@startuml ppt-maker-workflow
skinparam defaultFontName Arial
skinparam backgroundColor #FAFAFA

actor User
participant "ppt-maker\nSkill" as SKILL
participant "ppt-maker.js" as ENGINE

User -> SKILL : "生成一份PPT: <描述>"
SKILL -> SKILL : generate Markdown content
SKILL -> ENGINE : node ppt-maker.js -i input.md -o out.pptx -t <theme>

ENGINE -> ENGINE : parse slides\n(# → cover, ## → content, ## 感谢 → end)

loop each ## slide
  ENGINE -> ENGINE : scan headings for chart keywords
  alt chart keyword found & table present
    ENGINE -> ENGINE : render pie / bar / line chart
  else
    ENGINE -> ENGINE : render text / list / table
  end
end

ENGINE --> User : output.pptx
@enduml