Solon AI v4.0.3 Introduces ReActTrace for Full Agent Run Observability

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Solon AI has released ReActTrace in version 4.0.3, a runtime record designed to make ReAct agent runs fully observable beyond just their final output. The feature captures step counts, tool call counts, message history, execution plans, token usage, and pending states within a single trace object. Developers can access structured plan progress and formatted histories, giving audit pipelines and UIs a stable data source without parsing raw model text. ReActTrace also supports streaming, emitting typed chunks for planning, reasoning, tool actions, and observations so interfaces can display live agent status. A pending state mechanism allows workflows to pause before sensitive actions, letting the API layer distinguish between a completed run and one awaiting approval.

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