What problem does it solve? Seedance 2.0 generations often fail with blurry, jittery, off-prompt, morphing, blocked, or desynced output, and users typically respond by adding more adjectives instead of fixing the actual cause. This Skill performs root-cause diagnosis on failed video generations and produces a targeted repair instead of a blind rewrite. ## Core Features & Use Cases - Diagnostic Tree: Maps 20+ symptoms (identity drift, camera jumps, lip-sync failure, blocked prompts, continuation degradation, continuity breaks) to likely causes and first repairs. - Mechanism-Based Diagnosis: Falls back to model-mechanics reasoning (attention dilution, prior conflict, summoned negation, broken trajectory) when no tree row matches. - Conservative Retry Pattern: Outputs one minimal-change retry prompt with preservation constraints, plus an optional creative variant. - Use Case: A user's I2V clip changes the product's appearance mid-shot. The Skill identifies that the prompt re-described visible identity, recommends adding preservation constraints and removing duplicate static detail, then returns a repaired prompt. ## Quick Start Ask the agent to diagnose why your Seedance 2.0 video came out blurry and off-prompt, and to produce a fixed retry prompt.