---
model: openai/gpt-5.6-sol
service: opencode
session: ses_0799212ebffe42arY96czXn89F
timestamp: 2026-08-12T15:00:27Z
git_ref: c2a6ccef
scope: code
substantive: true
raw_file: 20260812T150027Z_c2a6ccef_prompt_io.raw.md
---

## Prompt

For Tractor PR 490 item three, prevent subscriber closure from waking another
receiver's shared event or stranding peers. Preserve close-safe source-read
ownership handoff, then review, verify and return a complete commit plan.

## Response summary

Introduced receiver-local wait/source cancellation, owner-specific handoff,
and close precedence over shielded source values/errors/EOC. Clarified that
private scope cancellation means explicit close while outer task cancellation
remains `trio.Cancelled` for both source-read and peer-wait scopes, with
deterministic receiver-close regressions.

## Files changed

- `tractor/trionics/_broadcast.py` - receiver-local close and ownership scopes.
- `tests/test_task_broadcasting.py` - peer close and owner handoff regressions.

## Human edits

None - generated output follows the requested third iterative item.