The shared home for background-task ids, owner isolation, reads, cancellation, waiting, and completion notices. Bash, subagents, and future long-running tools use one model-facing protocol. See the background-task runtime Agent Note and the task-registry seam Agent Note.

Package	ctx key	Role
`tasks` (`@deepseek-ai/dsh-tasks`)	`ctx.tasks`	The registry seam: branded `<kind>-N` ids, the owner-fenced read/kill/wait/list contract, snapshot vocabulary, the `attachSurface` misconfiguration fence, and the snapshot invariant companion
`tasks-local` (`@deepseek-ai/dsh-tasks-local`)	—	The process-local registry implementation: in-memory records, first-wins settlement bookkeeping, and the awaited owner-cleanup and teardown paths
`tool-tasks` (`@deepseek-ai/dsh-tool-tasks`)	—	The model-facing control surface: `task_output`, `task_list`, `task_kill`, the completion-notice injection, and the background-habit prompt section

The registry owns state across producer or surface reloads; the tool package owns presentation. Producers register execution hooks through ctx.tasks.start and own whether their config exposes run_in_background.