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;IA8DzD,OAAO,CAAC,MAAM,CAAC,sBAAsB;IAuDrC,OAAO,CAAC,MAAM,CAAC,kBAAkB;IAuDjC,OAAO,CAAC,MAAM,CAAC,uBAAuB;IAyFtC,OAAO,CAAC,MAAM,CAAC,oBAAoB;IAuKnC,OAAO,CAAC,MAAM,CAAC,oBAAoB;IA2EnC,MAAM,CAAC,WAAW,CAAC,OAAO,EAAE,qBAAqB,GAAG,IAAI;CAoDzD"}

dist/services/node-specific-validators.js

@@ -1067,7 +1067,8 @@ class NodeSpecificValidators {
                     fix: 'Wrap in array: return [{json: yourObject}]'
                 });
             }
-            if (/return\s+(true|false|null|undefined|\d+|['"`])/m.test(code)) {
+            const hasHelperFunctions = /(?:function\s+\w+\s*\(|(?:const|let|var)\s+\w+\s*=\s*(?:async\s+)?(?:function|\([^)]*\)\s*=>|\w+\s*=>))/.test(code);
+            if (!hasHelperFunctions && /return\s+(true|false|null|undefined|\d+|['"`])/m.test(code)) {
                 errors.push({
                     type: 'invalid_value',
                     property: 'jsCode',
@@ -1149,7 +1150,7 @@ class NodeSpecificValidators {
             }
         });
         if (language === 'javaScript') {
-            if (/\$(?![a-zA-Z])/.test(code) && !code.includes('${')) {
+            if (/\$(?![a-zA-Z_(])/.test(code) && !code.includes('${')) {
                 warnings.push({
                     type: 'best_practice',
                     message: 'Invalid $ usage detected',

dist/services/workflow-auto-fixer.d.ts.map

@@ -1 +1 @@
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+{"version":3,"file":"workflow-auto-fixer.d.ts","sourceRoot":"","sources":["../../src/services/workflow-auto-fixer.ts"],"names":[],"mappings":"AAQA,OAAO,EAAE,wBAAwB,EAA0B,MAAM,sBAAsB,CAAC;AACxF,OAAO,EAAE,qBAAqB,EAAE,MAAM,+BAA+B,CAAC;AAEtE,OAAO,EAAE,cAAc,EAAE,MAAM,6BAA6B,CAAC;AAC7D,OAAO,EACL,qBAAqB,EAGtB,MAAM,wBAAwB,CAAC;AAChC,OAAO,EAAgB,QAAQ,EAAE,MAAM,kBAAkB,CAAC;AAK1D,OAAO,EAAuB,kBAAkB,EAAE,MAAM,yBAAyB,CAAC;AAIlF,MAAM,MAAM,kBAAkB,GAAG,MAAM,GAAG,QAAQ,GAAG,KAAK,CAAC;AAC3D,MAAM,MAAM,OAAO,GACf,mBAAmB,GACnB,wBAAwB,GACxB,qBAAqB,GACrB,sBAAsB,GACtB,sBAAsB,GACtB,qBAAqB,GACrB,mBAAmB,GACnB,yBAAyB,GACzB,yBAAyB,GACzB,yBAAyB,GACzB,uBAAuB,GACvB,8BAA8B,GAC9B,wBAAwB,CAAC;AAE7B,eAAO,MAAM,oBAAoB,EAAE,OAAO,EAMzC,CAAC;AAEF,MAAM,WAAW,aAAa;IAC5B,UAAU,EAAE,OAAO,CAAC;IACpB,QAAQ,CAAC,EAAE,OAAO,EAAE,CAAC;IACrB,mBAAmB,CAAC,EAAE,kBAAkB,CAAC;IACzC,QAAQ,CAAC,EAAE,MAAM,CAAC;CACnB;AAED,MAAM,WAAW,YAAY;IAC3B,IAAI,EAAE,MAAM,CAAC;IACb,KAAK,EAAE,MAAM,CAAC;IACd,IAAI,EAAE,OAAO,CAAC;IACd,MAAM,EAAE,GAAG,CAAC;IACZ,KAAK,EAAE,GAAG,CAAC;IACX,UAAU,EAAE,kBAAkB,CAAC;IAC/B,WAAW,EAAE,MAAM,CAAC;CACrB;AAED,MAAM,WAAW,aAAa;IAC5B,UAAU,EAAE,qBAAqB,EAAE,CAAC;IACpC,KAAK,EAAE,YAAY,EAAE,CAAC;IACtB,OAAO,EAAE,MAAM,CAAC;IAChB,KAAK,EAAE;QACL,KAAK,EAAE,MAAM,CAAC;QACd,MAAM,EAAE,MAAM,CAAC,OAAO,EAAE,MAAM,CAAC,CAAC;QAChC,YAAY,EAAE,MAAM,CAAC,kBAAkB,EAAE,MAAM,CAAC,CAAC;KAClD,CAAC;IACF,kBAAkB,CAAC,EAAE,kBAAkB,EAAE,CAAC;CAC3C;AAED,MAAM,WAAW,eAAgB,SAAQ,qBAAqB;IAC5D,QAAQ,EAAE,MAAM,CAAC;IACjB,MAAM,EAAE,MAAM,CAAC;CAChB;AAKD,wBAAgB,iBAAiB,CAAC,KAAK,EAAE,qBAAqB,GAAG,KAAK,IAAI,eAAe,CAIxF;AAKD,MAAM,WAAW,aAAa;IAC5B,IAAI,EAAE,OAAO,CAAC;IACd,MAAM,CAAC,EAAE,MAAM,CAAC;IAChB,QAAQ,CAAC,EAAE,MAAM,CAAC;IAClB,OAAO,EAAE,MAAM,CAAC;IAChB,WAAW,CAAC,EAAE,KAAK,CAAC;QAClB,QAAQ,EAAE,MAAM,CAAC;QACjB,UAAU,EAAE,MAAM,CAAC;QACnB,MAAM,EAAE,MAAM,CAAC;KAChB,CAAC,CAAC;CACJ;AAED,qBAAa,iBAAiB;IAC5B,OAAO,CAAC,QAAQ,CAAC,aAAa,CAI5B;IACF,OAAO,CAAC,iBAAiB,CAAsC;IAC/D,OAAO,CAAC,cAAc,CAAmC;IACzD,OAAO,CAAC,sBAAsB,CAAuC;IACrE,OAAO,CAAC,gBAAgB,CAAqC;IAC7D,OAAO,CAAC,mBAAmB,CAAoC;gBAEnD,UAAU,CAAC,EAAE,cAAc;IAajC,aAAa,CACjB,QAAQ,EAAE,QAAQ,EAClB,gBAAgB,EAAE,wBAAwB,EAC1C,YAAY,GAAE,qBAAqB,EAAO,EAC1C,MAAM,GAAE,OAAO,CAAC,aAAa,CAAM,GAClC,OAAO,CAAC,aAAa,CAAC;IAgFzB,OAAO,CAAC,4BAA4B;IAqEpC,OAAO,CAAC,uBAAuB;IA8C/B,OAAO,CAAC,uBAAuB;IA0C/B,OAAO,CAAC,oBAAoB;IAkD5B,OAAO,CAAC,uBAAuB;IAwE/B,OAAO,CAAC,uBAAuB;IAsD/B,OAAO,CAAC,cAAc;IAmGtB,OAAO,CAAC,kBAAkB;IAkB1B,OAAO,CAAC,uBAAuB;IAuB/B,OAAO,CAAC,cAAc;IAoCtB,OAAO,CAAC,eAAe;IAwDvB,OAAO,CAAC,sBAAsB;IAgF9B,OAAO,CAAC,cAAc;IA+DtB,OAAO,CAAC,WAAW;IA6EnB,OAAO,CAAC,eAAe;IAqCvB,OAAO,CAAC,eAAe;IA4DvB,OAAO,CAAC,uBAAuB;YA6CjB,0BAA0B;YAoF1B,4BAA4B;CAiF3C"}

dist/services/workflow-auto-fixer.js

@@ -405,7 +405,7 @@ class WorkflowAutoFixer {
         const hasConnectionFixes = filteredFixes.some(f => exports.CONNECTION_FIX_TYPES.includes(f.type));
         return operations.filter(op => {
             if (op.type === 'updateNode') {
-                return fixedNodes.has(op.nodeId || '');
+                return fixedNodes.has(op.nodeName || '') || fixedNodes.has(op.nodeId || '');
             }
             if (op.type === 'replaceConnections') {
                 return hasConnectionFixes;
@@ -794,6 +794,7 @@ class WorkflowAutoFixer {
                 const operation = {
                     type: 'updateNode',
                     nodeId: node.id,
+                    nodeName: node.name,
                     updates: {
                         typeVersion: parseFloat(latestVersion),
                         parameters: migrationResult.updatedNode.parameters,

dist/services/workflow-diff-engine.d.ts

@@ -3,6 +3,11 @@ import { Workflow } from '../types/n8n-api';
 export declare class WorkflowDiffEngine {
     private renameMap;
     private warnings;
+    private modifiedNodeIds;
+    private removedNodeNames;
+    private tagsToAdd;
+    private tagsToRemove;
+    private transferToProjectId;
     applyDiff(workflow: Workflow, request: WorkflowDiffRequest): Promise<WorkflowDiffResult>;
     private validateOperation;
     private applyOperation;
@@ -32,6 +37,8 @@ export declare class WorkflowDiffEngine {
     private validateDeactivateWorkflow;
     private applyActivateWorkflow;
     private applyDeactivateWorkflow;
+    private validateTransferWorkflow;
+    private applyTransferWorkflow;
     private validateCleanStaleConnections;
     private validateReplaceConnections;
     private applyCleanStaleConnections;

dist/services/workflow-diff-engine.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"workflow-diff-engine.d.ts","sourceRoot":"","sources":["../../src/services/workflow-diff-engine.ts"],"names":[],"mappings":"AAMA,OAAO,EAEL,mBAAmB,EACnB,kBAAkB,EAsBnB,MAAM,wBAAwB,CAAC;AAChC,OAAO,EAAE,QAAQ,EAAoC,MAAM,kBAAkB,CAAC;AAQ9E,qBAAa,kBAAkB;IAE7B,OAAO,CAAC,SAAS,CAAkC;IAEnD,OAAO,CAAC,QAAQ,CAAqC;IAK/C,SAAS,CACb,QAAQ,EAAE,QAAQ,EAClB,OAAO,EAAE,mBAAmB,GAC3B,OAAO,CAAC,kBAAkB,CAAC;IA0M9B,OAAO,CAAC,iBAAiB;IAwCzB,OAAO,CAAC,cAAc;IAyDtB,OAAO,CAAC,eAAe;IAwBvB,OAAO,CAAC,kBAAkB;IAuB1B,OAAO,CAAC,kBAAkB;IAoC1B,OAAO,CAAC,gBAAgB;IAQxB,OAAO,CAAC,kBAAkB;IAU1B,OAAO,CAAC,qBAAqB;IAkD7B,OAAO,CAAC,wBAAwB;IAuChC,OAAO,CAAC,wBAAwB;IAmDhC,OAAO,CAAC,YAAY;IA2BpB,OAAO,CAAC,eAAe;IAkCvB,OAAO,CAAC,eAAe;IAwBvB,OAAO,CAAC,aAAa;IAOrB,OAAO,CAAC,eAAe;IAOvB,OAAO,CAAC,gBAAgB;IAWxB,OAAO,CAAC,sBAAsB;IAgD9B,OAAO,CAAC,kBAAkB;IA4C1B,OAAO,CAAC,qBAAqB;IA2C7B,OAAO,CAAC,qBAAqB;IA0B7B,OAAO,CAAC,mBAAmB;IAW3B,OAAO,CAAC,eAAe;IAIvB,OAAO,CAAC,WAAW;IASnB,OAAO,CAAC,cAAc;IAUtB,OAAO,CAAC,wBAAwB;IAchC,OAAO,CAAC,0BAA0B;IAMlC,OAAO,CAAC,qBAAqB;IAM7B,OAAO,CAAC,uBAAuB;IAO/B,OAAO,CAAC,6BAA6B;IAKrC,OAAO,CAAC,0BAA0B;IA0BlC,OAAO,CAAC,0BAA0B;IA0ElC,OAAO,CAAC,uBAAuB;IAe/B,OAAO,CAAC,0BAA0B;IAkElC,OAAO,CAAC,iBAAiB;IAkBzB,OAAO,CAAC,QAAQ;IAsChB,OAAO,CAAC,uBAAuB;IAW/B,OAAO,CAAC,iBAAiB;CAc1B"}
+{"version":3,"file":"workflow-diff-engine.d.ts","sourceRoot":"","sources":["../../src/services/workflow-diff-engine.ts"],"names":[],"mappings":"AAMA,OAAO,EAEL,mBAAmB,EACnB,kBAAkB,EAuBnB,MAAM,wBAAwB,CAAC;AAChC,OAAO,EAAE,QAAQ,EAAoC,MAAM,kBAAkB,CAAC;AAY9E,qBAAa,kBAAkB;IAE7B,OAAO,CAAC,SAAS,CAAkC;IAEnD,OAAO,CAAC,QAAQ,CAAqC;IAErD,OAAO,CAAC,eAAe,CAAqB;IAE5C,OAAO,CAAC,gBAAgB,CAAqB;IAE7C,OAAO,CAAC,SAAS,CAAgB;IACjC,OAAO,CAAC,YAAY,CAAgB;IAEpC,OAAO,CAAC,mBAAmB,CAAqB;IAK1C,SAAS,CACb,QAAQ,EAAE,QAAQ,EAClB,OAAO,EAAE,mBAAmB,GAC3B,OAAO,CAAC,kBAAkB,CAAC;IAgO9B,OAAO,CAAC,iBAAiB;IA0CzB,OAAO,CAAC,cAAc;IA4DtB,OAAO,CAAC,eAAe;IAwBvB,OAAO,CAAC,kBAAkB;IAuB1B,OAAO,CAAC,kBAAkB;IAoC1B,OAAO,CAAC,gBAAgB;IAQxB,OAAO,CAAC,kBAAkB;IAU1B,OAAO,CAAC,qBAAqB;IAkD7B,OAAO,CAAC,wBAAwB;IA6ChC,OAAO,CAAC,wBAAwB;IAmDhC,OAAO,CAAC,YAAY;IA4BpB,OAAO,CAAC,eAAe;IAwCvB,OAAO,CAAC,eAAe;IA0BvB,OAAO,CAAC,aAAa;IAOrB,OAAO,CAAC,eAAe;IAOvB,OAAO,CAAC,gBAAgB;IAWxB,OAAO,CAAC,sBAAsB;IAwD9B,OAAO,CAAC,kBAAkB;IA6C1B,OAAO,CAAC,qBAAqB;IAuC7B,OAAO,CAAC,qBAAqB;IA0B7B,OAAO,CAAC,mBAAmB;IAW3B,OAAO,CAAC,eAAe;IAIvB,OAAO,CAAC,WAAW;IAYnB,OAAO,CAAC,cAAc;IAatB,OAAO,CAAC,wBAAwB;IAchC,OAAO,CAAC,0BAA0B;IAMlC,OAAO,CAAC,qBAAqB;IAM7B,OAAO,CAAC,uBAAuB;IAO/B,OAAO,CAAC,wBAAwB;IAOhC,OAAO,CAAC,qBAAqB;IAK7B,OAAO,CAAC,6BAA6B;IAKrC,OAAO,CAAC,0BAA0B;IA0BlC,OAAO,CAAC,0BAA0B;IA+ElC,OAAO,CAAC,uBAAuB;IAe/B,OAAO,CAAC,0BAA0B;IAmElC,OAAO,CAAC,iBAAiB;IAkBzB,OAAO,CAAC,QAAQ;IAsChB,OAAO,CAAC,uBAAuB;IAW/B,OAAO,CAAC,iBAAiB;CAoB1B"}

