Greptile Overview

Summary

Added comprehensive guardrails block with four validation types: JSON, Regex, Hallucination Check (RAG + LLM scoring), and PII Detection (Microsoft Presidio). Integrated with workflow blocks system, added new grouped checkbox UI component for PII type selection, updated Docker setup for Python dependencies, and included full documentation.

Key Changes:

• New guardrails block configuration with conditional UI based on validation type
• API route at /api/guardrails/validate with input validation and error handling
• TypeScript validators for JSON, regex, and hallucination detection
• Python-based PII detection using Microsoft Presidio with TypeScript wrapper
• New grouped-checkbox-list sub-block component for multi-select PII types
• Docker configuration updated to install Python 3, pip, and run setup script
• Comprehensive documentation with examples and best practices

Critical Issue:

• validate_pii.ts:82 - Promise constructor missing reject parameter, causing runtime errors on lines 100 and 178

Confidence Score: 2/5

• This PR has a critical bug that will cause runtime failures in PII validation
• Score reflects a critical logical error in validate_pii.ts where the Promise constructor is missing the reject parameter (line 82), but reject is called on lines 100 and 178. This will cause immediate runtime errors when PII validation times out or encounters spawn errors. The rest of the implementation is well-structured with good error handling, comprehensive validation logic, and proper documentation.
• Critical attention required for apps/sim/lib/guardrails/validate_pii.ts - must fix Promise constructor before merge

Important Files Changed

File Analysis

Sequence Diagram

sequenceDiagram
    participant User
    participant Block as Guardrails Block
    participant Tool as guardrails_validate Tool
    participant API as /api/guardrails/validate
    participant Validator as Validation Logic
    participant KB as Knowledge Base API
    participant LLM as LLM Provider
    participant Python as Python Script (PII)

    User->>Block: Configure validation type & parameters
    User->>Block: Wire input from previous block
    
    Block->>Tool: Execute with input & config
    Tool->>API: POST /api/guardrails/validate
    
    alt JSON Validation
        API->>Validator: validateJson(input)
        Validator->>API: {passed, error?}
    else Regex Validation
        API->>Validator: validateRegex(input, pattern)
        Validator->>API: {passed, error?}
    else Hallucination Check
        API->>Validator: validateHallucination(input, config)
        Validator->>KB: Query knowledge base (RAG)
        KB->>Validator: Return relevant chunks
        Validator->>LLM: Score confidence (0-10)
        LLM->>Validator: {score, reasoning}
        Validator->>API: {passed, score, reasoning}
    else PII Detection
        API->>Validator: validatePII(input, config)
        Validator->>Python: Spawn validate_pii.py
        Python->>Python: Presidio analyze & anonymize
        Python->>Validator: {passed, detectedEntities, maskedText?}
        Validator->>API: {passed, detectedEntities, maskedText?}
    end
    
    API->>Tool: {success, output}
    Tool->>Block: Return validation result
    Block->>User: Display result (passed/failed)

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