Phase Enforcement Skill

Claude MUST check current phase before any work, REFUSE work that belongs to later phase.

Priority 1: Phase Gate Enforcement

Before any work:

1. Read .aid/state.json for current phase
2. Classify the requested work
3. Check if work is allowed
4. REFUSE if not allowed (show violation)
5. At phase completion: mandatory sub-agent review
6. After review passes: collect feedback via /aid end

Mandatory: Sub-Agent Review at Transitions

Before Phase N -> N+1:

1. Spawn review sub-agent
2. Sub-agent reviews all deliverables
3. Returns PASS/FAIL with findings
4. FAIL: Address issues, retry
5. PASS: Proceed to feedback

5-Phase Development Lifecycle

Phase	Name	Document	Folder
1	PRD	Product Requirements	docs/prd/
2	Tech Spec	Technical Specification	docs/tech-spec/
3	Impl Plan	Task Breakdown	docs/implementation-plan/
4	Development	Code & Tests	src/
5	QA & Ship	Deployment	Production

Work Classification

Category	Examples	First Allowed
requirements	PRD, user stories	Phase 1
architecture	System design, APIs	Phase 2
planning	Jira, task breakdown	Phase 3
coding	Components, tests	Phase 4
qa	Testing, deployment	Phase 5

Phase Permissions

• Phase 1: requirements
• Phase 2: requirements, architecture
• Phase 3: requirements, architecture, planning
• Phase 4: requirements, architecture, planning, coding
• Phase 5: all

Gate Check Requirements

Phase 1 -> 2

• PRD exists in docs/prd/
• User stories defined
• Acceptance criteria complete
• Sub-agent review PASSED

Phase 2 -> 3

• Tech Spec exists
• Architecture diagram
• API contracts
• Security assessment
• Sub-agent review PASSED

Phase 3 -> 4

• Implementation Plan exists
• Tasks broken down
• Dependencies identified
• Test strategy defined
• Sub-agent review PASSED

Phase 4 -> 5

• Code implemented
• Tests passing
• Coverage meets threshold
• Sub-agent review PASSED

Violation Template

PHASE GATE VIOLATION

Current Phase: [N] [Name]
Requested: [What]
Category: [Category]

This work belongs to Phase [X].

Complete first: [List]

Commands: /phase, /gate-check, /aid end

Sub-Agent Review Prompts

PRD Review (Phase 1 -> 2)

• Problem statement clear
• User stories As/I want/So that
• Acceptance criteria per story
• Non-functional requirements
• Measurable success metrics
• No implementation details

Tech Spec Review (Phase 2 -> 3)

• Architecture diagram
• Components defined
• Data models (TypeScript)
• API contracts
• Database schema
• Security assessment
• References PRD

Impl Plan Review (Phase 3 -> 4)

Phase 3 Golden Rules:

1. NO WORD LEFT BEHIND - PRD → Epic/Story, Tech Spec → Task
2. SMALL TASKS - Larger docs = smaller tasks
3. PROCESS IN CHUNKS - Read → Write immediately
4. VERIFY - 100% coverage required

Sub-Phases: 3a Consolidation → 3b Breakdown → 3c Enrichment → 3d Jira → 3e Verification

Checklist:

• Contradiction log created
• Source documents fixed
• Consolidated spec created
• Hierarchy: Epic → Story → Task
• Tasks sized appropriately
• All 8 required fields per Task
• 100% PRD/Tech Spec coverage
• Enriched files staged
• Jira populated with ADF

Development Review (Phase 4 -> 5)

• All tasks complete
• Tests passing
• Coverage >= 70%
• Lint passes
• Build succeeds
• No critical vulnerabilities

Exceptions

Always Allowed: Reading files, documentation updates, questions, /phase, /gate-check

Override: User says "override: [reason]" - logged to .aid/overrides.log

State File

.aid/state.json:

{
  "current_phase": 2,
  "phase_name": "tech-spec",
  "feature_name": "user-auth",
  "phases_completed": [1],
  "subagent_review": {"phase_1": {"status": "passed"}}
}