Initial marketplace: n8n-skills + doc-converter plugins

Marketplace with 2 plugins: - n8n-skills v1.0.0 (7 skills for n8n workflow automation) - doc-converter v1.0.0 (DOCX/PDF to HTML via Gemini Vision)
2026-02-10 19:47:49 +00:00
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+# Configuration Validation Tools Guide
+
+Complete guide for validating node configurations and workflows.
+
+---
+
+## Validation Philosophy
+
+**Validate early, validate often**
+
+Validation is typically iterative with validate → fix cycles
+
+---
+
+## validate_node (UNIFIED VALIDATION)
+
+The `validate_node` tool provides all validation capabilities with different modes.
+
+### Quick Check (mode="minimal")
+
+**Speed**: <50ms
+
+**Use when**: Checking what fields are required
+
+```javascript
+validate_node({
+  nodeType: "nodes-base.slack",
+  config: {},  // Empty to see all required fields
+  mode: "minimal"
+})
+```
+
+**Returns**:
+```javascript
+{
+  "valid": true,           // Usually true (most nodes have no strict requirements)
+  "missingRequiredFields": []
+}
+```
+
+**When to use**: Planning configuration, seeing basic requirements
+
+### Full Validation (mode="full", DEFAULT)
+
+**Speed**: <100ms
+
+**Use when**: Validating actual configuration before deployment
+
+```javascript
+validate_node({
+  nodeType: "nodes-base.slack",
+  config: {
+    resource: "channel",
+    operation: "create",
+    channel: "general"
+  },
+  profile: "runtime"  // Recommended!
+})
+// mode="full" is the default
+```
+
+---
+
+## Validation Profiles
+
+Choose based on your stage:
+
+**minimal** - Only required fields
+- Fastest
+- Most permissive
+- Use: Quick checks during editing
+
+**runtime** - Values + types (**RECOMMENDED**)
+- Balanced validation
+- Catches real errors
+- Use: Pre-deployment validation
+
+**ai-friendly** - Reduce false positives
+- For AI-generated configs
+- Tolerates minor issues
+- Use: When AI configures nodes
+
+**strict** - Maximum validation
+- Strictest rules
+- May have false positives
+- Use: Production deployment
+
+---
+
+## Validation Response
+
+```javascript
+{
+  "nodeType": "nodes-base.slack",
+  "workflowNodeType": "n8n-nodes-base.slack",
+  "displayName": "Slack",
+  "valid": false,
+  "errors": [
+    {
+      "type": "missing_required",
+      "property": "name",
+      "message": "Channel name is required",
+      "fix": "Provide a channel name (lowercase, no spaces, 1-80 characters)"
+    }
+  ],
+  "warnings": [
+    {
+      "type": "best_practice",
+      "property": "errorHandling",
+      "message": "Slack API can have rate limits",
+      "suggestion": "Add onError: 'continueRegularOutput' with retryOnFail"
+    }
+  ],
+  "suggestions": [],
+  "summary": {
+    "hasErrors": true,
+    "errorCount": 1,
+    "warningCount": 1,
+    "suggestionCount": 0
+  }
+}
+```
+
+### Error Types
+
+- `missing_required` - Must fix
+- `invalid_value` - Must fix
+- `type_mismatch` - Must fix
+- `best_practice` - Should fix (warning)
+- `suggestion` - Optional improvement
+
+---
+
+## validate_workflow (STRUCTURE VALIDATION)
+
+**Speed**: 100-500ms
+
+**Use when**: Checking complete workflow before execution
+
+**Syntax**:
+```javascript
+validate_workflow({
+  workflow: {
+    nodes: [...],        // Array of nodes
+    connections: {...}   // Connections object
+  },
+  options: {
+    validateNodes: true,       // Default: true
+    validateConnections: true, // Default: true
+    validateExpressions: true, // Default: true
+    profile: "runtime"         // For node validation
+  }
+})
+```
+
+**Validates**:
+- Node configurations
+- Connection validity (no broken references)
+- Expression syntax ({{ }} patterns)
+- Workflow structure (triggers, flow)
+- AI connections (8 types)
+
+**Returns**: Comprehensive validation report with errors, warnings, suggestions
+
+### Validate by Workflow ID
+
+```javascript
+// Validate workflow already in n8n
+n8n_validate_workflow({
+  id: "workflow-id",
+  options: {
+    validateNodes: true,
+    validateConnections: true,
+    validateExpressions: true,
+    profile: "runtime"
+  }
+})
+```
+
+---
+
+## Validation Loop Pattern
+
+**Typical cycle**: 23s thinking, 58s fixing
+
+```
+1. Configure node
+   ↓
+2. validate_node (23s thinking about errors)
+   ↓
+3. Fix errors
+   ↓
+4. validate_node again (58s fixing)
+   ↓
+5. Repeat until valid
+```
+
+**Example**:
+```javascript
+// Iteration 1
+let config = {
+  resource: "channel",
+  operation: "create"
+};
+
+const result1 = validate_node({
+  nodeType: "nodes-base.slack",
+  config,
+  profile: "runtime"
+});
+// → Error: Missing "name"
+
+// Iteration 2 (~58s later)
+config.name = "general";
+
+const result2 = validate_node({
+  nodeType: "nodes-base.slack",
+  config,
+  profile: "runtime"
+});
+// → Valid!
