pattern-library-manager

Pattern management in Vigil Guard handles detection patterns across 18 heuristic JSON files in heuristics-service, unified_config.json categories, and PII rules. Edit pattern files under services/heuristics-service/patterns/, update weights in unified_config.json, and run tests to validate changes across the 3-branch scoring system.

Regex validation checks prevent ReDoS (Regular Expression Denial of Service) attacks in detection patterns. The Skill applies ReDoS validation across heuristics-service, semantic-service, and LLM guard components to ensure safe pattern configuration without performance degradation.

Test-driven pattern addition is built into the workflow: edit patterns under services/heuristics-service/patterns/, update unified_config.json, then run tests to validate coverage and scoring across all three service components before deployment.

Category weights and PII patterns are managed separately in unified_config.json. The Skill supports versioned config management for both, allowing independent tuning of detection heuristics and PII rule accuracy without affecting other pattern configurations.

Misconfigurations across heuristics-service, semantic-service, and LLM guard components degrade accuracy and scoring consistency. The Skill prevents this through centralized pattern management, regex safety checks, and validation tooling that ensures all 18 pattern files and unified_config.json remain synchronized.

The Skill provides tooling for editing, validation, and deployment workflows built into versioned config management. No external tools are required; pattern edits, regex validation, and deployment follow a test-driven process within the Vigil Guard services stack.