Context Optimizer

It covers the basics (run /compact at 70% context usage, delegate heavy output to subagents) and the less obvious stuff (each MCP adds overhead to every request, keep it under 10 total). The token efficiency section is especially good: no sycophantic openers, code first, and switching response styles based on whether you're coding versus running agent pipelines. The 40-60% output savings from cutting fluff alone makes it worth reading. If you've ever hit the "dumb zone" at 90% context or burned through budget faster than expected, the quick diagnosis table and task profiles will save you real money.