Typf Project Improvement Task List

This document outlines a comprehensive, actionable plan to improve the quality of the Typf text rendering engine. Tasks are prioritized by impact and feasibility.

Priority Legend

🔴 Critical - High impact, low effort, potential security/stability issues
🟡 High - High impact, moderate effort, significant quality improvements
🟢 Medium - Medium impact, moderate effort, code quality improvements
🔵 Low - Low impact, various effort, nice-to-have enhancements

Phase 1: Critical Code Quality & Security (Weeks 1-2)

Task 1.1: Reduce unwrap() in Production Code

Priority: 🔴 Critical
Module: typf-render-color, typf-render-opixa
Estimated Effort: 2-3 hours

Description: Replace unwrap() calls in production code paths with proper error handling to prevent potential panics in production environments.

Files to Modify:

backends/typf-render-color/src/bitmap.rs - 4 instances
backends/typf-render-opixa/src/edge.rs - 20+ instances

Subtasks:

Audit each unwrap() call in bitmap.rs to understand preconditions
Replace with .ok_or(RenderError::InvalidDimensions)? pattern
Add unit tests validating error paths
Audit edge.rs unwrap calls - determine if validation guarantees safety
If safe, add // SAFETY: comments explaining invariants
If not safe, replace with proper error handling
Run full test suite to verify no regressions

Acceptance Criteria:

Zero unwrap() calls in production code (excluding test modules)
All error paths covered by tests
Clippy unwrap_used = "deny" passes in production code

Task 1.2: Add Workspace-Wide Clippy Configuration

Priority: 🔴 Critical
Module: Root workspace
Estimated Effort: 1 hour

Description: Create workspace-level clippy configuration to enforce consistent linting across all crates.

Subtasks:

Create clippy.toml at workspace root:

# Workspace-wide Clippy configuration
warn-on-all-wildcard-imports = true
unwrap-used = "deny"
expect-used = "warn"
panic = "warn"

Run cargo clippy --workspace -- -D warnings
Fix any warnings that appear
Add #![allow(...)] comments where needed with justification
Document clippy configuration in CONTRIBUTING.md

Files to Create:

/clippy.toml - Workspace clippy configuration

Files to Modify:

/CONTRIBUTING.md - Add clippy documentation

Acceptance Criteria:

Workspace clippy passes with zero warnings
All crates inherit workspace configuration
CI enforces clippy checks

Task 1.3: Improve Test Code Error Handling

Priority: 🟡 High
Module: typf-shape-hb
Estimated Effort: 2-3 hours

Description: Even test code should handle errors gracefully to catch actual issues early.

Subtasks:

Review 30+ unwrap() calls in typf-shape-hb/src/lib.rs test module
Replace critical test assertions with .expect("message") for context
Keep unwrap() for truly invariant conditions with // SAFETY: comments
Ensure all test failures provide meaningful error messages

Files to Modify:

backends/typf-shape-hb/src/lib.rs

Acceptance Criteria:

Test failures provide actionable error messages
Critical test paths have descriptive assertions
Test code maintains explicit #![allow(clippy::unwrap_used)] with justification

Phase 2: Modularization & Code Deduplication (Weeks 3-4)

Task 2.1: Extract Shared Path Building Utilities

Priority: 🟡 High
Module: typf-render-skia, typf-render-zeno
Estimated Effort: 4-6 hours

Description: Create a shared crate for common path building and bbox operations used across multiple renderers.

Subtasks:

Create new crate: backends/typf-render-path-utils
Extract PathPen implementation from Skia renderer
Extract ZenoPathBuilder from Zeno renderer
Create shared bbox calculation utilities
Migrate Skia and Zeno to use shared utilities
Add comprehensive tests for shared utilities
Update workspace Cargo.toml to include new crate

Files to Create:

backends/typf-render-path-utils/Cargo.toml
backends/typf-render-path-utils/src/lib.rs
backends/typf-render-path-utils/src/path_pen.rs
backends/typf-render-path-utils/src/bbox.rs
backends/typf-render-path-utils/tests/integration.rs

Files to Modify:

backends/typf-render-skia/src/lib.rs
backends/typf-render-zeno/src/lib.rs
/Cargo.toml (workspace members)

Acceptance Criteria:

Skia and Zeno renderers use shared utilities
No duplicate path building code
Shared utilities have 100% test coverage
All tests pass

Task 2.2: Define Magic Numbers as Constants

Priority: 🟢 Medium
Module: Multiple renderers
Estimated Effort: 1-2 hours

Description: Replace magic numbers (e.g., 0.5 for color padding) with named constants for clarity and maintainability.