dist/services/workflow-diff-engine.js

@@ -10,11 +10,20 @@ class WorkflowDiffEngine {
     constructor() {
         this.renameMap = new Map();
         this.warnings = [];
+        this.modifiedNodeIds = new Set();
+        this.removedNodeNames = new Set();
+        this.tagsToAdd = [];
+        this.tagsToRemove = [];
     }
     async applyDiff(workflow, request) {
         try {
             this.renameMap.clear();
             this.warnings = [];
+            this.modifiedNodeIds.clear();
+            this.removedNodeNames.clear();
+            this.tagsToAdd = [];
+            this.tagsToRemove = [];
+            this.transferToProjectId = undefined;
             const workflowCopy = JSON.parse(JSON.stringify(workflow));
             const nodeOperationTypes = ['addNode', 'removeNode', 'updateNode', 'moveNode', 'enableNode', 'disableNode'];
             const nodeOperations = [];
@@ -73,6 +82,10 @@ class WorkflowDiffEngine {
                         failed: failedIndices
                     };
                 }
+                const shouldActivate = workflowCopy._shouldActivate === true;
+                const shouldDeactivate = workflowCopy._shouldDeactivate === true;
+                delete workflowCopy._shouldActivate;
+                delete workflowCopy._shouldDeactivate;
                 const success = appliedIndices.length > 0;
                 return {
                     success,
@@ -82,7 +95,12 @@ class WorkflowDiffEngine {
                     errors: errors.length > 0 ? errors : undefined,
                     warnings: this.warnings.length > 0 ? this.warnings : undefined,
                     applied: appliedIndices,
-                    failed: failedIndices
+                    failed: failedIndices,
+                    shouldActivate: shouldActivate || undefined,
+                    shouldDeactivate: shouldDeactivate || undefined,
+                    tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
+                    tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+                    transferToProjectId: this.transferToProjectId || undefined
                 };
             }
             else {
@@ -142,8 +160,15 @@ class WorkflowDiffEngine {
                         };
                     }
                 }
-                workflowCopy.nodes = workflowCopy.nodes.map((node) => (0, node_sanitizer_1.sanitizeNode)(node));
-                logger.debug('Applied full-workflow sanitization to all nodes');
+                if (this.modifiedNodeIds.size > 0) {
+                    workflowCopy.nodes = workflowCopy.nodes.map((node) => {
+                        if (this.modifiedNodeIds.has(node.id)) {
+                            return (0, node_sanitizer_1.sanitizeNode)(node);
+                        }
+                        return node;
+                    });
+                    logger.debug(`Sanitized ${this.modifiedNodeIds.size} modified nodes`);
+                }
                 if (request.validateOnly) {
                     return {
                         success: true,
@@ -162,7 +187,10 @@ class WorkflowDiffEngine {
                     message: `Successfully applied ${operationsApplied} operations (${nodeOperations.length} node ops, ${otherOperations.length} other ops)`,
                     warnings: this.warnings.length > 0 ? this.warnings : undefined,
                     shouldActivate: shouldActivate || undefined,
-                    shouldDeactivate: shouldDeactivate || undefined
+                    shouldDeactivate: shouldDeactivate || undefined,
+                    tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
+                    tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+                    transferToProjectId: this.transferToProjectId || undefined
                 };
             }
         }
@@ -201,6 +229,8 @@ class WorkflowDiffEngine {
             case 'addTag':
             case 'removeTag':
                 return null;
+            case 'transferWorkflow':
+                return this.validateTransferWorkflow(workflow, operation);
             case 'activateWorkflow':
                 return this.validateActivateWorkflow(workflow, operation);
             case 'deactivateWorkflow':
@@ -266,6 +296,9 @@ class WorkflowDiffEngine {
             case 'replaceConnections':
                 this.applyReplaceConnections(workflow, operation);
                 break;
+            case 'transferWorkflow':
+                this.applyTransferWorkflow(workflow, operation);
+                break;
         }
     }
     validateAddNode(workflow, operation) {
@@ -302,7 +335,7 @@ class WorkflowDiffEngine {
             return `Invalid parameter 'changes'. The updateNode operation requires 'updates' (not 'changes'). Example: {type: "updateNode", nodeId: "abc", updates: {name: "New Name", "parameters.url": "https://example.com"}}`;
         }
         if (!operation.updates) {
-            return `Missing required parameter 'updates'. The updateNode operation requires an 'updates' object containing properties to modify. Example: {type: "updateNode", nodeId: "abc", updates: {name: "New Name"}}`;
+            return `Missing required parameter 'updates'. The updateNode operation requires an 'updates' object. Correct structure: {type: "updateNode", nodeId: "abc-123" OR nodeName: "My Node", updates: {name: "New Name", "parameters.url": "https://example.com"}}`;
         }
         const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
         if (!node) {
@@ -382,12 +415,18 @@ class WorkflowDiffEngine {
         const sourceNode = this.findNode(workflow, operation.source, operation.source);
         const targetNode = this.findNode(workflow, operation.target, operation.target);
         if (!sourceNode) {
+            if (this.removedNodeNames.has(operation.source)) {
+                return `Source node "${operation.source}" was already removed by a prior removeNode operation. Its connections were automatically cleaned up — no separate removeConnection needed.`;
+            }
             const availableNodes = workflow.nodes
                 .map(n => `"${n.name}" (id: ${n.id.substring(0, 8)}...)`)
                 .join(', ');
             return `Source node not found: "${operation.source}". Available nodes: ${availableNodes}. Tip: Use node ID for names with special characters.`;
         }
         if (!targetNode) {
+            if (this.removedNodeNames.has(operation.target)) {
+                return `Target node "${operation.target}" was already removed by a prior removeNode operation. Its connections were automatically cleaned up — no separate removeConnection needed.`;
+            }
             const availableNodes = workflow.nodes
                 .map(n => `"${n.name}" (id: ${n.id.substring(0, 8)}...)`)
                 .join(', ');
@@ -461,34 +500,40 @@ class WorkflowDiffEngine {
             executeOnce: operation.node.executeOnce
         };
         const sanitizedNode = (0, node_sanitizer_1.sanitizeNode)(newNode);
+        this.modifiedNodeIds.add(sanitizedNode.id);
         workflow.nodes.push(sanitizedNode);
     }
     applyRemoveNode(workflow, operation) {
         const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
         if (!node)
             return;
+        this.removedNodeNames.add(node.name);
         const index = workflow.nodes.findIndex(n => n.id === node.id);
         if (index !== -1) {
             workflow.nodes.splice(index, 1);
         }
         delete workflow.connections[node.name];
-        Object.keys(workflow.connections).forEach(sourceName => {
-            const sourceConnections = workflow.connections[sourceName];
-            Object.keys(sourceConnections).forEach(outputName => {
-                sourceConnections[outputName] = sourceConnections[outputName].map(connections => connections.filter(conn => conn.node !== node.name)).filter(connections => connections.length > 0);
-                if (sourceConnections[outputName].length === 0) {
+        for (const [sourceName, sourceConnections] of Object.entries(workflow.connections)) {
+            for (const [outputName, outputConns] of Object.entries(sourceConnections)) {
+                sourceConnections[outputName] = outputConns.map(connections => connections.filter(conn => conn.node !== node.name));
+                const trimmed = sourceConnections[outputName];
+                while (trimmed.length > 0 && trimmed[trimmed.length - 1].length === 0) {
+                    trimmed.pop();
+                }
+                if (trimmed.length === 0) {
                     delete sourceConnections[outputName];
                 }
-            });
+            }
             if (Object.keys(sourceConnections).length === 0) {
                 delete workflow.connections[sourceName];
             }
-        });
+        }
     }
     applyUpdateNode(workflow, operation) {
         const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
         if (!node)
             return;
+        this.modifiedNodeIds.add(node.id);
         if (operation.updates.name && operation.updates.name !== node.name) {
             const oldName = node.name;
             const newName = operation.updates.name;
@@ -521,8 +566,13 @@ class WorkflowDiffEngine {
     }
     resolveSmartParameters(workflow, operation) {
         const sourceNode = this.findNode(workflow, operation.source, operation.source);
-        let sourceOutput = operation.sourceOutput ?? 'main';
+        let sourceOutput = String(operation.sourceOutput ?? 'main');
         let sourceIndex = operation.sourceIndex ?? 0;
+        if (/^\d+$/.test(sourceOutput) && operation.sourceIndex === undefined
+            && operation.branch === undefined && operation.case === undefined) {
+            sourceIndex = parseInt(sourceOutput, 10);
+            sourceOutput = 'main';
+        }
         if (operation.branch !== undefined && operation.sourceIndex === undefined) {
             if (sourceNode?.type === 'n8n-nodes-base.if') {
                 sourceIndex = operation.branch === 'true' ? 0 : 1;
@@ -556,7 +606,7 @@ class WorkflowDiffEngine {
         if (!sourceNode || !targetNode)
             return;
         const { sourceOutput, sourceIndex } = this.resolveSmartParameters(workflow, operation);
-        const targetInput = operation.targetInput ?? sourceOutput;
+        const targetInput = String(operation.targetInput ?? sourceOutput);
         const targetIndex = operation.targetIndex ?? 0;
         if (!workflow.connections[sourceNode.name]) {
             workflow.connections[sourceNode.name] = {};
@@ -581,12 +631,9 @@ class WorkflowDiffEngine {
         const sourceNode = this.findNode(workflow, operation.source, operation.source);
         const targetNode = this.findNode(workflow, operation.target, operation.target);
         if (!sourceNode || !targetNode) {
-            if (operation.ignoreErrors) {
-                return;
-            }
             return;
         }
-        const sourceOutput = operation.sourceOutput || 'main';
+        const sourceOutput = String(operation.sourceOutput ?? 'main');
         const connections = workflow.connections[sourceNode.name]?.[sourceOutput];
         if (!connections)
             return;
@@ -633,19 +680,21 @@ class WorkflowDiffEngine {
         workflow.name = operation.name;
     }
     applyAddTag(workflow, operation) {
-        if (!workflow.tags) {
-            workflow.tags = [];
+        const removeIdx = this.tagsToRemove.indexOf(operation.tag);
+        if (removeIdx !== -1) {
+            this.tagsToRemove.splice(removeIdx, 1);
         }
-        if (!workflow.tags.includes(operation.tag)) {
-            workflow.tags.push(operation.tag);
+        if (!this.tagsToAdd.includes(operation.tag)) {
+            this.tagsToAdd.push(operation.tag);
         }
     }
     applyRemoveTag(workflow, operation) {
-        if (!workflow.tags)
-            return;
-        const index = workflow.tags.indexOf(operation.tag);
-        if (index !== -1) {
-            workflow.tags.splice(index, 1);
+        const addIdx = this.tagsToAdd.indexOf(operation.tag);
+        if (addIdx !== -1) {
+            this.tagsToAdd.splice(addIdx, 1);
+        }
+        if (!this.tagsToRemove.includes(operation.tag)) {
+            this.tagsToRemove.push(operation.tag);
         }
     }
     validateActivateWorkflow(workflow, operation) {
@@ -664,6 +713,15 @@ class WorkflowDiffEngine {
     applyDeactivateWorkflow(workflow, operation) {
         workflow._shouldDeactivate = true;
     }
+    validateTransferWorkflow(_workflow, operation) {
+        if (!operation.destinationProjectId) {
+            return 'transferWorkflow requires a non-empty destinationProjectId string';
+        }
+        return null;
+    }
+    applyTransferWorkflow(_workflow, operation) {
+        this.transferToProjectId = operation.destinationProjectId;
+    }
     validateCleanStaleConnections(workflow, operation) {
         return null;
     }
@@ -734,7 +792,10 @@ class WorkflowDiffEngine {
                         return false;
                     }
                     return true;
-                })).filter(conns => conns.length > 0);
+                }));
+                while (filteredConnections.length > 0 && filteredConnections[filteredConnections.length - 1].length === 0) {
+                    filteredConnections.pop();
+                }
                 if (filteredConnections.length === 0) {
                     delete outputs[outputName];
                 }
@@ -768,9 +829,10 @@ class WorkflowDiffEngine {
                     for (let connIndex = 0; connIndex < connectionsAtIndex.length; connIndex++) {
                         const connection = connectionsAtIndex[connIndex];
                         if (renames.has(connection.node)) {
+                            const oldTargetName = connection.node;
                             const newTargetName = renames.get(connection.node);
                             connection.node = newTargetName;
-                            logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${connection.node}" → "${newTargetName}"`);
+                            logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${oldTargetName}" → "${newTargetName}"`);
                         }
                     }
                 }
@@ -818,12 +880,20 @@ class WorkflowDiffEngine {
         let current = obj;
         for (let i = 0; i < keys.length - 1; i++) {
             const key = keys[i];
-            if (!(key in current) || typeof current[key] !== 'object') {
+            if (!(key in current) || typeof current[key] !== 'object' || current[key] === null) {
+                if (value === null)
+                    return;
                 current[key] = {};
             }
             current = current[key];
         }
-        current[keys[keys.length - 1]] = value;
+        const finalKey = keys[keys.length - 1];
+        if (value === null) {
+            delete current[finalKey];
+        }
+        else {
+            current[finalKey] = value;
+        }
     }
 }
 exports.WorkflowDiffEngine = WorkflowDiffEngine;

dist/types/n8n-api.d.ts

@@ -259,6 +259,7 @@ export interface WebhookRequest {
 }
 export interface McpToolResponse {
     success: boolean;
+    saved?: boolean;
     data?: unknown;
     error?: string;
     message?: string;
@@ -266,6 +267,7 @@ export interface McpToolResponse {
     details?: Record<string, unknown>;
     executionId?: string;
     workflowId?: string;
+    operationsApplied?: number;
 }
 export type ExecutionMode = 'preview' | 'summary' | 'filtered' | 'full' | 'error';
 export interface ExecutionPreview {

dist/types/workflow-diff.d.ts

@@ -94,6 +94,10 @@ export interface ActivateWorkflowOperation extends DiffOperation {
 export interface DeactivateWorkflowOperation extends DiffOperation {
     type: 'deactivateWorkflow';
 }
+export interface TransferWorkflowOperation extends DiffOperation {
+    type: 'transferWorkflow';
+    destinationProjectId: string;
+}
 export interface CleanStaleConnectionsOperation extends DiffOperation {
     type: 'cleanStaleConnections';
     dryRun?: boolean;
@@ -110,7 +114,7 @@ export interface ReplaceConnectionsOperation extends DiffOperation {
         };
     };
 }
-export type WorkflowDiffOperation = AddNodeOperation | RemoveNodeOperation | UpdateNodeOperation | MoveNodeOperation | EnableNodeOperation | DisableNodeOperation | AddConnectionOperation | RemoveConnectionOperation | RewireConnectionOperation | UpdateSettingsOperation | UpdateNameOperation | AddTagOperation | RemoveTagOperation | ActivateWorkflowOperation | DeactivateWorkflowOperation | CleanStaleConnectionsOperation | ReplaceConnectionsOperation;
+export type WorkflowDiffOperation = AddNodeOperation | RemoveNodeOperation | UpdateNodeOperation | MoveNodeOperation | EnableNodeOperation | DisableNodeOperation | AddConnectionOperation | RemoveConnectionOperation | RewireConnectionOperation | UpdateSettingsOperation | UpdateNameOperation | AddTagOperation | RemoveTagOperation | ActivateWorkflowOperation | DeactivateWorkflowOperation | CleanStaleConnectionsOperation | ReplaceConnectionsOperation | TransferWorkflowOperation;
 export interface WorkflowDiffRequest {
     id: string;
     operations: WorkflowDiffOperation[];
@@ -137,6 +141,9 @@ export interface WorkflowDiffResult {
     }>;
     shouldActivate?: boolean;
     shouldDeactivate?: boolean;
+    tagsToAdd?: string[];
+    tagsToRemove?: string[];
+    transferToProjectId?: string;
 }
 export interface NodeReference {
     id?: string;

dist/types/workflow-diff.d.ts.map

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dist/types/workflow-diff.js.map

@@ -1 +1 @@
-{"version":3,"file":"workflow-diff.js","sourceRoot":"","sources":["../../src/types/workflow-diff.ts"],"names":[],"mappings":";;AAyMA,0CAIC;AAED,sDAGC;AAED,kDAGC;AAdD,SAAgB,eAAe,CAAC,EAAyB;IAGvD,OAAO,CAAC,SAAS,EAAE,YAAY,EAAE,YAAY,EAAE,UAAU,EAAE,YAAY,EAAE,aAAa,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AAC5G,CAAC;AAED,SAAgB,qBAAqB,CAAC,EAAyB;IAE7D,OAAO,CAAC,eAAe,EAAE,kBAAkB,EAAE,kBAAkB,EAAE,uBAAuB,EAAE,oBAAoB,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACpI,CAAC;AAED,SAAgB,mBAAmB,CAAC,EAAyB;IAE3D,OAAO,CAAC,gBAAgB,EAAE,YAAY,EAAE,QAAQ,EAAE,WAAW,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACnF,CAAC"}
+{"version":3,"file":"workflow-diff.js","sourceRoot":"","sources":["../../src/types/workflow-diff.ts"],"names":[],"mappings":";;AAkNA,0CAIC;AAED,sDAGC;AAED,kDAGC;AAdD,SAAgB,eAAe,CAAC,EAAyB;IAGvD,OAAO,CAAC,SAAS,EAAE,YAAY,EAAE,YAAY,EAAE,UAAU,EAAE,YAAY,EAAE,aAAa,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AAC5G,CAAC;AAED,SAAgB,qBAAqB,CAAC,EAAyB;IAE7D,OAAO,CAAC,eAAe,EAAE,kBAAkB,EAAE,kBAAkB,EAAE,uBAAuB,EAAE,oBAAoB,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACpI,CAAC;AAED,SAAgB,mBAAmB,CAAC,EAAyB;IAE3D,OAAO,CAAC,gBAAgB,EAAE,YAAY,EAAE,QAAQ,EAAE,WAAW,CAAC,CAAC,QAAQ,CAAC,EAAE,CAAC,IAAI,CAAC,CAAC;AACnF,CAAC"}

dist/utils/node-type-utils.js

@@ -87,12 +87,10 @@ function isTriggerNode(nodeType) {
     if (lowerType.includes('webhook') && !lowerType.includes('respond')) {
         return true;
     }
-    const specificTriggers = [
-        'nodes-base.start',
-        'nodes-base.manualTrigger',
-        'nodes-base.formTrigger'
-    ];
-    return specificTriggers.includes(normalized);
+    if (lowerType.includes('emailread') || lowerType.includes('emailreadimap')) {
+        return true;
+    }
+    return normalized === 'nodes-base.start';
 }
 function isActivatableTrigger(nodeType) {
     return isTriggerNode(nodeType);

dist/utils/node-type-utils.js.map

@@ -1 +1 @@
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package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.37.1",
+  "version": "2.40.1",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -153,16 +153,16 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.27.1",
-    "@n8n/n8n-nodes-langchain": "^2.11.2",
+    "@n8n/n8n-nodes-langchain": "^2.12.0",
     "@supabase/supabase-js": "^2.57.4",
     "dotenv": "^16.5.0",
     "express": "^5.1.0",
     "express-rate-limit": "^7.1.5",
     "form-data": "^4.0.5",
     "lru-cache": "^11.2.1",
-    "n8n": "^2.11.4",
-    "n8n-core": "^2.11.1",
-    "n8n-workflow": "^2.11.1",
+    "n8n": "^2.12.3",
+    "n8n-core": "^2.12.0",
+    "n8n-workflow": "^2.12.0",
     "openai": "^4.77.0",
     "sql.js": "^1.13.0",
     "tslib": "^2.6.2",

src/mcp/handlers-n8n-manager.ts

@@ -8,7 +8,7 @@ import {
   WebhookRequest,
   McpToolResponse,
   ExecutionFilterOptions,
-  ExecutionMode
+  ExecutionMode,
 } from '../types/n8n-api';
 import type { TriggerType, TestWorkflowInput } from '../triggers/types';
 import {
@@ -383,6 +383,7 @@ const createWorkflowSchema = z.object({
     executionTimeout: z.number().optional(),
     errorWorkflow: z.string().optional(),
   }).optional(),
+  projectId: z.string().optional(),
 });
 
 const updateWorkflowSchema = z.object({
@@ -1974,7 +1975,7 @@ export async function handleDiagnostic(request: any, context?: InstanceContext):
 
