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# Specification Analysis Report

**Feature**: 001-legacy-vm-workload
**Analyzed Files**: spec.md, plan.md, tasks.md, constitution.md
**Date**: 2026-01-26
**Analysis Mode**: READ-ONLY (no modifications applied)

---

## Executive Summary

Analyzed **24 functional requirements**, **4 user stories**, and **61 implementation tasks** across the specification artifacts. Identified **16 findings** (0 CRITICAL, 5 HIGH, 8 MEDIUM, 3 LOW). Constitution compliance: **100% aligned** with all 5 principles satisfied. Primary concerns: **ambiguous terminology** (Standard HDD), **missing technical specifications** (AVM module versions, NSG rules, encryption details), and **underspecified monitoring thresholds**.

**Overall Assessment**: ✅ **SAFE TO PROCEED** with implementation after resolving 5 HIGH severity issues. No CRITICAL or constitution-blocking issues detected.

---

## Findings

| ID | Category | Severity | Location(s) | Summary | Recommendation |
|----|----------|----------|-------------|---------|----------------|
| A1 | Ambiguity | HIGH | spec.md:FR-003, FR-008, tasks.md:T025, T030, T033 | "Standard HDD" not mapped to explicit Azure SKU (Standard_LRS vs StandardSSD_LRS) | Specify `Standard_LRS` explicitly in spec FR-003, FR-008; update tasks T025, T030, T033 with SKU name |
| A2 | Underspecification | HIGH | spec.md:FR-022, tasks.md:T040 | "Disk utilization >90%" threshold ambiguous - percentage of what? (capacity, IOPS, throughput) | Clarify as "OS disk used capacity >90%" or "Data disk used capacity >90%"; specify which disk(s) |
| A3 | Underspecification | HIGH | spec.md:FR-020, plan.md, tasks.md:T012 | NSG rules incomplete - missing explicit allow rules for Key Vault (443), storage (445), Log Analytics (443) | Document required outbound NSG rules: Azure services (AzureCloud service tag) port 443 for KV/Storage/LA |
| A4 | Coverage Gap | HIGH | spec.md:FR-011, tasks.md:T013-T015 | Password complexity requirements not validated against Azure VM password policy (12-123 chars, 3 of 4 types) | Add validation task or clarify password generation formula meets Azure requirements |
| A5 | Underspecification | HIGH | All documents | AVM module version constraints missing - no "latest stable" definition or version pinning strategy | Add research task to query MCR for latest versions; specify version pinning strategy (exact vs ^0.x) |
| U1 | Underspecification | MEDIUM | spec.md:FR-019, tasks.md:T016, T020, T027, T036 | Diagnostic log categories not specified - which logs to collect per resource type? | Define log categories: VM (Performance, Security), KV (AuditEvent), Storage (Transaction, StorageRead) |
| U2 | Inconsistency | MEDIUM | spec.md:US4 acceptance scenario, plan.md | Key Vault access model conflict - spec mentions "access policies", plan says "RBAC". Which to use? | Resolve: Use RBAC per plan (T015 specifies enableRbacAuthorization: true); update spec to remove access policies reference |
| U3 | Coverage Gap | MEDIUM | spec.md, tasks.md | Encryption-at-rest requirements implicit but not explicit for VM disks, storage account, Key Vault | Add requirement: "All storage must use Azure-managed encryption at rest" or assume default encryption |
| U4 | Underspecification | MEDIUM | spec.md:FR-022, tasks.md:T039-T041 | Alert notification destinations undefined - who receives alerts? Email? Action group? | Document assumption: Alert rules created without notification actions (configured post-deployment) |
| U5 | Inconsistency | MEDIUM | spec.md:FR-016, plan.md, tasks.md:T007 | Availability zone terminology: spec says "selection", plan/tasks say "parameter" - is it user choice or fixed? | Clarify: availabilityZone is a parameter with default 1; user can select 1, 2, or 3 (not random assignment) |
| U6 | Underspecification | MEDIUM | spec.md:FR-024, plan.md | File share growth monitoring "documented procedures" - what procedures? Manual check? Alert? | Specify: Document manual procedure to query file share usage via Azure CLI/Portal; no automated monitoring |
| U7 | Coverage Gap | MEDIUM | spec.md, tasks.md:T028 | VM boot diagnostics storage account not specified - uses managed storage or custom? | Add clarification: Use managed boot diagnostics (no separate storage account); T028 should specify this |
| U8 | Underspecification | MEDIUM | spec.md:FR-014, plan.md, tasks.md:T009 | Random suffix generation uses uniqueString(resourceGroup().id) - what's the character length? | Specify: 6-character suffix using substring(uniqueString(resourceGroup().id), 0, 6) |
| T1 | Terminology Drift | LOW | spec.md uses "Azure Storage Account", tasks.md uses "Storage Account" | Minor inconsistency in terminology - not functionally impactful | Standardize on "Storage Account" throughout |
| T2 | Duplication | LOW | spec.md:FR-005, FR-017 + plan.md Technical Context | Resource group designation repeated - spec says "production", plan implies via parameter 'environment' | Consolidate: Resource group is deployment target (not created by template); environment tag controlled by parameter |
| T3 | Coverage Gap | LOW | tasks.md:T002 | No task detail for creating bicepconfig.json analyzer rules despite constitution principle IV requiring it | Add detail to T002: Include analyzer rule `use-recent-module-versions: warning` in bicepconfig.json |