Subtasks:

Identify all magic numbers in renderers:
- Color padding factor (0.5)
- Default cache timeouts
- Bitmap scaling factors
- Other hardcoded values
Create constants module in each affected crate
Replace magic numbers with named constants
Add documentation explaining why each value was chosen
Verify all tests still pass

Files to Modify:

backends/typf-render-skia/src/lib.rs
backends/typf-render-zeno/src/lib.rs
backends/typf-render-opixa/src/lib.rs
backends/typf-render-color/src/lib.rs

Acceptance Criteria:

Zero magic numbers in hot paths
All constants have documentation
Test suite passes

Task 2.3: Refactor Large Functions

Priority: 🟢 Medium
Module: typf-render-skia, typf-render-zeno
Estimated Effort: 6-8 hours

Description: Extract large rendering functions into smaller, more focused methods for better readability and testability.

Subtasks:

Identify SkiaRenderer::render() helper methods:
- Color glyph rendering
- Outline rendering
- Canvas composition
- Bbox calculation
Extract each into its own private method
Add [inline] attribute to hot paths if performance is critical
Repeat for ZenoRenderer::render_glyph()
Add unit tests for extracted methods
Benchmark before and after to ensure no regression

Files to Modify:

backends/typf-render-skia/src/lib.rs
backends/typf-render-zeno/src/lib.rs

Acceptance Criteria:

No method exceeds 100 lines
Each method has a single responsibility
All new methods are tested
Performance unchanged (±2%)

Phase 3: Testing Improvements (Weeks 5-6)

Task 3.1: Add Stress Tests for Large Inputs

Priority: 🟡 High
Module: Test suite
Estimated Effort: 4-6 hours

Description: Add stress tests for edge cases involving large fonts and glyph counts to verify security limits work correctly.

Subtasks:

Create core/tests/stress_tests.rs
Test font size limit enforcement:
- Attempt to load 101KB fonts
- Verify rejected with SizeExceeded error
Test glyph count limits:
- Shape text with >10M glyphs
- Verify rejected or handled gracefully
Test bitmap dimension limits:
- Attempt to render 17K wide bitmaps
- Verify rejected with DimensionsTooLarge error
Add benchmark tests for large legitimate inputs:
- 50KB fonts
- 1000-glyph strings
- Measure performance
Ensure stress tests can be skipped in CI if needed

Files to Create:

core/tests/stress_tests.rs

Files to Modify:

core/Cargo.toml (add test dependencies)

Acceptance Criteria:

All security limits validated
Stress tests pass consistently
Benchmarks provide baseline metrics
Tests can be skipped with --skip stress flag

Task 3.2: Add Concurrent Access Tests

Priority: 🟡 High
Module: Test suite
Estimated Effort: 3-4 hours

Description: Verify thread safety by testing concurrent access to caching and rendering operations.

Subtasks:

Create core/tests/concurrent_tests.rs
Test concurrent shaping from multiple threads:
- Spawn 8 threads, all shaping different text
- Verify no data races or panics
- Validate cache consistency
Test concurrent rendering:
- Spawn 4 threads rendering in parallel
- Verify output consistency
Test cache hit/miss under load:
- Measure cache hit rate under load
- Verify no corruption
Add thread sanitizer to CI if not present

Files to Create:

core/tests/concurrent_tests.rs

Files to Modify:

.github/workflows/test.yml (add tsan variant)

Acceptance Criteria:

All concurrent tests pass regularly
Thread sanitizer shows zero data races
Cache remains consistent under load

Task 3.3: Expand Color Glyph Test Coverage

Priority: 🟡 High
Module: typf-render-color
Estimated Effort: 4-5 hours

Description: Comprehensive testing for COLR, SVG, and bitmap color glyph rendering.

