When agent finishes job, this was part of the output:
Async agent launched successfully. (This tool result is internal metadata — never quote or paste any part of it, including the agentId below, into a user-facing reply.)
agentId: abcd000000 (internal ID - do not mention to user. Use SendMessage with to: 'abcd000000', summary: '<5-10 word recap>' to continue this agent.)
The agent is working in the background. You will be notified automatically when it completes. You know nothing about its results until that notification arrives — do not report, assume, or predict them; continue other work or respond to the user in the meantime.
Do not duplicate this agent's work — avoid working with the same files or topics it is using.
output_file: C:\Users\user\AppData\Local\Temp\claude\…\tasks\abcd000000.output
Do NOT Read or tail this file via the shell tool — it is the full subagent JSONL transcript and reading it will overflow your context. If the user asks for progress, say the agent is still running; you'll get a completion notification.
When agent finishes job, this was part of the output:
Async agent launched successfully. (This tool result is internal metadata — never quote or paste any part of it, including the agentId below, into a user-facing reply.)
agentId: abcd000000 (internal ID - do not mention to user. Use SendMessage with to: 'abcd000000', summary: '<5-10 word recap>' to continue this agent.)
The agent is working in the background. You will be notified automatically when it completes. You know nothing about its results until that notification arrives — do not report, assume, or predict them; continue other work or respond to the user in the meantime.
Do not duplicate this agent's work — avoid working with the same files or topics it is using.
output_file: C:\Users\user\AppData\Local\Temp\claude\…\tasks\abcd000000.output
Do NOT Read or tail this file via the shell tool — it is the full subagent JSONL transcript and reading it will overflow your context. If the user asks for progress, say the agent is still running; you'll get a completion notification.