When a user says "change the executive summary," the system:

1. AI identifies the target: Determines if user wants entire text box or single element
2. AI generates markdown: Creates clean bullet points like • First point\n• Second point
3. System parses markdown: Identifies bullets, sub-bullets, plain text
4. System generates XML: Converts to proper PowerPoint structure with bullet formatting
5. System replaces content: Swaps entire text box content while preserving structure

User: "Change the executive summary"
→ AI: Text box replacement (entire content section)
→ Response: textBoxId: "TB1", slideNumber: 2

User: "Change the executive summary title" 
→ AI: Single element replacement
→ Response: elementId: "2A"

User: "Use this template to make a deck about tortoises"
→ AI: Template detected (placeholder content like "Front cover template")
→ Response: action: "multi-slide" (replace all template content)

The AI automatically detects template files by looking for placeholder content:

• "Front cover template"
• "Test description"
• "Executive Summary" with generic content
• Other template-like placeholder text

When templates are detected, the AI defaults to multi-slide operations that replace all placeholder content with coordinated, themed content. This matches user intent - templates are meant to be completely transformed, not just have content added.

AI generates content in simple markdown:

• Main bullet point
• Another main point
  • Sub-bullet (indented)
• Final main point

System converts markdown to PowerPoint XML by generating only the inner content:

<!-- Generated inner content (no <p:txBody> wrapper) -->
<a:bodyPr spcFirstLastPara="1" wrap="square" lIns="0" tIns="0" rIns="0" bIns="0" anchor="t" anchorCtr="0">
  <a:noAutofit/>
</a:bodyPr>
<a:lstStyle/>
<a:p>
  <a:pPr marL="182880" lvl="0" indent="-173990" algn="l" rtl="0">
    <a:buChar char="•"/>
  </a:pPr>
  <a:t>Main bullet point</a:t>
</a:p>

The system then replaces the content between existing <p:txBody> tags to avoid XML structure corruption.

Text Box Replacement (entire content):

• User says: "change executive summary", "replace all bullets"
• AI returns: textBoxId + slideNumber
• System replaces: Entire <p:txBody> content

Element Replacement (single item):

• User says: "change title", "replace first bullet"
• AI returns: elementId
• System replaces: Single <a:t> tag

• Only handles body text boxes (bullets) for full replacement
• Sub-bullet indentation is simplified
• No support for complex formatting (bold, italic, etc.)
• Text box identification relies on placeholder type matching

Content duplication: Check if AI returned elementIds array instead of textBoxId Missing bullets: Verify markdown parsing found bullet markers (•, -, *) Wrong text box: Check if text box regex pattern matches the slide structure XML corruption: Ensure generated content doesn't include <p:txBody> wrapper tags PowerPoint repair needed: Usually indicates nested XML tags or missing required attributes