81 lines
3.8 KiB
Markdown
81 lines
3.8 KiB
Markdown
# @deepseek-ai/dsh-tool-tasks
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The model-facing control surface for `ctx.tasks`: three kind-independent tools, completion notices, and one background-work prompt section. Loading the plugin attaches the surface required by `ctx.tasks.start()`.
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## Tools
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- `task_output(task_id, wait?, timeout_ms?)` reads without blocking by default. Stream tasks return only the next delta; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. `wait: true` waits up to the configured cap and leaves a still-running task alive on timeout.
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- `task_list()` returns caller-visible tasks as `<id> [<kind>] <status> — <label>`.
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- `task_kill(task_id, reason?)` requests cancellation immediately and forwards the logged reason. Terminal tasks return a non-consuming snapshot.
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All three use generic ACP cards: `read` for output and list, `execute` for kill.
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## Completion notices
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An unreported completion injects `background task <id> (<kind>: <label>) finished [status: ...]. Read its output with task_output.` into the exact owner's session. Injection is durable context for the next request, not a wake-up. A kill or terminal read/wait marks delivery reported and suppresses the redundant notice; owner-disposal races are contained.
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## Config
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| key | default | meaning |
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|---|---|---|
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| `waitTimeoutMs` | `30000` | wait used when `wait: true` omits `timeout_ms` |
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| `maxWaitTimeoutMs` | `600000` | cap for model-supplied waits |
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A default above the cap fails at load.
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## Model Experience
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### System prompt
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#### What the model sees
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Every request in this plugin's registration scope contains this guidance. Agent-scoped tool filtering may hide the tools without removing the independently registered prompt section.
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##### Background-task guidance
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```markdown
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Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
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```
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#### Token effect
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Small fixed input cost per request while active.
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#### KV Cache effect
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Prefix-stable while the plugin scope and guidance text are unchanged. Activation or disposal may invalidate reuse from this prompt section.
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### Tool schemas
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#### What the model sees
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The generated [`task_output`, `task_list`, and `task_kill` schemas](../../../docs/tool-catalog.md#deepseek-aidsh-tool-tasks) while this surface is visible.
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#### Token effect
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Fixed schema cost on each request where the tools are visible.
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#### KV Cache effect
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Prefix-stable while tool definitions and visibility are unchanged. Registration lifecycle or scoped restrictions may invalidate reuse from the first changed schema token.
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### Results and notices
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#### What the model sees
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Reads return output or `(no new output)` followed by `[status: <status>]` and optional detail. An empty list returns `(no background tasks)`. Kill returns `requested cancellation of task <id>` or the existing terminal status. Unreported owned completion uses the notice above.
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#### Token effect
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Results and notices remain in parent history until compaction. Stream reads do not repeat consumed output.
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#### KV Cache effect
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Append-only; newly visible content follows the reusable request prefix and does not invalidate existing KV-cache entries.
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## Known Limitations and Deferred Work
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- **Completion notices do not wake idle agents** — callers needing an immediate result must use `task_output`.
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- **Stream reads are single-consumer** — independent observers need another runtime API.
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- **Unowned tasks have no session fence** — external surfaces must supply caller policy or avoid them.
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