dsh-plugin-dev-manager

One of the most frustrating failure modes in plugin development is when the target Plugin's Host code, configuration, or dependencies misbehave, causing the development DSH instance to crash or fail to start and dragging down the stable DSH responsible for writing code. dsh-plugin-dev-manager runs a supervisor as an independent Node.js process, isolating each development instance's fault domain to a single Workspace. Even if the development DSH restarts repeatedly or exits, the stable control plane, Agent sessions, and other development instances remain unaffected and can automatically reconnect via localhost RPC once the stable DSH recovers.

Core capabilities span the full develop-validate-promote loop: each Workspace gets its own DSH_HOME, port, and Web profile; multiple local Plugins, pinned dependencies, and team Presets can be composed for joint debugging; controlled start, stop, restart, and health checks are first-class operations; clean validation runs in a completely fresh isolated environment, and passing generates a SHA-256-verified promotion tarball; and a queued-update mechanism installs and restarts the stable Host only after it reaches a full idle window, protected by applying journals, per-package checkpoints, and bounded backoff. Agent tools and the Web settings panel share the same supervisor and registry, so every operation path is consistent.

Best suited for individual engineers and small teams building or maintaining Plugins in the DeepSeek Harness ecosystem. If you need to debug multi-Plugin compositions, want development failures to stay isolated from other work, or prefer an integrated flow from local validation to version promotion, this plugin provides a stable, isolated development control plane with well-defined security boundaries.