dsh-undo

When you are deep in a multi-turn DSH conversation and realize you want to go back and rephrase an earlier prompt, you are usually forced to start a brand-new session from scratch. dsh-undo removes that friction: rewind to any previous prompt right inside the current session, edit it in a forked child session, and send it again — all while the original log stays untouched.

Two entry points make the flow feel natural. Hover the session header to reveal an undo button; its dropdown lists every user turn in reverse chronological order, and picking one forks the session at that turn boundary and prefills the composer so you can tweak the wording and resend. A slim ruler along the left edge of the conversation draws one tick per user message: left-click scrolls to that prompt, and right-click confirms and triggers the same undo directly from the ruler. Everything is computed from the live conversation snapshot in the browser — no RPC calls, no build step, no server dependencies.

Built for DSH users who iterate on prompts frequently, explore alternative phrasings or branching directions within the same conversation thread, and value a non-destructive workflow. Because undo is a fork rather than a mutation, you can rewind repeatedly and try multiple variants without polluting the original record. As a practical bonus, resending the identical prompt after an undo preserves the full request prefix, achieving a measured 99.94% cache hit rate and eliminating most redundant token billing.