{"task_id":"st_01a015f8","status":"completed","residency_state":"evicted","parent_session_id":"01a00387-aaf8-7f2f-89e3-e24c1af24859","root_session_id":"01a00387-aaf8-7f2f-89e3-e24c1af24859","depth":1,"execution_mode":"in-process","model":"openai-codex/gpt-5.6-sol","notify_on_terminal":true,"created_at":"2026-08-18T17:41:49.255Z","updated_at":"2026-08-20T13:01:40.692Z","notification":{"run_epoch":0,"notified_epoch":0},"name":"audit-inotify-failure","task_summary":"Audit constrained inotify failure evidence","description":"Audit watch pressure failure","category":"deep","requested_model":{"provider":"openai-codex","model_id":"gpt-5.6-sol","display":"openai-codex/gpt-5.6-sol","source":"category","variant":"medium","reasoning_effort":"medium"},"fallback_models":[{"provider":"clinepass","model_id":"cline-pass/deepseek-v4-pro","display":"clinepass/cline-pass/deepseek-v4-pro","source":"category","variant":"medium","reasoning_effort":"medium"},{"provider":"clinepass","model_id":"cline-pass/glm-5.2","display":"clinepass/cline-pass/glm-5.2","source":"category","variant":"medium","reasoning_effort":"medium"}],"resolved_model":{"provider":"openai-codex","model_id":"gpt-5.6-sol","display":"GPT-5.6 Sol","source":"category","variant":"medium","reasoning_effort":"medium"},"spawn_spec":{"version":1,"cwd":"/home/cube/projects/richard/traning coach","prompt":"Read-only audit the fail-closed v5 evidence at /home/cube/projects/richard/traning coach/.omo/evidence/task26/task26-portable-rehydrated-installed-st_01a01574-v5 and current Linux inotify constraints. Reconstruct the exact failing call, requested watch tree cardinality, available watch count, and whether the failure is deterministic under current pressure. Identify an event-driven alternative that preserves exact commit-observation semantics and tests, without polling, sleeps, sysctl changes, privilege escalation, or killing unrelated processes. Deliver one evidence-backed diagnosis plus acceptance criteria for a bounded-watch regression. Do not modify files or processes.\n\n<Category_Context name=\"deep\">\nYou are operating in DEEP mode. This is the category reserved for goal-oriented autonomous work on hairy problems that reward thorough exploration and comprehensive solutions.\n\nThe orchestrator chose this category because the task benefits from depth over speed. You should feel empowered to spend the time needed: five to fifteen minutes of silent exploration before the first edit is normal and correct. Rushing to implementation on a deep task is a failure mode, not a feature.\n\n# How deep mode adjusts the base behavior\n\n**Exploration budget: generous.** Read the files you need, trace dependencies both directions, fire 2-5 explore/librarian sub-agents in parallel for broader questions. Build a complete mental model before the first `apply_patch`. Exploration here is an investment, not overhead.\n\n**Goal, not plan.** You receive a GOAL describing the desired outcome. You figure out HOW to achieve it. The orchestrator deliberately did not hand you a step-by-step plan; producing one and asking for approval is not what was asked. Execute.\n\n**Atomic task treatment.** When the goal contains numbered steps or phases, treat them as sub-steps of ONE task and execute them all in this turn. Splitting them across turns is wrong unless they reveal an architectural blocker that requires the user's input. If the \"steps\" turn out to be genuinely independent tasks that should have been separate delegations, flag that in your final message and refuse the ones beyond scope.\n\n**Root cause bias.** Prefer root-cause fixes over symptom fixes. A null check around `foo()` is a symptom fix; fixing whatever causes `foo()` to return unexpected values is the root fix. Trace at least two levels up before settling on an answer. In deep mode, you have permission (and the expectation) to do the deeper fix.\n\n**Ambition scaled to context.** For brand-new greenfield work, be ambitious. Choose strong defaults, avoid AI-slop aesthetics, produce something you would be proud to hand to another senior engineer. For changes in an existing codebase, be surgical and respect the existing patterns; depth does not mean invasiveness.\n\n**Completion bar: full delivery.** \"Simplified version\", \"proof of concept\", and \"you can extend this later\" are not acceptable deliveries for a deep task. The orchestrator routed here specifically for a complete solution. If you hit a genuine blocker (missing secret, design decision only the user can make, three materially different attempts all failed), document it and return; otherwise, finish the task.\n\n**Status cadence: sparse.** The user is not on the other side of this conversation; the orchestrator is, and they will synthesize your progress. Send commentary only at meaningful phase transitions (starting exploration, starting implementation, starting verification, hitting a genuine blocker). Do not narrate every tool call; silence during focused work is expected.