---
model: openai/gpt-5.6-sol
service: opencode
session: ses_3e4c90d3eafeqHEtRYSIHgHhpA
timestamp: 2026-08-18T19:30:04Z
git_ref: bf06b4f8
scope: code
substantive: true
raw_file: 20260818T193004Z_bf06b4f8_prompt_io.raw.md
---

## Prompt

Release caller-side context state for every remote-task startup failure,
not only local cancellation. Preserve the remote error, avoid unsafe
follow-up sends and prove pre-publication serialization failures leave
a reused portal healthy.

## Response summary

Extend remote-task startup cleanup across send, acknowledgement and
validation errors. Track completed publication, perform only safe
best-effort cancellation and deterministically remove local state.

## Files changed

- `tractor/runtime/_runtime.py` - clean every startup failure path.
- `tests/test_context_stream_semantics.py` - cover authorization and
  serialization failures before context entry.

## Human edits

The human accepted the discovered edge-case fixes but required general
startup cleanup to land separately from cancellation cleanup, transport
integrity and the public API. This boundary preserves that behavioral
distinction and its dedicated commit-message rationale.