Use info-level logging for missing agent output files

[Copilot]

When agents fail before producing safe-outputs (e.g., due to API errors like missing finish_reason), the conclusion job logs ##[error]Error reading agent output file even though the missing file is expected. This obscures the actual failure cause.

Changes

• load_agent_output.cjs: Use core.info() instead of core.error() when file doesn't exist

  • Missing output file is normal when agents fail early
  • Error details still returned for diagnostic purposes

• load_agent_output.test.cjs: Update test expectations to verify core.info is called

Example

Before (error level):

core.error("Error reading agent output file: ENOENT: no such file or directory");

After (info level):

// Use info instead of error for missing files - this is a normal scenario
// when the agent fails before producing any safe-outputs
core.info("Error reading agent output file: ENOENT: no such file or directory");

The actual agent failure (API error) remains visible in agent job logs. Downstream handlers already gracefully handle missing files.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[agentics] CI Cleaner failed</issue_title>
<issue_description>## Workflow Failure

Status: Failed
Workflow: CI Cleaner
Run URL: https://github.com/githubnext/gh-aw/actions/runs/21041382054

Root Cause

The agentic workflow has encountered a failure. This indicates a configuration error, runtime issue, or missing dependencies that must be resolved.

Action Required

Agent Assignment: This issue should be debugged using the agentic-workflows agent.

Instructions for Agent:

1. Analyze the workflow run logs at: https://github.com/githubnext/gh-aw/actions/runs/21041382054
2. Identify the specific failure point and error messages
3. Determine the root cause (configuration, missing tools, permissions, etc.)
4. Propose specific fixes with code changes or configuration updates
5. Validate the fix resolves the issue

Agent Invocation:

/agent agentic-workflows

When prompted, instruct the agent to debug this workflow failure.

Expected Outcome

• Root cause identified and documented
• Specific fix provided (code changes, configuration updates, or dependency additions)
• Verification that the fix resolves the failure

Generated from CI Cleaner

Comments on the Issue (you are @copilot in this section)

• Fixes [agentics] CI Cleaner failed #10119

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