# <!-- Powered by BMAD™ Core -->
---
template:
  id: exercise-set
  name: Exercise Set
  version: 1.0
  description: Structured practice exercises with progressive difficulty, hints, and solution approaches
  output:
    format: markdown
    filename: "exercises-{{chapter_number}}.md"

workflow:
  elicitation: false
  allow_skip: false
sections:
  - id: metadata
    title: Exercise Set Metadata
    instruction: |
      Exercise set information:
      - Chapter number and title
      - Overall difficulty range (e.g., "Beginner to Intermediate")
      - Total estimated completion time
      - Number of exercises (typically 4-6)
      - Learning objectives assessed
  - id: prerequisites
    title: Prerequisites and Setup
    instruction: |
      Required before starting exercises:
      - Chapter sections that must be read
      - Code setup or environment needed
      - Files or resources to download
      - Starter code repository (if applicable)

      Example:
      "Complete Chapter 3 Sections 1-4. Clone starter code: `git clone https://github.com/book/chapter-03-exercises`"
  - id: exercises
    title: Exercises
    instruction: |
      Create 4-6 exercises with progressive difficulty:

      **For Each Exercise, Include:**

      **Exercise Header:**
      - Exercise number and title
      - Difficulty: ⭐ (Basic), ⭐⭐ (Intermediate), ⭐⭐⭐ (Advanced)
      - Estimated time
      - Learning objective addressed

      **Problem Description:**
      - Clear statement of what to build/solve
      - Specific requirements (numbered list)
      - Input/output examples
      - Success criteria

      **Hints Section:**
      - 2-4 progressive hints (start general, get more specific)
      - Hints reveal approach, not complete solution
      - Example: "Hint 1: Consider using a dictionary to track counts"

      **Solution Approach:**
      - High-level algorithm or strategy
      - Key concepts to apply
      - Common pitfalls to avoid
      - Not full code solution (encourages independent work)

      **Extension (optional for advanced exercises):**
      - Ways to enhance the solution
      - Additional challenges to try

      ---
      **EXERCISE FORMAT EXAMPLE:**

      ### Exercise 1: User Input Validation ⭐
      **Estimated Time:** 15 minutes
      **Learning Objective:** Apply regex patterns for input validation

      **Problem:**
      Create a function `validate_email(email: str) -> bool` that validates email addresses according to these rules:
      1. Must contain exactly one @ symbol
      2. Local part (before @) must be 1-64 characters
      3. Domain part must contain at least one period
      4. Domain must end with 2-6 letter TLD

      **Test Cases:**
      ```python
      validate_email("user@example.com")  # True
      validate_email("invalid.email")     # False
      validate_email("no@domain")         # False
      ```

      **Hints:**
      1. Consider using Python's `re` module for regex matching
      2. Break the problem into parts: check @, then validate each side
      3. The pattern `^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,6}$` covers most cases

      **Solution Approach:**
      - Import `re` module
      - Define regex pattern matching email format
      - Use `re.match()` or `re.fullmatch()` to test the input
      - Return True if match found, False otherwise

      **Common Pitfalls:**
      - Forgetting to anchor regex with ^ and $
      - Not escaping special regex characters like `.`
      - Accepting emails with multiple @ symbols

      ---

      **Difficulty Progression:**
      - Exercises 1-2: Basic (⭐) - Direct application of chapter concepts
      - Exercises 3-4: Intermediate (⭐⭐) - Combine multiple concepts
      - Exercise 5: Advanced (⭐⭐⭐) - Creative problem-solving, minimal guidance
  - id: self_assessment
    title: Self-Assessment Checklist
    instruction: |
      Students verify their learning:

      **After completing all exercises, you should be able to:**
      - [ ] Skill 1 demonstrated in exercises
      - [ ] Skill 2 demonstrated in exercises
      - [ ] Skill 3 demonstrated in exercises
      - [ ] Concept 1 applied independently
      - [ ] Concept 2 combined with other concepts

      If you struggled with any exercises, review:
      - Exercise 1-2 issues → Review Section 3.1 (topic reference)
      - Exercise 3-4 issues → Review Section 3.3 (topic reference)
      - Exercise 5 issues → Consider reviewing entire chapter

      This helps students identify knowledge gaps.
  - id: solutions_note
    title: Solutions Note
    instruction: |
      How to access full solutions:
      - Solutions location (e.g., "Appendix A", "GitHub repository /solutions folder")
      - When to consult solutions (after attempting, not before)
      - Multiple solution approaches may exist

      Example:
      "Full solution code is available in the `solutions/chapter-03/` directory. Try solving independently first, then compare your approach. Remember: different solutions can be equally valid!"
  - id: extensions
    title: Extension Challenges
    instruction: |
      Optional advanced challenges for deeper learning:

      **Challenge 1:** [Title]
      - Description of more complex problem
      - Builds on exercise concepts
      - Estimated time: [duration]
      - No hints provided (fully independent)

      **Challenge 2:** [Title]
      - Another advanced application
      - May combine topics from multiple chapters

      These are for students who want extra practice or deeper mastery.