The Message Execution Timeline and Chat Emulator inside Agent Studio give you full visibility into every step of an AI conversation — so you can spot issues fast, troubleshoot bottlenecks, and ship agents with confidence.
What the Message Execution Timeline & Chat Emulator Do
The Message Execution Timeline and Chat Emulator are built right into Agent Studio to help you test and troubleshoot AI conversations with complete visibility. The Timeline captures every event, tool call, and decision your agent makes alongside model performance details, while the Chat Emulator lets you simulate live conversations, reset sessions, and jump straight to the node responsible for any behavior — all without leaving the builder.
Why Testing and Debugging Matters
Realistic testing environment: validate conversations in a chat interface that mirrors what your end users will actually experience, so QA stays accurate.
Message Execution Timeline
The Timeline sits beside the Chat Emulator and updates in real time as your agent runs. Event cards show the node name, model, input/output tokens, and execution time. Colored latency badges (red for slow, green for fast) make bottlenecks easy to spot, and you can hover any card to see raw JSON inputs/outputs for deeper inspection.
Transition Node Button
Each step in the Execution Timeline includes a purple Transition label. Click it and Agent Studio jumps you straight to the exact node the conversation moved into during that step — highlighting it on the canvas so you can review or update its logic without hunting through the flow. It's a fast way to connect execution logs to the visual builder.
Performance Metrics Panel
Beneath each message, the metrics footer shows:
- Model + version (e.g., gpt-4-turbo)
- Input / output token counts
- Temperature, max tokens, top-p, frequency / presence penalties
- Total cost estimate (when billing is enabled)
This view makes it easy to evaluate both performance and efficiency while testing.
Chat Emulator
The Chat Emulator is a simulated chat surface where you can safely test AI conversations. It's a clean, streamlined environment that mirrors real-world deployment.
- Mobile-responsive chat window with avatar support
- Reset button to clear context between runs
- Side-by-side layout with the Timeline so you can review both at once
Step-by-Step: Testing and Debugging in Agent Studio
This walkthrough shows how to use the Timeline and Chat Emulator together to inspect execution, surface issues, and tune performance before publishing.
Step 1 — Open the Test Environment
Head to AI Agents → Agent Studio and open the agent you want to test. Click the Test tab in the top-right corner to bring up the Chat Emulator and execution view.
Step 2 — Start a Test Session
Click Start to launch the Chat Emulator. The Message Execution Timeline opens automatically alongside the chat window. Send a test message in the emulator (or trigger the agent via API) — as the agent processes it, every node transition, tool call, and model step is logged in real time in the Timeline.
Step 3 — Review the Execution Logs
Walk through the event cards in the Timeline to see how the agent handled the conversation. Watch for node names, tool activity, token usage, execution time, and any latency badges flagging slower steps.
Step 4 — Inspect Performance Metrics
Click into individual log entries to pull up detailed metrics — model version, input/output tokens, temperature, and cost estimates (when enabled). Use these signals to gauge efficiency and tighten up prompts or tool configs.
Step 5 — Jump to the Source Node
Click any log card to highlight the matching node in the builder. From there you can adjust logic, prompts, or variables without manually scanning the canvas.
Step 6 — Reset and Retest
Hit the Reset button in the Chat Emulator to wipe the conversation and execution logs. Re-run the conversation to confirm your changes actually fixed the issue.
Step 7 — Publish with Confidence
Once testing shows the conversation behaving the way you want and performance is dialed in, push your agent to Staging or Production like normal.
Frequently Asked Questions
Q: Is the Timeline available for Voice AI agents?
Yes. When you open the Test tab on a Voice AI agent, the same log view appears after the test call wraps up.
Q: Does the Timeline add token usage or extra cost?
No — the Timeline just records metadata that's already returned with each request, so there's no impact on cost.
Q: Can I export the execution log?
Yes. Click the download icon in the upper-right of the Timeline to save a JSON file of the full execution.
Q: Why don't I see the Go to Node button?
That button only shows up after the agent has been saved at least once. Make sure you're not viewing an unsaved Draft.
Q: Will resetting the Chat Emulator clear the Timeline too?
Yes. Reset wipes both the chat context and the related execution logs so you start fresh.
Q: Is this feature gated by any specific plan?
The Timeline and Chat Emulator are included with Unlimited AI Employee — the same plan that unlocks Agent Studio.
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