Agent Node Regression in Dify 1.5.1 — Missing Round Metadata (elapsed_time, started_at, finished_at, usage) Compared to 1.4.3

[PEPravin]

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Dify version

1.5.1

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

In Dify 1.4.3, when an Agent node runs using ReAct strategy, each agent “ROUND” contains rich metadata:

• started_at
• finished_at
• elapsed_time
• total_tokens
• total_price
• currency

Example from 1.4.3:

  "label": "ROUND 1",
  "metadata": {
    "currency": "USD",
    "elapsed_time": 1.75,
    "finished_at": 1447812.0136,
    "started_at": 1447810.2630,
    "total_price": "0.0010276",
    "total_tokens": 2500
  }
}

In Dify 1.5.1, the same Agent node produces only basic metadata (action, thought) and all timing + cost metadata are missing.

Example from 1.5.1:

  "label": "ROUND 1",
  "metadata": {
    "action": "",
    "thought": "{...}"
  }
}

This breaks:

• observability
• latency debugging
• token/cost monitoring
• production monitoring dashboards
• workflow analytics
• comparison between Agent rounds

Affected Versions:
Working: 1.4.3
Broken: 1.5.1

Steps to Reproduce

• Create a workflow with an Agent node using ReAct strategy
• Connect any LLM (OpenAI, Gemini, etc.)
• Run the workflow

check DB:
SELECT execution_metadata FROM workflow_node_executions WHERE node_type = 'agent';
Compare metadata between 1.4.3 and 1.5.1

✔️ Expected Behavior

Each Agent round should include:

• execution start time
• execution end time
• elapsed time
• total tokens used
• price per round
• currency code

❌ Actual Behavior

All of the above metadata are missing
Only text metadata (thought, action) appears

[dosubot]

This regression in Dify 1.5.1 is due to the backend only persisting metadata keys defined in the WorkflowNodeExecutionMetadataKey enum, so detailed per-round fields like elapsed_time, started_at, finished_at, and usage are not exposed as top-level metadata fields—though they are still generated internally and stored inside the agent_log array. The UI and DB queries in 1.5.1 only surface basic fields (action, thought), which is why the detailed metadata appears missing.

This issue was recognized and addressed after 1.5.1. The following pull requests restore and improve agent node metadata exposure: #24355 (Expose agent node usage), #24368 (fix: correct agent node token counting), and #26723 (fix: workflow token usage). Upgrading to a version that includes these PRs will restore the missing metadata and improve observability.

There is no practical workaround for 1.5.1, as manual extraction from agent_log is not suitable for production. If you need help identifying the minimum fixed version or with upgrade steps, let me know!

To reply, just mention @dosu.

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