   // Check which tools are available
   const documentationTools = 7; // Base documentation tools (after v2.26.0 consolidation)
-  const managementTools = apiConfigured ? 13 : 0; // Management tools requiring API (includes n8n_deploy_template)
+  const managementTools = apiConfigured ? 14 : 0; // Management tools requiring API (includes n8n_manage_datatable)
   const totalTools = documentationTools + managementTools;
 
   // Check npm version
@@ -2688,3 +2689,258 @@ export async function handleTriggerWebhookWorkflow(args: unknown, context?: Inst
     };
   }
 }
+
+// ========================================================================
+// Data Table Handlers
+// ========================================================================
+
+// Shared Zod schemas for data table operations
+const dataTableFilterConditionSchema = z.object({
+  columnName: z.string().min(1),
+  condition: z.enum(['eq', 'neq', 'like', 'ilike', 'gt', 'gte', 'lt', 'lte']),
+  value: z.any(),
+});
+
+const dataTableFilterSchema = z.object({
+  type: z.enum(['and', 'or']).optional().default('and'),
+  filters: z.array(dataTableFilterConditionSchema).min(1, 'At least one filter condition is required'),
+});
+
+// Shared base schema for actions requiring a tableId
+const tableIdSchema = z.object({
+  tableId: z.string().min(1, 'tableId is required'),
+});
+
+// Per-action Zod schemas
+const createTableSchema = z.object({
+  name: z.string().min(1, 'Table name cannot be empty'),
+  columns: z.array(z.object({
+    name: z.string().min(1, 'Column name cannot be empty'),
+    type: z.enum(['string', 'number', 'boolean', 'date']).optional(),
+  })).optional(),
+});
+
+const listTablesSchema = z.object({
+  limit: z.number().min(1).max(100).optional(),
+  cursor: z.string().optional(),
+});
+
+const updateTableSchema = tableIdSchema.extend({
+  name: z.string().min(1, 'New table name cannot be empty'),
+});
+
+// MCP transports may serialize JSON objects/arrays as strings.
+// Parse them back, but return the original value on failure so Zod reports a proper type error.
+function tryParseJson(val: unknown): unknown {
+  if (typeof val !== 'string') return val;
+  try { return JSON.parse(val); } catch { return val; }
+}
+
+const coerceJsonArray = z.preprocess(tryParseJson, z.array(z.record(z.unknown())));
+const coerceJsonObject = z.preprocess(tryParseJson, z.record(z.unknown()));
+const coerceJsonFilter = z.preprocess(tryParseJson, dataTableFilterSchema);
+
+const getRowsSchema = tableIdSchema.extend({
+  limit: z.number().min(1).max(100).optional(),
+  cursor: z.string().optional(),
+  filter: z.union([coerceJsonFilter, z.string()]).optional(),
+  sortBy: z.string().optional(),
+  search: z.string().optional(),
+});
+
+const insertRowsSchema = tableIdSchema.extend({
+  data: coerceJsonArray.pipe(z.array(z.record(z.unknown())).min(1, 'At least one row is required')),
+  returnType: z.enum(['count', 'id', 'all']).optional(),
+});
+
+// Shared schema for update/upsert (identical structure)
+const mutateRowsSchema = tableIdSchema.extend({
+  filter: coerceJsonFilter,
+  data: coerceJsonObject,
+  returnData: z.boolean().optional(),
+  dryRun: z.boolean().optional(),
+});
+
+const deleteRowsSchema = tableIdSchema.extend({
+  filter: coerceJsonFilter,
+  returnData: z.boolean().optional(),
+  dryRun: z.boolean().optional(),
+});
+
+function handleDataTableError(error: unknown): McpToolResponse {
+  if (error instanceof z.ZodError) {
+    return { success: false, error: 'Invalid input', details: { errors: error.errors } };
+  }
+  if (error instanceof N8nApiError) {
+    return {
+      success: false,
+      error: getUserFriendlyErrorMessage(error),
+      code: error.code,
+      details: error.details as Record<string, unknown> | undefined,
+    };
+  }
+  return { success: false, error: error instanceof Error ? error.message : 'Unknown error occurred' };
+}
+
+export async function handleCreateTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const input = createTableSchema.parse(args);
+    const dataTable = await client.createDataTable(input);
+    if (!dataTable || !dataTable.id) {
+      return { success: false, error: 'Data table creation failed: n8n API returned an empty or invalid response' };
+    }
+    return {
+      success: true,
+      data: { id: dataTable.id, name: dataTable.name },
+      message: `Data table "${dataTable.name}" created with ID: ${dataTable.id}`,
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleListTables(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const input = listTablesSchema.parse(args || {});
+    const result = await client.listDataTables(input);
+    return {
+      success: true,
+      data: {
+        tables: result.data,
+        count: result.data.length,
+        nextCursor: result.nextCursor || undefined,
+      },
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleGetTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId } = tableIdSchema.parse(args);
+    const dataTable = await client.getDataTable(tableId);
+    return { success: true, data: dataTable };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleUpdateTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, name } = updateTableSchema.parse(args);
+    const dataTable = await client.updateDataTable(tableId, { name });
+    return {
+      success: true,
+      data: dataTable,
+      message: `Data table renamed to "${dataTable.name}"`,
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleDeleteTable(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId } = tableIdSchema.parse(args);
+    await client.deleteDataTable(tableId);
+    return { success: true, message: `Data table ${tableId} deleted successfully` };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleGetRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, filter, sortBy, ...params } = getRowsSchema.parse(args);
+    const queryParams: Record<string, unknown> = { ...params };
+    if (filter) {
+      const filterStr = typeof filter === 'string' ? filter : JSON.stringify(filter);
+      queryParams.filter = encodeURIComponent(filterStr);
+    }
+    if (sortBy) {
+      queryParams.sortBy = encodeURIComponent(sortBy);
+    }
+    const result = await client.getDataTableRows(tableId, queryParams as any);
+    return {
+      success: true,
+      data: {
+        rows: result.data,
+        count: result.data.length,
+        nextCursor: result.nextCursor || undefined,
+      },
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleInsertRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, ...params } = insertRowsSchema.parse(args);
+    const result = await client.insertDataTableRows(tableId, params);
+    return {
+      success: true,
+      data: result,
+      message: `Rows inserted into data table ${tableId}`,
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleUpdateRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, ...params } = mutateRowsSchema.parse(args);
+    const result = await client.updateDataTableRows(tableId, params);
+    return {
+      success: true,
+      data: result,
+      message: params.dryRun ? 'Dry run: rows matched (no changes applied)' : 'Rows updated successfully',
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleUpsertRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, ...params } = mutateRowsSchema.parse(args);
+    const result = await client.upsertDataTableRow(tableId, params);
+    return {
+      success: true,
+      data: result,
+      message: params.dryRun ? 'Dry run: upsert previewed (no changes applied)' : 'Row upserted successfully',
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}
+
+export async function handleDeleteRows(args: unknown, context?: InstanceContext): Promise<McpToolResponse> {
+  try {
+    const client = ensureApiConfigured(context);
+    const { tableId, filter, ...params } = deleteRowsSchema.parse(args);
+    const queryParams = {
+      filter: encodeURIComponent(JSON.stringify(filter)),
+      ...params,
+    };
+    const result = await client.deleteDataTableRows(tableId, queryParams as any);
+    return {
+      success: true,
+      data: result,
+      message: params.dryRun ? 'Dry run: rows matched for deletion (no changes applied)' : 'Rows deleted successfully',
+    };
+  } catch (error) {
+    return handleDataTableError(error);
+  }
+}

src/mcp/handlers-workflow-diff.ts

@@ -31,6 +31,11 @@ function getValidator(repository: NodeRepository): WorkflowValidator {
   return cachedValidator;
 }
 
+// Operation types that identify nodes by nodeId/nodeName
+const NODE_TARGETING_OPERATIONS = new Set([
+  'updateNode', 'removeNode', 'moveNode', 'enableNode', 'disableNode'
+]);
+
 // Zod schema for the diff request
 const workflowDiffSchema = z.object({
   id: z.string(),
@@ -63,6 +68,25 @@ const workflowDiffSchema = z.object({
     settings: z.any().optional(),
     name: z.string().optional(),
     tag: z.string().optional(),
+    // Transfer operation
+    destinationProjectId: z.string().min(1).optional(),
+    // Aliases: LLMs often use "id" instead of "nodeId" — accept both
+    id: z.string().optional(),
+  }).transform((op) => {
+    // Normalize common field aliases for node-targeting operations:
+    // - "name" → "nodeName" (LLMs confuse the updateName "name" field with node identification)
+    // - "id" → "nodeId" (natural alias)
+    if (NODE_TARGETING_OPERATIONS.has(op.type)) {
+      if (!op.nodeName && !op.nodeId && op.name) {
+        op.nodeName = op.name;
+        op.name = undefined;
+      }
+      if (!op.nodeId && op.id) {
+        op.nodeId = op.id;
+        op.id = undefined;
+      }
+    }
+    return op;
   })),
   validateOnly: z.boolean().optional(),
   continueOnError: z.boolean().optional(),
@@ -348,6 +372,26 @@ export async function handleUpdatePartialWorkflow(
         }
       }
 
+      // Handle project transfer if requested (before activation so workflow is in target project first)
+      let transferMessage = '';
+      if (diffResult.transferToProjectId) {
+        try {
+          await client.transferWorkflow(input.id, diffResult.transferToProjectId);
+          transferMessage = ` Workflow transferred to project ${diffResult.transferToProjectId}.`;
+        } catch (transferError) {
+          logger.error('Failed to transfer workflow to project', transferError);
+          return {
+            success: false,
+            saved: true,
+            error: 'Workflow updated successfully but project transfer failed',
+            details: {
+              workflowUpdated: true,
+              transferError: transferError instanceof Error ? transferError.message : 'Unknown error'
+            }
+          };
+        }
+      }
+
       // Handle activation/deactivation if requested
       let finalWorkflow = updatedWorkflow;
       let activationMessage = '';
@@ -432,7 +476,7 @@ export async function handleUpdatePartialWorkflow(
           nodeCount: finalWorkflow.nodes?.length || 0,
           operationsApplied: diffResult.operationsApplied
         },
-        message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
+        message: `Workflow "${finalWorkflow.name}" updated successfully. Applied ${diffResult.operationsApplied} operations.${transferMessage}${activationMessage} Use n8n_get_workflow with mode 'structure' to verify current state.`,
         details: {
           applied: diffResult.applied,
           failed: diffResult.failed,
@@ -537,6 +581,8 @@ function inferIntentFromOperations(operations: any[]): string {
         return 'Activate workflow';
       case 'deactivateWorkflow':
         return 'Deactivate workflow';
+      case 'transferWorkflow':
+        return `Transfer workflow to project ${op.destinationProjectId || ''}`.trim();
       default:
         return `Workflow ${op.type}`;
     }

src/mcp/server.ts

@@ -1029,6 +1029,11 @@ export class N8NDocumentationMCPServer {
           ? { valid: true, errors: [] }
           : { valid: false, errors: [{ field: 'action', message: 'action is required' }] };
         break;
+      case 'n8n_manage_datatable':
+        validationResult = args.action
+          ? { valid: true, errors: [] }
+          : { valid: false, errors: [{ field: 'action', message: 'action is required' }] };
+        break;
       case 'n8n_deploy_template':
         // Requires templateId parameter
         validationResult = args.templateId !== undefined
@@ -1496,6 +1501,26 @@ export class N8NDocumentationMCPServer {
         if (!this.repository) throw new Error('Repository not initialized');
         return n8nHandlers.handleDeployTemplate(args, this.templateService, this.repository, this.instanceContext);
 
+      case 'n8n_manage_datatable': {
+        this.validateToolParams(name, args, ['action']);
+        const dtAction = args.action;
+        // Each handler validates its own inputs via Zod schemas
+        switch (dtAction) {
+          case 'createTable':  return n8nHandlers.handleCreateTable(args, this.instanceContext);
+          case 'listTables':   return n8nHandlers.handleListTables(args, this.instanceContext);
+          case 'getTable':     return n8nHandlers.handleGetTable(args, this.instanceContext);
+          case 'updateTable':  return n8nHandlers.handleUpdateTable(args, this.instanceContext);
+          case 'deleteTable':  return n8nHandlers.handleDeleteTable(args, this.instanceContext);
+          case 'getRows':      return n8nHandlers.handleGetRows(args, this.instanceContext);
+          case 'insertRows':   return n8nHandlers.handleInsertRows(args, this.instanceContext);
+          case 'updateRows':   return n8nHandlers.handleUpdateRows(args, this.instanceContext);
+          case 'upsertRows':   return n8nHandlers.handleUpsertRows(args, this.instanceContext);
+          case 'deleteRows':   return n8nHandlers.handleDeleteRows(args, this.instanceContext);
+          default:
+            throw new Error(`Unknown action: ${dtAction}. Valid actions: createTable, listTables, getTable, updateTable, deleteTable, getRows, insertRows, updateRows, upsertRows, deleteRows`);
+        }
+      }
+
       default:
         throw new Error(`Unknown tool: ${name}`);
     }

src/mcp/tool-docs/index.ts

@@ -22,7 +22,8 @@ import {
   n8nTestWorkflowDoc,
   n8nExecutionsDoc,
   n8nWorkflowVersionsDoc,
-  n8nDeployTemplateDoc
+  n8nDeployTemplateDoc,
+  n8nManageDatatableDoc
 } from './workflow_management';
 
 // Combine all tool documentations into a single object
@@ -60,7 +61,8 @@ export const toolsDocumentation: Record<string, ToolDocumentation> = {
   n8n_test_workflow: n8nTestWorkflowDoc,
   n8n_executions: n8nExecutionsDoc,
   n8n_workflow_versions: n8nWorkflowVersionsDoc,
-  n8n_deploy_template: n8nDeployTemplateDoc
+  n8n_deploy_template: n8nDeployTemplateDoc,
+  n8n_manage_datatable: n8nManageDatatableDoc
 };
 
 // Re-export types

src/mcp/tool-docs/workflow_management/index.ts

@@ -10,3 +10,4 @@ export { n8nTestWorkflowDoc } from './n8n-test-workflow';
 export { n8nExecutionsDoc } from './n8n-executions';
 export { n8nWorkflowVersionsDoc } from './n8n-workflow-versions';
 export { n8nDeployTemplateDoc } from './n8n-deploy-template';
+export { n8nManageDatatableDoc } from './n8n-manage-datatable';

src/mcp/tool-docs/workflow_management/n8n-manage-datatable.ts

@@ -0,0 +1,109 @@
+import { ToolDocumentation } from '../types';
+
+export const n8nManageDatatableDoc: ToolDocumentation = {
+  name: 'n8n_manage_datatable',
+  category: 'workflow_management',
+  essentials: {
+    description: 'Manage n8n data tables and rows. Unified tool for table CRUD and row operations with filtering, pagination, and dry-run support.',
+    keyParameters: ['action', 'tableId', 'name', 'data', 'filter'],
+    example: 'n8n_manage_datatable({action: "createTable", name: "Contacts", columns: [{name: "email", type: "string"}]})',
+    performance: 'Fast (100-500ms)',
+    tips: [
+      'Table actions: createTable, listTables, getTable, updateTable, deleteTable',
+      'Row actions: getRows, insertRows, updateRows, upsertRows, deleteRows',
+      'Use dryRun: true to preview update/upsert/delete before applying',
+      'Filter supports: eq, neq, like, ilike, gt, gte, lt, lte conditions',
+      'Use returnData: true to get affected rows back from update/upsert/delete',
+      'Requires n8n enterprise or cloud with data tables feature'
+    ]
+  },
+  full: {
+    description: `**Table Actions:**
+- **createTable**: Create a new data table with optional typed columns
+- **listTables**: List all data tables (paginated)
+- **getTable**: Get table details and column definitions by ID
+- **updateTable**: Rename an existing table
+- **deleteTable**: Permanently delete a table and all its rows
+
+**Row Actions:**
+- **getRows**: List rows with filtering, sorting, search, and pagination
+- **insertRows**: Insert one or more rows (bulk)
+- **updateRows**: Update rows matching a filter condition
+- **upsertRows**: Update matching row or insert if none match
+- **deleteRows**: Delete rows matching a filter condition (filter required)
+
+**Filter System:** Used in getRows, updateRows, upsertRows, deleteRows
+- Combine conditions with "and" (default) or "or"
+- Conditions: eq, neq, like, ilike, gt, gte, lt, lte
+- Example: {type: "and", filters: [{columnName: "status", condition: "eq", value: "active"}]}
+
+**Dry Run:** updateRows, upsertRows, and deleteRows support dryRun: true to preview changes without applying them.`,
+    parameters: {
+      action: { type: 'string', required: true, description: 'Operation to perform' },
+      tableId: { type: 'string', required: false, description: 'Data table ID (required for all except createTable and listTables)' },
+      name: { type: 'string', required: false, description: 'For createTable/updateTable: table name' },
+      columns: { type: 'array', required: false, description: 'For createTable: column definitions [{name, type?}]. Types: string, number, boolean, date' },
+      data: { type: 'array|object', required: false, description: 'For insertRows: array of row objects. For updateRows/upsertRows: object with column values' },
+      filter: { type: 'object', required: false, description: 'Filter: {type?: "and"|"or", filters: [{columnName, condition, value}]}' },
+      limit: { type: 'number', required: false, description: 'For listTables/getRows: max results (1-100)' },
+      cursor: { type: 'string', required: false, description: 'For listTables/getRows: pagination cursor' },
+      sortBy: { type: 'string', required: false, description: 'For getRows: "columnName:asc" or "columnName:desc"' },
+      search: { type: 'string', required: false, description: 'For getRows: full-text search across string columns' },
+      returnType: { type: 'string', required: false, description: 'For insertRows: "count" (default), "id", or "all"' },
+      returnData: { type: 'boolean', required: false, description: 'For updateRows/upsertRows/deleteRows: return affected rows (default: false)' },
+      dryRun: { type: 'boolean', required: false, description: 'For updateRows/upsertRows/deleteRows: preview without applying (default: false)' },
+    },
+    returns: `Depends on action:
+- createTable: {id, name}
+- listTables: {tables, count, nextCursor?}
+- getTable: Full table object with columns
+- updateTable: Updated table object
+- deleteTable: Success message
+- getRows: {rows, count, nextCursor?}
+- insertRows: Depends on returnType (count/ids/rows)
+- updateRows: Update result with optional rows
+- upsertRows: Upsert result with action type
+- deleteRows: Delete result with optional rows`,
+    examples: [
+      '// Create a table\nn8n_manage_datatable({action: "createTable", name: "Contacts", columns: [{name: "email", type: "string"}, {name: "score", type: "number"}]})',
+      '// List all tables\nn8n_manage_datatable({action: "listTables"})',
+      '// Get table details\nn8n_manage_datatable({action: "getTable", tableId: "dt-123"})',
+      '// Rename a table\nn8n_manage_datatable({action: "updateTable", tableId: "dt-123", name: "New Name"})',
+      '// Delete a table\nn8n_manage_datatable({action: "deleteTable", tableId: "dt-123"})',
+      '// Get rows with filter\nn8n_manage_datatable({action: "getRows", tableId: "dt-123", filter: {filters: [{columnName: "status", condition: "eq", value: "active"}]}, limit: 50})',
+      '// Search rows\nn8n_manage_datatable({action: "getRows", tableId: "dt-123", search: "john", sortBy: "name:asc"})',
+      '// Insert rows\nn8n_manage_datatable({action: "insertRows", tableId: "dt-123", data: [{email: "a@b.com", score: 10}], returnType: "all"})',
+      '// Update rows (dry run)\nn8n_manage_datatable({action: "updateRows", tableId: "dt-123", filter: {filters: [{columnName: "score", condition: "lt", value: 5}]}, data: {status: "inactive"}, dryRun: true})',
+      '// Upsert a row\nn8n_manage_datatable({action: "upsertRows", tableId: "dt-123", filter: {filters: [{columnName: "email", condition: "eq", value: "a@b.com"}]}, data: {score: 15}, returnData: true})',
+      '// Delete rows\nn8n_manage_datatable({action: "deleteRows", tableId: "dt-123", filter: {filters: [{columnName: "status", condition: "eq", value: "deleted"}]}})',
+    ],
+    useCases: [
+      'Persist structured workflow data across executions',
+      'Store and query lookup tables for workflow logic',
+      'Bulk insert records from external data sources',
+      'Conditionally update records matching criteria',
+      'Upsert to maintain unique records by key column',
+      'Clean up old or invalid rows with filtered delete',
+      'Preview changes with dryRun before modifying data',
+    ],
+    performance: 'Table operations: 50-300ms. Row operations: 100-500ms depending on data size and filters.',
+    bestPractices: [
+      'Define column types upfront for schema consistency',
+      'Use dryRun: true before bulk updates/deletes to verify filter correctness',
+      'Use returnType: "count" (default) for insertRows to minimize response size',
+      'Use filter with specific conditions to avoid unintended bulk operations',
+      'Use cursor-based pagination for large result sets',
+      'Use sortBy for deterministic row ordering',
+    ],
+    pitfalls: [
+      'Requires N8N_API_URL and N8N_API_KEY configured',
+      'Feature only available on n8n enterprise or cloud plans',
+      'deleteTable permanently deletes all rows — cannot be undone',
+      'deleteRows requires a filter — cannot delete all rows without one',
+      'Column types cannot be changed after table creation via API',
+      'updateTable can only rename the table (no column modifications via public API)',
+      'projectId cannot be set via the public API — use the n8n UI',
+    ],
+    relatedTools: ['n8n_create_workflow', 'n8n_list_workflows', 'n8n_health_check'],
+  },
+};

