SkillChain: Closing the Loop on Skill Evolution for Image-Based E-Commerce AI Assistants
For e-commerce platforms deploying LLM-based image assistants, SkillChain addresses the challenge of managing heterogeneous user intents without manual engineering, enabling scalable skill evolution.
SkillChain automates the lifecycle of Skills for image-based e-commerce AI assistants, improving aggregate response quality with significant gains in user engagement, content consumption, and long-term retention in a one-week online A/B experiment.
Image-based AI assistants are now deployed at production scale on e-commerce platforms, where a single uploaded image can trigger fundamentally different user intents: product search, style recommendation, visual encyclopedia, or utility tool calls, each demanding its own response format, tool invocation, and domain knowledge. Without per-intent behavioral constraints, LLM-based systems conflate these heterogeneous modes and fall short of domain quality standards, while the breadth and dynamism of the intent space render manual engineering infeasible. To address this, we present SkillChain, which closes the production feedback loop on Skill evolution, automating the lifecycle of Skills through three stages: Skill Creator for bootstrapping from task specs and trajectories, Route Optimizer for routing alignment, and Body Refiner for iterative Skill Body refinement via dual-path LLM-Judge evaluation. Deployed on a production-scale e-commerce image assistant, SkillChain substantially improves aggregate response quality, with the strongest gains on structural compliance and content quality; a one-week online A/B experiment further confirms significant gains in user engagement, content consumption, and long-term retention.