I Asked 3 Claude Code Sub-agents to Review the Same PR. They Disagreed on 41% of the Comments. (opens in new tab)

I thought multi-agent code review was a free upgrade. Three sub-agents looking at the same PR sounded like three pairs of eyes for the cost of one engineer's coffee. Then I ran three Claude Code sub-agents on the same 500-line refactor PR and watched them disagree on 41% of the comments. The merge took an hour I had budgeted for fifteen minutes. Brooks's Law is alive in 2026, and apparently it scales down to agents. Anthropic announced in March that fewer than 1% of their internal code-review...