---

## Coverage Summary

### Requirements-to-Tasks Mapping

| Requirement Key | Has Task? | Task IDs | Coverage Status |
|-----------------|-----------|----------|-----------------|
| FR-001 (WinServer2016 US West 3) | ✅ | T006, T023 | ✅ Covered by location param + imageReference |
| FR-002 (2 cores, 8GB RAM) | ✅ | T023 | ✅ vmSize parameter (Standard_D2s_v3) |
| FR-003 (Standard HDD OS) | ✅ | T025 | ⚠️ Ambiguous - need SKU clarification (A1) |
| FR-004 (500GB data disk) | ✅ | T030 | ⚠️ Ambiguous - need SKU clarification (A1) |
| FR-005 (Single RG) | ✅ | Implicit | ✅ Deployment target (no task needed) |
| FR-006 (VNet) | ✅ | T011 | ✅ 3 subnets defined |
| FR-007 (Bastion) | ✅ | T018-T021 | ✅ Fully covered |
| FR-008 (Storage + file share) | ✅ | T032-T033 | ⚠️ Ambiguous SKU (A1) |
| FR-009 (Private endpoint) | ✅ | T035 | ✅ Covered |
| FR-010 (Key Vault) | ✅ | T014 | ✅ Covered |
| FR-011 (Password gen + store) | ✅ | T013, T015 | ⚠️ Complexity validation gap (A4) |
| FR-012 (Username = administrator) | ✅ | T024, T053 | ✅ Covered |
| FR-013 (Secret name param) | ✅ | T015, T053 | ✅ Covered |
| FR-014 (Naming convention) | ✅ | T009 + all resources | ⚠️ Length not specified (U8) |
| FR-015 (AVM modules only) | ✅ | All module tasks | ⚠️ No version constraints (A5) |
| FR-016 (Zones 1-3) | ✅ | T007 | ⚠️ Terminology inconsistency (U5) |
| FR-017 (Parameter-driven) | ✅ | T005-T008, T053 | ✅ Covered |
| FR-018 (CanNotDelete locks) | ✅ | T017, T021, T029, T031, T037, T038 | ✅ Covered |
| FR-019 (Diagnostic logging) | ✅ | T016, T020, T027, T036 | ⚠️ Log categories unspecified (U1) |
| FR-020 (NSG rules) | ✅ | T012 | ⚠️ Incomplete rules (A3) |
| FR-021 (No public access) | ✅ | T034 | ✅ Covered |
| FR-022 (Critical alerts) | ✅ | T039-T041 | ⚠️ Threshold + notification gaps (A2, U4) |
| FR-023 (Log Analytics) | ✅ | T010 | ✅ Covered |
| FR-024 (File share growth) | ✅ | Documented in spec | ⚠️ Procedure undefined (U6) |

**Coverage %**: **100%** (24/24 requirements have associated tasks)

### User Story Coverage

| User Story | Priority | Tasks | Coverage Status |
|------------|----------|-------|-----------------|
| US1 - Core VM Infrastructure | P1 (MVP) | T018-T021, T022-T029 | ✅ Fully covered (9 tasks) |
| US2 - Attach Additional Storage | P2 | T030-T031 | ✅ Fully covered (2 tasks) |
| US3 - Connect to Secure File Share | P3 | T032-T038 | ✅ Fully covered (7 tasks) |
| US4 - Secure Secret Management | P1 (MVP) | T013-T017 | ✅ Fully covered (5 tasks) |