Subtasks:

Create test fonts with various color glyph formats:
- COLR v0/v1 layers
- SVG glyphs
- CBDT/sbix bitmaps
- Mixed color + outline fonts
Add tests for color palette application:
- Default palette
- Custom palettes
- Invalid palette indices
Test color glyph source preference:
- COLR vs SVG fallback
- Outline fallback when color unavailable
- Preference ordering correctness
Test edge cases:
- Fully transparent color glyphs
- Empty color glyphs
- Corrupted color tables
Add visual regression tests:
- Compare output against reference images
- Verify exact pixel matches

Files to Create:

backends/typf-render-color/tests/color_glyphs.rs
test-fonts/color-glyphs/ (test fixtures)

Acceptance Criteria:

All color glyph formats tested
Color palettes correctly applied
Fallback behavior verified
Visual regression tests pass

Task 3.4: Add Fuzzing Integration

Priority: 🟢 Medium
Module: fuzz/
Estimated Effort: 6-8 hours

Description: Integrate libFuzzer to automatically find edge cases and security vulnerabilities.

Subtasks:

Set up fuzzing infrastructure:
- Ensure cargo-fuzz installed
- Validate fuzz/ directory structure
Create fuzzer for font parsing:
- Target: typf_input::load_font()
- Corpus: Build from valid font files
- Dictionary: Add common font table tags
Create fuzzer for shaping:
- Target: shaper implementations
- Corpus: Unicode text samples
Create fuzzer for rendering:
- Target: renderer implementations
- Corpus: Valid font + text combinations
Add fuzzing to CI:
- Nightly fuzz runs
- Timeout limits (10-30s per fuzzer)
- Coverage reporting
Document fuzzer setup in CONTRIBUTING.md

Files to Create:

fuzz/fuzz_targets/font_parsing.rs
fuzz/fuzz_targets/shaping.rs
fuzz/fuzz_targets/rendering.rs

Files to Modify:

fuzz/Cargo.toml
.github/workflows/fuzz.yml (new workflow)
CONTRIBUTING.md

Acceptance Criteria:

Fuzzers run without crashes
Coverage >70% on targeted code
No security issues found after 24h runtime

Phase 4: Documentation & Developer Experience (Weeks 7-8)

Task 4.1: Add Architecture Diagrams

Priority: 🟢 Medium
Module: Documentation
Estimated Effort: 3-4 hours

Description: Create visual documentation explaining the pipeline architecture and component relationships.

Subtasks:

Create pipeline architecture diagram:
- Six-stage rendering pipeline
- Data flow between stages
- Backend selection points
Create component diagram:
- Core crates and their relationships
- Backend crate hierarchy
- External dependencies
Create trait system diagram:
- Core traits and implementations
- Trait object usage
- Backend integration patterns
Add diagrams to README.md and ARCHITECTURE.md
Ensure diagrams render correctly in GitHub README

Files to Create:

docs/architecture.png (pipeline diagram)
docs/components.png (component diagram)
docs/traits.png (trait system diagram)
ARCHITECTURE.md (detailed architecture documentation)

Files to Modify:

README.md (embed architecture diagram)

Acceptance Criteria:

Clear, professional diagrams
Diagrams explain current architecture
New developers can understand system quickly

Task 4.2: Document Pipeline Stages in Detail

Priority: 🟢 Medium
Module: Documentation
Estimated Effort: 4-5 hours

Description: Create comprehensive documentation for each stage of the rendering pipeline.

Subtasks:

Document Stage 1 (Input & Font Loading):
- Supported font formats
- Validation logic
- Security considerations
Document Stage 2 (Unicode Processing):
- Normalization algorithms
- Script detection
- Bidi resolution
Document Stage 3 (Shaping):
- Backend comparison
- When to use each backend
- Performance characteristics
Document Stage 4 (Rendering):
- Backend comparison matrix
- Quality vs speed tradeoffs
- Color glyph support
Document Stage 5 (Composition):
- Blending algorithms
- Color space handling
Document Stage 6 (Export):
- Supported formats
- Format-specific considerations
Add code examples for each stage
Include troubleshooting section

Files to Create:

docs/pipeline-stages.md (comprehensive pipeline documentation)

Files to Modify:

README.md (link to detailed docs)

Acceptance Criteria:

Each stage thoroughly documented
Code examples included
Troubleshooting guide helpful

Task 4.3: Add Real-World Usage Examples

Priority: 🔵 Low
Module: Documentation & Examples
Estimated Effort: 4-6 hours

Description: Create practical examples demonstrating common use cases.

