What problem does it solve? It turns an approved plan into finished code without ambiguity: it locates the correct plan file, records the operator's go-ahead, implements the work with disciplined commits, runs mandatory quality passes, and fills in the pull request. ## Core Features & Use Cases - Plan lifecycle management: Flips plan files from draft to in-progress to completed (or paused) via git renames that encode state, quoting the operator's literal go-ahead in the commit message. - Three entry modes: Bare invocation on the current branch, attaching to an existing branch or PR by target token, or planless execution from a prose task description. - Handoff canary: Detects mispasted cross-session handoff blocks and stops to ask rather than implementing a branch name as if it were a task. - Use Case: After a planning session produces docs/plans/add-dark-mode.draft.do-not-implement.md, invoke /go in a fresh session with the branch target to attach, implement the plan, run the polish passes, and open the PR. ## Quick Start Type /go followed by the branch name from your planning session's handoff block to attach to that branch and implement the approved plan.