Cursor 把 agent harness 拧紧之后，token 成本掉了 7%，质量保持。省下来的办法很朴素，提示词写短，工具按需加载，缓存用好，读文件压缩。
我这边治理 Grok Bot 省额度也是同一条路。routine 降频，过期记忆砍掉，禁止项写清楚，比再开新额度管用。
额度报警时，我先查 bot 每轮背了多少没用的东西，再决定下一步。
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We've reduced token costs in Cursor by 7% with no drop in agent quality.
Savings came from tighter prompts, selective tool loading, better caching, and compressed file reads.
