{
  "summary": "The 74.273 s Windows red is arm 5, not first-seat presentation: the new-session row remained pending after the 45 s observation window. The preserved log identifies the production 10 s eligibility-expiry branch, before translation delivery, while first-seat native delivery and the intentional miss both passed. Quiet-box clearance is the stronger prediction, but this could expose a load-sensitive product race rather than a harmless test timeout.",
  "files": [
    {
      "path": ".worktrees/asm-304-v3/crates/spt/tests/er_briefing_presented_e2e.rs:303-806",
      "description": "Readiness, ceremony, teardown helpers and all sequential acceptance arms; actual failure at :782."
    },
    {
      "path": ".spt/preserved/304-handoff/consumer-windows/phase-b.log:143-497",
      "description": "Named failure: successful initial delivery, intentional miss at 11.4825991 s, new session pending, eligibility-expiry diagnostic and :782 panic."
    },
    {
      "path": ".worktrees/asm-304-v3/crates/spt-daemon/src/broker.rs:2224-2289",
      "description": "Detached native presentation: 10 s / 200 ms eligibility poll; distinct missing-record, eligibility-expired and translation-failed branches."
    },
    {
      "path": ".worktrees/asm-304-v3/crates/spt-daemon/src/inject.rs:37-110,148-226",
      "description": "Eligibility and native spool claim/inject/release; eligibility precedes changed physical input writer."
    },
    {
      "path": ".worktrees/asm-304-v3/adapters/mock/src/main.rs:195-237",
      "description": "Dummy binds then emits heartbeat forever; hold-unbound skips bind; neither consumes input or reports USER_INPUT."
    },
    {
      "path": "docs/INFRA-REGISTER.md:3999-4058",
      "description": "IR-76 shared Windows builder/runner contention; IR-77 readiness attribution limitations."
    },
    {
      "path": "docs/FLAKE-LEDGER.md:38-54",
      "description": "Recorded daemon-readiness, Windows load, and serialized-Phase-B sample/budget precedents."
    }
  ],
  "architecture": "rc takes an engine-room seat through the real broker/brain and real PTY mock harness; seat settlement spools/supersedes the briefing and starts a detached eligibility poll. Eligible native delivery claims the spool row and offers it through broker translation and InputRecord's physical writer. This fixture never sends USER_INPUT or an idle edge. Arm 5 restarts the daemon and changes hold-unbound to dummy in the same home.",
  "report": "SOURCE PREFIX: candidate-relative paths below mean .worktrees/asm-304-v3/. No commands, builds, tests, edits or indexing were performed; only source/history and the named preserved failure were read.\n\nEXACT WINDOWS FAILURE\n• .spt/preserved/304-handoff/consumer-windows/phase-b.log:143 reports FAIL 74.273 s; :495-497 names er_briefing_presented_e2e.rs:782, clause-4 new-session delivery, row id=2 delivered=false with every taker field None. This is not a nextest timeout, not the 30 s brain-ready precondition, and not the arm-1 first-actionable-turn assertion despite the cell's name.\n• :158-161: initial row id=1 delivered=true/native-inject, pending=0, controllable=true, idle=false; never-seated rows empty. :289-291: intentional miss observed after 11.4825991 s, rc4 alive, ceremony successful, repoint Ok; arm-5 new_session_row=None, pending=1, controllable=true, idle=false. All assertions before :782 therefore passed, including old-row removal and loud supersession (:757-781).\n• :477 and :488 show arm-5 ENGINE_ROOM_BRIEFING_SWEPT followed by ENGINE_ROOM_BRIEFING_UNPRESENTED with “perch did not become a deliverable inject target within the bring-up window”. This maps exactly to broker.rs:2273-2280, which returns BEFORE drain_spool_native, not the translation-failure branch at :2282-2289. The re-offer panel includes earlier-generation sink history too; the relevant new broker starts at log :423, avoiding misattribution of the intentional arm-4 line at :419.\n• Interesting observed ordering, NOT diagnosis: new-session PTY created at 17 ms (:450), log_ready/drain armed ~1072 ms (:459-461), CONTROL_REAP_NO_SESSION + LIVENESS_RECONCILE_OFFLINE (:463-464), then translation_ready/session row inserted at 1154 ms (:465-466), later SPAWN_DEDUP and WAKE_RESUME (:485-487). The log does not sample every eligibility conjunct during the ten-second window. A final controllable=true does not establish ready-file presence, liveness, no relay, or their simultaneity during that window.\n\nREAL BOUNDS / PRESENTATION CLAIM\n• Test :323-351 waits on JSON brain.ready PID for 30 s (100 ms polling, final PID read); does not itself test IPC readiness. Ceremony :372-384 has output_bounded 30 s. Teardown :354-369 runs daemon stop with output_bounded 20 s then PID/process kills. common/mod.rs:195-244 starts its process-status deadline after spawn/readers, polls 10 ms, kills on expiry then joins capture readers; this is not one encompassing hard wall bound on every operation.\n• Initial rc has piped stdin never written (:418-427); arm 1 polls delivered audit rows for 30 s / 150 ms (:436-447). Arm 2 is a fixed 3 s never-seated wait (:473-478). Intentional miss waits for actual diagnostic existence 45 s / 200 ms (:303-318, :588-596); asserts at least 9 s elapsed (:721-726). Arm 5 kills/restarts daemon, deletes old brain.ready, re-registers same adapter dummy, then waits 45 s / 150 ms for a DIFFERENT delivered row (:631-679). Whole-cell 74 s cannot identify which bound expired without the log.