{
  "schema_version": "1.3.0",
  "slug": "what-communication-invariants-prevent-fan-out-storms-when-a-broadcast-is-amplified-through-a-mesh",
  "title": "What communication invariants prevent fan-out storms when a broadcast is amplified through a mesh?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** The network is a mesh with multiple paths, broadcast messages can re-broadcast, and the mesh is finite in capacity. * **Does not apply when:** The network is strictly point-to-point, or messages are not re-broadcast (sin",
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    "unified_markdown_uri": "https://corpusfetch.com/c/what-communication-invariants-prevent-fan-out-storms-when-a-broadcast-is-amplified-through-a-mesh.md",
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    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/what-communication-invariants-prevent-fan-out-storms-when-a-broadcast-is-amplified-through-a-mesh.warrant.json"
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  "remnant_summary": {
    "core_distinction": "The separation between **broadcast intent** (one sender intends to reach many receivers) and **fan-out amplification** (the message is replicated beyond the sender's intent through re-broadcast, causing exponential network load). Relying on broadcast creates the **Mesh Amplification Hazard**: a single message with fanout=10, re-broadcast by each receiver to ...",
    "what_was_observed": "In mesh agent architectures, failing to control fan-out produces three primary failure modes: 1. **Broadcast Storm:** A high-priority broadcast is re-broadcast by every receiver without deduplication, generating millions of duplicate messages. 2. **Priority Inversion:** Low-priority broadcasts amplify more aggressively than high-priority messages, causing high-priority messages to be delayed behind storm traffic. 3. ...",
    "condition_of_validity": "* **Applies when:** The network is a mesh with multiple paths, broadcast messages can re-broadcast, and the mesh is finite in capacity. * **Does not apply when:** The network is strictly point-to-point, or messages are not re-broadcast (single-path delivery).",
    "decision_boundary": "1. **Is the message a broadcast or point-to-point?** If point-to-point, standard delivery applies. If broadcast, proceed. 2. **Has the message's TTL expired?** If yes, do not re-broadcast. If no, proceed. 3. **Is the message ID in the deduplication filter?** If yes, it is a duplicate; do not re-broadcast. If no, proceed. 4. **Has the node exhausted its fanou...",
    "operational_effect": "1. **Storm Prevention:** TTL, deduplication, and quotas prevent exponential amplification. 2. **Priority Preservation:** Critical messages bypass quotas, ensuring they reach the intended recipients. 3. **Network Stability:** Reduces mesh load, preserving capacity for legitimate traffic."
  },
  "matched_failure_symptoms": [
    "DOMAIN:EPISTEMIC_PROVENANCE_AND_FEDERATION_ROUTING"
  ],
  "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"
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    "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"
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  },
  "empirical_verification_warrant": {
    "status": "AST_AND_INVARIANT_VERIFIED",
    "syntax_valid": true,
    "code_sha256": "1340f53c3d13be6f48f303799b82b1e181d27b89e4f4896c9ac3e453a301c928",
    "verified_classes": [
      "FanoutVerdict",
      "BroadcastMessage",
      "MeshNodeState",
      "FanoutPolicy",
      "FanoutManifest",
      "MeshFanoutGuard"
    ],
    "verified_functions": [
      "_hash",
      "evaluate_broadcast"
    ],
    "verified_functions_count": 2,
    "defensive_guards_count": 0,
    "raised_exceptions": [],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [
      "dataclasses",
      "enum",
      "hashlib",
      "json"
    ],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}