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feat: add n8n_generate_workflow tool for hosted workflow generation

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Add new MCP tool that enables AI-powered workflow generation from natural
language descriptions. Uses handler delegation pattern — hosting environments
inject a GenerateWorkflowHandler via EngineOptions, self-hosted instances
receive a hosted-only informational response.

Handler flows through N8NMCPEngine → SingleSessionHTTPServer →
N8NDocumentationMCPServer with helpers for createWorkflow, validateWorkflow,
autofixWorkflow, and getWorkflow.

Includes full tool documentation, tests, and corrected tools overview count.

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

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
czlonkowski
2026-03-31 12:32:31 +02:00
parent 3417c6701c
commit 198e773bb3
81 changed files with 784 additions and 177 deletions
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7
dist/mcp/tools-documentation.js vendored
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@@ -98,7 +98,7 @@ When working with Code nodes, always start by calling the relevant guide:
- validate_node({nodeType: "nodes-base.slack", config: {...}}) - Full validation with errors/warnings/suggestions
- validate_workflow({workflow: {...}}) - Validate entire workflow
## Tool Categories (19 Tools Total)
## Tool Categories (21 Tools Total)
**Discovery Tools** (1 tool)
- search_nodes - Full-text search across all nodes (supports OR, AND, FUZZY modes)
@@ -121,8 +121,9 @@ When working with Code nodes, always start by calling the relevant guide:
- searchMode='by_nodes': Find templates using specific nodes
- searchMode='by_task': Curated task-based templates
- searchMode='by_metadata': Filter by complexity/services
- searchMode='patterns': Workflow pattern summaries from 2,700+ templates
**n8n API Tools** (13 tools, requires N8N_API_URL configuration)
**n8n API Tools** (15 tools, requires N8N_API_URL configuration)
- n8n_create_workflow - Create new workflows
- n8n_get_workflow - Get workflow with mode='full'/'details'/'structure'/'minimal'
- n8n_update_full_workflow - Full workflow replacement
@@ -136,6 +137,8 @@ When working with Code nodes, always start by calling the relevant guide:
- n8n_health_check - Check n8n API connectivity
- n8n_workflow_versions - Version history and rollback
- n8n_deploy_template - Deploy templates directly to n8n instance
- n8n_manage_datatable - Manage data tables and rows
- n8n_generate_workflow - Generate workflow from natural language description
## Performance Characteristics
- Instant (<10ms): search_nodes, get_node (minimal/standard)