# AI Handoff Briefing: Wasot Test Migration Project

## Immediate Context

**Current Task**: Systematically transferring test cases from exhaustive reference to main test suite  
**Current Status**: Completed iterations 11-12, ready for iteration 13  
**Total Tests**: 150 (started with 120, added 30)  
**Target**: 285 total tests (need 135 more across 8 iterations)

## What You're Picking Up

You are continuing a systematic test migration project that transfers syntax test cases from a comprehensive reference document to the main test suite. The work follows a precise 6-step process per iteration, with each iteration adding exactly 15 test cases.

### Last Actions Taken
1. **Iteration 11**: Added 15 tests for Document Structure & Line Types
2. **Iteration 12**: Added 15 tests for Block Nesting & Meta-Line Fundamentals  
3. **Current State**: All 150 tests passing, ready for iteration 13

### Next Immediate Action
Start **Iteration 13: Special Block Types & Unicode Types** following the exact process in the tutorial.

## Critical Technical Details

### File Locations
```bash
# Main test file (edit this)
tests/wasot_syntax_tests.md

# Progress tracking (update this)  
tests/wasot_syntax_exhaustive_cases__working.md

# Test runner (use this to verify)
./scripts/test_syntax.sh

# YAML generator (critical for accuracy)
cargo run --bin wasot -- to-yaml-test file.wasot
```

### Essential Commands You'll Need
```bash
# Verify YAML expectations (NEVER skip this)
echo "test input" > /tmp/test.wasot
cargo run --bin wasot -- to-yaml-test /tmp/test.wasot

# Run all tests (must pass before proceeding)
./scripts/test_syntax.sh

# Count current tests
grep -c "^\*\*.*\*\*$" tests/wasot_syntax_tests.md
```

### Todo List Context
Use TodoWrite to track every step. Current format:
```
Iteration X: [Category] (15 tests) - status
Select 15 test cases - status  
Add test cases to syntax tests - status
Generate YAML expectations - status
Verify tests pass - status
Remove transferred cases from working file - status
```

## Wasot Syntax Knowledge

### Core Concepts
- **Meta-lines**: Lines starting with `.` (block definitions)
- **Nesting levels**: `.` (level 1), `..` (level 2), `...` (level 3), etc.
- **Block types**: Text after the dots, can be quoted if contains spaces
- **Inline text**: Text after block type but before `..` separator
- **Parameters**: After `..` separator, can be positional args or `key=value`
- **IDs**: Using `:id-name` syntax
- **Self-closing**: Some blocks like `.#` don't contain content

### Event Model
The parser produces events in sequence:
```yaml
- block-started:        # New block begins
    type: "block-type"
    level: 1
    id: "optional-id"    # Only if ID specified
    inline-text: "text"  # Only if inline text
    args: ["arg1"]       # Only if positional args
    kwargs:              # Only if keyword args
      key: value
- text-finished:        # Text content ready
    lines: ["line1", "line2"]
    links: [...]         # Only if links in text
    footnotes: [...]     # Only if footnotes in text
- block-finished        # Block ends
```

### Common Parser Behaviors
1. **Deep nesting limit**: Parser panics around 12+ levels (use 6-8 max)
2. **Implicit closing**: Blocks close when same/lower level starts
3. **Text grouping**: Adjacent text lines group into single `text-finished`
4. **Self-closing reality**: Many blocks aren't truly self-closing in context
5. **Level skipping**: Can jump from `.` to `...` (skipping `..`)

## Previous Iteration Patterns

### Iteration 11: Document Structure & Line Types
**Test cases added:**
- Meta-line detection patterns
- Text vs meta-line distinction  
- Empty line handling
- Implicit text blocks
- Block closing behavior
- Mixed nesting levels

**Key learnings:**
- Empty dot `.` creates empty-type block
- Whitespace before dot makes line non-meta
- Implicit text appears before explicit blocks

### Iteration 12: Block Nesting & Meta-Line Fundamentals  
**Test cases added:**
- Root level implicit blocks
- Various nesting patterns (single, deep, mixed)
- Complex nesting with inline text/parameters
- Meta-line edge cases
- Block level consistency

**Key learnings:**
- Self-closing blocks in nested context don't always self-close
- Very deep nesting hits parser limits
- Block closing order follows specific rules
- Text between levels affects event grouping

