Overview
Create comprehensive documentation for the new four-layer safety architecture, including user guides, migration documentation, and qualification evidence templates.
Parent Issue: #101
Depends on: #102, #103, #104
Documentation Scope
1. Architecture Documentation
System Architecture Guide
Multi-Standard Support Guide
2. User Documentation
Quick Start Guide
# Quick Start: Safety-Critical WebAssembly Runtime
## Automotive (ISO 26262)
```toml
# For ASIL-D automotive applications
[dependencies]
wrt = { version = \"*\", features = [\"iso-26262\", \"asil-d\"] }Aerospace (DO-178C)
# For DAL-A aerospace applications
[dependencies]
wrt = { version = \"*\", features = [\"do-178c\", \"dal-a\"] }Medical (IEC 62304)
# For Class C medical devices
[dependencies]
wrt = { version = \"*\", features = [\"iec-62304\", \"class-c\"] }
#### Feature Selection Guide
- [ ] **Safety Level Selection**: How to choose appropriate safety levels for your application
- [ ] **Memory Strategy Selection**: When static/bounded/managed allocation is appropriate
- [ ] **Capability Composition**: How to combine safety capabilities for specific requirements
- [ ] **Common Combinations**: Pre-defined feature combinations for typical use cases
#### Migration Guide
- [ ] **From Legacy Features**: Step-by-step migration from old mixed features
- [ ] **Breaking Changes**: Comprehensive list of breaking changes and solutions
- [ ] **Compatibility Matrix**: What works with what across versions
- [ ] **Code Examples**: Before/after code examples for common patterns
### 3. API Documentation
#### Safety-Qualified APIs
- [ ] **Type System Documentation**: How safety-qualified types work
- [ ] **Memory Management APIs**: Documentation of safety-aware allocation
- [ ] **Safety Context Usage**: How to use safety contexts in applications
- [ ] **Verification APIs**: How to implement and use safety verification
#### Code Examples
```rust
// Example: ASIL-D automotive application
#[cfg(all(feature = \"iso-26262\", feature = \"asil-d\"))]
fn automotive_critical_function() -> Result<()> {
// Use static allocation for highest safety level
let provider = safety_alloc\!(1024, CrateId::Component)?;
let mut data = BoundedVec::new(provider)?;
// Formal verification required at ASIL-D
safety_guarded\!(SAFETY_CONTEXT, \"critical_operation\", {
// Safety-critical processing
process_automotive_data(&mut data)?;
Ok(())
})
}
// Example: DO-178C aerospace application
#[cfg(all(feature = \"do-178c\", feature = \"dal-a\"))]
fn aerospace_critical_function() -> Result<()> {
let ctx = universal_safety_context\!(Do178c(DalA));
// Coverage analysis required for DAL-A
let guard = SafetyGuard::new(&ctx, \"flight_control_operation\")?;
// Process flight-critical data
let result = process_flight_data()?;
guard.complete()?;
Ok(result)
}
4. Qualification Documentation
Certification Templates
Requirements Traceability
Evidence Generation
# Generate qualification documentation
cargo wrt requirements matrix --standard iso-26262 --level asil-d --output docs/
# Generate formal verification evidence
cargo wrt kani-verify --features=\"iso-26262,asil-d\" --evidence-output docs/verification/
# Generate coverage reports
cargo wrt test-features --coverage mcdc --output docs/coverage/
5. Development Documentation
Contributor Guide
Maintenance Documentation
Implementation Tasks
Documentation Infrastructure:
Content Creation:
Visual Documentation:
Interactive Documentation:
Validation:
Deliverables
User-Facing Documentation:
- Getting Started Guide: Quick introduction to multi-standard safety
- Feature Reference: Complete reference of all features and their purposes
- Migration Guide: Step-by-step upgrade instructions
- Best Practices: Recommended patterns for each safety level
Developer Documentation:
- Architecture Guide: Deep technical documentation of the four-layer system
- API Reference: Complete API documentation with safety annotations
- Testing Guide: How to test safety-critical code effectively
- Contribution Guidelines: How to contribute safely to the project
Qualification Documentation:
- Certification Templates: Ready-to-use templates for all supported standards
- Evidence Packages: Automated generation of certification evidence
- Compliance Checklists: Validation checklists for each safety level
- Traceability Matrices: Requirements to implementation traceability
Acceptance Criteria
Success Metrics
- Users can successfully select appropriate safety levels without expert consultation
- Migration from legacy features can be completed following documentation alone
- Certification bodies accept generated qualification documentation
- Developer onboarding time for safety-critical development is reduced
- Support requests decrease due to comprehensive documentation
- Documentation remains current with code changes through automation
Overview
Create comprehensive documentation for the new four-layer safety architecture, including user guides, migration documentation, and qualification evidence templates.
Parent Issue: #101
Depends on: #102, #103, #104
Documentation Scope
1. Architecture Documentation
System Architecture Guide
stdcannot be used in safety-critical contextsMulti-Standard Support Guide
2. User Documentation
Quick Start Guide
Aerospace (DO-178C)
Medical (IEC 62304)
4. Qualification Documentation
Certification Templates
Requirements Traceability
Evidence Generation
5. Development Documentation
Contributor Guide
Maintenance Documentation
Implementation Tasks
Documentation Infrastructure:
Content Creation:
Visual Documentation:
Interactive Documentation:
Validation:
Deliverables
User-Facing Documentation:
Developer Documentation:
Qualification Documentation:
Acceptance Criteria
Success Metrics