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database-transactions

Define transaction boundaries, locking, and consistency guarantees for multi-step writes. Use when designing atomic operations, retries, idempotency, or concurrent write behavior.

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包含的文件(3)

  • SKILL.md1.4 KB
  • evals/evals.json1.1 KB
  • references/isolation-levels.md1.9 KB

SKILL.md(原文)

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Database Transactions

Priority: P0 (CRITICAL)

One business action should have one clear consistency strategy.

Rules

  • Define the unit of work before choosing transaction scope.
  • Keep transaction bodies short and purposeful.
  • Record isolation, lock, retry, and idempotency expectations for contested writes.
  • Split eventually consistent workflows from truly atomic ones.

Verify

  • Transaction boundary matches one business action.
  • Isolation or locking tradeoff is explicit.
  • Retry and idempotency behavior is defined for duplicate or concurrent requests.
  • External side effects are not hidden inside a DB transaction without compensation.

Anti-Patterns

  • No giant transaction scripts: long units increase contention and failure blast radius.
  • No retry without idempotency: duplicate writes become correctness bugs.
  • No mixed atomicity story: define what is immediate vs eventual.

References

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