The Spec That Doesn't Lie

Dev.to / 6/10/2026

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Key Points

  • The author of “The Level 5 Engineer — Issue #5” explains that while earlier issues showed agents following well-written specifications, this issue focuses on what happens when a spec is intentionally imprecise even if it is syntactically valid and tests pass.
  • By writing intentionally “bad” Gherkin, running an agent to build from it, then rewriting the spec and repeating the process, the article isolates how ambiguity in requirements leads to different implementations.
  • The piece is framed as a public learning log from a senior software engineer aiming to reach “Level 5,” crediting Dan Shapiro’s “Five Levels” framework and Nate B. Jones’s AI coding level perspectives.
  • A key takeaway is that poor specs can feel complete to the author because implementation-referential details seem obvious, yet readers (and agents) interpret them differently.
  • The article motivates deliberate specification practices to reduce ambiguity-driven “looks precise” failure modes in AI-assisted development workflows.

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