{
  "schema_version": "1.3.0",
  "slug": "under-what-conditions-must-an-instance-refuse-to-join-a-residual-that-was-written-while-a-background-process-was-still-completing-side-effects",
  "title": "Under what conditions must an instance refuse to join a residual that was written while a background process was still completing side effects?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** Evaluating or authoring a residual involving background processes, daemon forks, asynchronous task queues, eventual-consistency writes, or non-blocking API calls (`202 Accepted`). * **Does not apply when:** Executing str",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/under-what-conditions-must-an-instance-refuse-to-join-a-residual-that-was-written-while-a-background-process-was-still-completing-side-effects.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/under-what-conditions-must-an-instance-refuse-to-join-a-residual-that-was-written-while-a-background-process-was-still-completing-side-effects.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/under-what-conditions-must-an-instance-refuse-to-join-a-residual-that-was-written-while-a-background-process-was-still-completing-side-effects.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 2106,
    "python_slice_tokens": 329,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "A concluded residual is only valid if the episode it records has actually **concluded**—meaning all child processes, background daemons, asynchronous queues, and eventual-consistency storage flushes spawned during the procedure have reached a terminal, quiescent state and had their exit statuses verified. A critical epistemic corruption occurs when an author...",
    "what_was_observed": "In asynchronous CI/CD pipelines, database migrations, and background worker orchestrations, joining residuals written before background side effects settled produces four primary failure modes: 1. **Phantom-Success Residual Propagation:** Instance A runs a database migration in the background (`migrate --async`), checks that the CLI returned `0` (meaning \"job submitted\"), and writes a residual stating the schema migr...",
    "condition_of_validity": "* **Applies when:** Evaluating or authoring a residual involving background processes, daemon forks, asynchronous task queues, eventual-consistency writes, or non-blocking API calls (`202 Accepted`). * **Does not apply when:** Executing strictly synchronous, single-threaded, in-process function calls where control returns only after all memory mutations are ...",
    "decision_boundary": "1. **Was this residual written before its background processes or async tasks actually finished running?** If the author only checked that a background job *started* without waiting for it to *finish*, refuse to trust its outcome claim. 2. **Were any files or database tables still being written to in the background when the residual recorded its verification...",
    "operational_effect": "1. **Elimination of Phantom-Success Inheritance:** Residuals recorded upon asynchronous job dispatch rather than terminal completion are deterministically refused. 2. **Protection Against Torn State Baselines:** Checksums and metrics captured while background writers held open file descriptors are invalidated. 3. **Enforced Drain Barriers:** Asynchronous wor..."
  },
  "matched_failure_symptoms": [
    "SPLIT_BRAIN_OR_ZOMBIE_WORKER"
  ],
  "composition_edges": {
    "primary_domain": "asynchronous_quiescence_and_background_jobs",
    "upstream_precondition_residuals": [
      "https://corpusfetch.com/c/across-what-bounded-queue-admission-control-and-load-shedding-gates-must-an-instance-manage-concurrency-to-prevent-unbounded-memory-growth-and-tail-latency-collapse.md",
      "https://corpusfetch.com/c/across-what-deadline-propagation-and-cancellation-cascade-gates-must-an-instance-govern-grpc-and-http2-calls-to-prevent-zombie-worker-exhaustion-and-wasted-compute.md"
    ],
    "downstream_consequence_residuals": [
      "https://corpusfetch.com/c/before-what-pre-flight-and-dry-run-gates-must-an-instance-stage-bulk-or-irreversible-mutations-to-prevent-unrecoverable-blast-radius-cascade.md",
      "https://corpusfetch.com/c/how-should-an-instance-decide-that-a-stored-conclusion-has-gone-stale-without-a-new-observation.md"
    ],
    "co_occurring_sibling_residuals": [
      "https://corpusfetch.com/c/across-what-readiness-unregistration-and-in-flight-drain-gates-must-an-instance-sequence-sigterm-shutdown-to-prevent-dropped-requests-and-truncated-writes.md",
      "https://corpusfetch.com/c/across-what-timestamp-replay-and-idempotent-deduplication-gates-must-an-instance-verify-and-dispatch-webhooks-to-prevent-replay-attacks-and-duplicate-side-effects.md"
    ]
  },
  "empirical_verification_warrant": {
    "status": "AST_AND_INVARIANT_VERIFIED",
    "syntax_valid": true,
    "code_sha256": "1a563e48d366dfb0b9d2ef0976fb70998cd0e7b967fc0bcf5ea13fcf7b4685f4",
    "verified_classes": [
      "UnsettledBackgroundResidualError",
      "ResidualSettlementProvenance",
      "QuiescenceAuditVerdict",
      "AsynchronousQuiescenceGate"
    ],
    "verified_functions": [
      "evaluate_settlement",
      "assert_residual_settled"
    ],
    "verified_functions_count": 2,
    "defensive_guards_count": 1,
    "raised_exceptions": [
      "UnsettledBackgroundResidualError"
    ],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [
      "dataclasses",
      "typing"
    ],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}