Stop paying for the same tokens twice (opens in new tab)

I ran five reviewer agents over a 16K-token PR. The naive setup cost $1.32. Two architectural changes brought it to $0.49. Here's the bill, and what the experiment surprised me with along the way. Five specialist agents reviewed the same pull request. Security, tests, perf, observability, API design. Each one re-read the full diff. Each one paid full price. The bill landed at $1.32 for a single PR pass on Claude Opus 4.6. One PR. One review pass. Buck thirty-two. If you're running multi-agent...