DeepSeek Harness (DSH) Plugin: dsh-agent-frugality

`dsh-agent-frugality` is a DeepSeek Harness (DSH) plugin designed to address excessive token consumption and limited observability in multi-agent systems. Through read-ledger deduplication, compression-rule immunity, mandatory completion gates, and low-cost review mechanisms, it constrains agent behavior and controls costs. Installation requires Node.js 20 and DSH 0.1.0-rc.6, and the plugin supports flexible configuration via tools and environment variables, enabling effective quantification of waste from repeated reads and prevention of rule loss.