Use event history to trace when agent state changed

Goal

Identify which event in an invocation wrote state, triggered a tool, or ended the run.

Steps

1. Assign a searchable session ID for the test run and avoid real secrets or personal data. [session]
2. Inspect ordered Event(author=..., actions.state_delta=...) records; correlate runs by event type, author, and invocation ID. [events]
3. Correlate tool calls, tool results, and model events to the same run and mark state mutation points. [events]
4. Create a minimal diagnostic record and remove sensitive payloads before sharing or retention. [events]

How to verify

The timeline traces input through state deltas, tool execution, and final events while preserving event order.

Troubleshooting

If state and logs disagree, inspect event append and delta application in the session service; do not edit persisted history directly.