wiki-ingest: Multi-Agent System Reliability

wiki/entities/Validator.md

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+# Validator
+
+## Definition
+In the Hierarchy multi-agent pattern, the Validator is a checkpoint that checks worker outputs and either accepts them or sends them back for revision. It can be deterministic code (unit tests, JSON schema validation) or an LLM.
+
+## Role in Multi-Agent Hierarchy
+- Validates output of each Worker individually or after aggregation
+- Uses deterministic code or LLM to verify correctness
+- Forces revision if work is substandard
+- Prevents cheating by Workers (caught by verification)
+
+## Key Properties
+- Best used as a different model than Planner for objectivity
+- Two modes: individual Worker validation or aggregated result validation
+- Critical component that makes the dependency graph work — Workers can't skip steps
+
+## Related Concepts
+- [[Multi-Agent Hierarchy]]
+- [[Planner]]
+- [[Worker]]