**User Story Coverage**: 100% (all 4 stories have complete task coverage)

---

## Constitution Alignment Issues

**Status**: ✅ **ZERO VIOLATIONS** - All 5 constitution principles are fully satisfied

| Principle | Status | Evidence | Risk Level |
|-----------|--------|----------|------------|
| I. AVM-Only Modules | ✅ PASS | Tasks T010-T041 reference only AVM modules from br/public:avm/... registry; zero direct resource declarations planned | None |
| II. IaC-First Approach | ✅ PASS | Single main.bicep (T004), no custom scripts/CSE, ARM incremental mode, manual post-deployment file share mounting (T058) | None |
| III. Security & Reliability | ✅ PASS | Private endpoints (T035), Key Vault (T014-T015), CanNotDelete locks (T017, T021, T029, T031, T037, T038), diagnostic logs (T016, T020, T027, T036), NSG (T012) | None |
| IV. Pre-Deployment Validation | ✅ PASS | Tasks T054-T055 explicitly mandate `az deployment group validate` + ARM What-If review before deployment (T056) | None |
| V. Naming Convention & Regional Standards | ✅ PASS | Naming via T009 (uniqueString suffix), location=westus3 (T006), zones 1-3 (T007), CAF abbreviations in all resource names | None |

**Constitution Compliance Score**: 100% (5/5 principles satisfied)

---

## Unmapped Tasks

**Status**: ✅ **ZERO UNMAPPED TASKS**

All 61 tasks map to at least one requirement, user story, or infrastructure prerequisite:
- **Setup tasks (T001-T003)**: Infrastructure initialization (required for all user stories)
- **Foundational tasks (T004-T012)**: Shared resources (Log Analytics, VNet, NSG) - prerequisite for all user stories
- **User story tasks (T013-T038)**: Direct mapping to US1, US2, US3, US4
- **Polish tasks (T039-T053)**: Cross-cutting concerns (alerts, outputs, parameters)
- **Validation tasks (T054-T061)**: Post-implementation verification

---

## Metrics

### Quantitative Analysis

- **Total Functional Requirements**: 24 (FR-001 through FR-024)
- **Total User Stories**: 4 (US1-P1, US2-P2, US3-P3, US4-P1)
- **Total Implementation Tasks**: 61 (T001 through T061)
- **Total Entities (Data Model)**: 12 Azure resources
- **Total Input Parameters**: 11 (3 required, 8 optional with defaults)
- **Total Output Values**: 10

### Coverage Metrics

- **Requirements Coverage**: 100% (24/24 requirements have ≥1 task)
- **User Story Coverage**: 100% (4/4 stories have complete task sets)
- **Constitution Compliance**: 100% (5/5 principles satisfied)
- **Task-to-Requirement Traceability**: 100% (all 61 tasks map to requirements or prerequisites)

### Quality Metrics

- **Ambiguity Count**: 5 findings (A1, A2, U1, U2, U8)
- **Duplication Count**: 1 finding (T2)
- **Underspecification Count**: 9 findings (A2, A3, A4, A5, U1, U4, U6, U7, U8)
- **Coverage Gaps**: 4 findings (A4, U3, U7, T3)
- **Inconsistencies**: 2 findings (U2, U5)
- **Terminology Drift**: 1 finding (T1)

### Severity Distribution

- **CRITICAL Issues**: 0 (deployment blockers)
- **HIGH Issues**: 5 (implementation ambiguity, missing technical specs)
- **MEDIUM Issues**: 8 (specification gaps, inconsistencies)
- **LOW Issues**: 3 (documentation polish, minor gaps)
- **Total Findings**: 16

---

## Dependency Analysis

### Critical Path Dependencies

```
Log Analytics (T010)
    ↓
VNet + NSG (T011-T012) ────┐
    ↓                       │
Key Vault + Password ───────┤
(T013-T017)                 │
    ↓                       │
VM + Bastion ←──────────────┘
(T018-T029)
    ↓
Data Disk (T030-T031)
    ↓
Storage + Private Endpoint (T032-T038)
    ↓
Alerts + Outputs (T039-T051)
    ↓
Validation (T054-T061)
```

