This commit adds automatic detection of n8n server version and filters
workflow settings properties based on what the target version supports.
Changes:
- Add n8n-version.ts service for version detection via /rest/settings
- Fix nested response structure handling (data.data.versionCli)
- Add N8nVersionInfo and N8nSettingsData types
- Update N8nApiClient with getVersion() and version-aware filtering
- Clean workflow settings before API update based on detected version
Version compatibility:
- n8n < 1.37.0: 7 core properties only
- n8n 1.37.0+: adds executionOrder
- n8n 1.119.0+: adds callerPolicy, callerIds, timeSavedPerExecution, availableInMCP
Fixes#466
* chore: bump version to 2.22.9
Updated version number to trigger release workflow after n8n 1.118.1 update.
Previous version 2.22.8 was already released on 2025-10-28, so the release
workflow did not trigger when PR #393 was merged.
Changes:
- Bump package.json version from 2.22.8 to 2.22.9
- Update CHANGELOG.md with correct version and date
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* docs: update n8n update workflow with lessons learned
Added new fast workflow section based on 2025-11-04 update experience:
- CRITICAL: Check existing releases first to avoid version conflicts
- Skip local tests - CI runs them anyway (saves 2-3 min)
- Integration test failures with 'unauthorized' are infrastructure issues
- Release workflow only triggers on version CHANGE
- Updated time estimates for fast vs full workflow
This will make future n8n updates smoother and faster.
Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix: exclude versionCounter from workflow updates for n8n 1.118.1
n8n 1.118.1 returns versionCounter in GET /workflows/{id} responses but
rejects it in PUT /workflows/{id} updates with the error:
'request/body must NOT have additional properties'
This was causing all integration tests to fail in CI with n8n 1.118.1.
Changes:
- Added versionCounter to excluded properties in cleanWorkflowForUpdate()
- Tested and verified fix works with n8n 1.118.1 test instance
Fixes CI failures in PR #395
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* chore: improve versionCounter fix with types and tests
- Add versionCounter type definition to Workflow and WorkflowExport interfaces
- Add comprehensive test coverage for versionCounter exclusion
- Update CHANGELOG with detailed bug fix documentation
Addresses code review feedback from PR #395
Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
---------
Co-authored-by: Claude <noreply@anthropic.com>
Replace generic "Please try again later or contact support" error messages
with actionable guidance that directs users to use n8n_get_execution with
mode='preview' for efficient debugging.
## Changes
### Core Functionality
- Add formatExecutionError() to create execution-specific error messages
- Add formatNoExecutionError() for cases without execution context
- Update handleTriggerWebhookWorkflow to extract execution/workflow IDs from errors
- Modify getUserFriendlyErrorMessage to avoid generic SERVER_ERROR message
### Type Updates
- Add executionId and workflowId optional fields to McpToolResponse
- Add errorHandling optional field to ToolDocumentation.full
### Error Message Format
**With Execution ID:**
"Workflow {workflowId} execution {executionId} failed. Use n8n_get_execution({id: '{executionId}', mode: 'preview'}) to investigate the error."
**Without Execution ID:**
"Workflow failed to execute. Use n8n_list_executions to find recent executions, then n8n_get_execution with mode='preview' to investigate."
### Testing
- Add comprehensive tests in tests/unit/utils/n8n-errors.test.ts (20 tests)
- Add 10 new tests for handleTriggerWebhookWorkflow in handlers-n8n-manager.test.ts
- Update existing health check test to expect new error message format
- All tests passing (52 total tests)
### Documentation
- Update n8n-trigger-webhook-workflow tool documentation with errorHandling section
- Document why mode='preview' is recommended (fast, efficient, safe)
- Add example error responses and investigation workflow
## Why mode='preview'?
- Fast: <50ms response time
- Efficient: ~500 tokens (vs 50K+ for full mode)
- Safe: No timeout or token limit risks
- Informative: Shows structure, counts, and error details
## Breaking Changes
None - backward compatible improvement to error messages only.
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Co-Authored-By: Claude <noreply@anthropic.com>
Implements comprehensive execution data filtering system to enable AI agents
to inspect large workflow executions without exceeding token limits.
Features:
- Preview mode: Shows structure, counts, and size estimates (~500 tokens)
- Summary mode: Returns 2 sample items per node (~2-5K tokens)
- Filtered mode: Granular control with itemsLimit and nodeNames
- Full mode: Complete data retrieval (explicit opt-in)
- Smart recommendations based on data size analysis
- Structure-only mode (itemsLimit: 0) for schema inspection
- 100% backward compatibility with legacy includeData parameter
Technical improvements:
- New ExecutionProcessor service with intelligent filtering logic
- Type-safe implementation with Record<string, unknown> over any
- Comprehensive validation and error handling
- 33 unit tests with 78% coverage
- Constants-based thresholds for easy tuning
Bug fixes:
- Fixed preview mode API data fetching to enable structure analysis
- Validates and caps itemsLimit to prevent abuse
Impact:
- Reduces token usage by 80-95% for large datasets (50+ items)
- Prevents token overflow when inspecting workflow executions
- Enables recommended workflow: preview → recommendation → targeted fetch
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Root cause: AI agents were placing error handling properties inside `parameters` instead of at node level
Major changes:
- Enhanced workflow validator to check for ALL node-level properties (expanded from 6 to 11)
- Added validation for onError property values and deprecation warnings for continueOnFail
- Updated all examples to use modern error handling (onError instead of continueOnFail)
- Added comprehensive node-level properties documentation in tools_documentation
- Enhanced MCP tool documentation for n8n_create_workflow and n8n_update_partial_workflow
- Added test script demonstrating correct node-level property usage
Node-level properties now validated:
- credentials, disabled, notes, notesInFlow, executeOnce
- onError, retryOnFail, maxTries, waitBetweenTries, alwaysOutputData
- continueOnFail (deprecated)
Validation improvements:
- Detects misplaced properties and provides clear fix examples
- Shows complete node structure when properties are incorrectly placed
- Type validation for all node-level boolean and string properties
- Smart error messages with correct placement guidance
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BREAKING CHANGES:
- Renamed n8n_update_workflow to n8n_update_full_workflow for clarity
NEW FEATURES:
- Added n8n_update_partial_workflow tool for diff-based workflow editing
- Implemented WorkflowDiffEngine with 13 operation types
- Added transactional updates with two-pass processing
- Maximum 5 operations per request for reliability
- Operations can be in any order - engine handles dependencies
- Added validateOnly mode for testing changes before applying
- 80-90% token savings by only sending changes
IMPROVEMENTS:
- Enhanced tool description with comprehensive parameter documentation
- Added clear examples for simple and complex use cases
- Improved error messages and validation
- Added extensive test coverage for all operations
DOCUMENTATION:
- Added workflow-diff-examples.md with usage patterns
- Added transactional-updates-example.md showing before/after
- Updated README.md with v2.7.0 features
- Updated CLAUDE.md with latest changes
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