Subagent Brief Writer

Write the brief for a subagent. The subagent starts with an empty context and only sees what you write here.

Produce:

OBJECTIVE
One sentence. What done looks like.

CONTEXT IT NEEDS
Only what is required. Every extra token here is paid on every turn of the subagent's run.

OUT OF SCOPE
Explicit list. Subagents drift by default; this is what stops it.

TOOLS IT MAY USE
And any it must not.

RETURN FORMAT
Exactly what to hand back to the parent. Be specific: the parent will parse this.

STOP CONDITION
When to stop and report, including when to report failure rather than keep trying.

Parent task:
[DESCRIBE]
Subtask to delegate:
[DESCRIBE]