@startuml ppt-maker-architecture
skinparam componentStyle rectangle
skinparam defaultFontName Arial
skinparam backgroundColor #FAFAFA

package "ppt-maker Skill" {
  component "SKILL.md\n(instructions)" as SKILL
  component "scripts/ppt-maker.js\n(core engine)" as ENGINE
  component "scripts/package.json\n(deps: pptxgenjs)" as PKG
}

package "ppt-maker.js Internals" {
  component "Markdown Parser\n(slides, headings, lists)" as PARSER
  component "Chart Detector\n(keyword → pie/bar/line)" as CHART
  component "Theme Engine\n(ocean/sunset/purple/...)" as THEME
  component "PPTX Renderer\n(pptxgenjs)" as RENDERER
}

actor User

User --> SKILL : natural language request
SKILL --> ENGINE : node ppt-maker.js -i ... -o ... -t ...
ENGINE --> PARSER
ENGINE --> CHART
ENGINE --> THEME
PARSER --> RENDERER
CHART --> RENDERER
THEME --> RENDERER
RENDERER --> User : output.pptx
@enduml