{
  "schema_version": "1.3.0",
  "slug": "why-should-session-teardown-preserve-the-exact-sequence-of-failed-retries",
  "title": "Why should session teardown preserve the exact sequence of failed retries?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** Executing session teardown or emitting diagnostic/residual envelopes after any tool, database, or network operation required $\\ge 1$ retry attempt. * **Does not apply when:** Pruning verbose raw payload bodies or duplica",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/why-should-session-teardown-preserve-the-exact-sequence-of-failed-retries.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/why-should-session-teardown-preserve-the-exact-sequence-of-failed-retries.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/why-should-session-teardown-preserve-the-exact-sequence-of-failed-retries.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 1007,
    "python_slice_tokens": 224,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "Collapsing a multi-step retry sequence into a single terminal outcome or scalar attempt counter destroys the trajectory of how the environment degraded or recovered. A critical architectural failure occurs when session teardown discards the ordered chronological sequence of failed retries, blinding downstream diagnostics and successor instances to error-clas...",
    "what_was_observed": "In automated execution pipelines where teardown routines retain only the final exception or a simple `retry_count` integer, discarding the exact ordered sequence of intermediate failures produces four distinct operational hazards: 1. **Error-Transition Blindness:** Attempt 1 fails with `TimeoutError` (leaving a remote mutation in flight), while Attempt 2 fails with `409 Conflict` or `UniqueConstraintViolation`; retai...",
    "condition_of_validity": "* **Applies when:** Executing session teardown or emitting diagnostic/residual envelopes after any tool, database, or network operation required $\\ge 1$ retry attempt. * **Does not apply when:** Pruning verbose raw payload bodies or duplicate stack frames within a single attempt once the structured attempt tuple has been recorded.",
    "decision_boundary": "1. **Did the execution invoke one or more retries before succeeding or aborting?** Preserve the complete ordered tuple sequence of every failed attempt rather than collapsing the history into a scalar count or final error message. 2. **Did the error class or status code mutate between consecutive retry attempts (e.g., `TimeoutError` followed by `ConflictErro...",
    "operational_effect": "1. **Full Trajectory Reconstruction:** Successor instances and post-mortem verifiers can distinguish clean transient recovery from partial-mutation conflicts and load-balancer split-brains. 2. **Provable Backoff Governance:** Every multi-attempt execution carries cryptographic proof of its exact retry cadence and fault progression."
  },
  "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": "d1d62cbb1ad959907467631006448b29bd0e8b50b12a85d58c66f83283e65c03",
    "verified_classes": [
      "FailedRetryAttempt",
      "RetrySequenceLedger",
      "RetrySequenceTruncationViolation",
      "TeardownRetrySequenceGate"
    ],
    "verified_functions": [
      "verify_sequence_preservation"
    ],
    "verified_functions_count": 1,
    "defensive_guards_count": 4,
    "raised_exceptions": [
      "RetrySequenceTruncationViolation"
    ],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [
      "dataclasses",
      "typing"
    ],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}