+```
+
+---
+
+## Auto-Sanitization System
+
+**When it runs**: On ANY workflow update (create or update_partial)
+
+**What it fixes** (automatically on ALL nodes):
+1. Binary operators (equals, contains, greaterThan) → removes `singleValue`
+2. Unary operators (isEmpty, isNotEmpty, true, false) → adds `singleValue: true`
+3. Invalid operator structures → corrects to proper format
+4. IF v2.2+ nodes → adds complete `conditions.options` metadata
+5. Switch v3.2+ nodes → adds complete `conditions.options` for all rules
+
+**What it CANNOT fix**:
+- Broken connections (references to non-existent nodes)
+- Branch count mismatches (3 Switch rules but only 2 outputs)
+- Paradoxical corrupt states (API returns corrupt, rejects updates)
+
+**Example**:
+```javascript
+// Before auto-sanitization
+{
+  "type": "boolean",
+  "operation": "equals",
+  "singleValue": true  // Binary operators shouldn't have this
+}
+
+// After auto-sanitization (automatic!)
+{
+  "type": "boolean",
+  "operation": "equals"
+  // singleValue removed automatically
+}
+```
+
+**Recovery tools**:
+- `cleanStaleConnections` operation - removes broken connections
+- `n8n_autofix_workflow({id})` - preview/apply fixes
+
+---
+
+## n8n_autofix_workflow (AUTO-FIX TOOL)
+
+**Use when**: Validation errors need automatic fixes
+
+```javascript
+// Preview fixes (default - doesn't apply)
+n8n_autofix_workflow({
+  id: "workflow-id",
+  applyFixes: false,  // Preview mode
+  confidenceThreshold: "medium"  // high, medium, low
+})
+
+// Apply fixes
+n8n_autofix_workflow({
+  id: "workflow-id",
+  applyFixes: true
+})
+```
+
+**Fix Types**:
+- `expression-format` - Fix expression syntax
+- `typeversion-correction` - Correct typeVersion
+- `error-output-config` - Fix error output settings
+- `webhook-missing-path` - Add missing webhook paths
+- `typeversion-upgrade` - Upgrade to latest version
+- `version-migration` - Apply version migrations
+
+---
+
+## Binary vs Unary Operators
+
+**Binary operators** (compare two values):
+- equals, notEquals, contains, notContains
+- greaterThan, lessThan, startsWith, endsWith
+- **Must NOT have** `singleValue: true`
+
+**Unary operators** (check single value):
+- isEmpty, isNotEmpty, true, false
+- **Must have** `singleValue: true`
+
+**Auto-sanitization fixes these automatically!**
+
+---
+
+## Handling Validation Errors
+
+### Process
+
+```
+1. Read error message carefully
+2. Check if it's a known false positive
+3. Fix real errors
+4. Validate again
+5. Iterate until clean
+```
+
+### Common Errors
+
+**"Required field missing"**
+→ Add the field with appropriate value
+
+**"Invalid value"**
+→ Check allowed values in get_node output
+
+**"Type mismatch"**
+→ Convert to correct type (string/number/boolean)
+
+**"Cannot have singleValue"**
+→ Auto-sanitization will fix on next update
+
+**"Missing operator metadata"**
+→ Auto-sanitization will fix on next update
+
+### False Positives
+
+Some validation warnings may be acceptable:
+- Optional best practices
+- Node-specific edge cases
+- Profile-dependent issues
+
+Use **ai-friendly** profile to reduce false positives.
+
+---
+
+## Best Practices
+
+### Do
+
+- Use **runtime** profile for pre-deployment
+- Validate after every configuration change
+- Fix errors immediately (avg 58s)
+- Iterate validation loop
+- Trust auto-sanitization for operator issues
+- Use `mode: "minimal"` for quick checks
+- Use `n8n_autofix_workflow` for bulk fixes
+- Activate workflows via API when ready (`activateWorkflow` operation)
+
+### Don't
+
+- Skip validation before deployment
+- Ignore error messages
+- Use strict profile during development (too many warnings)
+- Assume validation passed (check result)
+- Try to manually fix auto-sanitization issues
+
+---
+
+## Example: Complete Validation Workflow
+
+```javascript
+// Step 1: Get node requirements (quick check)
+validate_node({
+  nodeType: "nodes-base.slack",
+  config: {},
+  mode: "minimal"
+});
+// → Know what's required
+
+// Step 2: Configure node
+const config = {
+  resource: "message",
+  operation: "post",
+  channel: "#general",
+  text: "Hello!"
+};
+
+// Step 3: Validate configuration (full validation)
+const result = validate_node({
+  nodeType: "nodes-base.slack",
+  config,
+  profile: "runtime"
+});
+
+// Step 4: Check result
+if (result.valid) {
+  console.log("Configuration valid!");
+} else {
+  console.log("Errors:", result.errors);
+  // Fix and validate again
+}
+
+// Step 5: Validate in workflow context
+validate_workflow({
+  workflow: {
+    nodes: [{...config as node...}],
+    connections: {...}
+  }
+});
+
+// Step 6: Apply auto-fixes if needed
+n8n_autofix_workflow({
+  id: "workflow-id",
+  applyFixes: true
+});
+```
+
+---
+
+## Summary
+
+**Key Points**:
+1. Use **runtime** profile (balanced validation)
+2. Validation loop: validate → fix (58s) → validate again
+3. Auto-sanitization fixes operator structures automatically
+4. Binary operators ≠ singleValue, Unary operators = singleValue: true
+5. Iterate until validation passes
+6. Use `n8n_autofix_workflow` for automatic fixes
+
+**Tool Selection**:
+- **validate_node({mode: "minimal"})**: Quick required fields check
+- **validate_node({profile: "runtime"})**: Full config validation (**use this!**)
+- **validate_workflow**: Complete workflow check
+- **n8n_validate_workflow({id})**: Validate existing workflow
+- **n8n_autofix_workflow({id})**: Auto-fix common issues
+
+**Related**:
+- [SEARCH_GUIDE.md](SEARCH_GUIDE.md) - Find nodes
+- [WORKFLOW_GUIDE.md](WORKFLOW_GUIDE.md) - Build workflows