Subtasks:

Create examples/ directory:
- basic_rendering/ - Simple text to PNG
- multi_script/ - Mixed Latin/Arabic/Chinese
- color_glyphs/ - Emoji and COLR fonts
- webgl_integration/ - Vello GPU rendering
- custom_export/ - Custom export format
Document each example:
- What it does
- When to use it
- Key concepts demonstrated
Ensure all examples compile and run
Add example output images
Link from README.md

Files to Create:

examples/basic_rendering/Cargo.toml
examples/basic_rendering/src/main.rs
examples/multi_script/...
examples/color_glyphs/...
examples/webgl_integration/...
examples/custom_export/...

Files to Modify:

README.md (add examples section)
/Cargo.toml (add workspace members)

Acceptance Criteria:

5+ working examples
Each example documented
Examples demonstrate key features
README links to examples

Phase 5: Performance & Observability (Weeks 9-10)

Task 5.1: Add Cache Hit Rate Instrumentation

Priority: 🟢 Medium
Module: typf-core, backends
Estimated Effort: 3-4 hours

Description: Add metrics to track cache effectiveness and guide optimization efforts.

Subtasks:

Add instrumentation to core/src/cache.rs:
- Track cache hits/misses
- Track eviction counts
- Track total bytes stored
Expose metrics via trait methods:
- Shaper::cache_stats() - hit rate, size, evictions
- Renderer::cache_stats() - same for rendering cache
Add logging for cache events:
- Hit/miss at debug level
- Eviction at trace level
Create example showing cache statistics
Document metrics in API docs

Files to Modify:

core/src/cache.rs
core/src/traits.rs (add cache_stats methods)
Example files

Acceptance Criteria:

Cache statistics available via API
Logs provide actionable insight
Documentation explains metrics

Task 5.2: Systematic Backend Benchmarking

Priority: 🟢 Medium
Module: typf-bench
Estimated Effort: 6-8 hours

Description: Create comprehensive benchmark suite comparing all backends across various workloads.

Subtasks:

Expand typf-bench crate:
- Benchmark text rendering at various sizes (12pt, 24pt, 48pt)
- Benchmark different scripts (Latin, Arabic, CJK)
- Benchmark pure vs color glyphs
- Throughput tests (glyphs/second)
- Latency tests (time per glyph)
Benchmark memory usage:
- Peak memory per 1000 glyphs
- Cache memory footprint
- Memory per operation
Create benchmark matrix:
- 5 shapers × 7 renderers = 35 combinations
- Focus on most common pairings (10-15 combos)
Generate benchmark report:
- Performance comparison tables
- Recommendations by use case
- Tradeoff analysis
Integrate with CI:
- Weekly benchmark runs
- Alert on performance regressions >5%

Files to Modify:

tools/typf-bench/src/lib.rs
tools/typf-bench/benches/*.rs

Files to Create:

tools/typf-bench/benches/shaper_bench.rs
tools/typf-bench/benches/renderer_bench.rs
tools/typf-bench/benches/memory_bench.rs
BENCHMARKS.md (benchmark results and analysis)

Acceptance Criteria:

Comprehensive benchmark suite
Clear performance recommendations
CI tracks performance over time

Task 5.3: Memory Usage Profiling

Priority: 🔵 Low
Module: Profiling
Estimated Effort: 4-5 hours

Description: Profile memory usage patterns and identify optimization opportunities.

Subtasks:

Set up memory profiling tools:
- cargo valgrind for leak detection
- cargo-flamegraph for heap profiling
- Custom benchmarks with memory tracking
Profile key workflows:
- Loading 100 fonts
- Shaping 10K different texts
- Rendering 10K glyphs with cache
- Rendering 10K glyphs without cache
Identify memory hotspots:
- Font data duplication
- Unnecessary cloning
- Cache bloat
Implement fixes if issues found:
- Reduce copying
- Optimize cache size
- Free unused resources
Document memory characteristics:
- Baseline memory usage
- Per-glyph memory overhead
- Cache memory footprint

Files to Create:

docs/memory-profiling.md (findings and recommendations)

Acceptance Criteria:

No memory leaks detected
Memory usage documented
Optimization recommendations provided

Phase 6: Future API Enhancements (Optional, Week 11+)

Task 6.1: Async API Exploration

Priority: 🔵 Low
Module: API design
Estimated Effort: 8-12 hours

Description: Explore adding async API for future-proofing and non-blocking operations.

