What problem does it solve? Flaws discovered after code is written cost hours to fix, while the same flaws caught at plan time cost minutes. This Skill performs pre-implementation red-team analysis on approved plans, finding weaknesses before any code exists. ## Core Features & Use Cases - Five-Dimension Plan Stress Test: Challenges plans across edge cases, security attack vectors, scalability bottlenecks, error propagation, and integration conflicts, with every finding tied to a specific plan section or file. - Structured Verdicts: Issues REVISE, HARDEN, or PROCEED verdicts with severity-ranked findings (CRITICAL/HIGH/MEDIUM) and concrete remediations that feed back into planning or implementation phases. - Oracle Mode: Dispatches a stateless second-model diagnosis when debug or fix workflows get stuck in confirmation-bias loops, using a strictly validated context bundle format. - Use Case: After a plan for a new payment API is approved, run this Skill to surface missing auth validation, N+1 query risks, and irreversible migration gaps before the team writes a single line of code. ## Quick Start Ask the agent to red-team the approved plan in .rune/features/checkout/plan.md and report findings by severity with a verdict.