\n• Product broker.rs:2224-2246 creates a detached presentation thread, polls ~10 s / 200 ms. inject.rs:37-49 requires is_online, no relay address and controllable=true. is_online itself needs ready marker + is_perch_alive (spt-msg/src/deliver.rs:86-92). On success, inject.rs:155-197 claims audited native-inject row, offers via Brain::inject_endpoint, releases unsuccessful claims. No idle edge required.\n• Acceptance observes spool delivery/taker audit, not text rendered/read by the harness. Dummy fixture binds (adapters/mock/src/main.rs:199-225), then only prints heartbeat forever (:230-237). It never reads the briefing or reports USER_INPUT. Hazard 7.22 (docs/KNOWN-HAZARDS.md:627-633) explicitly distinguishes successful enqueue acknowledgement from physical completion during a translation fault transient. Do not upgrade this cell into an end-user rendering proof.\n\nBATCH OVERLAP / NON-OVERLAP\n• Physical writer / deliverybytes IS traversed by successful native delivery in arm 1: broker.rs:4213-4271 constructs InputWriter/DeliveryBytes; :4343-4348 dispatches records; :4841 settle probes, :4919-4922 delivery text and :4988-4991 keys use InputRecord. deliverybytes.rs:212-234 wraps physical write_input with in-flight/evidence recording. However the FAILED arm-5 native offer stops at the eligibility branch, before that writer; module overlap is not evidence this writer caused this failure. Writer construction/translation setup still occurs during bring-up.\n• rc InputPaths/input_path_worker: only the InputPaths record branch activates worker (rc.rs:3422-3449, worker :3086 onward). Broker produces that request through dispatch_user_input_report (broker.rs:9020-9068). Test never writes rc input; dummy/hold-unbound never reports user content. Thus new path-handling worker not exercised by this fixture's intended flow.\n• nowsignal report_user_input/API USER_INPUT gate not exercised: api/mod.rs:657-658 requires now-signal user content; :778-786 requires state payload classified USER_INPUT. Dummy is the early-return heartbeat mode, NOT the default fixture arm that calls state idle (:239 onward). No candidate USER_INPUT receipt therefore follows the briefing bytes.\n• PRESENCE_PROBE_CEILING is CLI UNLISTED-row probe batching (cli.rs:7002-7033), not this named-id rc attach/native-delivery eligibility predicate. No endpoint-list/picker invocation in this cell.\n• #49/#267 logs: controller detach/clear is genuinely reached during attach/reap, but new CONTROLLER_SLOT_CLOSED emission is gated by diag_trace_enabled (broker.rs:2752-2776; brain.rs:359-362). Trial not-drained logging is brainproc.rs:874-905 and belongs to a ready-generation promotion trial; this cell does cold starts/restart, not candidate promotion. Do not label all brainproc code exercised merely because a brain is spawned.\n• xtask seed scrub is not called by the test body: it invokes the spt binary directly with inherited environment except three agent markers explicitly removed for ceremony (:372-383). Runner-side seed/environment hygiene can affect launched tests, but is not the cell's runtime path. No claim made to have inspected that scrub implementation.\n\nHISTORY / LIMITATIONS / FALSIFIABLE PREDICTION\n• IR-76, docs/INFRA-REGISTER.md:3999-4039, records local workspace nextest fully containing golden Windows Phase A and saturating cores; SPT-only job census misses cargo/nextest/rustc load. Serialized Phase B is not a host-wide quiet lock. FLAKE-LEDGER.md:52 records a same-sha Windows serialized-Phase-B convergence budget red after two passes; :53 records a load-widened sampling race. These support load sensitivity as a class, not a match to this exact arm-5 failure.\n• FLAKE-LEDGER.md:38 records rotating 30 s brain-ready failures under daemon storm (DIFFERENT branch). :43 records engine-room minted-not-resumed sampling race that reproduced quietly and at baseline (warning against calling every ER red load-only). No exact briefing arm-5 load recurrence was found in the searched hazard/infra/flake history.\n• IR-50 history at INFRA-REGISTER.md:2872-2878 records this cell's former false blank-stderr panel, fixed in 72efb6a by reading inherited and redirected sinks. Candidate helper :278-289 reads both; present failure is not that old observer defect. KNOWN-HAZARDS 5.15/5.16 (:315-325) records bind/daemon write races and explicitly warns that timing widening can expose a real product race.\n• Linux 55.963 s serialized Phase B PASS is user-supplied evidence for this same candidate, not a rerun by this scout. It argues against an unconditional cross-platform logic failure; it does not cover ConPTY, Windows process scheduling/PID/handle behavior or the same eligibility interleaving, and whole-cell timings combine different phases.\n• PREDICTION [INFERENCE]: on doyle's quiet Windows rerun, this cell will pass; specifically arm 5 will produce a different delivered native-inject row with pending=0 before its 45 s observation expires and will not emit the new-generation eligibility-expired warning. That is stronger than predicting a faster total duration. A repeat of row=2 pending plus the new-generation broker.rs:2274 warning on the quiet run falsifies this immediate clearance prediction and strengthens a reproducible candidate/platform eligibility seam. A pass does NOT eliminate a load-sensitive candidate regression or prove load was the cause; attribution still lacks same-platform baseline comparison and per-conjunct eligibility evidence."
}