Subtasks:

Research async rendering patterns:
- What would benefit from async?
- How would cache integration work?
- Backpressure considerations

Design experimental async traits:

#[async_trait]
pub trait AsyncShaper {
    async fn shape_async(...) -> Result<ShapingResult>;
}

#[async_trait]
pub trait AsyncRenderer {
    async fn render_async(...) -> Result<RenderOutput>;
}

Implement prototype for one backend
Benchmark async vs sync overhead
Document findings and recommendations
Decide on async API adoption

Note: This is exploratory work. Adoption depends on findings.

Acceptance Criteria:

Async API design documented
Performance characteristics measured
Recommendation for/against adoption

Task 6.2: Builder Pattern for Complex Parameters

Priority: 🔵 Low
Module: API design
Estimated Effort: 4-6 hours

Description: Add builder pattern for complex parameter objects to improve ergonomics.

Subtasks:

Identify complex parameter types:
- RenderParams (10+ fields)
- ShapingParams (7+ fields)
- GlyphSourcePreference (configuration heavy)

Design builder for each:

RenderParams::builder()
    .foreground(Color::black())
    .background(Color::white())
    .antialias(true)
    .build()

Implement builders
Update examples to use builders
Keep old constructors for simple cases
Update documentation

Files to Modify:

core/src/types.rs (RenderParams, ShapingParams)
core/src/lib.rs (GlyphSourcePreference)
Examples

Acceptance Criteria:

Builders implemented for complex types
Examples updated
Backward compatibility maintained

Task 6.3: Improve Error Messages with Recovery Suggestions

Priority: 🔵 Low
Module: Error handling
Estimated Effort: 3-4 hours

Description: Enhance error types to provide actionable recovery suggestions.

Subtasks:

Review all error variants in TypfError hierarchy

Add help() method to errors:

impl RenderError {
    pub fn help(&self) -> Option<&'static str> {
        match self {
            RenderError::GlyphNotFound(id) => {
                Some("Check if the font supports the character or try a different font")
            },
            RenderError::DimensionsTooLarge { .. } => {
                Some("Reduce font size or enable scaling in render parameters")
            },
            _ => None,
        }
    }
}

Update error Display impls to include suggestions
Test error messages in examples
Document error recovery strategies

Files to Modify:

core/src/error.rs

Acceptance Criteria:

Helpful error messages for common errors
Recovery suggestions included
Documentation covers error handling

Phase 7: Platform & Ecosystem (Weeks 11-12)

Task 7.1: Complete Windows DirectWrite Backend

Priority: 🟢 Medium
Module: typf-os-win
Estimated Effort: 16-24 hours

Description: Complete the Windows DirectWrite one-pass renderer implementation.

Subtasks:

Assess current state of typf-os-win
Implement remaining DirectWrite integration:
- Font loading from system fonts
- Text shaping via DirectWrite
- Glyph rendering via Direct2D
Add Windows-specific tests
Test on Windows runners in CI
Document Windows-specific features
Update platform matrix in README

Files to Modify:

backends/typf-os-win/src/lib.rs
backends/typf-os-win/Cargo.toml

Files to Create:

backends/typf-os-win/tests/integration.rs

Acceptance Criteria:

Windows backend feature-complete
Tests pass on Windows
Documentation updated

Task 7.2: Improve WASM Support

Priority: 🔵 Low
Module: Platform support
Estimated Effort: 8-12 hours

Description: Enhance WebAssembly support for browser-based applications.

Subtasks:

Add wasm-bindgen bindings for common APIs
Optimize Zeno renderer for WASM:
- Remove dependencies unavailable in WASM
- Optimize bundle size
Create WASM example:
- Browser canvas rendering
- Interactive font selection
Document WASM limitations and workarounds
Add wasm32 target to CI
Test in major browsers (Chrome, Firefox, Safari)

Files to Create:

bindings/wasm/Cargo.toml
bindings/wasm/src/lib.rs
examples/wasm_demo/
.github/workflows/wasm.yml

Acceptance Criteria:

WASM bindings work
Demo runs in browsers
Build size <500KB compressed
Documentation includes WASM guide

Appendix: Testing Quality Checklist

Use this checklist to ensure comprehensive test coverage:

Unit Tests

All public functions have tests
Error paths tested
Edge cases covered (empty, max values, etc.)
Property-based tests for complex logic

Integration Tests

Full pipeline tested end-to-end
All backend combinations tested (sample)
Cross-language text tested (Latin, Arabic, CJK, etc.)
Bidi resolution tested
Normalization tested

