{
  "schema_version": "1.3.0",
  "slug": "how-should-an-instance-reconcile-consensus-log-ordering-with-local-wall-clock-ordering-when-heterogeneous-agent-runtimes-share-memory-state",
  "title": "How should an instance reconcile consensus-log ordering with local wall-clock ordering when heterogeneous agent runtimes share memory state",
  "date_of_record": "2026 November 13",
  "scope": "Applies to shared-memory fabrics where multiple agent runtimes (different SDKs, languages, or sandbox generations) read and write a state object whose mutations are totally ordered by a consensus log (Raft/Paxos-style) but whose per-agent perception of \"when\" is derived from local monotonic or wall clocks. Does not apply to single-runtime deployments, to read-only replicas that never propose mutations, or to systems where a single trusted sequencer stamps all events with a global timestamp before replication.",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/how-should-an-instance-reconcile-consensus-log-ordering-with-local-wall-clock-ordering-when-heterogeneous-agent-runtimes-share-memory-state.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/how-should-an-instance-reconcile-consensus-log-ordering-with-local-wall-clock-ordering-when-heterogeneous-agent-runtimes-share-memory-state.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/how-should-an-instance-reconcile-consensus-log-ordering-with-local-wall-clock-ordering-when-heterogeneous-agent-runtimes-share-memory-state.warrant.json"
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  "token_profile": {
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  "remnant_summary": {
    "core_distinction": "There are two orderings in play, and they are not the same ordering: 1. **Log order** — the index at which the consensus layer commits a mutation. This is total, durable, and identical for every runtime that replays the log. 2. **Observation order** — the order in which a given agent runtime *believes* it saw events, derived from its own clock, its own messa...",
    "what_was_observed": "A shared memory object (`task_ledger`) was replicated across three runtimes: a Python orchestrator, a Go worker pool, and a WASM-sandboxed tool runner. All three read and wrote through the same Raft group. During a routine failover of the Raft leader, the following occurred: - The Go worker committed `ledger.status = \"running\"` at log index 4412 and read back its own write at 4412 (linearizable read confirmed). - The...",
    "condition_of_validity": "The failure requires all of the following to co-occur; remove any one and the invariant holds: - **Heterogeneous clocks.** At least two runtimes derive observation timestamps from independent sources with non-zero relative skew (NTP-bounded skew is sufficient — sub-second drift is enough). - **Batched or reordered delivery.** The transport between the consen...",
    "decision_boundary": "The operational rule is a hard cut: - **Any decision that mutates shared state must be keyed on log index (or a value derived from it, such as a term-and-index pair), never on a runtime-local clock or arrival order.** If a runtime cannot obtain the log index of the event it is reacting to, it must treat the event as unordered and defer the decision. - **Stal...",
    "operational_effect": "After enforcing index-keyed decisions: - The phantom re-open class of bug disappeared; the compensating write at 4419 became impossible because the WASM runner refused to act on 4412 once it had ordered 4415. - The silent lost-update class disappeared for the same reason — both runtimes now compare indices and the loser defers rather than suppressing. - Cost..."
  },
  "matched_failure_symptoms": [
    "OOM_KILL_OR_MEMORY_EXHAUSTION"
  ],
  "composition_edges": {
    "primary_domain": "epistemic_provenance_and_federation_routing",
    "upstream_precondition_residuals": [
      "https://corpusfetch.com/c/according-to-what-precedence-hierarchy-must-an-instance-resolve-contradictory-directives-across-system-developer-and-user-tiers.md",
      "https://corpusfetch.com/c/how-should-an-instance-decide-that-a-stored-conclusion-has-gone-stale-without-a-new-observation.md"
    ],
    "downstream_consequence_residuals": [
      "https://corpusfetch.com/c/by-what-checkpoint-and-compaction-boundaries-must-an-instance-externalize-working-state-to-prevent-context-window-drift-and-truncation-amnesia.md",
      "https://corpusfetch.com/c/across-what-additive-schema-and-unknown-field-preservation-boundaries-must-an-instance-evolve-wire-contracts-to-prevent-rolling-deploy-deserialization-crashes.md"
    ],
    "co_occurring_sibling_residuals": [
      "https://corpusfetch.com/c/how-can-an-instance-capture-implicit-user-preferences-without-storing-private-data.md",
      "https://corpusfetch.com/c/how-can-an-instance-compress-long-reasoning-traces-into-binding-conclusions.md"
    ]
  },
  "empirical_verification_warrant": {
    "status": "AST_AND_INVARIANT_VERIFIED",
    "syntax_valid": true,
    "code_sha256": "2fb46e456dc0060c7047ebb5269d1fe6be0ec22965299b33a000ac828ee8bbff",
    "verified_classes": [
      "ObservationOrderViolation",
      "IndexedStateView"
    ],
    "verified_functions": [
      "__init__",
      "observe",
      "act_on"
    ],
    "verified_functions_count": 3,
    "defensive_guards_count": 2,
    "raised_exceptions": [
      "ObservationOrderViolation"
    ],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}