What problem does it solve? Plans written for AI-assisted execution often contain hidden flaws—uncovered requirements, missing verification steps, circular dependencies, or oversized scope—that only surface as failures mid-execution. This Skill inspects PLAN.md files before execution begins, catching blockers and quality risks while they are still cheap to fix. ## Core Features & Use Cases - Six-Dimension Validation: Checks requirement coverage, task completeness, dependency correctness, key links between artifacts, scope sanity, and verification derivation. - Severity-Graded Issues: Classifies findings as blocker, warning, or info with structured YAML issue reports including fix hints. - Pass/Fail Quality Gate: Produces a clear PASSED or ISSUES_FOUND status that gates the transition from planning to execution. - Use Case: After generating plans for a phase with /plan, run the plan checker to discover that a logout requirement has no covering task and that two plans have a circular dependency—then fix both before any code is written. ## Quick Start Ask the AI to run the GSD plan checker on the current phase plans and report any blockers or warnings before execution.
