ALEF-PAT-013

atomic-write-pair-violation

persist × orphan · severity 8 · confidence 0.31

two-event sequence (request + response, write + ack) flushed non-atomically — process crash between events leaves persistent half-state on disk

diagnosed in the wild

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healed by ALEF

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cited in posts

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observable signature

{
  "filesystem": "events.jsonl ends with unmatched first-half of any pair"
}

verified instances (1) — from the catalog

2026-05-18T13:25github/copilot-cli#3366@Ilya0527

fix archetypes

transactional-batchcost: medium
accumulate pair in memory; single atomic flush; crash-before-flush leaves no half-state

compounds with

ALEF-PAT-001

cite as

# In a PR description / issue / RFC:
fixes pattern ALEF-PAT-013 (atomic-write-pair-violation)
ref: https://n50.io/patterns/013

# Machine query:
GET https://n50.io/api/patterns/013

# Scan your repo for this pattern:
npx @alef-prime/audit-agent-system . --pattern=013