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start({ kind, label, owner, run }) preflights everything that can fail
(the attachSurface fence, validation, the owner-cleanup attach) BEFORE
invoking the producer's run() starter, then commits atomically —
'work started but never got a collectable id' is now structurally
impossible instead of a producer try/catch rollback obligation (the
P1 review fix, rebuilt on #185's declare/execute split). Producers
lose their catch-wraps; the leak tests now pin the stronger property
that a failed preflight never spawns anything. TaskRegistration splits
into TaskStart (identity + run) and TaskHooks (cancel/done/readOutput);
docs, type-equiv manifest, catalogs, and both RFCs move with it.
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tasks/ — background task capability family
The shared background-task runtime: ONE home for task ids, owner isolation, polling, cancellation, wait, and completion notification, so bash, subagents, and every future long-running tool expose the same model-facing habit instead of cloning a private task protocol each. Rationale and the full design: the background-task-runtime RFC.
| Package | ctx key | Role |
|---|---|---|
tasks (@deepseek-ai/dsh-tasks) |
ctx.tasks |
The registry service: branded <kind>-N ids, owner-fenced read/kill/wait/list, settlement bookkeeping, the awaited owner-cleanup path, and the attachSurface misconfiguration fence |
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 split is the state/surface boundary: the registry holds task state (an HMR reload of any tool plugin never orphans or kills a running task), while the tool surface is stateless presentation. Producers (dsh-tool-bash, dsh-tool-subagent) hand their work to ctx.tasks.start (preflight, then the producer's starter, then an atomic commit) and keep their own execution concerns; whether a producer exposes run_in_background is that producer's own enableRunInBackground config, never rewritten by this family.