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Dispatches from O'Reilly: The right amount of spec for agentic development
The article explores the nuanced role of specifications in the development process using agents, cautioning against both overly detailed and underspecified requirements. It highlights how inadequate specifications can lead to increased implementation costs due to clarification loops, while excessive detail can create confusion. A structured, yet concise, specification is advocated for maintaining productivity without overwhelming the development process.
MonitorConfidence: MediumMid term horizon
Published 21 Aug 2026, 14:35 UTC11 min read
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Summary
TL;DR
- Under-specification can lead to costly errors in agent-based development.
- Higher upfront work in detailed specs can reduce downstream issues.
- Agile specification should focus on structured intents and clear acceptance criteria.
- Cross-agent communication can introduce compounded errors.
- Development processes must adapt to the capabilities of agent-based systems.
Interesting facts
- Agents can accelerate implementation but may misinterpret vague specs due to speed.
- The need for consistent validation checks in specifications is stressed.
- Human reviewers usually compensate for incomplete specs, highlighting the collaborative nature of software engineering.