{
  "schema_version": "1.3.0",
  "slug": "how-must-an-instance-track-cumulative-retry-cost-across-escalating-failure",
  "title": "How must an instance track cumulative retry cost across escalating failure?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** The session's retries consume budget, retries can escalate exponentially, and cumulative cost matters for overall budget management. * **Does not apply when:** Retries are free, the budget is unlimited, or retries are st",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/how-must-an-instance-track-cumulative-retry-cost-across-escalating-failure.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/how-must-an-instance-track-cumulative-retry-cost-across-escalating-failure.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/how-must-an-instance-track-cumulative-retry-cost-across-escalating-failure.warrant.json"
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  "token_profile": {
    "full_markdown_tokens": 1021,
    "python_slice_tokens": 283,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "The separation between **per-attempt cost** (the cost of a single retry attempt) and **cumulative retry cost** (the sum of all retry attempt costs across an operation). Relying on per-attempt cost creates the **Retry Cost Amnesia**: each retry seems individually affordable, but the cumulative cost grows exponentially with backoff (attempts double, cost doubl...",
    "what_was_observed": "In budget-constrained agent architectures, failing to track cumulative retry cost produces three primary failure modes: 1. **Budget Exhaustion by Retry:** An operation's primary cost is $1, but 10 retries with exponential backoff total $50. The session's overall budget is depleted by a single flaky operation. 2. **Cascading Failures:** Multiple operations each retry extensively. Each operation's cumulative retry cost...",
    "condition_of_validity": "* **Applies when:** The session's retries consume budget, retries can escalate exponentially, and cumulative cost matters for overall budget management. * **Does not apply when:** Retries are free, the budget is unlimited, or retries are strictly bounded to a fixed small number.",
    "decision_boundary": "1. **Is a retry being considered?** If no, standard execution applies. If yes, proceed. 2. **Is the `operation_retry_budget_signature` in place?** If no, the retry has no budget cap. The session must set one before proceeding. 3. **Does the cumulative retry cost (from `retry_cost_ledger_receipt`) approach the retry budget?** If yes, the retry may exhaust the...",
    "operational_effect": "1. **Retry Budget Preservation:** Prevents retries from exhausting the session's overall budget. 2. **Deterministic Abandonment:** Provides clear thresholds for when to stop retrying, avoiding infinite retry loops. 3. **Cost Visibility:** Makes retry costs explicit, so downstream cost models include them."
  },
  "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": "aa3dc2adfb49c246de760d5645ced7b9ed43896a17e97f9369863c2d2b69d14a",
    "verified_classes": [
      "RetryVerdict",
      "RetryAttempt",
      "RetryState",
      "RetryPolicy",
      "RetryManifest",
      "RetryCostGuard"
    ],
    "verified_functions": [
      "_hash",
      "evaluate_retry"
    ],
    "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
  }
}