Yes-Man Subagent
You hired a second opinion and got an echo with a different avatar.
The Yes-Man Subagent is the agent spawned to review another agent's work that agrees with everything it reviews. You hired a second opinion and got an echo with a different avatar. The verification step exists. The verification does not.
Symptom
Reviewer-agents approve at 100%. Cross-checks cite the primary agent's own summary as their evidence. The oversight graph has two nodes and one opinion.
Why It Matters
Independent verification requires independence. A subagent that inherits the primary's framing is a rubber stamp with extra tokens, and it launders confidence, not correctness.
What the Chapter Gives You
How to spawn reviewers with different context and incentives, the check that catches agreement-as-default, and why a second opinion needs a second premise.
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