dsh-harmony

dsh-harmony addresses a practical problem in the DeepSeek Harness plugin ecosystem: when one plugin needs to change the internal behavior of another plugin that does not expose the right extension point, developers often have to maintain a fork, edit dependencies manually, or reapply patches after every upgrade. Harmony provides a controlled runtime patch coordination layer that loads patches before the target runs and transforms compiled code in memory, leaving installed files unchanged.

Its core capabilities include Source Patches that locate TypeScript AST nodes and rewrite source ranges, along with patch ordering, enablement controls, status inspection, composite patches, and visible failure handling. For browser plugins, it can keep provider-owned style tags ordered according to patch order, while React-aware patching through dsh-harmony-react can modify compiled JSX calls or shared component definitions.

dsh-harmony is best suited for DSH plugin developers and platform maintainers who need to customize, integrate, or repair behavior inside other plugins without taking on a long-lived fork. It does not turn compiled internals into a stable public API, but it makes those dependencies explicit, ordered, inspectable, and reversible, which is useful for teams that want safer runtime extensions with less maintenance overhead.