Module runtime 

Harness runtime facade.

AgentHarness is the single composed runtime that every level of the recursion runs inside: a sub-agent, a subgraph node, a REPL session, or a model-authored blueprint all execute on the same harness — the same model and tool registries, middleware stack, and RunPolicy. That shared, re-entrant runtime is what makes “agents calling agents” and self-authored workflows recurse on one consistent set of capabilities rather than spinning up disjoint engines.

Owns the high-level AgentHarness builder and the RunPolicy bundle that wires registries, middleware, and run policy into a single ergonomic entry point. The agent loop driven by this facade lives in the sibling crate::harness::agent_loop module.

Layout

• [types] holds the public type definitions (RunPolicy and AgentHarness).
• This file holds the builder, registration, and accessor methods.
• test.rs holds focused tests for construction and registration.

Structs

AgentHarness

High-level facade that composes model selection, tool execution, middleware, and run policy behind one builder and runs the default agent loop.

RunPolicy

Declarative, run-scoped policy shared by every invocation of an AgentHarness.