Pdf calendar extraction

Skill cxcscmu/SkillLearnBench/skills/b4-skill-creator-claude-haiku-4-5/schedule-planning/pdf-calendar-extraction

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npx -y skills add cxcscmu/SkillLearnBench --skill pdf-calendar-extraction

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Extract appointments and time blocks from a calendar PDF. This skill helps parse calendar.pdf to identify appointment blocks, their positions on the timeline, duration, and color coding (including blue blocks that represent flexible/overwritable slots). Use this whenever you need to extract calendar data from a PDF document.

SKILL.md

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PDF Calendar Extraction

Overview

This skill extracts appointment information from a calendar PDF by analyzing:

Appointment block positions and dimensions
Time slots based on 15-minute intervals between horizontal lines
Color coding (blue = flexible/overwritable, other colors = fixed appointments)
Start and end times calculated from vertical position relative to timeline

Extracting Calendar Data from PDF

Step 1: Read the PDF

Use the Read tool to load the calendar PDF:

Read /root/calendar.pdf

The PDF will display as a visual image in the interface.

Step 2: Identify the Timeline Structure

Look for:

Vertical timeline axis (usually on the left side) showing hours or time markers
Horizontal grid lines dividing the calendar into 15-minute intervals
Time labels indicating the start hour(s) of the day

Example: If you see "9:00 AM" label and horizontal lines below it, each line represents 15 minutes.

Step 3: Locate and Measure Appointment Blocks

For each visible appointment block:

Identify the block: Rectangular areas representing appointments
Determine color: Note if the block is blue (flexible) or another color (fixed)
Measure vertical position:
- Identify which horizontal lines the block spans
- Count lines from the start time to get duration
- Each line = 15 minutes
Calculate times:
- Start time = position from top of timeline
- End time = start time + (number of 15-minute intervals)

Step 4: Record Appointment Data

Create a structured list of appointments:

{
  "timezone": "[Extracted from PDF if visible]",
  "appointments": [
    {
      "name": "Appointment Name",
      "start_time": "HH:MM",
      "end_time": "HH:MM",
      "duration_minutes": 30,
      "color": "blue|other",
      "flexible": true|false
    }
  ]
}

Color Coding Rules

Blue blocks: Flexible or low-priority tasks that can be overwritten by meeting requests
Other colors (gray, black, etc.): Fixed appointments that cannot be moved
When a meeting request overlaps with a blue block, treat it as available time and schedule the meeting

Tips for Accurate Extraction

If the PDF shows a full day view, identify the start and end hours clearly
Double-check time calculations by counting 15-minute intervals
Note any timezone information displayed on the calendar
If blocks are adjacent with no gap, verify they are separate appointments vs. one longer block

Output Format

Return extracted data as a structured list suitable for the meeting slot finder algorithm to process.