Orchestration · Software component
Dependency Cycle Validator
Software componentOrchestrationOrchestration & Toolsarc:DependencyCycleValidator
A configuration-time validator that rejects any declared inter-agent dependency that would close a cycle, using depth-first search with a recursion stack so the dependency graph remains acyclic.
Responsibility. Rejects dependency declarations that would create a cycle.
Also known as: Cycle detection, Pre-flight dependency validation
Variant of Deadlock Controller abstract
When to choose. Choose when agent dependencies can be declared at workflow-configuration time; static validation makes runtime deadlock structurally impossible and fails fast, with no scanning cost or detection latency.
Relationships
guards control
alternative to variability
Design guidance
- SHOULD pre-declare agent dependencies and validate them once at configuration time rather than detect deadlock at runtime.
- SHOULD use depth-first search (tracking the current path) rather than breadth-first search for cycle detection.
- SHOULD re-validate the graph whenever agents or dependencies are added, e.g., when splitting a bottleneck agent.
Quantitative guidance
As stated by the sources; verify before use.
- Deadlock failures fell from 35% of failures to 0% after cycle detection (Ch8.2A).
Classification
- Patterns
- Depth-first search cycle detectionStatic dependency analysisFail-fast validation
- Quality attributes
- Reliability (ISO/IEC 25010 | NIST AI RMF: valid and reliable)Maintainability (ISO/IEC 25010)
- Risks mitigated
- Multi-agent deadlock from circular dependenciesUnsafe workflow refactoring
Sources
- Ch8.2A: T. Nguyen, "Error Rates and Reliability," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 8.2A. ISBN: 9798244538229.