Schema checks do not exercise ctx discovery, directional decoding,
stream setup, request correlation or endpoint-finally cleanup.
Boot an isolated child actor around `remote_gap_overlays()` and
drive it through `AnnotClient`. Cancel one published request, leave
its reply queued and prove the next request discards that stale
msg.
Also,
- verify generated request IDs and remote-owner cleanup;
- document automated coverage and broker-backed manual boundaries.
Prompt-IO: ai/prompt-io/opencode/20260817T222036Z_f65df6a1_prompt_io.md
(this patch was generated in some part by `opencode` using `gpt-5.6-sol` (`openai`))