Bundled by #83063 into the always-shipped set, but it serves only
multi-agent kanban campaigns — too niche for every install's skills
index (~20 tok/call for all users). Moved to the optional catalog
(installable via /skills search + hub, official source) and renamed so
the trigger is legible at a glance: 'merge-reconciler' read like a
generic git helper; 'agent-merge-conflict-arbiter' says who it is for.
- skills/autonomous-ai-agents/merge-reconciler -> optional-skills/autonomous-ai-agents/agent-merge-conflict-arbiter
- frontmatter name + description updated (description within the 60-char hardline its own contract test enforces)
- contract test moved/renamed, 9/9 green
- kanban docs (en + zh-Hans) repointed; zero merge-reconciler refs remain
4fcbe2d59c