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tool-design-execution

Design how an agent tool runs: sync or async job, idempotency, timeouts, transactions, and compensation. Use when a tool is slow, has side effects that a retry could duplicate, or spans several systems.

plugins/runtypelabs/skills/skills/tool-design-execution/SKILL.md

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# Tool Execution Design

Agents retry. They retry on timeouts, on ambiguous errors, and sometimes on nothing at
all. Execution design makes that safe: bounded time, safe repetition, and consistent
state when a multi-step operation fails halfway.

## Procedure

1. **Measure or estimate the wall-clock time** of the operation: typical (p50) and
   worst case (p99).
2. **Pick the access pattern**: synchronous for bounded seconds, async job for minutes,
   streaming when partial output is useful as it arrives, event-driven when the tool
   notifies rather than answers.
3. **For every command tool, decide the retry story**: natural idempotency, an