# Roadmap - 6-Month Implementation Timeline

## Executive Overview

**Total Effort**: ~180 developer-days
**Timeline**: 6 months (26 weeks)
**Team**: 1-2 full-time developers
**Phases**: 4 phases + ongoing maintenance

## Phase 1: Foundation (Weeks 1-2) - Essential Features

Focus: Core convenience and security features

### Week 1: Lexer & Parser Updates

**Timeline**: Mon-Fri

```
Mon: Set up feature branches, environment
Tue-Wed: Add CONST, ELIF tokens and keywords
Thu-Fri: Parser implementation for both
```

**Features**:
- `const` ✅ immutable variables
- `elif` ✅ else-if conditionals

**Deliverables**:
- ✅ Lexer recognizes const, elif
- ✅ Parser generates correct AST
- ✅ 10+ test cases passing
- ✅ Initial documentation

**Git PR**: phase/1-foundation

---

### Week 2: Evaluator & Testing

**Timeline**: Mon-Fri

```
Mon-Tue: Implement evaluator logic
Wed-Thu: Write comprehensive tests
Fri: Documentation & code review
```

**Activities**:
- Implement ConstStatement evaluation
- Implement IfExpression with elif chain
- Handle error cases
- Write unit tests
- Create code examples

**Deliverables**:
- ✅ Both features fully functional
- ✅ 50+ test cases
- ✅ Documentation in docs/
- ✅ Code examples working

**Testing Checklist**:
```
const:
[ ] Basic constant declaration
[ ] Cannot reassign const
[ ] Const with complex types
[ ] Const in loops
[ ] Error handling

elif:
[ ] Basic elif chain
[ ] Multiple elifs
[ ] Nested elif
[ ] elif without else
[ ] Mixed with boolean operators
```

---

## Phase 2: Security & Performance Foundation (Weeks 3-5)

Focus: Compliance and performance-critical features

### Week 3: `seal` Review + `defer`

**Status**: `seal` already implemented, review/test it

**New Feature**: `defer` statement

**Timeline**:
```
Mon-Tue: Review seal implementation
Wed-Thu: Implement defer
Fri: Documentation
```

**defer Implementation**:
- Parser: defer keyword
- Evaluator: defer stack management
- Test: resource cleanup scenarios

**Deliverables**:
- ✅ seal documentation complete
- ✅ defer fully functional
- ✅ 30+ test cases
- ✅ Real use case examples

---

### Week 4: `pattern` - Pattern Matching

**Timeline**:
```
Mon-Tue: Design pattern syntax
Wed: Parser implementation
Thu: Evaluator implementation
Fri: Testing & documentation
```

**Pattern Matching Features**:
- Array destructuring
- Object destructuring
- Nested patterns
- Guard expressions
- Default patterns

**Test Coverage**:
```
[ ] Simple array patterns
[ ] Simple object patterns
[ ] Nested patterns
[ ] Wildcard patterns
[ ] Guard expressions
[ ] Type patterns
```

---

### Week 5: `audit` - Compliance Logging

**Timeline**:
```
Mon-Wed: Design audit system
Thu: Implementation
Fri: Testing & integration
```

**Audit Features**:
- Log all data access
- Timestamp tracking
- Caller information
- Query API
- Retention policies

**Integration**:
- Hook into Map.get/set
- Hook into EntityInstance.get/set
- Configuration system

---

## Phase 3: Performance Tier (Weeks 6-11)

Focus: Native code, memory control, optimization

### Week 6-7: `native` - C/C++ Integration

**Timeline**: 10 days

This is the most complex feature.

**Key Tasks**:
- FFI layer design
- Type marshalling (Zexus ↔ C)
- Dynamic library loading
- Binding generation
- Error handling

**Prototype First**:
- Simple crypto bindings (md5, sha256)
- Test with libsodium
- Document FFI interface
- Publish example library

**Testing**:
```
[ ] Load dynamic library
[ ] Call function with proper types
[ ] Handle return values
[ ] Marshal arrays/strings
[ ] Error propagation
[ ] Memory safety
```

---

### Week 8: `gc` - Garbage Collection Control

**Timeline**: 5 days

**Features**:
- gc.pause()
- gc.resume()
- gc.collect()
- gc.stats()
- Configuration API

**Integration**:
- Hook into runtime's GC
- Statistics collection
- Performance monitoring

---

### Week 9: `buffer` - Direct Memory Access

**Timeline**: 5 days

**Features**:
- buffer.allocate(size)
- buffer.read_* (u8, u16, u32, u64, f64)
- buffer.write_* (u8, u16, u32, u64, f64)
- buffer.copy_from_string()
- buffer.free()

**Safety**:
- Bounds checking
- Type safety
- Alignment guarantees

---

### Week 10: `inline` - Function Inlining

**Timeline**: 5 days

**Implementation**:
- Parser: inline keyword
- Compiler: inlining decisions
- Heuristics for when to inline
- Performance testing

---

### Week 11: `simd` - Vector Operations

**Timeline**: 6 days

**SIMD Operations**:
- Vector creation
- Add, multiply, divide
- Dot product
- Cross product
- Hardware intrinsics

---

## Phase 4: Advanced & Polish (Weeks 12-24)

Focus: Advanced features and production readiness

### Week 12-13: `enum` - Type-Safe Enumerations

**Timeline**: 10 days

**Enum Features**:
- Enum type definition
- Variants with values
- Pattern matching integration
- Type checking
- Serialization