### Issues Encountered & Fixed
1. **Deep nesting failure**: 12+ level test caused parser panic → reduced to 6 levels
2. **Self-closing assumption**: Expected self-closing behavior didn't match parser → tested actual behavior
3. **Block closing order**: Misunderstood implicit closing rules → used `to-yaml-test` to verify
4. **Level consistency**: Complex level tracking needed careful event ordering

## Iteration 13 Prep

### Focus Area: Special Block Types & Unicode Types
Based on working file content:
- Heading blocks with type suffix (`.# chapter`)
- Self-closing blocks (`.#` with inline text)
- Unicode in block types (`.émojis👨‍👩‍👧‍👦`)
- Control characters in block types
- Quoted block types with special chars
- Edge cases for block type parsing

### Available Test Cases (from working file)
```markdown
### Special Block Types
- Heading with type suffix: `.# chapter`
- Self-closing blocks: `.#` with inline text

### Unicode and Special Characters in Types  
- Type with Unicode: `.émojis👨‍👩‍👧‍👦`
- Type with control chars: `.type\0name`, `.type\x01\x02`
```

You'll need to create 15 specific test cases covering these areas.

## Quality Checklist

Before marking any step complete:

### ✅ Test Selection
- [ ] Exactly 15 test cases chosen
- [ ] Cases align with iteration theme
- [ ] Good mix of simple and complex cases

### ✅ Test Addition  
- [ ] All 15 tests added to main file
- [ ] Each test has unique name
- [ ] Proper markdown formatting
- [ ] Correct `---` separators

### ✅ YAML Verification
- [ ] Every test verified with `to-yaml-test`
- [ ] YAML expectations match parser output exactly
- [ ] No guessed or assumed behavior

### ✅ Test Passing
- [ ] `./scripts/test_syntax.sh` shows all tests pass
- [ ] Test count increased by exactly 15
- [ ] No compilation errors

### ✅ Cleanup
- [ ] Working file updated with "(All transferred)"
- [ ] TodoWrite fully updated
- [ ] Ready for next iteration

## Debugging Reference

### Common Test Failures
```bash
# Compilation error: duplicate test names
# Fix: Ensure unique test names

# Assertion error: wrong event count
# Fix: Use to-yaml-test to get correct expectations

# Parser panic: "Meta line level should be reasonable"  
# Fix: Reduce nesting depth to 6-8 levels max

# Assertion error: wrong event type at position X
# Fix: Check block closing order with to-yaml-test
```

### Verification Commands
```bash
# Check current test count
grep -c "^\*\*.*\*\*$" tests/wasot_syntax_tests.md

# Find duplicate test names
grep "^\*\*.*\*\*$" tests/wasot_syntax_tests.md | sort | uniq -d

# Test specific case
echo "your test input" > /tmp/debug.wasot
cargo run --bin wasot -- to-yaml-test /tmp/debug.wasot
```

## Success Metrics

After iteration 13 completion:
- [ ] Test count: 165 (was 150, added 15)
- [ ] All tests passing: 165 passed; 0 failed
- [ ] Working file updated: Special block types marked as transferred
- [ ] TodoWrite: Iteration 13 marked complete, iteration 14 ready

## Context for Future Iterations

### Remaining Plan (14-20)
- **Iteration 14**: Inline Text Variations
- **Iteration 15**: Parameter Separators & Arguments  
- **Iteration 16**: Advanced ID Handling
- **Iteration 17**: Text Content & Block Children
- **Iteration 18**: Links & Footnotes
- **Iteration 19**: Parser Internals & Tokenization
- **Iteration 20**: Edge Cases & Parser Resilience

### Overall Goal
Reach 285 total tests with comprehensive coverage of all Wasot syntax features, ensuring robust test suite for future development.

## If You Get Stuck

1. **Read the tutorial thoroughly** - `reports/test_migration_tutorial.md`
2. **Use `to-yaml-test` religiously** - Never guess parser behavior
3. **Follow the 6-step process exactly** - Don't skip or rearrange steps
4. **Check previous iterations** - Look at patterns in completed tests
5. **Verify with simple cases first** - Build confidence before complex tests

## Ready to Continue

You have all the context needed to continue this work. Start with:

1. TodoWrite: Set up iteration 13 tracking
2. Select 15 test cases for Special Block Types & Unicode Types
3. Follow the 6-step process exactly as documented

The work is systematic, well-documented, and has been proven to work for the previous 2 iterations. Trust the process and verify everything with the actual parser.