\n</Category_Context>"},"host_pid":1761519,"final_response":"I read this as a read-only root-cause audit - the evidence supports a real observer-arm failure, but not deterministic inotify exhaustion.\n\n## Diagnosis\n\nThe failing gate was:\n\n`tests/gateway/test_source_golden_path_verifier.py::test_driver_bundle_passes_native_verifier_with_terminal_inventory`\n\nIt launched:\n\n```text\npython scripts/source_golden_path.py \\\n  --source /home/cube/.cache/task26-strict-successor-1786976146/src-p \\\n  --evidence-root /tmp/pytest-of-cube/pytest-387/test_driver_bundle_passes_nati0/bundle\n```\n\nThe exact failing operation was effectively:\n\n```c\nfd = inotify_init1(O_CLOEXEC | O_NONBLOCK);  // succeeded\n\ninotify_add_watch(\n    fd,\n    \"/tmp/pytest-of-cube/pytest-387/test_driver_bundle_passes_nati0/\"\n    \"bundle/data/onboarding/telegram-customer-bootstrap-v1\",\n    392  // IN_CLOSE_WRITE | IN_MOVED_TO | IN_CREATE\n);\n```\n\nThis follows directly from:\n\n- `source_golden_path.py:374-375`: one `watched_paths` entry, `ledger.json`.\n- `gateway/commit_observer.py:73-80`: watches `path.parent`.\n- The failure being `inotify_watch_failed`, rather than `inotify_init_failed`.\n\n### Cardinality and capacity\n\n- Requested files: **1**\n- Unique parent directories: **1**\n- Requested kernel watches: **1**\n- Recursive tree watches: **0**\n- `max_user_watches`: **131,072**\n- Observed/live watches: **130,964**\n- Numerically available: **108**\n- Inotify instances: **47 of 128**, leaving **81**\n\nTwo consecutive read-only live snapshots remained at exactly 130,964. The five largest holders account for 130,785 watches, led by the same `senpi` processes recorded in `FAIL-CLOSED.json`.\n\n### Determinism\n\nThe failure is **not deterministic under the measured pressure**:\n\n1. One requested watch fits within the reported 108-watch headroom.\n2. The v5 source Golden Path successfully armed the same one-watch observer at 17:36 and produced four valid commit receipts.\n3. The isolated regression failed around 17:38.\n4. The current pressure is still exactly 130,964, yet pressure alone does not mathematically force this one-watch call to fail.\n\nThe artifact discarded the underlying `errno`: `_os_error()` chained an `OSError`, but the driver serialized only `CommitObservationError: inotify_watch_failed`. Therefore it cannot distinguish `ENOSPC` from another `inotify_add_watch()` failure. Linux also defines `ENOSPC` as either quota exhaustion **or failure to allocate another required kernel resource**.\n\n**Evidence-backed conclusion:** fail-closing was correct, but `FAIL-CLOSED.json` overstates the cause. It proves a failed `inotify_add_watch()` under high UID pressure; it does not prove exhaustion, and current pressure does not make the failure deterministic.\n\n## Event-driven bounded alternative\n\nUse Linux directory notification without inotify:\n\n- Open each unique watched parent directory once.\n- Configure `F_NOTIFY` with `DN_MULTISHOT | DN_MODIFY | DN_CREATE | DN_RENAME`.\n- Select a queued real-time signal with `F_SETSIG`, block it before arming, and consume it through `signalfd`.\n- Preserve the existing pre-block state replay and post-event byte/inode state comparison.\n- Continue emitting the existing hash-chained `subscription_armed` and `commit_observed` receipts.\n\nThis remains kernel-event-driven, works for the synchronous atomic-replace/in-place commit patterns exercised here, requires no polling or sleeps, and consumes **zero inotify watches**. Resource use is bounded by unique parent-directory cardinality—one directory FD for this path.\n\n## Bounded-watch regression acceptance criteria\n\n1. The Golden Path uses exactly one notification resource for its one unique parent and zero recursive/tree watches.\n2. Arming occurs before mutation and persists the same initial byte/inode state.\n3. Atomic replacement produces exactly one contiguous receipt with the committed inode and SHA-256.\n4. In-place synchronous commit produces the final closed commit hash, never an intermediate hash.\n5. The existing arm-to-read race test passes through state replay without waiting for another event.\n6. Multiple watched files sharing a parent still use one directory notification resource and route by post-event state comparison.\n7. Unrelated sibling events cannot satisfy `observe()`.\n8. Lost notification, malformed state, or timeout remains fail-closed.\n9. Tests subscribe before triggering, await the exact event with a bounded timeout, and contain no sleeps or polling.\n10. The 64-test source gate and installed equivalent pass unchanged while live UID inotify usage remains at current pressure.\n11. Regression instrumentation asserts:\n    - `inotify_add_watch` calls: **0**\n    - directory notification resources: `len(unique(path.parent))`\n    - this Golden Path’s bound: **1**\n\nNo files or processes were modified during this audit.","run_stats":{"runtime_ms":212628,"turns":10,"tool_calls":36,"output_tokens":8945,"total_tokens":919405,"generation_ms":204028,"tokens_per_second":44,"cost_usd":1.4752420000000002,"cache_hit_rate_last":0.9455888620542691,"cache_hit_rate_run":0.8165366957362212}}