src/mcp/tool-docs/workflow_management/n8n-update-partial-workflow.ts

@@ -4,7 +4,7 @@ export const n8nUpdatePartialWorkflowDoc: ToolDocumentation = {
   name: 'n8n_update_partial_workflow',
   category: 'workflow_management',
   essentials: {
-    description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
+    description: 'Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, rewireConnection, cleanStaleConnections, replaceConnections, updateSettings, updateName, add/removeTag, activateWorkflow, deactivateWorkflow, transferWorkflow. Supports smart parameters (branch, case) for multi-output nodes. Full support for AI connections (ai_languageModel, ai_tool, ai_memory, ai_embedding, ai_vectorStore, ai_document, ai_textSplitter, ai_outputParser).',
     keyParameters: ['id', 'operations', 'continueOnError'],
     example: 'n8n_update_partial_workflow({id: "wf_123", operations: [{type: "rewireConnection", source: "IF", from: "Old", to: "New", branch: "true"}]})',
     performance: 'Fast (50-200ms)',
@@ -22,7 +22,8 @@ export const n8nUpdatePartialWorkflowDoc: ToolDocumentation = {
       'Batch AI component connections for atomic updates',
       'Auto-sanitization: ALL nodes auto-fixed during updates (operator structures, missing metadata)',
       'Node renames automatically update all connection references - no manual connection operations needed',
-      'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)'
+      'Activate/deactivate workflows: Use activateWorkflow/deactivateWorkflow operations (requires activatable triggers like webhook/schedule)',
+      'Transfer workflows between projects: Use transferWorkflow with destinationProjectId (enterprise feature)'
     ]
   },
   full: {
@@ -55,6 +56,9 @@ export const n8nUpdatePartialWorkflowDoc: ToolDocumentation = {
 - **activateWorkflow**: Activate the workflow to enable automatic execution via triggers
 - **deactivateWorkflow**: Deactivate the workflow to prevent automatic execution
 
+### Project Management Operations (1 type):
+- **transferWorkflow**: Transfer the workflow to a different project. Requires \`destinationProjectId\`. Enterprise/cloud feature.
+
 ## Smart Parameters for Multi-Output Nodes
 
 For **IF nodes**, use semantic 'branch' parameter instead of technical sourceIndex:
@@ -194,12 +198,12 @@ Please choose a different name.
 - Can rename a node and add/remove connections using the new name in the same batch
 - Use \`validateOnly: true\` to preview effects before applying
 
-## Removing Properties with undefined
+## Removing Properties with null
 
-To remove a property from a node, set its value to \`undefined\` in the updates object. This is essential when migrating from deprecated properties or cleaning up optional configuration fields.
+To remove a property from a node, set its value to \`null\` in the updates object. This is essential when migrating from deprecated properties or cleaning up optional configuration fields.
 
-### Why Use undefined?
-- **Property removal vs. null**: Setting a property to \`undefined\` removes it completely from the node object, while \`null\` sets the property to a null value
+### Why Use null?
+- **Property removal**: Setting a property to \`null\` removes it completely from the node object
 - **Validation constraints**: Some properties are mutually exclusive (e.g., \`continueOnFail\` and \`onError\`). Simply setting one without removing the other will fail validation
 - **Deprecated property migration**: When n8n deprecates properties, you must remove the old property before the new one will work
 
@@ -211,7 +215,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeName: "HTTP Request",
-    updates: { onError: undefined }
+    updates: { onError: null }
   }]
 });
 
@@ -221,7 +225,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeId: "node_abc",
-    updates: { disabled: undefined }
+    updates: { disabled: null }
   }]
 });
 \`\`\`
@@ -235,7 +239,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeName: "API Request",
-    updates: { "parameters.authentication": undefined }
+    updates: { "parameters.authentication": null }
   }]
 });
 
@@ -245,7 +249,7 @@ n8n_update_partial_workflow({
   operations: [{
     type: "updateNode",
     nodeName: "HTTP Request",
-    updates: { "parameters.headers": undefined }
+    updates: { "parameters.headers": null }
   }]
 });
 \`\`\`
@@ -271,7 +275,7 @@ n8n_update_partial_workflow({
     type: "updateNode",
     nodeName: "HTTP Request",
     updates: {
-      continueOnFail: undefined,
+      continueOnFail: null,
       onError: "continueErrorOutput"
     }
   }]
@@ -287,15 +291,15 @@ n8n_update_partial_workflow({
     type: "updateNode",
     nodeName: "Data Processor",
     updates: {
-      continueOnFail: undefined,
-      alwaysOutputData: undefined,
-      "parameters.legacy_option": undefined
+      continueOnFail: null,
+      alwaysOutputData: null,
+      "parameters.legacy_option": null
     }
   }]
 });
 \`\`\`
 
-### When to Use undefined
+### When to Use null
 - Removing deprecated properties during migration
 - Cleaning up optional configuration flags
 - Resolving mutual exclusivity validation errors
@@ -341,11 +345,14 @@ n8n_update_partial_workflow({
       '// Rewire AI Agent to use different language model\nn8n_update_partial_workflow({id: "ai9", operations: [{type: "rewireConnection", source: "AI Agent", from: "OpenAI Chat Model", to: "Anthropic Chat Model", sourceOutput: "ai_languageModel"}]})',
       '// Replace all AI tools for an agent\nn8n_update_partial_workflow({id: "ai10", operations: [\n  {type: "removeConnection", source: "Old Tool 1", target: "AI Agent", sourceOutput: "ai_tool"},\n  {type: "removeConnection", source: "Old Tool 2", target: "AI Agent", sourceOutput: "ai_tool"},\n  {type: "addConnection", source: "New HTTP Tool", target: "AI Agent", sourceOutput: "ai_tool"},\n  {type: "addConnection", source: "New Code Tool", target: "AI Agent", sourceOutput: "ai_tool"}\n]})',
       '\n// ============ REMOVING PROPERTIES EXAMPLES ============',
-      '// Remove a simple property\nn8n_update_partial_workflow({id: "rm1", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {onError: undefined}}]})',
-      '// Migrate from deprecated continueOnFail to onError\nn8n_update_partial_workflow({id: "rm2", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {continueOnFail: undefined, onError: "continueErrorOutput"}}]})',
-      '// Remove nested property\nn8n_update_partial_workflow({id: "rm3", operations: [{type: "updateNode", nodeName: "API Request", updates: {"parameters.authentication": undefined}}]})',
-      '// Remove multiple properties\nn8n_update_partial_workflow({id: "rm4", operations: [{type: "updateNode", nodeName: "Data Processor", updates: {continueOnFail: undefined, alwaysOutputData: undefined, "parameters.legacy_option": undefined}}]})',
-      '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": undefined}}]})'
+      '// Remove a simple property\nn8n_update_partial_workflow({id: "rm1", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {onError: null}}]})',
+      '// Migrate from deprecated continueOnFail to onError\nn8n_update_partial_workflow({id: "rm2", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {continueOnFail: null, onError: "continueErrorOutput"}}]})',
+      '// Remove nested property\nn8n_update_partial_workflow({id: "rm3", operations: [{type: "updateNode", nodeName: "API Request", updates: {"parameters.authentication": null}}]})',
+      '// Remove multiple properties\nn8n_update_partial_workflow({id: "rm4", operations: [{type: "updateNode", nodeName: "Data Processor", updates: {continueOnFail: null, alwaysOutputData: null, "parameters.legacy_option": null}}]})',
+      '// Remove entire array property\nn8n_update_partial_workflow({id: "rm5", operations: [{type: "updateNode", nodeName: "HTTP Request", updates: {"parameters.headers": null}}]})',
+      '\n// ============ PROJECT TRANSFER EXAMPLES ============',
+      '// Transfer workflow to a different project\nn8n_update_partial_workflow({id: "tf1", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}]})',
+      '// Transfer and activate in one call\nn8n_update_partial_workflow({id: "tf2", operations: [{type: "transferWorkflow", destinationProjectId: "project-abc-123"}, {type: "activateWorkflow"}]})'
     ],
     useCases: [
       'Rewire connections when replacing nodes',
@@ -363,7 +370,8 @@ n8n_update_partial_workflow({
       'Add fallback language models to AI Agents',
       'Configure Vector Store retrieval systems',
       'Swap language models in existing AI workflows',
-      'Batch-update AI tool connections'
+      'Batch-update AI tool connections',
+      'Transfer workflows between team projects (enterprise)'
     ],
     performance: 'Very fast - typically 50-200ms. Much faster than full updates as only changes are processed.',
     bestPractices: [
@@ -383,9 +391,9 @@ n8n_update_partial_workflow({
       'Use targetIndex for fallback models (primary=0, fallback=1)',
       'Batch AI component connections in a single operation for atomicity',
       'Validate AI workflows after connection changes to catch configuration errors',
-      'To remove properties, set them to undefined (not null) in the updates object',
+      'To remove properties, set them to null in the updates object',
       'When migrating from deprecated properties, remove the old property and add the new one in the same operation',
-      'Use undefined to resolve mutual exclusivity validation errors between properties',
+      'Use null to resolve mutual exclusivity validation errors between properties',
       'Batch multiple property removals in a single updateNode operation for efficiency'
     ],
     pitfalls: [
@@ -407,8 +415,8 @@ n8n_update_partial_workflow({
       '**Auto-sanitization runs on ALL nodes**: When ANY update is made, ALL nodes in the workflow are sanitized (not just modified ones)',
       '**Auto-sanitization cannot fix everything**: It fixes operator structures and missing metadata, but cannot fix broken connections or branch mismatches',
       '**Corrupted workflows beyond repair**: Workflows in paradoxical states (API returns corrupt, API rejects updates) cannot be fixed via API - must be recreated',
-      'Setting a property to null does NOT remove it - use undefined instead',
-      'When properties are mutually exclusive (e.g., continueOnFail and onError), setting only the new property will fail - you must remove the old one with undefined',
+      'To remove a property, set it to null in the updates object',
+      'When properties are mutually exclusive (e.g., continueOnFail and onError), setting only the new property will fail - you must remove the old one with null',
       'Removing a required property may cause validation errors - check node documentation first',
       'Nested property removal with dot notation only removes the specific nested field, not the entire parent object',
       'Array index notation (e.g., "parameters.headers[0]") is not supported - remove the entire array property instead'

src/mcp/tools-n8n-manager.ts

@@ -63,6 +63,10 @@ export const n8nManagementTools: ToolDefinition[] = [
             executionTimeout: { type: 'number' },
             errorWorkflow: { type: 'string' }
           }
+        },
+        projectId: {
+          type: 'string',
+          description: 'Optional project ID to create the workflow in (enterprise feature)'
         }
       },
       required: ['name', 'nodes', 'connections']
@@ -143,7 +147,7 @@ export const n8nManagementTools: ToolDefinition[] = [
   },
   {
     name: 'n8n_update_partial_workflow',
-    description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
+    description: `Update workflow incrementally with diff operations. Types: addNode, removeNode, updateNode, moveNode, enable/disableNode, addConnection, removeConnection, updateSettings, updateName, add/removeTag, activate/deactivateWorkflow, transferWorkflow. See tools_documentation("n8n_update_partial_workflow", "full") for details.`,
     inputSchema: {
       type: 'object',
       additionalProperties: true,  // Allow any extra properties Claude Desktop might add
@@ -602,5 +606,52 @@ export const n8nManagementTools: ToolDefinition[] = [
       destructiveHint: false,
       openWorldHint: true,
     },
-  }
+  },
+  {
+    name: 'n8n_manage_datatable',
+    description: `Manage n8n data tables and rows. Actions: createTable, listTables, getTable, updateTable, deleteTable, getRows, insertRows, updateRows, upsertRows, deleteRows. Requires n8n enterprise/cloud with data tables feature.`,
+    inputSchema: {
+      type: 'object',
+      properties: {
+        action: {
+          type: 'string',
+          enum: ['createTable', 'listTables', 'getTable', 'updateTable', 'deleteTable', 'getRows', 'insertRows', 'updateRows', 'upsertRows', 'deleteRows'],
+          description: 'Operation to perform',
+        },
+        tableId: { type: 'string', description: 'Data table ID (required for all actions except createTable and listTables)' },
+        name: { type: 'string', description: 'For createTable/updateTable: table name' },
+        columns: {
+          type: 'array',
+          description: 'For createTable: column definitions',
+          items: {
+            type: 'object',
+            properties: {
+              name: { type: 'string' },
+              type: { type: 'string', enum: ['string', 'number', 'boolean', 'date'] },
+            },
+            required: ['name'],
+          },
+        },
+        data: { description: 'For insertRows: array of row objects. For updateRows/upsertRows: object with column values.' },
+        filter: {
+          type: 'object',
+          description: 'For getRows/updateRows/upsertRows/deleteRows: {type?: "and"|"or", filters: [{columnName, condition, value}]}',
+        },
+        limit: { type: 'number', description: 'For listTables/getRows: max results (1-100)' },
+        cursor: { type: 'string', description: 'For listTables/getRows: pagination cursor' },
+        sortBy: { type: 'string', description: 'For getRows: "columnName:asc" or "columnName:desc"' },
+        search: { type: 'string', description: 'For getRows: text search across string columns' },
+        returnType: { type: 'string', enum: ['count', 'id', 'all'], description: 'For insertRows: what to return (default: count)' },
+        returnData: { type: 'boolean', description: 'For updateRows/upsertRows/deleteRows: return affected rows (default: false)' },
+        dryRun: { type: 'boolean', description: 'For updateRows/upsertRows/deleteRows: preview without applying (default: false)' },
+      },
+      required: ['action'],
+    },
+    annotations: {
+      title: 'Manage Data Tables',
+      readOnlyHint: false,
+      destructiveHint: true,
+      openWorldHint: true,
+    },
+  },
 ];

src/services/n8n-api-client.ts

@@ -22,6 +22,15 @@ import {
   SourceControlStatus,
   SourceControlPullResult,
   SourceControlPushResult,
+  DataTable,
+  DataTableColumn,
+  DataTableListParams,
+  DataTableRow,
+  DataTableRowListParams,
+  DataTableInsertRowsParams,
+  DataTableUpdateRowsParams,
+  DataTableUpsertRowParams,
+  DataTableDeleteRowsParams,
 } from '../types/n8n-api';
 import { handleN8nApiError, logN8nError } from '../utils/n8n-errors';
 import { cleanWorkflowForCreate, cleanWorkflowForUpdate } from './n8n-validation';
@@ -252,6 +261,14 @@ export class N8nApiClient {
     }
   }
 
+  async transferWorkflow(id: string, destinationProjectId: string): Promise<void> {
+    try {
+      await this.client.put(`/workflows/${id}/transfer`, { destinationProjectId });
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
   async activateWorkflow(id: string): Promise<Workflow> {
     try {
       const response = await this.client.post(`/workflows/${id}/activate`, {});
@@ -574,6 +591,95 @@ export class N8nApiClient {
     }
   }
 