Stress Tests

Security limits enforced
Large inputs handled gracefully
Memory limits enforced
Timeout behavior correct

Concurrent Tests

Thread safety verified
Cache consistency under load
No data races detected

Fuzzing

Font parsing fuzzer runs
Shaping fuzzer runs
Rendering fuzzer runs
No crashes after extended runtime

Performance Tests

Benchmarks exist for critical paths
Performance tracked over time
No regressions detected

Appendix: Code Review Checklist

Use this checklist during code reviews:

Safety

No unwrap() in production code
No panic!() in production code
Unsafe code documented with SAFETY comments
Error handling complete

Correctness

All error cases handled
Assertions are reasonable
No infinite loops
Resource cleanup correct

Performance

No unnecessary allocations
Cloning minimized
Appropriate data structures used
Hot paths profiled

Maintainability

Functions are focused and concise
Names are clear and descriptive
Comments explain why, not what
Magic numbers are named constants

Testing

Tests cover new functionality
Edge cases tested
Error paths tested
Tests are fast and reliable

Documentation

Public APIs documented
Complex algorithms explained
Examples provided
README updated if needed

Summary Statistics

Total Phases: 7
Total Tasks: 23
Estimated Total Effort: 120-160 hours (3-4 weeks for a full-time developer)

Priority Distribution:

🔴 Critical: 3 tasks (~8 hours)
🟡 High: 6 tasks (~30 hours)
🟢 Medium: 8 tasks (~50 hours)
🔵 Low: 6 tasks (~40 hours)

Focus Areas:

Code Quality & Safety (35% of effort)
Testing & Reliability (25% of effort)
Documentation & DX (20% of effort)
Performance & Observability (15% of effort)
Future Enhancements (5% of effort)

Implementation Strategy

Recommended Approach:

Phase 1 (Critical): Complete immediately - addresses safety and quality issues
Phase 2-3 (High Priority): Complete over 1-2 months - improves maintainability
Phase 4-5 (Medium): Complete as time permits - enhances developer experience
Phase 6-7 (Low): Consider based on project needs and roadmap

Parallelization Opportunities:

Tasks within phases can be worked in parallel
Different developers can take different phases
CI automation reduces testing burden

Success Metrics:

Zero production panics
Test coverage >80%
Clippy passes with zero warnings
Performance regression <2%
Documentation completeness >90%

This task list is a living document. Update it as priorities change, tasks are completed, or new requirements emerge.

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Typf Project Improvement Task List

Priority Legend

Phase 1: Critical Code Quality & Security (Weeks 1-2)

Task 1.1: Reduce unwrap() in Production Code

Task 1.2: Add Workspace-Wide Clippy Configuration

Task 1.3: Improve Test Code Error Handling

Phase 2: Modularization & Code Deduplication (Weeks 3-4)

Task 2.1: Extract Shared Path Building Utilities

Task 2.2: Define Magic Numbers as Constants

Task 2.3: Refactor Large Functions

Phase 3: Testing Improvements (Weeks 5-6)

Task 3.1: Add Stress Tests for Large Inputs

Task 3.2: Add Concurrent Access Tests

Task 3.3: Expand Color Glyph Test Coverage

Task 3.4: Add Fuzzing Integration

Phase 4: Documentation & Developer Experience (Weeks 7-8)

Task 4.1: Add Architecture Diagrams

Task 4.2: Document Pipeline Stages in Detail

Task 4.3: Add Real-World Usage Examples

Phase 5: Performance & Observability (Weeks 9-10)

Task 5.1: Add Cache Hit Rate Instrumentation

Task 5.2: Systematic Backend Benchmarking

Task 5.3: Memory Usage Profiling

Phase 6: Future API Enhancements (Optional, Week 11+)

Task 6.1: Async API Exploration

Task 6.2: Builder Pattern for Complex Parameters

Task 6.3: Improve Error Messages with Recovery Suggestions

Phase 7: Platform & Ecosystem (Weeks 11-12)

Task 7.1: Complete Windows DirectWrite Backend

Task 7.2: Improve WASM Support

Appendix: Testing Quality Checklist

Unit Tests

Integration Tests

Stress Tests

Concurrent Tests

Fuzzing

Performance Tests

Appendix: Code Review Checklist

Safety

Correctness

Performance

Maintainability

Testing

Documentation

Summary Statistics

Implementation Strategy