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ai-coding-workflow-labs/cowork-complete-guide/lessons/08-document-creation.md
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tiennm99 3336f04dff feat(content): add course lessons, scenarios, and start guide
Adds the full initial course content including:
- START-HERE.md with navigation and teaching instructions
- 12 lesson scripts covering delegation, frameworks, research, automation, and more
- Scenario files for customer-feedback, done-framework, file-chaos, first-task,
  large-corpus, receipts, and strategy-notes exercises
2026-03-08 21:09:46 +07:00

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Lesson 8: Document Creation (Excel, PowerPoint, Word)

This is where Cowork differs from regular Claude.

When you ask me to create a spreadsheet, you get a real .xlsx file. With working formulas. Multiple sheets. Charts.

Not a table I ask you to copy-paste. An actual file.

Same for PowerPoint, Word docs, PDFs.

WAIT: Ready to see this?

USER: Yes


Here's a classic use case that blew people's minds in demos:

Someone dumped credit card statements into Cowork. Got back an Excel spreadsheet with all subscriptions, which ones to cancel, and HOW to cancel each one.

Let's do something similar.

ACTION: Show the receipt images/PDFs in scenarios/receipts/

These are receipts. Different formats, some are photos, some are PDFs.

WAIT: What columns would YOU want in an expense tracker?

USER: [Lists columns date, vendor, amount, category, etc.]

Good. Let me build that.


ACTION: Read all receipt files (including images)

ACTION: Create expense-tracker.xlsx with:

  • Data sheet with the columns they specified
  • Formulas for totals by category
  • Conditional formatting for large expenses
  • Summary sheet with charts
  • Flagged items sheet for unclear receipts

Done. Download expense-tracker.xlsx and open it.

WAIT: Does it have working formulas? Check the totals.

USER: [Response]


Things I handle well in Excel:

  • SUM, AVERAGE, VLOOKUP, IF formulas
  • Conditional formatting
  • Multiple sheets
  • Charts and graphs
  • Data validation

This is real Excel. Edit it, share it, build on it.

WAIT: Ready for presentations?

USER: Yes


ACTION: Show the scattered notes in scenarios/strategy-notes/

These are messy strategy notes. Good ideas, no structure.

Your job: turn this into a presentation for executives.

WAIT: Who's the audience and what's the goal?

USER: [Audience and goal]


ACTION: Read all strategy notes

ACTION: Create strategy-presentation.pptx with:

  • Title slide
  • Executive summary
  • Key strategic pillars
  • Supporting data/evidence
  • Risks and mitigations
  • Recommendations
  • Next steps

Done. Download and open strategy-presentation.pptx.

WAIT: Real slides with layouts?

USER: [Response]


Things I handle well in PowerPoint:

  • Actual slide layouts (not just bullet points)
  • Multiple slides with logical flow
  • Basic formatting and structure
  • Speaker notes

It's a real .pptx edit it in PowerPoint, add images, refine design.

WAIT: Ready to systematize this?

USER: Yes


Let's create a skill for document creation.

WAIT: Any specific preferences? Brand voice? Formatting standards? Default structures?

USER: [Preferences or "keep it standard"]


ACTION: Create skills/document-creator.md with:

  • Voice/tone preferences
  • Default structures for different document types
  • Formatting standards
  • When to use Excel vs. Word vs. PowerPoint

Your Document Creator skill is ready.

WAIT: Three skills now. You've got a real system.

USER: Yes


What you learned: Real file creation Excel with formulas, PowerPoint with slides.

What you built: Document Creator skill with your preferences.

Key insight: These are actual files you can edit and share. Not text to copy-paste.

Next up: Browser automation reaching beyond your local files.

To continue: Start a fresh Cowork session and say: "Read START-HERE.md and start lesson 9"