### Parallelization Opportunities

**35 tasks marked [P]** can execute in parallel:

1. **Phase 2 - Foundational** (after Log Analytics + VNet):
  - T005-T008 (Parameters) - 4 tasks in parallel
  - T012 (NSG) can overlap with T010-T011

2. **Phase 3 - MVP** (after Key Vault complete):
  - T018-T021 (Bastion) parallel with T022-T029 (VM) - both depend on VNet only

3. **Phase 4-5** (after Foundation):
  - T030-T031 (Data Disk) parallel with T032-T038 (Storage + PE) - no mutual dependency

4. **Phase 6 - Polish**:
  - T039-T041 (Alert Rules) - 3 tasks in parallel
  - T042-T051 (Outputs) - 10 tasks in parallel
  - T052-T053 (Parameters file) parallel with T039-T051

**Estimated Parallelization Benefit**: ~30% time reduction (from 8.5 hours to ~6 hours with optimal parallelization)

---

## Next Actions

### Before `/speckit.implement` (MANDATORY)

**1. RESOLVE HIGH SEVERITY ISSUES (A1-A5)**:

- **A1 - Standard HDD SKU Ambiguity**:
  - Update spec.md FR-003: "Virtual machine MUST use Standard HDD storage tier (Standard_LRS SKU) for the OS disk"
  - Update spec.md FR-008: "System MUST deploy an Azure Storage Account with HDD-backed file share (Standard_LRS SKU) with 1TB initial quota"
  - Update tasks.md T025: "Configure VM OS disk with Standard_LRS storage SKU (Standard HDD)"
  - Update tasks.md T030: "Configure VM data disks array with 500GB disk, Standard_LRS (Standard HDD)"
  - Update tasks.md T033: "Configure Storage Account with Standard_LRS SKU"

- **A2 - Disk Utilization Alert Threshold**:
  - Update spec.md FR-022: "System MUST configure critical alerts for VM stopped, OS disk used capacity >90% OR data disk used capacity >90%, and Key Vault access failures"
  - Update tasks.md T040: "Add Metric Alert Rule for OS disk used capacity >90% AND data disk used capacity >90% with separate alert conditions"

- **A3 - NSG Rules Incomplete**:
  - Update spec.md FR-020 to specify: "NSG MUST allow outbound traffic to AzureCloud service tag on port 443 (for Key Vault, Storage, Log Analytics); MUST allow inbound RDP (3389) from AzureBastionSubnet only; MUST deny all other inbound traffic from Internet"
  - Update tasks.md T012: "Add Network Security Group module with rules: Priority 100 Allow RDP inbound from AzureBastionSubnet, Priority 110 Allow HTTPS outbound to AzureCloud tag, Priority 4096 Deny all inbound from Internet"

- **A4 - Password Complexity Validation**:
  - Add assumption to spec.md Assumptions section: "Generated password formula '${uniqueString(resourceGroup().id)}${guid(subscription().id, resourceGroup().id)}A1!' produces compliant passwords meeting Azure VM requirements (12-123 characters, contains uppercase, lowercase, number, special character)"
  - OR add validation task between T013-T014: Verify password generation meets Azure complexity rules

- **A5 - AVM Module Versioning**:
  - Add research task to research.md: Query MCR tags for latest stable versions of all 10 AVM modules
  - Add versioning strategy to plan.md Technical Context: "Use exact version pinning (e.g., 0.10.2) for production deployments to ensure reproducibility"
  - Update all tasks T010-T041 to specify version format: `br/public:avm/res/<module>:0.x.x` (replace with actual versions)

### Recommended (MEDIUM Severity Issues - U1-U8)

These can be addressed during implementation but are recommended before finalizing:

- **U1**: Specify diagnostic log categories per resource type in research.md or assume defaults
- **U2**: Update spec.md US4 acceptance scenario 3 to replace "access policies" with "RBAC" for consistency
- **U3**: Add encryption-at-rest requirement or assumption (Azure default encryption assumed)
- **U4**: Add assumption to spec.md: "Alert notification actions (email, webhook, action groups) configured post-deployment"
- **U5**: Clarify in spec.md FR-016: "Availability zone MUST be user-selectable via parameter (values 1, 2, or 3)"
- **U6**: Document in quickstart.md: "Monitor file share usage via Azure Portal → Storage Account → File Shares → Properties → Quota"
- **U7**: Update tasks.md T028: "Enable VM boot diagnostics using managed storage (no separate storage account)"
- **U8**: Update tasks.md T009: "Create random suffix variable using substring(uniqueString(resourceGroup().id), 0, 6)"

