# Linux_Patch_API - Development Roadmap

## Project Timeline Overview

**Start Date:** 2026-04-09  
**Target Production:** 2026-07-17  
**Total Duration:** 14 weeks (Aggressive timeline)  
**Phase Strategy:** Sequential (no overlap)

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## Project Phases

### Phase 0: Rust Project Scaffolding
**Duration:** 3 days  
**Target Date:** 2026-04-09 to 2026-04-12  
**Status:** Ready to Start

- [ ] Initialize Rust project with Cargo
- [ ] Set up project structure (src/, tests/, configs/)
- [ ] Configure Cargo.toml with dependencies (actix-web, tokio, openssl, serde, etc.)
- [ ] Set up Clippy and rustfmt for code quality
- [ ] Create initial module structure (api, auth, jobs, packages, config, logging)
- [ ] Configure .gitignore for Rust projects
- [ ] Set up initial logging framework

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### Phase 1: Foundation
**Duration:** 2 weeks  
**Target Date:** 2026-04-12 to 2026-04-26  
**Status:** Not Started

- [ ] Complete all specification documents ✅ (in progress)
- [ ] Set up development environment (Rust toolchain, IDE config)
- [ ] Initialize git repository ✅ (complete)
- [ ] Configure CI/CD pipeline (GitHub Actions or GitLab CI)
- [ ] Establish security baseline (dependency scanning, cargo-audit)
- [ ] Set up test framework (cargo test, integration test structure)
- [ ] Create systemd service file template
- [ ] Set up internal CA infrastructure for mTLS certs

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### Phase 2: Core API Development
**Duration:** 6 weeks  
**Target Date:** 2026-04-26 to 2026-06-07  
**Status:** Not Started

- [ ] Implement mTLS authentication layer
- [ ] Implement IP whitelist enforcement
- [ ] Build configuration management (YAML loading, validation, auto-reload)
- [ ] Build job manager (queue, status tracking, WebSocket broadcast)
- [ ] Implement Package Management endpoints:
  - GET /api/v1/packages (list/filter/sort)
  - GET /api/v1/packages/{name} (details)
  - POST /api/v1/packages (install)
  - PUT /api/v1/packages/{name} (update)
  - DELETE /api/v1/packages/{name} (remove)
- [ ] Implement Patch Management endpoints:
  - GET /api/v1/patches (list available)
  - POST /api/v1/patches/apply (apply patches)
- [ ] Implement System endpoints:
  - GET /api/v1/system/info
  - GET /api/v1/health
  - POST /api/v1/system/reboot
- [ ] Implement Job Management endpoints:
  - GET /api/v1/jobs (list)
  - GET /api/v1/jobs/{id} (status)
  - POST /api/v1/jobs/{id}/rollback
- [ ] Implement WebSocket streaming (/api/v1/ws/jobs)
- [ ] Implement audit logging (systemd journal + file fallback)
- [ ] Unit test coverage >95%
- [ ] Integration tests for all endpoints

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### Phase 3: Security Hardening
**Duration:** 3 weeks  
**Target Date:** 2026-06-07 to 2026-06-28  
**Status:** Not Started

- [ ] Penetration testing (internal/external)
- [ ] Threat model validation (verify all STRIDE mitigations)
- [ ] Security control implementation review
- [ ] Fuzz testing on API endpoints
- [ ] Certificate validation testing
- [ ] Config file tampering resistance testing
- [ ] Privilege escalation testing
- [ ] Fix all security findings
- [ ] Security documentation completion

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### Phase 4: Production Readiness
**Duration:** 3 weeks  
**Target Date:** 2026-06-28 to 2026-07-17  
**Status:** Not Started

- [ ] Performance optimization (benchmarking, profiling)
- [ ] Documentation completion (README, deployment guide, API docs)
- [ ] Deployment automation (package creation: .deb, .rpm)
- [ ] Installation script development
- [ ] User acceptance testing
- [ ] Final security review
- [ ] Production deployment checklist
- [ ] Release v1.0.0

