**Game of Cards (GoC)** — agile for the age of agents. GoC turns work into durable, inspectable Markdown cards that humans and AI agents collaborate on. Agents pull cards autonomously, work them under a per-card Definition of Done, and close them via a DoD-gated `finish-card` skill; humans steer by curating the queue and resolving decision gates. Lineage: XP user stories + Kanban pull + Scrum DoD. The plugin ships 14 skills (`kickoff`, `scan-deck`, `create-card`, `finish-card`, `pull-card`, `audit-deck`, `refine-deck`, `standup`, `retrospective`, …) and 3 runtime hooks that surface active cards, route work-initiating prompts, and prompt the agent to consider filing a generalization card after code-mutating turns. Self-contained — skills invoke plain `goc <verb>` and the engine ships with the plugin; no `pipx install` or host-side package step required (the plugin's bundled CLI is on PATH automatically while the plugin is enabled).