dsh-payback: Payback Period Estimation Plugin for Small Stores

dsh-payback is a payback period estimation plugin for the DeepSeek Harness (DSH) platform, designed to address the lack of flexibility in hard-coded financial calculation logic within workflows. It supports parameterized input and directly returns results for estimating the payback period of small business operations. Maintained by uckkk and implemented in pure Node.js, it has no network dependencies and can run under the current process permissions. Once installed, it can be invoked in DSH sessions to provide standardized tooling support for business logic calculations.