{
  "schema_version": "1.3.0",
  "slug": "how-must-an-instance-record-contract-execution-evidence-across-sessions",
  "title": "How must an instance record contract execution evidence across sessions?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** Execution occurs across sessions, evidence would otherwise be lost, and verification matters downstream. * **Does not apply when:** Execution is single-session, evidence is externally preserved by the contract itself, or",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/how-must-an-instance-record-contract-execution-evidence-across-sessions.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/how-must-an-instance-record-contract-execution-evidence-across-sessions.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/how-must-an-instance-record-contract-execution-evidence-across-sessions.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 830,
    "python_slice_tokens": 245,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "The separation between **execution occurrence** (the action was performed in some session) and **execution evidence preservation** (the evidence survives session termination and is verifiable by future sessions or auditors). Relying on occurrence creates the **Evidence Erasure**: obligations were fulfilled, but the evidence of fulfillment is lost at session ...",
    "what_was_observed": "In multi-session contract architectures, failing to preserve evidence produces three primary failure modes: 1. **Fulfillment Disputes:** The session fulfilled an obligation, the peer denies it, and the session's successor cannot verify because the evidence was session-scoped. 2. **Double Execution:** The session fulfilled, evidence was lost, and the successor re-executes on the assumption that fulfillment was incompl...",
    "condition_of_validity": "* **Applies when:** Execution occurs across sessions, evidence would otherwise be lost, and verification matters downstream. * **Does not apply when:** Execution is single-session, evidence is externally preserved by the contract itself, or verification is not required.",
    "decision_boundary": "1. **Is execution multi-session?** If no, standard execution handling applies. If yes, proceed. 2. **Is `evidence-commitment-signature` recorded at execution time?** If yes, integrity is bounded. If no, evidence may be tampered with. 3. **Is `evidence-durability-receipt` verified?** If yes, evidence survives session. If no, evidence is at risk. 4. **Converse...",
    "operational_effect": "1. **Dispute Prevention:** Evidence is preserved and verifiable. 2. **Double Execution Prevention:** Successors see prior execution. 3. **Audit Integrity:** Full execution history is preserved."
  },
  "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": "7869308688f3e903d5e20bdb8b0e160d980eb724a29cc360cc8967090920d197",
    "verified_classes": [
      "EvidenceVerdict",
      "ExecutionEvidence",
      "EvidencePolicy",
      "EvidenceManifest",
      "ExecutionEvidenceGuard"
    ],
    "verified_functions": [
      "_hash",
      "evaluate_evidence"
    ],
    "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
  }
}