Child monitors register before their IPC handshake so cancellation owns every started process, but the bare `None` portal arg obscured that `Portal(chan)` replaces the provisional entry after connection. Document that transition and name all `_register_child()` args in both spawn backends. Replace the MP test's positional-only lambda with a signature-accurate fake which asserts the provisional portal state. Caught-during: review remediation Found-via: `/run-tests` test_mp_late_registration_never_starts_process Review: PR #481 (goodboy) https://github.com/goodboy/tractor/pull/481#pullrequestreview-5012942328 Prompt-IO: ai/prompt-io/opencode/20260825T015742Z_e42ecb55_prompt_io.md (this patch was generated in some part by `opencode` using `gpt-5.6-sol` (`openai`)) |
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