HarmonyRuntime Patches for DeepSeek Harness plugins.

A library for patching, replacing and decorating DeepSeek Harness plugins during runtime.

Install Harmony

Write a Patch

Source Patches

Match compiled TypeScript AST nodes with TSQuery, then rewrite exact in-memory ranges with MagicString.

Author a Source Patch

Semantic Patches

Decorate named Host functions with before, after, around, or replace handlers while preserving the call chain.

Author a Semantic Patch

React-aware Patches

Transform compiled jsx and jsxs calls through typed factories, with optional editable previews for Studio.

Explore React integration

Runtime control

Order providers, enable or disable individual Patches, inspect every transformation, and reload transactionally.

Operate Harmony

Patch the runtime, not the installation

Harmony loads Patch providers in a deterministic order. Each Patch receives the previous Patch's output, so independent modifications can compose against the same target. A Patch that cannot be applied is reported and skipped; installed plugin files are never rewritten.

text

installed source (unchanged)
  -> ordered Patch providers
  -> validated in-memory transformations
  -> Host reload or browser HMR

Start with how Harmony fits into the runtime, or go directly to the installation guide. Inspired by Andreas Pardeike and contributors' C# project Harmony.