8ee9216a076ccbad5ea709bbe7056f4fb5b9de60
Review #002 R4 — a NegotiateRequest parse failure of the open op's schema-validated input died silently (log + return, channel teardown, consumer observed NoExitChunk — indistinguishable from a crashed producer), while the other post-open failure classes (unknown backend, allocate_failed, ownership denial) wrote the 0x00-prefixed error frame. - make_tty_open_handler now accepts the channel's BiStream and writes a malformed_negotiation frame via the shared crate::adapter::send_negotiation_error (now pub(crate)) before returning; the consumer's M1 peek surfaces NegotiationRejected unchanged - the frame type and layout are unchanged (ADR-001 wire-stable contract); no new frame type, no wire change - tests: make_tty_open_handler seam test with a hand-built schema-bypassing input (cwd: 42) + a real-registry end-to-end test via ChannelClient::open_channel (bypasses open_via_channels's local fail-fast parse — R5's path — so it exercises the producer handler) - docs: ADR-009 amended (Parse-failure error frame section); tty-adapter.md malformed_negotiation row covers both paths; session.rs post-open failure lists updated; review #002 R4 resolved Note: the review's "unreachable end-to-end" premise was refined — open_via_channels parses params locally (fail-fast) so a TtySession consumer never hits the producer-side parse failure, but direct ChannelClient callers do; the schema is deliberately partial so a schema-valid value (cwd typed as a number) reaches the handler. Verification: cargo test 95 lib (default) / 138 (--all-features); clippy -D warnings native + wasm clean; fmt clean; doc 0 warnings.
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