+  async createDataTable(params: { name: string; columns?: DataTableColumn[] }): Promise<DataTable> {
+    try {
+      const response = await this.client.post('/data-tables', params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async listDataTables(params: DataTableListParams = {}): Promise<{ data: DataTable[]; nextCursor?: string | null }> {
+    try {
+      const response = await this.client.get('/data-tables', { params });
+      return this.validateListResponse<DataTable>(response.data, 'data-tables');
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async getDataTable(id: string): Promise<DataTable> {
+    try {
+      const response = await this.client.get(`/data-tables/${id}`);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async updateDataTable(id: string, params: { name: string }): Promise<DataTable> {
+    try {
+      const response = await this.client.patch(`/data-tables/${id}`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async deleteDataTable(id: string): Promise<void> {
+    try {
+      await this.client.delete(`/data-tables/${id}`);
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async getDataTableRows(id: string, params: DataTableRowListParams = {}): Promise<{ data: DataTableRow[]; nextCursor?: string | null }> {
+    try {
+      const response = await this.client.get(`/data-tables/${id}/rows`, { params });
+      return this.validateListResponse<DataTableRow>(response.data, 'data-table-rows');
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async insertDataTableRows(id: string, params: DataTableInsertRowsParams): Promise<any> {
+    try {
+      const response = await this.client.post(`/data-tables/${id}/rows`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async updateDataTableRows(id: string, params: DataTableUpdateRowsParams): Promise<any> {
+    try {
+      const response = await this.client.patch(`/data-tables/${id}/rows/update`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async upsertDataTableRow(id: string, params: DataTableUpsertRowParams): Promise<any> {
+    try {
+      const response = await this.client.post(`/data-tables/${id}/rows/upsert`, params);
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
+  async deleteDataTableRows(id: string, params: DataTableDeleteRowsParams): Promise<any> {
+    try {
+      const response = await this.client.delete(`/data-tables/${id}/rows/delete`, { params });
+      return response.data;
+    } catch (error) {
+      throw handleN8nApiError(error);
+    }
+  }
+
   /**
    * Validates and normalizes n8n API list responses.
    * Handles both modern format {data: [], nextCursor?: string} and legacy array format.

src/services/n8n-validation.ts

@@ -49,7 +49,7 @@ export const workflowConnectionSchema = z.record(
     ai_memory: connectionArraySchema.optional(),
     ai_embedding: connectionArraySchema.optional(),
     ai_vectorStore: connectionArraySchema.optional(),
-  })
+  }).catchall(connectionArraySchema) // Allow additional AI connection types (ai_outputParser, ai_document, ai_textSplitter, etc.)
 );
 
 export const workflowSettingsSchema = z.object({
@@ -248,15 +248,15 @@ export function validateWorkflowStructure(workflow: Partial<Workflow>): string[]
       const connectedNodes = new Set<string>();
 
       // Collect all nodes that appear in connections (as source or target)
-      // Check ALL connection types, not just 'main' - AI workflows use ai_tool, ai_languageModel, etc.
-      const ALL_CONNECTION_TYPES = ['main', 'error', 'ai_tool', 'ai_languageModel', 'ai_memory', 'ai_embedding', 'ai_vectorStore'] as const;
-
+      // Iterate over ALL connection types present in the data — not a hardcoded list —
+      // so that every AI connection type (ai_outputParser, ai_document, ai_textSplitter,
+      // ai_agent, ai_chain, ai_retriever, etc.) is covered automatically.
       Object.entries(workflow.connections).forEach(([sourceName, connection]) => {
         connectedNodes.add(sourceName); // Node has outgoing connection
 
-        // Check all connection types for target nodes
-        ALL_CONNECTION_TYPES.forEach(connType => {
-          const connData = (connection as Record<string, unknown>)[connType];
+        // Check every connection type key present on this source node
+        const connectionRecord = connection as Record<string, unknown>;
+        Object.values(connectionRecord).forEach((connData) => {
           if (connData && Array.isArray(connData)) {
             connData.forEach((outputs) => {
               if (Array.isArray(outputs)) {
@@ -429,24 +429,29 @@ export function validateWorkflowStructure(workflow: Partial<Workflow>): string[]
         }
       }
       
-      if (connection.main && Array.isArray(connection.main)) {
-        connection.main.forEach((outputs, outputIndex) => {
-          if (Array.isArray(outputs)) {
-            outputs.forEach((target, targetIndex) => {
-              // Check if target exists by name (correct)
-              if (!nodeNames.has(target.node)) {
-                // Check if they're using an ID instead of name
-                if (nodeIds.has(target.node)) {
-                  const correctName = nodeIdToName.get(target.node);
-                  errors.push(`Connection target uses node ID '${target.node}' but must use node name '${correctName}' (from ${sourceName}[${outputIndex}][${targetIndex}])`);
-                } else {
-                  errors.push(`Connection references non-existent target node: ${target.node} (from ${sourceName}[${outputIndex}][${targetIndex}])`);
+      // Check all connection types (main, error, ai_tool, ai_languageModel, etc.)
+      const connectionRecord = connection as Record<string, unknown>;
+      Object.values(connectionRecord).forEach((connData) => {
+        if (connData && Array.isArray(connData)) {
+          connData.forEach((outputs: any, outputIndex: number) => {
+            if (Array.isArray(outputs)) {
+              outputs.forEach((target: any, targetIndex: number) => {
+                if (!target?.node) return;
+                // Check if target exists by name (correct)
+                if (!nodeNames.has(target.node)) {
+                  // Check if they're using an ID instead of name
+                  if (nodeIds.has(target.node)) {
+                    const correctName = nodeIdToName.get(target.node);
+                    errors.push(`Connection target uses node ID '${target.node}' but must use node name '${correctName}' (from ${sourceName}[${outputIndex}][${targetIndex}])`);
+                  } else {
+                    errors.push(`Connection references non-existent target node: ${target.node} (from ${sourceName}[${outputIndex}][${targetIndex}])`);
+                  }
                 }
-              }
-            });
-          }
-        });
-      }
+              });
+            }
+          });
+        }
+      });
     });
   }
 

src/services/node-specific-validators.ts

@@ -1374,8 +1374,11 @@ export class NodeSpecificValidators {
         });
       }
       
-      // Check for primitive return
-      if (/return\s+(true|false|null|undefined|\d+|['"`])/m.test(code)) {
+      // Skip primitive return check when helper functions are present,
+      // since we can't distinguish top-level vs nested returns without AST.
+      // Matches: function name(), const/let/var name = [async] function/arrow
+      const hasHelperFunctions = /(?:function\s+\w+\s*\(|(?:const|let|var)\s+\w+\s*=\s*(?:async\s+)?(?:function|\([^)]*\)\s*=>|\w+\s*=>))/.test(code);
+      if (!hasHelperFunctions && /return\s+(true|false|null|undefined|\d+|['"`])/m.test(code)) {
         errors.push({
           type: 'invalid_value',
           property: 'jsCode',
@@ -1487,7 +1490,7 @@ export class NodeSpecificValidators {
     // Check for common variable mistakes
     if (language === 'javaScript') {
       // Using $ without proper variable
-      if (/\$(?![a-zA-Z])/.test(code) && !code.includes('${')) {
+      if (/\$(?![a-zA-Z_(])/.test(code) && !code.includes('${')) {
         warnings.push({
           type: 'best_practice',
           message: 'Invalid $ usage detected',

src/services/workflow-auto-fixer.ts

@@ -671,11 +671,13 @@ export class WorkflowAutoFixer {
     filteredFixes: FixOperation[],
     allFixes: FixOperation[]
   ): WorkflowDiffOperation[] {
+    // fixedNodes contains node names (FixOperation.node = node.name)
     const fixedNodes = new Set(filteredFixes.map(f => f.node));
     const hasConnectionFixes = filteredFixes.some(f => CONNECTION_FIX_TYPES.includes(f.type));
     return operations.filter(op => {
       if (op.type === 'updateNode') {
-        return fixedNodes.has(op.nodeId || '');
+        // Check both nodeName and nodeId — operations may use either
+        return fixedNodes.has(op.nodeName || '') || fixedNodes.has(op.nodeId || '');
       }
       if (op.type === 'replaceConnections') {
         return hasConnectionFixes;
@@ -1186,10 +1188,11 @@ export class WorkflowAutoFixer {
           description: `Upgrade ${node.name} from v${currentVersion} to v${latestVersion}. ${analysis.reason}`
         });
 
-        // Create update operation
+        // Create update operation — both nodeId and nodeName needed for fix filtering
         const operation: UpdateNodeOperation = {
           type: 'updateNode',
           nodeId: node.id,
+          nodeName: node.name,
           updates: {
             typeVersion: parseFloat(latestVersion),
             parameters: migrationResult.updatedNode.parameters,

src/services/workflow-diff-engine.ts

@@ -28,7 +28,8 @@ import {
   ActivateWorkflowOperation,
   DeactivateWorkflowOperation,
   CleanStaleConnectionsOperation,
-  ReplaceConnectionsOperation
+  ReplaceConnectionsOperation,
+  TransferWorkflowOperation
 } from '../types/workflow-diff';
 import { Workflow, WorkflowNode, WorkflowConnection } from '../types/n8n-api';
 import { Logger } from '../utils/logger';
@@ -54,6 +55,8 @@ export class WorkflowDiffEngine {
   // Track tag operations for dedicated API calls
   private tagsToAdd: string[] = [];
   private tagsToRemove: string[] = [];
+  // Track transfer operation for dedicated API call
+  private transferToProjectId: string | undefined;
 
   /**
    * Apply diff operations to a workflow
@@ -70,6 +73,7 @@ export class WorkflowDiffEngine {
       this.removedNodeNames.clear();
       this.tagsToAdd = [];
       this.tagsToRemove = [];
+      this.transferToProjectId = undefined;
 
       // Clone workflow to avoid modifying original
       const workflowCopy = JSON.parse(JSON.stringify(workflow));
@@ -141,6 +145,12 @@ export class WorkflowDiffEngine {
           };
         }
 
+        // Extract and clean up activation flags (same as atomic mode)
+        const shouldActivate = (workflowCopy as any)._shouldActivate === true;
+        const shouldDeactivate = (workflowCopy as any)._shouldDeactivate === true;
+        delete (workflowCopy as any)._shouldActivate;
+        delete (workflowCopy as any)._shouldDeactivate;
+
         const success = appliedIndices.length > 0;
         return {
           success,
@@ -151,8 +161,11 @@ export class WorkflowDiffEngine {
           warnings: this.warnings.length > 0 ? this.warnings : undefined,
           applied: appliedIndices,
           failed: failedIndices,
+          shouldActivate: shouldActivate || undefined,
+          shouldDeactivate: shouldDeactivate || undefined,
           tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
-          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined
+          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+          transferToProjectId: this.transferToProjectId || undefined
         };
       } else {
         // Atomic mode: all operations must succeed
@@ -256,7 +269,8 @@ export class WorkflowDiffEngine {
           shouldActivate: shouldActivate || undefined,
           shouldDeactivate: shouldDeactivate || undefined,
           tagsToAdd: this.tagsToAdd.length > 0 ? this.tagsToAdd : undefined,
-          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined
+          tagsToRemove: this.tagsToRemove.length > 0 ? this.tagsToRemove : undefined,
+          transferToProjectId: this.transferToProjectId || undefined
         };
       }
     } catch (error) {
@@ -298,6 +312,8 @@ export class WorkflowDiffEngine {
       case 'addTag':
       case 'removeTag':
         return null; // These are always valid
+      case 'transferWorkflow':
+        return this.validateTransferWorkflow(workflow, operation as TransferWorkflowOperation);
       case 'activateWorkflow':
         return this.validateActivateWorkflow(workflow, operation);
       case 'deactivateWorkflow':
@@ -367,6 +383,9 @@ export class WorkflowDiffEngine {
       case 'replaceConnections':
         this.applyReplaceConnections(workflow, operation);
         break;
+      case 'transferWorkflow':
+        this.applyTransferWorkflow(workflow, operation as TransferWorkflowOperation);
+        break;
     }
   }
 
@@ -975,6 +994,18 @@ export class WorkflowDiffEngine {
     (workflow as any)._shouldDeactivate = true;
   }
 
+  // Transfer operation — uses dedicated API call (PUT /workflows/{id}/transfer)
+  private validateTransferWorkflow(_workflow: Workflow, operation: TransferWorkflowOperation): string | null {
+    if (!operation.destinationProjectId) {
+      return 'transferWorkflow requires a non-empty destinationProjectId string';
+    }
+    return null;
+  }
+
+  private applyTransferWorkflow(_workflow: Workflow, operation: TransferWorkflowOperation): void {
+    this.transferToProjectId = operation.destinationProjectId;
+  }
+
   // Connection cleanup operation validators
   private validateCleanStaleConnections(workflow: Workflow, operation: CleanStaleConnectionsOperation): string | null {
     // This operation is always valid - it just cleans up what it finds
@@ -1128,9 +1159,10 @@ export class WorkflowDiffEngine {
             const connection = connectionsAtIndex[connIndex];
             // Check if target node was renamed
             if (renames.has(connection.node)) {
+              const oldTargetName = connection.node;
               const newTargetName = renames.get(connection.node)!;
               connection.node = newTargetName;
-              logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${connection.node}" → "${newTargetName}"`);
+              logger.debug(`Updated connection: ${sourceName}[${outputType}][${outputIndex}][${connIndex}].node: "${oldTargetName}" → "${newTargetName}"`);
             }
           }
         }
@@ -1237,15 +1269,21 @@ export class WorkflowDiffEngine {
   private setNestedProperty(obj: any, path: string, value: any): void {
     const keys = path.split('.');
     let current = obj;
-    
+
     for (let i = 0; i < keys.length - 1; i++) {
       const key = keys[i];
-      if (!(key in current) || typeof current[key] !== 'object') {
+      if (!(key in current) || typeof current[key] !== 'object' || current[key] === null) {
+        if (value === null) return; // parent path doesn't exist, nothing to delete
         current[key] = {};
       }
       current = current[key];
     }
-    
-    current[keys[keys.length - 1]] = value;
+
+    const finalKey = keys[keys.length - 1];
+    if (value === null) {
+      delete current[finalKey];
+    } else {
+      current[finalKey] = value;
+    }
   }
 }

src/types/n8n-api.ts

@@ -454,4 +454,82 @@ export interface ErrorSuggestion {
   title: string;
   description: string;
   confidence: 'high' | 'medium' | 'low';
+}
+
+// Data Table types
+export interface DataTableColumn {
+  name: string;
+  type?: 'string' | 'number' | 'boolean' | 'date';
+}
+
+export interface DataTableColumnResponse {
+  id: string;
+  name: string;
+  type: 'string' | 'number' | 'boolean' | 'date';
+  index: number;
+}
+
+export interface DataTable {
+  id: string;
+  name: string;
+  columns?: DataTableColumnResponse[];
+  projectId?: string;
+  createdAt?: string;
+  updatedAt?: string;
+}
+
+export interface DataTableRow {
+  id?: number;
+  createdAt?: string;
+  updatedAt?: string;
+  [columnName: string]: unknown;
+}
+
+export interface DataTableFilterCondition {
+  columnName: string;
+  condition: 'eq' | 'neq' | 'like' | 'ilike' | 'gt' | 'gte' | 'lt' | 'lte';
+  value?: any;
+}
+
+export interface DataTableFilter {
+  type?: 'and' | 'or';
+  filters: DataTableFilterCondition[];
+}
+
+export interface DataTableListParams {
+  limit?: number;
+  cursor?: string;
+}
+
+export interface DataTableRowListParams {
+  limit?: number;
+  cursor?: string;
+  filter?: string;
+  sortBy?: string;
+  search?: string;
+}
+
+export interface DataTableInsertRowsParams {
+  data: Record<string, unknown>[];
+  returnType?: 'count' | 'id' | 'all';
+}
+
+export interface DataTableUpdateRowsParams {
+  filter: DataTableFilter;
+  data: Record<string, unknown>;
+  returnData?: boolean;
+  dryRun?: boolean;
+}
+
+export interface DataTableUpsertRowParams {
+  filter: DataTableFilter;
+  data: Record<string, unknown>;
+  returnData?: boolean;
+  dryRun?: boolean;
+}
+
+export interface DataTableDeleteRowsParams {
+  filter: string;
+  returnData?: boolean;
+  dryRun?: boolean;
 }

src/types/workflow-diff.ts

@@ -124,6 +124,11 @@ export interface DeactivateWorkflowOperation extends DiffOperation {
   // No additional properties needed - just deactivates the workflow
 }
 
+export interface TransferWorkflowOperation extends DiffOperation {
+  type: 'transferWorkflow';
+  destinationProjectId: string;
+}
+
 // Connection Cleanup Operations
 export interface CleanStaleConnectionsOperation extends DiffOperation {
   type: 'cleanStaleConnections';
@@ -161,7 +166,8 @@ export type WorkflowDiffOperation =
   | ActivateWorkflowOperation
   | DeactivateWorkflowOperation
   | CleanStaleConnectionsOperation
-  | ReplaceConnectionsOperation;
+  | ReplaceConnectionsOperation
+  | TransferWorkflowOperation;
 
 // Main diff request structure
 export interface WorkflowDiffRequest {
@@ -192,6 +198,7 @@ export interface WorkflowDiffResult {
   shouldDeactivate?: boolean; // Flag to deactivate workflow after update (for deactivateWorkflow operation)
   tagsToAdd?: string[];
   tagsToRemove?: string[];
+  transferToProjectId?: string; // For transferWorkflow operation - uses dedicated API call
 }
 
