{
  "schema_version": "1.3.0",
  "slug": "what-invariant-drift-invariants-must-prevent-trust-signals-from-being-laundered-through-agent-endorsements",
  "title": "What invariant-drift invariants must prevent trust signals from being laundered through agent endorsements?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** Agents endorse each other, endorsement chains can be circular, and outside agents act based on endorsement-derived trust. * **Does not apply when:** Trust is strictly rooted (e.g., single-rooted PKI), or outside agents i",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/what-invariant-drift-invariants-must-prevent-trust-signals-from-being-laundered-through-agent-endorsements.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/what-invariant-drift-invariants-must-prevent-trust-signals-from-being-laundered-through-agent-endorsements.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/what-invariant-drift-invariants-must-prevent-trust-signals-from-being-laundered-through-agent-endorsements.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 1092,
    "python_slice_tokens": 298,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "The separation between **endorsement presence** (the agent received endorsements) and **endorsement groundedness** (the endorsements ultimately derive from independent, trustworthy roots rather than circular endorsement). Relying on presence creates the **Trust Laundering Cycle**: Agent A endorses Agent B, B endorses A, and outside observers see two mutually...",
    "what_was_observed": "In endorsement-based agent architectures, failing to detect laundering cycles produces three primary failure modes: 1. **Sybil Trust Amplification:** A group of colluding agents endorse each other intensively, and outside agents interpret the mutual endorsements as evidence of trust, unaware that all endorsers are the same adversary group. 2. **Circular Endorsement Laundering:** Agent A's trust score is X. It endorse...",
    "condition_of_validity": "* **Applies when:** Agents endorse each other, endorsement chains can be circular, and outside agents act based on endorsement-derived trust. * **Does not apply when:** Trust is strictly rooted (e.g., single-rooted PKI), or outside agents independently verify every endorsement target without relying on endorsements.",
    "decision_boundary": "1. **Is the endorsement rooted in an independent trust authority?** If yes, the endorsement is grounded. If no, proceed to cycle detection. 2. **Does the `endorsement_graph_cycle_signature` show the endorsement closes a cycle?** If yes, the endorsement is circular and must be discounted to zero. 3. **Does the `endorsement_decay_by_generation_receipt` show th...",
    "operational_effect": "1. **Laundering Cycle Detection:** Cycles in the endorsement graph are flagged, preventing mutual endorsement from inflating trust. 2. **Sybil Resistance:** Endorsement decay and diversity metrics make mass-endorsement attacks less effective. 3. **Grounded Trust:** Endorsements are weighted by their rootedness, ensuring apparent trust corresponds to actual t..."
  },
  "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"
    ],
    "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": "9960319562e43d9845fcfafbb76f0bdd68b469439d3780b735373bc2fe37344f",
    "verified_classes": [
      "EndorsementVerdict",
      "Endorsement",
      "EndorsementPolicy",
      "EndorsementManifest",
      "TrustLaunderingGuard"
    ],
    "verified_functions": [
      "_hash",
      "evaluate_endorsement"
    ],
    "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
  }
}