AI Review Exposes Three Critical Spec Gaps in Open-Source Dev Tool spec-sonar

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Developer tool spec-sonar underwent a structured review by AI model Fable 5, which was given 13 questions to evaluate a math tower-defense game specification across six modules. Fable identified three core ambiguities: missing unit stat values and a sunflower resource contradiction, an undefined zombie movement model affecting collision and win logic, and an irreconcilable conflict between auto-reconnect state restoration, socket-based player IDs, and a ban on account systems. The review also revealed that the tool's own STATE_FINAL.json contained schema drift — undeclared fields and an invalid enum value — which directly prompted a schema update to version 1.1. Fable further outlined four scenarios where an AI executor might silently bypass a do-not-build list, leading the team to introduce motivations, disguise boundaries, and testable negative acceptance criteria for each restriction.

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