<objective Safe git revert — roll back GSD phase or plan commits using the phase manifest, with dependency checks and a confirmation gate before execution. Three modes: - --last N : Show recent GSD commits for interactive selection - --phase NN : Revert all commits for a phase (manifest + git log fallback) - --plan NN-MM : Revert all commits for a specific plan </objective <execution context @${CLAUDE PLUGIN ROOT}/workflows/undo.md @${CLAUDE PLUGIN ROOT}/references/ui-brand.md @${CLAUDE PLUGIN ROOT}/references/gate-prompts.md </execution context <context $ARGUMENTS </context <process Execute…