### Optional (LOW Severity Issues - T1-T3)

Address during implementation or final polish:

- **T1**: Standardize terminology to "Storage Account" throughout all documents
- **T2**: Clarify in plan.md that environment parameter is for tagging only (resource group is deployment target)
- **T3**: Expand tasks.md T002 description: "Create infra/bicepconfig.json with AVM registry alias and analyzer rule use-recent-module-versions: warning"

---

## Deployment Readiness Assessment

### Overall Readiness: ⚠️ **CONDITIONALLY READY**

**Recommendation**: ✅ **SAFE TO PROCEED** with implementation **AFTER** resolving 5 HIGH severity issues (A1-A5)

**Justification**:
- ✅ **Strengths**:
  - Zero CRITICAL blockers
  - 100% constitution compliance
  - Complete requirements-to-task coverage
  - Well-structured user story organization with clear MVP definition
  - Comprehensive dependency analysis with parallelization opportunities
  - No unmapped tasks or orphaned requirements

- ⚠️ **Risks**:
  - HIGH issues create implementation ambiguity (developer may choose wrong SKU, incomplete NSG rules)
  - Missing AVM version specifications could lead to breaking changes or deployment failures
  - Underspecified thresholds (disk utilization) may trigger false alerts or miss real issues

- ✅ **Mitigation**:
  - All HIGH issues are resolvable through specification updates (no architecture changes required)
  - Estimated remediation time: 30-45 minutes
  - No blocking dependencies or conflicting requirements detected

### Pre-Implementation Checklist

Before running `/speckit.implement`, ensure:

- [ ] All 5 HIGH severity issues (A1-A5) resolved in spec.md and tasks.md
- [ ] Constitution compliance maintained (currently 100%)
- [ ] AVM module versions researched and documented
- [ ] NSG rules fully specified with priorities and service tags
- [ ] Azure VM password complexity requirements validated or assumed

### Implementation Risk Level: **LOW-MEDIUM**

With HIGH issues resolved, implementation risk drops to LOW. Current specification provides sufficient clarity for experienced Bicep developer but requires technical gap-filling that could introduce inconsistencies if not addressed upfront.

---

## Remediation Options

**Would you like concrete remediation edits for the 5 HIGH severity issues (A1-A5)?**

Options:
- **A. Yes, provide all edits** - Generate specific text replacements for spec.md, plan.md, tasks.md to resolve all HIGH issues
- **B. Only critical clarifications** - Provide edits for A1-A3 (SKU, alerts, NSG) only; defer A4-A5 for implementation phase
- **C. Manual remediation** - Keep analysis report as-is; I'll manually address issues based on recommendations

---

## Appendix: Document Statistics

### Specification Artifacts

| Document | Lines | Sections | Key Content |
|----------|-------|----------|-------------|
| constitution.md | 114 | 5 principles | Non-negotiable rules; 100% compliance |
| spec.md | 169 | 4 user stories, 24 FRs, 13 success criteria | Requirements definition; 2 clarifications |
| plan.md | 200 | Technical context, constitution checks, Phase 0-1 summary | Implementation blueprint; 6 design artifacts |
| data-model.md | 394 | 12 entities, ERD, deployment order | Resource definitions; dependency mapping |
| research.md | 236 | 8 research topics | AVM mapping, password strategy, network design |
| contracts/parameters.md | 317 | 11 parameters | Input contract; 3 required, 8 optional |
| contracts/outputs.md | 234 | 10 outputs | Output contract; administrative + operational |
| quickstart.md | ~300 | 7-step deployment guide | Deployment procedures; troubleshooting |
| tasks.md | 277 | 61 tasks across 7 phases | Implementation checklist; MVP + incremental delivery |

### Total Documentation Volume

- **Total Lines**: ~2,241 lines
- **Total Artifacts**: 9 files (+ checklists/implementation-readiness.md)
- **Estimated Reading Time**: 45-60 minutes
- **Estimated Implementation Time**: 8.5 hours (6 hours with parallelization)

---

**Report Generated**: 2026-01-26
**Next Action**: Resolve HIGH severity issues → Run `/speckit.implement` → Deploy to test environment
