dsh-msg-edit

Once a message is sent in DeepSeek Harness Web, going back is nearly impossible. An unsatisfying assistant reply or a typo in your own message simply sits there, forcing you to plow ahead. dsh-msg-edit fills that gap: a pencil icon and a loop arrow appear beside every assistant message, letting you edit the reply inline (both body and thinking) or regenerate it from the owning real user message.

On the backend side, four HTTP RPC endpoints handle the work: rewriting a single assistant reply, reading current text for editor prefill, editing a user message (which truncates all downstream nodes and regenerates), and reading text for prefill. The client plugin declaratively injects an action bar into the assistant message slot, surfacing an edit button and a regenerate button. Clicking edit opens an inline editor covering both the thinking trace and the visible body; saving triggers the rewrite endpoint. The entire plugin ships as a single patch file with zero build steps and zero source modifications.

It is aimed at people who run long conversations, iterate on prompts, or need to fix phrasing after the fact. Rather than mutating the event-sourcing log, the plugin appends surface-replace copy events alongside the original entries. Once the official components merge replay support for those copy events, every known compatibility limitation lifts automatically with no changes needed on this plugin's side.