Use this skill whenever the user (an arcforge contributor) says they want to bump arcforge's version, cut a release, "ship vX.Y.Z", "準備發版", "ready to release", or any equivalent intent on the arcforge repo itself — even if they don't use the word "release".…
Execute a task list with one fresh subagent per task plus a single task-reviewer each. Use when tasks need isolated contexts to avoid cross-task pollution; for in-session human-checkpoint execution use arc-executing-tasks.
Read-only advisory audit of an SDD spec family — design, spec, dag, and decision anchors.
Explore and shape a design before implementation. Use when intent is vague, a new feature needs design, or an existing spec needs another iteration — the front door to the SDD pipeline that writes design.md.
Guide manual context compaction to workflow phase boundaries. Use when deciding whether to compact now — compact at clean seams between phases rather than mid-task; the compact-suggester hook may route here as context grows.
Coordinate multi-epic worktrees and cross-epic DAG state. Use when specs/<id>/dag.yaml exists and epics run in parallel worktrees needing sync and merge orchestration; to build a single epic's features use arc-implementing.
Investigate root cause systematically before proposing any fix. Use when hitting a bug, test failure, or unexpected behavior — reproduce, isolate, and confirm the cause with evidence rather than guessing at patches.
Create an Excalidraw diagram or visual — architecture, flowchart, mind map — including casual 'draw this' / 'show me visually'. Also use when arc-maintaining-obsidian delegates Synthesis visuals beyond embedded Mermaid.