---

### Week 14-15: `restrict` - Field-Level Access

**Timeline**: 10 days

**Features**:
- Role-based access
- User-based access
- Wildcard patterns
- Permission checking
- Cache invalidation

---

### Week 16-18: `stream` - Event Streaming

**Timeline**: 15 days

**Stream Operators**:
- map, filter, reduce
- merge, zip
- throttle, debounce
- subscribe, unsubscribe
- Error handling

---

### Week 19-20: `watch` - Reactive State

**Timeline**: 10 days

**Reactivity Features**:
- Object wrapping
- Watcher registration
- Computed properties
- Dependency tracking
- Performance optimization

---

### Week 21-22: `sandbox` - Isolated Execution

**Timeline**: 10 days

**Sandbox Features**:
- Code isolation
- Permission system
- Resource limits
- Timeout handling
- Capability security

---

### Week 23-24: Polish & Integration

**Timeline**: 10 days

**Activities**:
- Performance optimization
- Bug fixes
- Documentation review
- Integration testing
- Final security audit

---

## Maintenance & Support (Week 25-26)

**Activities**:
- Bug fixes from testing
- Documentation updates
- Community feedback
- Performance tuning
- Deployment preparation

---

## Dependencies & Ordering

### Critical Path (must do in order)
```
1. const, elif (foundation)
2. seal (review/document)
3. defer, pattern (convenience)
4. native (enables others)
5. gc, buffer (performance)
6. enum (type system)
7. audit, restrict (security)
8. stream, watch (advanced)
9. sandbox (safety)
```

### Can Parallelize
- Week 4: pattern (one dev)
- Week 5: audit (one dev) while Week 3 continues

---

## Resource Allocation

### Scenario: 1 Developer
- Phase 1: 2 weeks
- Phase 2: 3 weeks
- Phase 3: 6 weeks
- Phase 4: 12-13 weeks
- **Total**: ~24 weeks (6 months)

### Scenario: 2 Developers
- Phase 1: 2 weeks (both)
- Phase 2: 2 weeks (parallel)
- Phase 3: 3 weeks (parallel)
- Phase 4: 6-7 weeks (parallel)
- **Total**: ~13 weeks (3-3.5 months)

---

## Risk Mitigation

| Phase | Risk | Mitigation |
|-------|------|-----------|
| 1 | Lexer/parser bugs | Extensive testing, peer review |
| 2 | Pattern complexity | Start simple, iterate |
| 3 | Native FFI issues | Prototype with 1 library first |
| 3 | Performance issues | Benchmarking, profiling |
| 4 | Stream/watch complexity | Use existing libraries as reference |
| 4 | Sandbox security | Security audit, penetration testing |

---

## Success Metrics by Phase

### Phase 1 Success
- ✅ const keyword works
- ✅ elif chains work
- ✅ All tests pass
- ✅ No performance regression

### Phase 2 Success
- ✅ pattern matching works
- ✅ defer cleanup guaranteed
- ✅ audit logs generated
- ✅ No security issues

### Phase 3 Success
- ✅ native code calls work
- ✅ 2-10x performance improvements
- ✅ Memory access safe
- ✅ GC control effective

### Phase 4 Success
- ✅ enum type safety verified
- ✅ Stream operations functional
- ✅ Reactivity working
- ✅ Sandbox isolation confirmed

---

## Release Strategy

### v1.1.0 (Week 2)
- `const`, `elif`
- Convenience foundation

### v1.2.0 (Week 5)
- `seal` (review), `defer`, `pattern`
- Developer experience

### v1.3.0 (Week 11)
- `native`, `gc`, `buffer`, `inline`, `simd`
- Performance tier

### v2.0.0 (Week 24)
- All remaining features
- Major version bump for new capabilities

---

## Documentation Timeline

Each week includes documentation updates:

**Week 1-2**:
- Command reference for const, elif
- Tutorial: Using constants
- Tutorial: Multi-branch if statements

**Week 3-5**:
- defer guide
- Pattern matching tutorial
- Audit configuration guide

**Week 6-11**:
- Native FFI documentation
- Performance tuning guide
- Memory management

**Week 12-24**:
- Advanced features guides
- Integration examples
- Best practices

---

## Budget & Estimation

### Developer Costs
- 1 Developer, 6 months: ~$60K - $100K
- 2 Developers, 3 months: ~$60K - $100K

### Infrastructure
- Existing (no new costs)

### Total Investment
- ~$80K - $150K

### Expected ROI
- Market expansion: $2M → $50M+
- Revenue increase: 25x
- Payback period: < 1 month

---

## Next Steps

1. ✅ Approval to begin Phase 1
2. Set up feature branches
3. Allocate developer(s)
4. Begin Week 1 tasks
5. Daily standups
6. Weekly reviews

---

**Questions?**
- What's the critical path? → See "Critical Path" section
- Can we parallelize? → See "Can Parallelize" section  
- What if we need to accelerate? → Allocate 2nd developer
- What if a feature is delayed? → See "Risk Mitigation"
