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Moira Documentation

Validation Loop Pattern

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Purpose

Section titled “Purpose”

Ensure quality by verifying results and retrying if they don’t meet criteria. Prevents low-quality outputs from proceeding.

Structure

Section titled “Structure”
[action] → [check] → success → [next]
              ↓
           failure → [fix] → [increment-iteration] → [action]

Implementation

Section titled “Implementation”

Action Node

Section titled “Action Node”
{
  "type": "agent-directive",
  "id": "do-work",
  "directive": "Complete the task. Iteration: {{current_iteration}}",
  "completionCondition": "Task completed with quality standards met",
  "inputSchema": {
    "type": "object",
    "properties": {
      "result": { "type": "string" },
      "quality_check_passed": { "type": "string", "enum": ["yes", "no"] }
    },
    "required": ["result", "quality_check_passed"]
  },
  "connections": { "success": "check-quality" }
}

Check Node

Section titled “Check Node”
{
  "type": "condition",
  "id": "check-quality",
  "condition": {
    "operator": "eq",
    "left": { "contextPath": "quality_check_passed" },
    "right": "yes"
  },
  "connections": {
    "true": "next-step",
    "false": "fix-issues"
  }
}

Fix Node

Section titled “Fix Node”
{
  "type": "agent-directive",
  "id": "fix-issues",
  "directive": "Fix issues found in iteration {{current_iteration}}. Previous result: {{result}}",
  "connections": { "success": "increment-iteration" }
}

Iteration Counter

Section titled “Iteration Counter”

Using expression node:

{
  "type": "expression",
  "id": "increment-iteration",
  "expressions": ["current_iteration = current_iteration + 1"],
  "connections": { "default": "do-work" }
}

With Max Iterations

Section titled “With Max Iterations”

Add check before retry:

{
  "type": "condition",
  "id": "check-max-iterations",
  "condition": {
    "operator": "lt",
    "left": { "contextPath": "current_iteration" },
    "right": 5
  },
  "connections": {
    "true": "do-work",
    "false": "escalate-to-user"
  }
}

Numeric Quality Check

Section titled “Numeric Quality Check”

For measurable quality:

{
  "inputSchema": {
    "properties": {
      "quality_score": { "type": "number", "minimum": 0, "maximum": 10 }
    },
    "required": ["quality_score"]
  }
}
{
  "condition": {
    "operator": "gte",
    "left": { "contextPath": "quality_score" },
    "right": 8
  }
}

Real Example

Section titled “Real Example”

From development-flow.json:

{
  "id": "verify-step-implementation",
  "directive": "Verify step {{current_step_name}} implementation:\n- Expected: {{expected_outcome}}\n- Check actual matches expected",
  "inputSchema": {
    "properties": {
      "step_verified": { "type": "string", "enum": ["yes", "no"] },
      "verification_evidence": { "type": "string" }
    },
    "required": ["step_verified", "verification_evidence"]
  }
}
Section titled “Related Patterns”