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## Milestones

| Milestone | Description | Target Date | Status |
|-----------|-------------|-------------|--------|
| M0 | Phase 0 complete (scaffolding) | 2026-04-09 | ✅ Complete |
| M1 | All spec documents complete | 2026-04-09 | ✅ Complete |
| M2 | Development environment ready | 2026-04-15 | ⏳ Pending |
| M3 | CI/CD pipeline operational | 2026-04-22 | ⏳ Pending |
| M4 | mTLS + IP whitelist working | 2026-05-03 | ⏳ Pending |
| M5 | Core API functional (Alpha) | 2026-06-07 | ⏳ Pending |
| M6 | Security testing complete (Beta) | 2026-06-28 | ⏳ Pending |
| M7 | Production release (v1.0.0) | 2026-07-17 | ⏳ Pending |

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## Risk Register

| ID | Risk | Likelihood | Impact | Mitigation Strategy | Owner |
|----|------|------------|--------|---------------------|-------|
| R001 | Rust learning curve delays development | Medium | Medium | Pair programming, Rust documentation, community support | Dev Team |
| R002 | mTLS certificate management complexity | Medium | High | Early CA setup, detailed documentation, testing certs | Security |
| R003 | Package manager API differences across distros | High | Medium | Pluggable backend architecture, extensive testing per distro | Dev Team |
| R004 | Security vulnerabilities in dependencies | Low | High | cargo-audit in CI, regular dependency updates, minimal deps | Security |
| R005 | Performance issues with concurrent jobs | Medium | Medium | Load testing in Phase 3, configurable concurrency limits | Dev Team |
| R006 | Scope creep during development | Medium | High | Strict spec adherence, change control process | PM |
| R007 | Internal CA infrastructure delays | Low | High | Start CA setup in Phase 0, use test certs for development | Security |
| R008 | systemd integration issues | Low | Medium | Early systemd testing, reference existing Rust systemd services | Dev Team |

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## Resource Requirements

### Development Team
| Role | Count | Commitment |
|------|-------|------------|
| Rust Developer | 1-2 | Full-time |
| Security Engineer | 1 | Part-time (Phases 1, 3, 4) |
| QA/Test Engineer | 1 | Part-time (Phases 2, 3, 4) |

### Infrastructure
| Resource | Purpose | Notes |
|----------|---------|-------|
| Development Server | Code development | Ubuntu 22.04 LTS |
| Test Servers | Multi-distro testing | Ubuntu, Debian, RHEL, Alpine, Arch |
| CI/CD Runner | Automated testing | GitHub Actions or self-hosted |
| Internal CA | Certificate issuance | Separate secure host |

### Tools & Services
| Tool | Purpose | Cost |
|------|---------|------|
| Rust Toolchain | Development | Free |
| cargo-audit | Security scanning | Free |
| Git/Gitea | Version control | Self-hosted |
| Wireshark | Network analysis | Free |
| Burp Suite | Security testing | Community (Free) |

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## Success Criteria

### Phase 0 Success
- [ ] Cargo project builds without errors
- [ ] All dependencies resolved
- [ ] Code quality tools configured and passing

### Phase 1 Success
- [ ] CI/CD pipeline runs on every commit
- [ ] Test framework operational with >95% coverage target
- [ ] Internal CA operational with test certificates

### Phase 2 Success
- [ ] All 15 API endpoints functional
- [ ] mTLS authentication working
- [ ] IP whitelist enforced
- [ ] WebSocket streaming operational
- [ ] Audit logging complete
- [ ] Unit test coverage >95%

### Phase 3 Success
- [ ] Penetration testing complete with all critical findings resolved
- [ ] Threat model validated
- [ ] Security documentation complete

### Phase 4 Success
- [ ] Performance benchmarks met
- [ ] Documentation complete
- [ ] Package builds (.deb, .rpm) successful
- [ ] UAT sign-off received
- [ ] v1.0.0 released

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*Following kiro spec-driven development standards*