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fix(tasks): bound task control failures

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Tianyi Cui
2026-07-23 01:56:10 +08:00
parent f8939daf0a
commit 9900550bdc
6 changed files with 111 additions and 6 deletions
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.agents/notes/implemented/architecture/2026-06-20-generic-long-running-tool-runtime.md
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@@ -75,7 +75,7 @@ Stream reads share one task-scoped consuming cursor because the owning model is
The system prompt tells the model to retain task ids, continue independent work instead of busy-polling or duplicating a running task, collect relevant tasks before its final answer, and kill work that no longer matters. Completion injects a logged `context/message` into the exact owner's session; it becomes durable context for the next request but does not wake an idle agent.
The runtime marks a terminal task `reported` when a read or wait delivers it, when a live waiter has claimed delivery at settlement, or when the model explicitly kills it. Reported tasks do not inject redundant completion notices. Listener failures are logged independently, do not stop later listeners, and are not awaited by waiters or teardown. When a snapshot carries `outputLimitBytes`, `dsh-tool-tasks` preserves UTF-8 boundaries and reuses an existing producer truncation marker rather than duplicating it. Reads reserve status suffixes and retain the output tail; completion notices reserve the stable `background task <id>` prefix and `task_output` instruction before truncating variable kind, label, status, or detail, so the minimum PTY cap still identifies the task to collect.
The runtime marks a terminal task `reported` when a read or wait delivers it, when a live waiter has claimed delivery at settlement, or when the model explicitly kills it. Reported tasks do not inject redundant completion notices. Listener failures are logged independently, do not stop later listeners, and are not awaited by waiters or teardown. When a snapshot carries `outputLimitBytes`, `dsh-tool-tasks` preserves UTF-8 boundaries and reuses an existing producer truncation marker rather than duplicating it. Reads reserve status suffixes and retain the output tail; completion notices reserve the stable `background task <id>` prefix and `task_output` instruction before truncating variable kind, label, status, or detail, so the minimum PTY cap still identifies the task to collect. The task surface remembers the producer cap before invoking read, wait, or cancellation hooks, then applies it outside normalized dispatch and downstream post-execute policy so thrown hooks and single-text replacements cannot escape the bound; deliberately structured multi-block policy results retain policy ownership of their shape and size.
## Producer opt-in