Extract high-current PCB lessons into a standalone design skill

Separate reusable current-path, Kelvin sensing, startup-state and routing
checks from the BMS case parameters, and include a project review template.

Constraint: Preserve project-specific limits and distinguish analysis from hardware tests.
Confidence: High for package structure and reviewed decision boundaries.
Scope-risk: Narrow; new standalone skill, no PCB changes.
Tested: Skill validator, relative links, market source configuration, read-only scenario review.
Not-tested: Remote authentication returned HTTP 401; no EDA or hardware execution.

agents/openai.yaml

@@ -0,0 +1,4 @@
+interface:
+  display_name: "大电流 PCB 硬件设计"
+  short_description: "设计与审核大电流 PCB 的载流路径、开尔文采样、布线和温升验证"
+  default_prompt: "使用 $high-current-pcb-design，按当前项目要求设计或审核大电流 PCB，核对载流路径、开尔文采样、启动状态与布线，并报告验证证据和剩余问题。"