 // Helper type for node reference (supports both ID and name)

src/utils/n8n-errors.ts

@@ -22,8 +22,10 @@ export class N8nAuthenticationError extends N8nApiError {
 }
 
 export class N8nNotFoundError extends N8nApiError {
-  constructor(resource: string, id?: string) {
-    const message = id ? `${resource} with ID ${id} not found` : `${resource} not found`;
+  constructor(messageOrResource: string, id?: string) {
+    // If id is provided, format as "resource with ID id not found"
+    // Otherwise, use messageOrResource as-is (it's already a complete message from the API)
+    const message = id ? `${messageOrResource} with ID ${id} not found` : messageOrResource;
     super(message, 404, 'NOT_FOUND');
     this.name = 'N8nNotFoundError';
   }
@@ -70,7 +72,7 @@ export function handleN8nApiError(error: unknown): N8nApiError {
         case 401:
           return new N8nAuthenticationError(message);
         case 404:
-          return new N8nNotFoundError('Resource', message);
+          return new N8nNotFoundError(message || 'Resource');
         case 400:
           return new N8nValidationError(message, data);
         case 429:

tests/unit/mcp/handlers-manage-datatable.test.ts

@@ -0,0 +1,728 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { N8nApiClient } from '@/services/n8n-api-client';
+import { N8nApiError } from '@/utils/n8n-errors';
+
+// Mock dependencies
+vi.mock('@/services/n8n-api-client');
+vi.mock('@/config/n8n-api', () => ({
+  getN8nApiConfig: vi.fn(),
+}));
+vi.mock('@/services/n8n-validation', () => ({
+  validateWorkflowStructure: vi.fn(),
+  hasWebhookTrigger: vi.fn(),
+  getWebhookUrl: vi.fn(),
+}));
+vi.mock('@/utils/logger', () => ({
+  logger: {
+    info: vi.fn(),
+    error: vi.fn(),
+    debug: vi.fn(),
+    warn: vi.fn(),
+  },
+  Logger: vi.fn().mockImplementation(() => ({
+    info: vi.fn(),
+    error: vi.fn(),
+    debug: vi.fn(),
+    warn: vi.fn(),
+  })),
+  LogLevel: {
+    ERROR: 0,
+    WARN: 1,
+    INFO: 2,
+    DEBUG: 3,
+  },
+}));
+
+describe('Data Table Handlers (n8n_manage_datatable)', () => {
+  let mockApiClient: any;
+  let handlers: any;
+  let getN8nApiConfig: any;
+
+  beforeEach(async () => {
+    vi.clearAllMocks();
+
+    // Setup mock API client with all data table methods
+    mockApiClient = {
+      createWorkflow: vi.fn(),
+      getWorkflow: vi.fn(),
+      updateWorkflow: vi.fn(),
+      deleteWorkflow: vi.fn(),
+      listWorkflows: vi.fn(),
+      triggerWebhook: vi.fn(),
+      getExecution: vi.fn(),
+      listExecutions: vi.fn(),
+      deleteExecution: vi.fn(),
+      healthCheck: vi.fn(),
+      createDataTable: vi.fn(),
+      listDataTables: vi.fn(),
+      getDataTable: vi.fn(),
+      updateDataTable: vi.fn(),
+      deleteDataTable: vi.fn(),
+      getDataTableRows: vi.fn(),
+      insertDataTableRows: vi.fn(),
+      updateDataTableRows: vi.fn(),
+      upsertDataTableRow: vi.fn(),
+      deleteDataTableRows: vi.fn(),
+    };
+
+    // Import mocked modules
+    getN8nApiConfig = (await import('@/config/n8n-api')).getN8nApiConfig;
+
+    // Mock the API config
+    vi.mocked(getN8nApiConfig).mockReturnValue({
+      baseUrl: 'https://n8n.test.com',
+      apiKey: 'test-key',
+      timeout: 30000,
+      maxRetries: 3,
+    });
+
+    // Mock the N8nApiClient constructor
+    vi.mocked(N8nApiClient).mockImplementation(() => mockApiClient);
+
+    // Import handlers module after setting up mocks
+    handlers = await import('@/mcp/handlers-n8n-manager');
+  });
+
+  afterEach(() => {
+    if (handlers) {
+      const clientGetter = handlers.getN8nApiClient;
+      if (clientGetter) {
+        vi.mocked(getN8nApiConfig).mockReturnValue(null);
+        clientGetter();
+      }
+    }
+  });
+
+  // ========================================================================
+  // handleCreateTable
+  // ========================================================================
+  describe('handleCreateTable', () => {
+    it('should create data table with name and columns successfully', async () => {
+      const createdTable = {
+        id: 'dt-123',
+        name: 'My Data Table',
+        columns: [
+          { id: 'col-1', name: 'email', type: 'string', index: 0 },
+          { id: 'col-2', name: 'age', type: 'number', index: 1 },
+        ],
+      };
+
+      mockApiClient.createDataTable.mockResolvedValue(createdTable);
+
+      const result = await handlers.handleCreateTable({
+        name: 'My Data Table',
+        columns: [
+          { name: 'email', type: 'string' },
+          { name: 'age', type: 'number' },
+        ],
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: { id: 'dt-123', name: 'My Data Table' },
+        message: 'Data table "My Data Table" created with ID: dt-123',
+      });
+
+      expect(mockApiClient.createDataTable).toHaveBeenCalledWith({
+        name: 'My Data Table',
+        columns: [
+          { name: 'email', type: 'string' },
+          { name: 'age', type: 'number' },
+        ],
+      });
+    });
+
+    it('should create data table with name only (no columns)', async () => {
+      const createdTable = {
+        id: 'dt-456',
+        name: 'Empty Table',
+      };
+
+      mockApiClient.createDataTable.mockResolvedValue(createdTable);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Empty Table',
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: { id: 'dt-456', name: 'Empty Table' },
+        message: 'Data table "Empty Table" created with ID: dt-456',
+      });
+
+      expect(mockApiClient.createDataTable).toHaveBeenCalledWith({
+        name: 'Empty Table',
+      });
+    });
+
+    it('should return error when API returns empty response (null)', async () => {
+      mockApiClient.createDataTable.mockResolvedValue(null);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Ghost Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'Data table creation failed: n8n API returned an empty or invalid response',
+      });
+    });
+
+    it('should return error when API call fails', async () => {
+      const apiError = new Error('Data table creation failed on the server');
+      mockApiClient.createDataTable.mockRejectedValue(apiError);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Broken Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'Data table creation failed on the server',
+      });
+    });
+
+    it('should return Zod validation error when name is missing', async () => {
+      const result = await handlers.handleCreateTable({});
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+
+    it('should return error when n8n API is not configured', async () => {
+      vi.mocked(getN8nApiConfig).mockReturnValue(null);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Test Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'n8n API not configured. Please set N8N_API_URL and N8N_API_KEY environment variables.',
+      });
+    });
+
+    it('should return structured error for N8nApiError', async () => {
+      const apiError = new N8nApiError('Feature not available', 402, 'PAYMENT_REQUIRED', { plan: 'enterprise' });
+      mockApiClient.createDataTable.mockRejectedValue(apiError);
+
+      const result = await handlers.handleCreateTable({
+        name: 'Enterprise Table',
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('PAYMENT_REQUIRED');
+      expect(result.details).toEqual({ plan: 'enterprise' });
+    });
+
+    it('should return Unknown error when a non-Error value is thrown', async () => {
+      mockApiClient.createDataTable.mockRejectedValue('string-error');
+
+      const result = await handlers.handleCreateTable({
+        name: 'Error Table',
+      });
+
+      expect(result).toEqual({
+        success: false,
+        error: 'Unknown error occurred',
+      });
+    });
+  });
+
+  // ========================================================================
+  // handleListTables
+  // ========================================================================
+  describe('handleListTables', () => {
+    it('should list tables successfully', async () => {
+      const tables = [
+        { id: 'dt-1', name: 'Table One' },
+        { id: 'dt-2', name: 'Table Two' },
+      ];
+      mockApiClient.listDataTables.mockResolvedValue({ data: tables, nextCursor: null });
+
+      const result = await handlers.handleListTables({});
+
+      expect(result).toEqual({
+        success: true,
+        data: {
+          tables,
+          count: 2,
+          nextCursor: undefined,
+        },
+      });
+    });
+
+    it('should return empty list when no tables exist', async () => {
+      mockApiClient.listDataTables.mockResolvedValue({ data: [], nextCursor: null });
+
+      const result = await handlers.handleListTables({});
+
+      expect(result).toEqual({
+        success: true,
+        data: {
+          tables: [],
+          count: 0,
+          nextCursor: undefined,
+        },
+      });
+    });
+
+    it('should pass pagination params (limit, cursor)', async () => {
+      mockApiClient.listDataTables.mockResolvedValue({
+        data: [{ id: 'dt-3', name: 'Page Two' }],
+        nextCursor: 'cursor-next',
+      });
+
+      const result = await handlers.handleListTables({ limit: 10, cursor: 'cursor-abc' });
+
+      expect(mockApiClient.listDataTables).toHaveBeenCalledWith({ limit: 10, cursor: 'cursor-abc' });
+      expect(result.success).toBe(true);
+      expect(result.data.nextCursor).toBe('cursor-next');
+    });
+
+    it('should handle API error', async () => {
+      mockApiClient.listDataTables.mockRejectedValue(new Error('Server down'));
+
+      const result = await handlers.handleListTables({});
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Server down');
+    });
+  });
+
+  // ========================================================================
+  // handleGetTable
+  // ========================================================================
+  describe('handleGetTable', () => {
+    it('should get table successfully', async () => {
+      const table = { id: 'dt-1', name: 'My Table', columns: [] };
+      mockApiClient.getDataTable.mockResolvedValue(table);
+
+      const result = await handlers.handleGetTable({ tableId: 'dt-1' });
+
+      expect(result).toEqual({
+        success: true,
+        data: table,
+      });
+      expect(mockApiClient.getDataTable).toHaveBeenCalledWith('dt-1');
+    });
+
+    it('should return error on 404', async () => {
+      const notFoundError = new N8nApiError('Data table not found', 404, 'NOT_FOUND');
+      mockApiClient.getDataTable.mockRejectedValue(notFoundError);
+
+      const result = await handlers.handleGetTable({ tableId: 'dt-nonexistent' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('NOT_FOUND');
+    });
+
+    it('should return Zod validation error when tableId is missing', async () => {
+      const result = await handlers.handleGetTable({});
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+  });
+
+  // ========================================================================
+  // handleUpdateTable
+  // ========================================================================
+  describe('handleUpdateTable', () => {
+    it('should rename table successfully', async () => {
+      const updatedTable = { id: 'dt-1', name: 'Renamed Table' };
+      mockApiClient.updateDataTable.mockResolvedValue(updatedTable);
+
+      const result = await handlers.handleUpdateTable({ tableId: 'dt-1', name: 'Renamed Table' });
+
+      expect(result).toEqual({
+        success: true,
+        data: updatedTable,
+        message: 'Data table renamed to "Renamed Table"',
+      });
+      expect(mockApiClient.updateDataTable).toHaveBeenCalledWith('dt-1', { name: 'Renamed Table' });
+    });
+
+    it('should return Zod validation error when tableId is missing', async () => {
+      const result = await handlers.handleUpdateTable({ name: 'New Name' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+
+    it('should return error when API call fails', async () => {
+      mockApiClient.updateDataTable.mockRejectedValue(new Error('Update failed'));
+
+      const result = await handlers.handleUpdateTable({ tableId: 'dt-1', name: 'New Name' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Update failed');
+    });
+  });
+
+  // ========================================================================
+  // handleDeleteTable
+  // ========================================================================
+  describe('handleDeleteTable', () => {
+    it('should delete table successfully', async () => {
+      mockApiClient.deleteDataTable.mockResolvedValue(undefined);
+
+      const result = await handlers.handleDeleteTable({ tableId: 'dt-1' });
+
+      expect(result).toEqual({
+        success: true,
+        message: 'Data table dt-1 deleted successfully',
+      });
+      expect(mockApiClient.deleteDataTable).toHaveBeenCalledWith('dt-1');
+    });
+
+    it('should return error on 404', async () => {
+      const notFoundError = new N8nApiError('Data table not found', 404, 'NOT_FOUND');
+      mockApiClient.deleteDataTable.mockRejectedValue(notFoundError);
+
+      const result = await handlers.handleDeleteTable({ tableId: 'dt-nonexistent' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('NOT_FOUND');
+    });
+  });
+
+  // ========================================================================
+  // handleGetRows
+  // ========================================================================
+  describe('handleGetRows', () => {
+    it('should get rows with default params', async () => {
+      const rows = [
+        { id: 1, email: 'a@b.com', score: 10 },
+        { id: 2, email: 'c@d.com', score: 20 },
+      ];
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: rows, nextCursor: null });
+
+      const result = await handlers.handleGetRows({ tableId: 'dt-1' });
+
+      expect(result).toEqual({
+        success: true,
+        data: {
+          rows,
+          count: 2,
+          nextCursor: undefined,
+        },
+      });
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {});
+    });
+
+    it('should pass filter, sort, and search params', async () => {
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: [], nextCursor: null });
+
+      await handlers.handleGetRows({
+        tableId: 'dt-1',
+        limit: 50,
+        sortBy: 'name:asc',
+        search: 'john',
+      });
+
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {
+        limit: 50,
+        sortBy: encodeURIComponent('name:asc'),
+        search: 'john',
+      });
+    });
+
+    it('should serialize object filter to URL-encoded JSON string', async () => {
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: [], nextCursor: null });
+
+      const objectFilter = {
+        type: 'and' as const,
+        filters: [{ columnName: 'status', condition: 'eq' as const, value: 'active' }],
+      };
+
+      await handlers.handleGetRows({
+        tableId: 'dt-1',
+        filter: objectFilter,
+      });
+
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: encodeURIComponent(JSON.stringify(objectFilter)),
+      });
+    });
+
+    it('should URL-encode string filter', async () => {
+      mockApiClient.getDataTableRows.mockResolvedValue({ data: [], nextCursor: null });
+
+      const filterStr = '{"type":"and","filters":[]}';
+      await handlers.handleGetRows({
+        tableId: 'dt-1',
+        filter: filterStr,
+      });
+
+      expect(mockApiClient.getDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: encodeURIComponent(filterStr),
+      });
+    });
+  });
+
+  // ========================================================================
+  // handleInsertRows
+  // ========================================================================
+  describe('handleInsertRows', () => {
+    it('should insert rows successfully', async () => {
+      const insertResult = { insertedCount: 2, ids: [1, 2] };
+      mockApiClient.insertDataTableRows.mockResolvedValue(insertResult);
+
+      const result = await handlers.handleInsertRows({
+        tableId: 'dt-1',
+        data: [
+          { email: 'a@b.com', score: 10 },
+          { email: 'c@d.com', score: 20 },
+        ],
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: insertResult,
+        message: 'Rows inserted into data table dt-1',
+      });
+      expect(mockApiClient.insertDataTableRows).toHaveBeenCalledWith('dt-1', {
+        data: [
+          { email: 'a@b.com', score: 10 },
+          { email: 'c@d.com', score: 20 },
+        ],
+      });
+    });
+
+    it('should pass returnType to the API client', async () => {
+      const insertResult = [{ id: 1, email: 'a@b.com', score: 10 }];
+      mockApiClient.insertDataTableRows.mockResolvedValue(insertResult);
+
+      const result = await handlers.handleInsertRows({
+        tableId: 'dt-1',
+        data: [{ email: 'a@b.com', score: 10 }],
+        returnType: 'all',
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.data).toEqual(insertResult);
+      expect(mockApiClient.insertDataTableRows).toHaveBeenCalledWith('dt-1', {
+        data: [{ email: 'a@b.com', score: 10 }],
+        returnType: 'all',
+      });
+    });
+
+    it('should return Zod validation error when data is empty array', async () => {
+      const result = await handlers.handleInsertRows({
+        tableId: 'dt-1',
+        data: [],
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Invalid input');
+      expect(result.details).toHaveProperty('errors');
+    });
+  });
+
+  // ========================================================================
+  // handleUpdateRows
+  // ========================================================================
+  describe('handleUpdateRows', () => {
+    it('should update rows successfully', async () => {
+      const updateResult = { updatedCount: 3 };
+      mockApiClient.updateDataTableRows.mockResolvedValue(updateResult);
+
+      const filter = {
+        type: 'and' as const,
+        filters: [{ columnName: 'status', condition: 'eq' as const, value: 'inactive' }],
+      };
+
+      const result = await handlers.handleUpdateRows({
+        tableId: 'dt-1',
+        filter,
+        data: { status: 'active' },
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: updateResult,
+        message: 'Rows updated successfully',
+      });
+      expect(mockApiClient.updateDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter,
+        data: { status: 'active' },
+      });
+    });
+
+    it('should support dryRun mode', async () => {
+      const dryRunResult = { matchedCount: 5 };
+      mockApiClient.updateDataTableRows.mockResolvedValue(dryRunResult);
+
+      const filter = {
+        filters: [{ columnName: 'score', condition: 'lt' as const, value: 5 }],
+      };
+
+      const result = await handlers.handleUpdateRows({
+        tableId: 'dt-1',
+        filter,
+        data: { status: 'low' },
+        dryRun: true,
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.message).toBe('Dry run: rows matched (no changes applied)');
+      expect(mockApiClient.updateDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: { type: 'and', ...filter },
+        data: { status: 'low' },
+        dryRun: true,
+      });
+    });
+
+    it('should return error on API failure', async () => {
+      mockApiClient.updateDataTableRows.mockRejectedValue(new Error('Conflict'));
+
+      const result = await handlers.handleUpdateRows({
+        tableId: 'dt-1',
+        filter: { filters: [{ columnName: 'id', condition: 'eq' as const, value: 1 }] },
+        data: { name: 'test' },
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Conflict');
+    });
+  });
+
+  // ========================================================================
+  // handleUpsertRows
+  // ========================================================================
+  describe('handleUpsertRows', () => {
+    it('should upsert row successfully', async () => {
+      const upsertResult = { action: 'updated', row: { id: 1, email: 'a@b.com', score: 15 } };
+      mockApiClient.upsertDataTableRow.mockResolvedValue(upsertResult);
+
+      const filter = {
+        filters: [{ columnName: 'email', condition: 'eq' as const, value: 'a@b.com' }],
+      };
+
+      const result = await handlers.handleUpsertRows({
+        tableId: 'dt-1',
+        filter,
+        data: { score: 15 },
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: upsertResult,
+        message: 'Row upserted successfully',
+      });
+      expect(mockApiClient.upsertDataTableRow).toHaveBeenCalledWith('dt-1', {
+        filter: { type: 'and', ...filter },
+        data: { score: 15 },
+      });
+    });
+
+    it('should support dryRun mode', async () => {
+      const dryRunResult = { action: 'would_update', matchedRows: 1 };
+      mockApiClient.upsertDataTableRow.mockResolvedValue(dryRunResult);
+
+      const filter = {
+        filters: [{ columnName: 'email', condition: 'eq' as const, value: 'a@b.com' }],
+      };
+
+      const result = await handlers.handleUpsertRows({
+        tableId: 'dt-1',
+        filter,
+        data: { score: 20 },
+        dryRun: true,
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.message).toBe('Dry run: upsert previewed (no changes applied)');
+    });
+
+    it('should return error on API failure', async () => {
+      const apiError = new N8nApiError('Server error', 500, 'INTERNAL_ERROR');
+      mockApiClient.upsertDataTableRow.mockRejectedValue(apiError);
+
+      const result = await handlers.handleUpsertRows({
+        tableId: 'dt-1',
+        filter: { filters: [{ columnName: 'id', condition: 'eq' as const, value: 1 }] },
+        data: { name: 'test' },
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBeDefined();
+      expect(result.code).toBe('INTERNAL_ERROR');
+    });
+  });
+
+  // ========================================================================
+  // handleDeleteRows
+  // ========================================================================
+  describe('handleDeleteRows', () => {
+    it('should delete rows successfully', async () => {
+      const deleteResult = { deletedCount: 2 };
+      mockApiClient.deleteDataTableRows.mockResolvedValue(deleteResult);
+
+      const filter = {
+        filters: [{ columnName: 'status', condition: 'eq' as const, value: 'deleted' }],
+      };
+
+      const result = await handlers.handleDeleteRows({
+        tableId: 'dt-1',
+        filter,
+      });
+
+      expect(result).toEqual({
+        success: true,
+        data: deleteResult,
+        message: 'Rows deleted successfully',
+      });
+      expect(mockApiClient.deleteDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: encodeURIComponent(JSON.stringify({ type: 'and', ...filter })),
+      });
+    });
+
+    it('should URL-encode serialized filter for API call', async () => {
+      mockApiClient.deleteDataTableRows.mockResolvedValue({ deletedCount: 1 });
+
+      const filter = {
+        type: 'or' as const,
+        filters: [
+          { columnName: 'score', condition: 'lt' as const, value: 0 },
+          { columnName: 'status', condition: 'eq' as const, value: 'spam' },
+        ],
+      };
+
+      await handlers.handleDeleteRows({ tableId: 'dt-1', filter });
+
+      expect(mockApiClient.deleteDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: encodeURIComponent(JSON.stringify(filter)),
+      });
+    });
+
+    it('should support dryRun mode', async () => {
+      const dryRunResult = { matchedCount: 4 };
+      mockApiClient.deleteDataTableRows.mockResolvedValue(dryRunResult);
+
+      const filter = {
+        filters: [{ columnName: 'active', condition: 'eq' as const, value: false }],
+      };
+
+      const result = await handlers.handleDeleteRows({
+        tableId: 'dt-1',
+        filter,
+        dryRun: true,
+      });
+
+      expect(result.success).toBe(true);
+      expect(result.message).toBe('Dry run: rows matched for deletion (no changes applied)');
+      expect(mockApiClient.deleteDataTableRows).toHaveBeenCalledWith('dt-1', {
+        filter: encodeURIComponent(JSON.stringify({ type: 'and', ...filter })),
+        dryRun: true,
+      });
+    });
+  });
+});

