What problem does it solve? Managing project roadmap phases manually in ROADMAP.md is error-prone, especially when inserting urgent work between phases, renumbering after removals, or editing phase fields consistently. ## Core Features & Use Cases - Add Phase: Append a new integer phase to the end of the current milestone with a single command. - Insert Phase: Insert urgent work as a decimal phase (e.g., 72.1) between existing phases using the --insert flag. - Remove & Edit Phases: Remove a future phase with automatic renumbering via --remove, or edit any field of an existing phase in place via --edit. - Use Case: While executing a milestone, an urgent bug fix arrives. Run the skill with --insert to slot it in as phase 72.1 without disturbing the rest of the roadmap. ## Quick Start Ask the assistant to run gsd-phase with a phase description to add a new phase, or with --insert, --remove, or --edit followed by the phase number to modify the roadmap.