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Patrick Buckley
aa4371ea99
Between a mid-stream death and the next begin_attempt there is no live attempt, but the consumer kept the dead attempt's armed _CancelRef: a Stop in that window re-emitted the discarded splitter carry as fresh content behind a duplicate stream_end, and a walk-preamble failure was classified as another armed death, replacing the operator-actionable stream-death error. end_attempt() now pronounces the attempt dead at partial-capture; the consumer gains a single per-attempt initializer (_reset_attempt), a lane-free constructor (one resolve_lane walk per turn), and a saw-chunk classifier fallback so a never-arming adapter's mid-stream death still classifies mid-stream instead of silently double-rendering the same lane. Wire-preparation failures are typed at the seam: model_turn wraps prepare_wire raises in WirePreparationError, both walk arms forward it verbatim (no health record, no fallback walk — a session-data fault would otherwise paint every backend degraded), the fatal formatter gets a dedicated branch, and the re-issue ladder's last-death mask exempts it alongside BackendAuthUnavailableError so an auth outage mid-turn is not misdiagnosed as a network flap. Riding fixes: the tag-scan gate gets its single spelling (lane_scans_inline_reasoning) shared by drain and display; the citations fold's separator+gate become a shared pair in _protocol; _build_main_lane stops passing config_store (dead derivation — the session's own knobs replace both values it feeds); the debug wire dump is ruled per-invocation (the overflow-recovery re-print is the dump that diagnoses the recovery) and pinned; dead delegates _ensure_tool_call_ids and _finalize_provider_blocks deleted; the parity runner adapts to the pre-fold seam signature by inspection and refuses to record a harness-shape TypeError as a baseline; the streaming provider fakes move to tests/_session_helpers (their tree-wide home) and test_cancel's duplicate helper is deleted; committed parity pins restate their rulings in full; architecture.md's circuit-breaker section is replaced by the real passive health-tracker story and the send-flow diagram stops attributing tool-call assembly to the display consumer; stale pre-fold names and ragged comment paragraphs cleaned. New pins are mutation-probed: disabling end_attempt, the saw-chunk fallback, the auth exemption, or the WirePreparationError arm each fails its pin.