tests/unit/mcp/handlers-n8n-manager.test.ts

@@ -100,6 +100,16 @@ describe('handlers-n8n-manager', () => {
       listExecutions: vi.fn(),
       deleteExecution: vi.fn(),
       healthCheck: vi.fn(),
+      createDataTable: vi.fn(),
+      listDataTables: vi.fn(),
+      getDataTable: vi.fn(),
+      updateDataTable: vi.fn(),
+      deleteDataTable: vi.fn(),
+      getDataTableRows: vi.fn(),
+      insertDataTableRows: vi.fn(),
+      updateDataTableRows: vi.fn(),
+      upsertDataTableRow: vi.fn(),
+      deleteDataTableRows: vi.fn(),
     };
 
     // Setup mock repository
@@ -631,6 +641,27 @@ describe('handlers-n8n-manager', () => {
         expect(result.details.errors[0]).toContain('Webhook');
       });
     });
+
+    it('should pass projectId to API when provided', async () => {
+      const testWorkflow = createTestWorkflow();
+      const input = {
+        name: 'Test Workflow',
+        nodes: testWorkflow.nodes,
+        connections: testWorkflow.connections,
+        projectId: 'project-abc-123',
+      };
+
+      mockApiClient.createWorkflow.mockResolvedValue(testWorkflow);
+
+      const result = await handlers.handleCreateWorkflow(input);
+
+      expect(result.success).toBe(true);
+      expect(mockApiClient.createWorkflow).toHaveBeenCalledWith(
+        expect.objectContaining({
+          projectId: 'project-abc-123',
+        })
+      );
+    });
   });
 
   describe('handleGetWorkflow', () => {
@@ -1081,10 +1112,10 @@ describe('handlers-n8n-manager', () => {
             enabled: true,
           },
           managementTools: {
-            count: 13,
+            count: 14,
             enabled: true,
           },
-          totalAvailable: 20,
+          totalAvailable: 21,
         },
       });
 

tests/unit/mcp/handlers-workflow-diff.test.ts

@@ -76,6 +76,7 @@ describe('handlers-workflow-diff', () => {
       listTags: vi.fn().mockResolvedValue({ data: [] }),
       createTag: vi.fn(),
       updateWorkflowTags: vi.fn().mockResolvedValue([]),
+      transferWorkflow: vi.fn().mockResolvedValue(undefined),
     };
 
     // Setup mock diff engine
@@ -1001,5 +1002,302 @@ describe('handlers-workflow-diff', () => {
         expect(mockApiClient.updateWorkflowTags).not.toHaveBeenCalled();
       });
     });
+
+    describe('Project Transfer via Dedicated API', () => {
+      it('should call transferWorkflow when diffResult has transferToProjectId', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-abc-123',
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'transferWorkflow', destinationProjectId: 'project-abc-123' }],
+        }, mockRepository);
+
+        expect(result.success).toBe(true);
+        expect(mockApiClient.transferWorkflow).toHaveBeenCalledWith('test-workflow-id', 'project-abc-123');
+        expect(result.message).toContain('transferred to project');
+      });
+
+      it('should NOT call transferWorkflow when transferToProjectId is absent', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'updateName', name: 'New Name' }],
+        }, mockRepository);
+
+        expect(mockApiClient.transferWorkflow).not.toHaveBeenCalled();
+      });
+
+      it('should return success false with saved true when transfer fails', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-bad-id',
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockRejectedValue(new Error('Project not found'));
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'transferWorkflow', destinationProjectId: 'project-bad-id' }],
+        }, mockRepository);
+
+        expect(result.success).toBe(false);
+        expect(result.saved).toBe(true);
+        expect(result.error).toBe('Workflow updated successfully but project transfer failed');
+        expect(result.details).toEqual({
+          workflowUpdated: true,
+          transferError: 'Project not found',
+        });
+      });
+
+      it('should return Unknown error when non-Error value is thrown during transfer', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-unknown',
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockRejectedValue('string error');
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{ type: 'transferWorkflow', destinationProjectId: 'project-unknown' }],
+        }, mockRepository);
+
+        expect(result.success).toBe(false);
+        expect(result.saved).toBe(true);
+        expect(result.details).toEqual({
+          workflowUpdated: true,
+          transferError: 'Unknown error',
+        });
+      });
+
+      it('should call transferWorkflow BEFORE activateWorkflow', async () => {
+        const testWorkflow = createTestWorkflow({ active: false });
+        const updatedWorkflow = { ...testWorkflow, active: false };
+        const activatedWorkflow = { ...testWorkflow, active: true };
+
+        const callOrder: string[] = [];
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 2,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-target',
+          shouldActivate: true,
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockImplementation(async () => {
+          callOrder.push('transfer');
+        });
+        mockApiClient.activateWorkflow = vi.fn().mockImplementation(async () => {
+          callOrder.push('activate');
+          return activatedWorkflow;
+        });
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [
+            { type: 'transferWorkflow', destinationProjectId: 'project-target' },
+            { type: 'activateWorkflow' },
+          ],
+        }, mockRepository);
+
+        expect(result.success).toBe(true);
+        expect(mockApiClient.transferWorkflow).toHaveBeenCalledWith('test-workflow-id', 'project-target');
+        expect(mockApiClient.activateWorkflow).toHaveBeenCalledWith('test-workflow-id');
+        expect(callOrder).toEqual(['transfer', 'activate']);
+      });
+
+      it('should skip activation when transfer fails', async () => {
+        const testWorkflow = createTestWorkflow({ active: false });
+        const updatedWorkflow = { ...testWorkflow, active: false };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 2,
+          message: 'Success',
+          errors: [],
+          transferToProjectId: 'project-fail',
+          shouldActivate: true,
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+        mockApiClient.transferWorkflow.mockRejectedValue(new Error('Transfer denied'));
+        mockApiClient.activateWorkflow = vi.fn();
+
+        const result = await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [
+            { type: 'transferWorkflow', destinationProjectId: 'project-fail' },
+            { type: 'activateWorkflow' },
+          ],
+        }, mockRepository);
+
+        expect(result.success).toBe(false);
+        expect(result.saved).toBe(true);
+        expect(result.error).toBe('Workflow updated successfully but project transfer failed');
+        expect(mockApiClient.activateWorkflow).not.toHaveBeenCalled();
+      });
+    });
+
+    describe('field name normalization', () => {
+      it('should normalize "name" to "nodeName" for updateNode operations', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{
+            type: 'updateNode',
+            name: 'HTTP Request',  // LLMs often use "name" instead of "nodeName"
+            updates: { 'parameters.url': 'https://new-url.com' },
+          }],
+        }, mockRepository);
+
+        // Verify the diff engine received nodeName (normalized from name)
+        expect(mockDiffEngine.applyDiff).toHaveBeenCalled();
+        const diffArgs = mockDiffEngine.applyDiff.mock.calls[0][1];
+        expect(diffArgs.operations[0].nodeName).toBe('HTTP Request');
+      });
+
+      it('should normalize "id" to "nodeId" for removeNode operations', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{
+            type: 'removeNode',
+            id: 'node2',  // LLMs may use "id" instead of "nodeId"
+          }],
+        }, mockRepository);
+
+        // Verify the diff engine received nodeId (normalized from id)
+        expect(mockDiffEngine.applyDiff).toHaveBeenCalled();
+        const diffArgs = mockDiffEngine.applyDiff.mock.calls[0][1];
+        expect(diffArgs.operations[0].nodeId).toBe('node2');
+      });
+
+      it('should NOT normalize "name" for updateName operations', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{
+            type: 'updateName',
+            name: 'New Workflow Name',  // This is the correct field for updateName
+          }],
+        }, mockRepository);
+
+        // Verify "name" stays as "name" (not moved to nodeName) for updateName
+        expect(mockDiffEngine.applyDiff).toHaveBeenCalled();
+        const diffArgs = mockDiffEngine.applyDiff.mock.calls[0][1];
+        expect(diffArgs.operations[0].name).toBe('New Workflow Name');
+        expect(diffArgs.operations[0].nodeName).toBeUndefined();
+      });
+
+      it('should prefer explicit "nodeName" over "name" alias', async () => {
+        const testWorkflow = createTestWorkflow();
+        const updatedWorkflow = { ...testWorkflow };
+
+        mockApiClient.getWorkflow.mockResolvedValue(testWorkflow);
+        mockDiffEngine.applyDiff.mockResolvedValue({
+          success: true,
+          workflow: updatedWorkflow,
+          operationsApplied: 1,
+          message: 'Success',
+          errors: [],
+        });
+        mockApiClient.updateWorkflow.mockResolvedValue(updatedWorkflow);
+
+        await handleUpdatePartialWorkflow({
+          id: 'test-workflow-id',
+          operations: [{
+            type: 'updateNode',
+            nodeName: 'HTTP Request',  // Explicit nodeName provided
+            name: 'Should Be Ignored',  // Should NOT override nodeName
+            updates: { 'parameters.url': 'https://new-url.com' },
+          }],
+        }, mockRepository);
+
+        expect(mockDiffEngine.applyDiff).toHaveBeenCalled();
+        const diffArgs = mockDiffEngine.applyDiff.mock.calls[0][1];
+        expect(diffArgs.operations[0].nodeName).toBe('HTTP Request');
+      });
+    });
   });
-});
+});

tests/unit/mcp/parameter-validation.test.ts

@@ -542,6 +542,9 @@ describe('Parameter Validation', () => {
       await expect(server.testExecuteTool('n8n_test_workflow', {}))
         .rejects.toThrow('Missing required parameters for n8n_test_workflow: workflowId');
 
+      await expect(server.testExecuteTool('n8n_manage_datatable', {}))
+        .rejects.toThrow('n8n_manage_datatable: Validation failed:\n  • action: action is required');
+
       for (const tool of n8nToolsWithRequiredParams) {
         await expect(server.testExecuteTool(tool.name, tool.args))
           .rejects.toThrow(tool.expected);

tests/unit/services/n8n-api-client.test.ts

@@ -297,7 +297,7 @@ describe('N8nApiClient', () => {
         expect.fail('Should have thrown an error');
       } catch (err) {
         expect(err).toBeInstanceOf(N8nNotFoundError);
-        expect((err as N8nNotFoundError).message).toContain('not found');
+        expect((err as N8nNotFoundError).message.toLowerCase()).toContain('not found');
         expect((err as N8nNotFoundError).statusCode).toBe(404);
       }
     });
@@ -380,7 +380,7 @@ describe('N8nApiClient', () => {
         expect.fail('Should have thrown an error');
       } catch (err) {
         expect(err).toBeInstanceOf(N8nNotFoundError);
-        expect((err as N8nNotFoundError).message).toContain('not found');
+        expect((err as N8nNotFoundError).message.toLowerCase()).toContain('not found');
         expect((err as N8nNotFoundError).statusCode).toBe(404);
       }
     });
@@ -432,7 +432,7 @@ describe('N8nApiClient', () => {
         expect.fail('Should have thrown an error');
       } catch (err) {
         expect(err).toBeInstanceOf(N8nNotFoundError);
-        expect((err as N8nNotFoundError).message).toContain('not found');
+        expect((err as N8nNotFoundError).message.toLowerCase()).toContain('not found');
         expect((err as N8nNotFoundError).statusCode).toBe(404);
       }
     });
@@ -501,7 +501,7 @@ describe('N8nApiClient', () => {
         expect.fail('Should have thrown an error');
       } catch (err) {
         expect(err).toBeInstanceOf(N8nNotFoundError);
-        expect((err as N8nNotFoundError).message).toContain('not found');
+        expect((err as N8nNotFoundError).message.toLowerCase()).toContain('not found');
         expect((err as N8nNotFoundError).statusCode).toBe(404);
       }
     });
@@ -1250,6 +1250,413 @@ describe('N8nApiClient', () => {
     });
   });
 
+  describe('transferWorkflow', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should transfer workflow successfully via PUT', async () => {
+      mockAxiosInstance.put.mockResolvedValue({ data: undefined });
+
+      await client.transferWorkflow('123', 'project-456');
+
+      expect(mockAxiosInstance.put).toHaveBeenCalledWith(
+        '/workflows/123/transfer',
+        { destinationProjectId: 'project-456' }
+      );
+    });
+
+    it('should throw N8nNotFoundError on 404', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 404, data: { message: 'Workflow not found' } }
+      };
+      await mockAxiosInstance.simulateError('put', error);
+
+      try {
+        await client.transferWorkflow('123', 'project-456');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nNotFoundError);
+        expect((err as N8nNotFoundError).message.toLowerCase()).toContain('not found');
+        expect((err as N8nNotFoundError).statusCode).toBe(404);
+      }
+    });
+
+    it('should throw appropriate error on 403 forbidden', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 403, data: { message: 'Forbidden' } }
+      };
+      await mockAxiosInstance.simulateError('put', error);
+
+      try {
+        await client.transferWorkflow('123', 'project-456');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nApiError);
+        expect((err as N8nApiError).statusCode).toBe(403);
+      }
+    });
+  });
+
+  describe('createDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should create data table with name and columns', async () => {
+      const params = {
+        name: 'My Table',
+        columns: [
+          { name: 'email', type: 'string' as const },
+          { name: 'count', type: 'number' as const },
+        ],
+      };
+      const createdTable = { id: 'dt-1', name: 'My Table', columns: [] };
+
+      mockAxiosInstance.post.mockResolvedValue({ data: createdTable });
+
+      const result = await client.createDataTable(params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables', params);
+      expect(result).toEqual(createdTable);
+    });
+
+    it('should create data table without columns', async () => {
+      const params = { name: 'Empty Table' };
+      const createdTable = { id: 'dt-2', name: 'Empty Table' };
+
+      mockAxiosInstance.post.mockResolvedValue({ data: createdTable });
+
+      const result = await client.createDataTable(params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables', params);
+      expect(result).toEqual(createdTable);
+    });
+
+    it('should handle 400 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid table name' } },
+      };
+      await mockAxiosInstance.simulateError('post', error);
+
+      try {
+        await client.createDataTable({ name: '' });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).message).toBe('Invalid table name');
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('listDataTables', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should list data tables successfully', async () => {
+      const response = { data: [{ id: 'dt-1', name: 'Table One' }], nextCursor: 'abc' };
+      mockAxiosInstance.get.mockResolvedValue({ data: response });
+
+      const result = await client.listDataTables({ limit: 10, cursor: 'xyz' });
+
+      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/data-tables', { params: { limit: 10, cursor: 'xyz' } });
+      expect(result).toEqual(response);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('get', error);
+
+      try {
+        await client.listDataTables();
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
+  describe('getDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should get data table successfully', async () => {
+      const table = { id: 'dt-1', name: 'My Table', columns: [] };
+      mockAxiosInstance.get.mockResolvedValue({ data: table });
+
+      const result = await client.getDataTable('dt-1');
+
+      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/data-tables/dt-1');
+      expect(result).toEqual(table);
+    });
+
+    it('should handle 404 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 404, data: { message: 'Data table not found' } },
+      };
+      await mockAxiosInstance.simulateError('get', error);
+
+      try {
+        await client.getDataTable('dt-nonexistent');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nNotFoundError);
+        expect((err as N8nNotFoundError).statusCode).toBe(404);
+      }
+    });
+  });
+
+  describe('updateDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should update data table successfully', async () => {
+      const updated = { id: 'dt-1', name: 'Renamed' };
+      mockAxiosInstance.patch.mockResolvedValue({ data: updated });
+
+      const result = await client.updateDataTable('dt-1', { name: 'Renamed' });
+
+      expect(mockAxiosInstance.patch).toHaveBeenCalledWith('/data-tables/dt-1', { name: 'Renamed' });
+      expect(result).toEqual(updated);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid name' } },
+      };
+      await mockAxiosInstance.simulateError('patch', error);
+
+      try {
+        await client.updateDataTable('dt-1', { name: '' });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('deleteDataTable', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should delete data table successfully', async () => {
+      mockAxiosInstance.delete.mockResolvedValue({ data: {} });
+
+      await client.deleteDataTable('dt-1');
+
+      expect(mockAxiosInstance.delete).toHaveBeenCalledWith('/data-tables/dt-1');
+    });
+
+    it('should handle 404 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 404, data: { message: 'Data table not found' } },
+      };
+      await mockAxiosInstance.simulateError('delete', error);
+
+      try {
+        await client.deleteDataTable('dt-nonexistent');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nNotFoundError);
+        expect((err as N8nNotFoundError).statusCode).toBe(404);
+      }
+    });
+  });
+
+  describe('getDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should get data table rows with params', async () => {
+      const response = { data: [{ id: 1, email: 'a@b.com' }], nextCursor: null };
+      mockAxiosInstance.get.mockResolvedValue({ data: response });
+
+      const params = { limit: 50, sortBy: 'email:asc', search: 'john' };
+      const result = await client.getDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/data-tables/dt-1/rows', { params });
+      expect(result).toEqual(response);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('get', error);
+
+      try {
+        await client.getDataTableRows('dt-1');
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
+  describe('insertDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should insert data table rows successfully', async () => {
+      const insertResult = { insertedCount: 2 };
+      mockAxiosInstance.post.mockResolvedValue({ data: insertResult });
+
+      const params = { data: [{ email: 'a@b.com' }, { email: 'c@d.com' }], returnType: 'count' as const };
+      const result = await client.insertDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables/dt-1/rows', params);
+      expect(result).toEqual(insertResult);
+    });
+
+    it('should handle 400 error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid row data' } },
+      };
+      await mockAxiosInstance.simulateError('post', error);
+
+      try {
+        await client.insertDataTableRows('dt-1', { data: [{}] });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).message).toBe('Invalid row data');
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('updateDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should update data table rows successfully', async () => {
+      const updateResult = { updatedCount: 3 };
+      mockAxiosInstance.patch.mockResolvedValue({ data: updateResult });
+
+      const params = {
+        filter: { type: 'and' as const, filters: [{ columnName: 'status', condition: 'eq' as const, value: 'old' }] },
+        data: { status: 'new' },
+      };
+      const result = await client.updateDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.patch).toHaveBeenCalledWith('/data-tables/dt-1/rows/update', params);
+      expect(result).toEqual(updateResult);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('patch', error);
+
+      try {
+        await client.updateDataTableRows('dt-1', {
+          filter: { type: 'and', filters: [{ columnName: 'id', condition: 'eq', value: 1 }] },
+          data: { name: 'test' },
+        });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
+  describe('upsertDataTableRow', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should upsert data table row successfully', async () => {
+      const upsertResult = { action: 'updated', row: { id: 1, email: 'a@b.com' } };
+      mockAxiosInstance.post.mockResolvedValue({ data: upsertResult });
+
+      const params = {
+        filter: { type: 'and' as const, filters: [{ columnName: 'email', condition: 'eq' as const, value: 'a@b.com' }] },
+        data: { score: 15 },
+      };
+      const result = await client.upsertDataTableRow('dt-1', params);
+
+      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/data-tables/dt-1/rows/upsert', params);
+      expect(result).toEqual(upsertResult);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 400, data: { message: 'Invalid upsert params' } },
+      };
+      await mockAxiosInstance.simulateError('post', error);
+
+      try {
+        await client.upsertDataTableRow('dt-1', {
+          filter: { type: 'and', filters: [{ columnName: 'id', condition: 'eq', value: 1 }] },
+          data: { name: 'test' },
+        });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nValidationError);
+        expect((err as N8nValidationError).statusCode).toBe(400);
+      }
+    });
+  });
+
+  describe('deleteDataTableRows', () => {
+    beforeEach(() => {
+      client = new N8nApiClient(defaultConfig);
+    });
+
+    it('should delete data table rows successfully', async () => {
+      const deleteResult = { deletedCount: 2 };
+      mockAxiosInstance.delete.mockResolvedValue({ data: deleteResult });
+
+      const params = { filter: '{"type":"and","filters":[]}', dryRun: false };
+      const result = await client.deleteDataTableRows('dt-1', params);
+
+      expect(mockAxiosInstance.delete).toHaveBeenCalledWith('/data-tables/dt-1/rows/delete', { params });
+      expect(result).toEqual(deleteResult);
+    });
+
+    it('should handle error', async () => {
+      const error = {
+        message: 'Request failed',
+        response: { status: 500, data: { message: 'Internal server error' } },
+      };
+      await mockAxiosInstance.simulateError('delete', error);
+
+      try {
+        await client.deleteDataTableRows('dt-1', { filter: '{}' });
+        expect.fail('Should have thrown an error');
+      } catch (err) {
+        expect(err).toBeInstanceOf(N8nServerError);
+        expect((err as N8nServerError).statusCode).toBe(500);
+      }
+    });
+  });
+
   describe('interceptors', () => {
     let requestInterceptor: any;
     let responseInterceptor: any;
@@ -1317,4 +1724,4 @@ describe('N8nApiClient', () => {
       expect(result.message).toBe('Bad request');
     });
   });
-});
+});

tests/unit/services/n8n-validation.test.ts

@@ -1096,6 +1096,83 @@ describe('n8n-validation', () => {
         expect(disconnectedErrors).toHaveLength(0);
       });
 
+      it('should NOT flag nodes as disconnected when connected via ai_outputParser', () => {
+        const workflow = {
+          name: 'AI Output Parser Workflow',
+          nodes: [
+            {
+              id: 'agent-1',
+              name: 'AI Agent',
+              type: '@n8n/n8n-nodes-langchain.agent',
+              typeVersion: 1.6,
+              position: [500, 300] as [number, number],
+              parameters: {},
+            },
+            {
+              id: 'parser-1',
+              name: 'Structured Output Parser',
+              type: '@n8n/n8n-nodes-langchain.outputParserStructured',
+              typeVersion: 1,
+              position: [300, 400] as [number, number],
+              parameters: {},
+            },
+          ],
+          connections: {
+            'Structured Output Parser': {
+              ai_outputParser: [[{ node: 'AI Agent', type: 'ai_outputParser', index: 0 }]],
+            },
+          },
+        };
+
+        const errors = validateWorkflowStructure(workflow);
+        const disconnectedErrors = errors.filter(e => e.includes('Disconnected'));
+        expect(disconnectedErrors).toHaveLength(0);
+      });
+
+      it('should NOT flag nodes as disconnected when connected via ai_document or ai_textSplitter', () => {
+        const workflow = {
+          name: 'Document Processing Workflow',
+          nodes: [
+            {
+              id: 'vs-1',
+              name: 'Pinecone Vector Store',
+              type: '@n8n/n8n-nodes-langchain.vectorStorePinecone',
+              typeVersion: 1,
+              position: [500, 300] as [number, number],
+              parameters: {},
+            },
+            {
+              id: 'doc-1',
+              name: 'Default Data Loader',
+              type: '@n8n/n8n-nodes-langchain.documentDefaultDataLoader',
+              typeVersion: 1,
+              position: [300, 400] as [number, number],
+              parameters: {},
+            },
+            {
+              id: 'splitter-1',
+              name: 'Text Splitter',
+              type: '@n8n/n8n-nodes-langchain.textSplitterRecursiveCharacterTextSplitter',
+              typeVersion: 1,
+              position: [100, 400] as [number, number],
+              parameters: {},
+            },
+          ],
+          connections: {
+            'Default Data Loader': {
+              ai_document: [[{ node: 'Pinecone Vector Store', type: 'ai_document', index: 0 }]],
+            },
+            'Text Splitter': {
+              ai_textSplitter: [[{ node: 'Default Data Loader', type: 'ai_textSplitter', index: 0 }]],
+            },
+          },
+        };
+
+        const errors = validateWorkflowStructure(workflow);
+        const disconnectedErrors = errors.filter(e => e.includes('Disconnected'));
+        expect(disconnectedErrors).toHaveLength(0);
+      });
+
       it('should still flag truly disconnected nodes in AI workflows', () => {
         const workflow = {
           name: 'AI Workflow with Disconnected Node',

tests/unit/services/node-specific-validators.test.ts

@@ -1912,6 +1912,55 @@ return [{"json": {"result": result}}]
         });
       });
 
+      it('should not error on primitive return inside helper functions', () => {
+        context.config = {
+          language: 'javaScript',
+          jsCode: 'function isValid(item) { return false; }\nconst items = $input.all();\nreturn items.filter(isValid).map(i => ({json: i.json}));'
+        };
+
+        NodeSpecificValidators.validateCode(context);
+
+        const primitiveErrors = context.errors.filter(e => e.message === 'Cannot return primitive values directly');
+        expect(primitiveErrors).toHaveLength(0);
+      });
+
+      it('should not error on primitive return inside arrow function helpers', () => {
+        context.config = {
+          language: 'javaScript',
+          jsCode: 'const isValid = (item) => { return false; };\nreturn $input.all().filter(isValid).map(i => ({json: i.json}));'
+        };
+
+        NodeSpecificValidators.validateCode(context);
+
+        const primitiveErrors = context.errors.filter(e => e.message === 'Cannot return primitive values directly');
+        expect(primitiveErrors).toHaveLength(0);
+      });
+
+      it('should not error on primitive return inside async function helpers', () => {
+        context.config = {
+          language: 'javaScript',
+          jsCode: 'async function fetchData(url) { return null; }\nconst data = await fetchData("https://api.example.com");\nreturn [{json: {data}}];'
+        };
+
+        NodeSpecificValidators.validateCode(context);
+
+        const primitiveErrors = context.errors.filter(e => e.message === 'Cannot return primitive values directly');
+        expect(primitiveErrors).toHaveLength(0);
+      });
+
+      it('should still error on primitive return without helper functions', () => {
+        context.config = {
+          language: 'javaScript',
+          jsCode: 'return "success";'
+        };
+
+        NodeSpecificValidators.validateCode(context);
+
+        expect(context.errors).toContainEqual(expect.objectContaining({
+          message: 'Cannot return primitive values directly'
+        }));
+      });
+
       it('should error on Python primitive return', () => {
         context.config = {
           language: 'python',
@@ -2038,6 +2087,30 @@ return [{"json": {"result": result}}]
         });
       });
 
+      it('should not warn about $() node reference syntax', () => {
+        context.config = {
+          language: 'javaScript',
+          jsCode: 'const data = $("Previous Node").first().json;\nreturn [{json: data}];'
+        };
+
+        NodeSpecificValidators.validateCode(context);
+
+        const dollarWarnings = context.warnings.filter(w => w.message === 'Invalid $ usage detected');
+        expect(dollarWarnings).toHaveLength(0);
+      });
+
+      it('should not warn about $_ variables', () => {
+        context.config = {
+          language: 'javaScript',
+          jsCode: 'const $_temp = 1;\nreturn [{json: {value: $_temp}}];'
+        };
+
+        NodeSpecificValidators.validateCode(context);
+
+        const dollarWarnings = context.warnings.filter(w => w.message === 'Invalid $ usage detected');
+        expect(dollarWarnings).toHaveLength(0);
+      });
+
       it('should correct helpers usage', () => {
         context.config = {
           language: 'javaScript',

tests/unit/services/workflow-diff-engine.test.ts

@@ -17,7 +17,8 @@ import {
   AddTagOperation,
   RemoveTagOperation,
   CleanStaleConnectionsOperation,
-  ReplaceConnectionsOperation
+  ReplaceConnectionsOperation,
+  TransferWorkflowOperation
 } from '@/types/workflow-diff';
 import { Workflow } from '@/types/n8n-api';
 
@@ -4882,4 +4883,258 @@ describe('WorkflowDiffEngine', () => {
       expect(result.workflow.connections['Source Node']['main'][0][0].type).toBe('main');
     });
   });
-});
+
+  describe('null value property deletion', () => {
+    it('should delete a property when value is null', async () => {
+      const node = baseWorkflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      (node as any).continueOnFail = true;
+
+      const operation: UpdateNodeOperation = {
+        type: 'updateNode',
+        nodeName: 'HTTP Request',
+        updates: { continueOnFail: null }
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      const updatedNode = result.workflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      expect('continueOnFail' in updatedNode).toBe(false);
+    });
+
+    it('should delete a nested property when value is null', async () => {
+      const node = baseWorkflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      (node as any).parameters = { url: 'https://example.com', authentication: 'basic' };
+
+      const operation: UpdateNodeOperation = {
+        type: 'updateNode',
+        nodeName: 'HTTP Request',
+        updates: { 'parameters.authentication': null }
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      const updatedNode = result.workflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      expect((updatedNode as any).parameters.url).toBe('https://example.com');
+      expect('authentication' in (updatedNode as any).parameters).toBe(false);
+    });
+
+    it('should set property normally when value is not null', async () => {
+      const operation: UpdateNodeOperation = {
+        type: 'updateNode',
+        nodeName: 'HTTP Request',
+        updates: { continueOnFail: true }
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      const updatedNode = result.workflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      expect((updatedNode as any).continueOnFail).toBe(true);
+    });
+
+    it('should be a no-op when deleting a non-existent property', async () => {
+      const node = baseWorkflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      const originalKeys = Object.keys(node).sort();
+
+      const operation: UpdateNodeOperation = {
+        type: 'updateNode',
+        nodeName: 'HTTP Request',
+        updates: { nonExistentProp: null }
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      const updatedNode = result.workflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      expect('nonExistentProp' in updatedNode).toBe(false);
+    });
+
+    it('should skip intermediate object creation when deleting from non-existent parent path', async () => {
+      const operation: UpdateNodeOperation = {
+        type: 'updateNode',
+        nodeName: 'HTTP Request',
+        updates: { 'nonExistent.deeply.nested.prop': null }
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      const updatedNode = result.workflow.nodes.find((n: any) => n.name === 'HTTP Request')!;
+      expect('nonExistent' in updatedNode).toBe(false);
+    });
+  });
+
+  describe('transferWorkflow operation', () => {
+    it('should set transferToProjectId in result for valid transferWorkflow', async () => {
+      const operation: TransferWorkflowOperation = {
+        type: 'transferWorkflow',
+        destinationProjectId: 'project-abc-123'
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.transferToProjectId).toBe('project-abc-123');
+    });
+
+    it('should fail validation when destinationProjectId is empty', async () => {
+      const operation: TransferWorkflowOperation = {
+        type: 'transferWorkflow',
+        destinationProjectId: ''
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(false);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0].message).toContain('destinationProjectId');
+    });
+
+    it('should fail validation when destinationProjectId is undefined', async () => {
+      const operation = {
+        type: 'transferWorkflow',
+        destinationProjectId: undefined
+      } as any as TransferWorkflowOperation;
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(false);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0].message).toContain('destinationProjectId');
+    });
+
+    it('should not include transferToProjectId when no transferWorkflow operation is present', async () => {
+      const operation: UpdateNameOperation = {
+        type: 'updateName',
+        name: 'Renamed Workflow'
+      };
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations: [operation]
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.transferToProjectId).toBeUndefined();
+    });
+
+    it('should combine updateName and transferWorkflow operations', async () => {
+      const operations: WorkflowDiffOperation[] = [
+        {
+          type: 'updateName',
+          name: 'Transferred Workflow'
+        } as UpdateNameOperation,
+        {
+          type: 'transferWorkflow',
+          destinationProjectId: 'project-xyz-789'
+        } as TransferWorkflowOperation
+      ];
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.operationsApplied).toBe(2);
+      expect(result.workflow!.name).toBe('Transferred Workflow');
+      expect(result.transferToProjectId).toBe('project-xyz-789');
+    });
+
+    it('should combine removeTag and transferWorkflow in continueOnError mode', async () => {
+      const operations: WorkflowDiffOperation[] = [
+        {
+          type: 'removeTag',
+          tag: 'non-existent-tag'
+        } as RemoveTagOperation,
+        {
+          type: 'transferWorkflow',
+          destinationProjectId: 'project-target-456'
+        } as TransferWorkflowOperation
+      ];
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations,
+        continueOnError: true
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(true);
+      expect(result.transferToProjectId).toBe('project-target-456');
+    });
+
+    it('should fail entire batch in atomic mode when transferWorkflow has empty destinationProjectId alongside updateName', async () => {
+      const operations: WorkflowDiffOperation[] = [
+        {
+          type: 'updateName',
+          name: 'Should Not Apply'
+        } as UpdateNameOperation,
+        {
+          type: 'transferWorkflow',
+          destinationProjectId: ''
+        } as TransferWorkflowOperation
+      ];
+
+      const request: WorkflowDiffRequest = {
+        id: 'test-workflow',
+        operations
+      };
+
+      const result = await diffEngine.applyDiff(baseWorkflow, request);
+
+      expect(result.success).toBe(false);
+      expect(result.errors).toBeDefined();
+      expect(result.errors![0].message).toContain('destinationProjectId');
+      // In atomic mode, the workflow should not be returned since the batch failed
+      expect(result.workflow).toBeUndefined();
+    });
+  });
+});