gistfile1.txt

# ADR-001: Feature Development Workflow

| Status | Date | Author |
|--------|------|--------|
| Accepted | 2026-01-22 | Engineering Team |

## Context

As our team scales, we need a consistent, repeatable process for developing features that ensures code quality while maintaining development velocity. Without a standardized workflow, we risk inconsistent quality, integration issues, and unclear handoff points between team members.

## Decision

We will adopt a structured feature development workflow consisting of four phases: Planning, Development Loop, Iteration Control, and Deployment.

---

### Phase 1: Planning

Before any code is written, features must go through a planning phase to ensure alignment and manageable scope.

```mermaid
flowchart TD
    Start((🎯 Feature Goal<br/>Story + Acceptance Criteria)) --> Decomp[📋 Decompose into Sub-Tasks]
    Decomp --> Prioritize[🔢 Prioritize & Estimate]
    Prioritize --> Branch[🌿 Create Feature Branch]
    Branch --> Ready((✅ Ready for<br/>Development))

    style Start fill:#6366f1,stroke:#4338ca,color:#fff
    style Decomp fill:#3b82f6,stroke:#2563eb,color:#fff
    style Prioritize fill:#3b82f6,stroke:#2563eb,color:#fff
    style Branch fill:#8b5cf6,stroke:#7c3aed,color:#fff
    style Ready fill:#22c55e,stroke:#16a34a,color:#fff
```

**Key Activities:**
- Define clear acceptance criteria for the feature
- Break down work into reviewable sub-tasks
- Estimate effort and prioritize based on dependencies
- Create feature branch from latest develop

---

### Phase 2: Development & Testing Loop

Each sub-task follows an iterative cycle of implementation, testing, and review.

```mermaid
flowchart TD
    subgraph DevLoop [🔄 Development Cycle]
        Coding[💻 Implement Logic Chunk]
        
        subgraph Testing [✅ Quality Gates]
            LocalTest[🧪 Local Testing]
            UnitTest[📊 Unit Tests]
            AIReview[🤖 AI-Assisted Review]
        end
        
        Coding --> LocalTest
        LocalTest --> UnitTest
        UnitTest --> AIReview
    end

    AIReview --> Review[👥 Human Peer Review]
    
    Review -- ❌ Changes Needed --> Coding
    Review -- ✅ Approved --> Merge[📤 Commit & Push]

    style Coding fill:#f59e0b,stroke:#d97706,color:#fff
    style LocalTest fill:#14b8a6,stroke:#0d9488,color:#fff
    style UnitTest fill:#14b8a6,stroke:#0d9488,color:#fff
    style AIReview fill:#a855f7,stroke:#9333ea,color:#fff
    style Review fill:#ec4899,stroke:#db2777,color:#fff
    style Merge fill:#22c55e,stroke:#16a34a,color:#fff
```

**Quality Gates:**
- Local testing must pass before committing
- Unit test coverage required for new logic
- AI-assisted review for initial feedback
- Human peer review required for all merges

---

### Phase 3: Iteration & Completion Control

Work progresses through chunks and sub-tasks until the feature is complete.

```mermaid
flowchart TD
    Merge[📤 Commit & Push] --> SubCheck{🔍 Sub-Task<br/>Complete?}
    
    SubCheck -- No, more chunks --> BackToCoding[💻 Next Logic Chunk]
    SubCheck -- Yes --> FeatureCheck{📦 Feature<br/>Complete?}
    
    FeatureCheck -- No, more sub-tasks --> BackToPlanning[📋 Next Sub-Task]
    FeatureCheck -- Yes --> ReadyForQA((✅ Ready for<br/>Final QA))

    style Merge fill:#22c55e,stroke:#16a34a,color:#fff
    style SubCheck fill:#eab308,stroke:#ca8a04,color:#000
    style FeatureCheck fill:#eab308,stroke:#ca8a04,color:#000
    style BackToCoding fill:#f59e0b,stroke:#d97706,color:#fff
    style BackToPlanning fill:#3b82f6,stroke:#2563eb,color:#fff
    style ReadyForQA fill:#22c55e,stroke:#16a34a,color:#fff
```

**Iteration Rules:**
- Keep commits focused and atomic
- Sub-tasks should be completable within 1-2 days
- Re-evaluate priorities after each sub-task completion

---

### Phase 4: Final QA & Deployment

Completed features undergo final validation through the CI/CD pipeline before merging.

```mermaid
flowchart TD
    Ready((✅ Feature<br/>Complete)) --> CICD
    
    subgraph CICD [⚡ CI/CD Pipeline]
        direction TB
        Build[🔨 Build] --> IntTest[🔬 Integration Testing]
        IntTest --> AutoTest[🤖 Automation Testing]
        AutoTest --> Deploy[📦 Deploy to Staging]
    end
    
    CICD --> DocsUpdate[📄 Update Documentation]
    DocsUpdate --> Ship((🚀 Merge to Develop))

    style Ready fill:#6366f1,stroke:#4338ca,color:#fff
    style Build fill:#06b6d4,stroke:#0891b2,color:#fff
    style IntTest fill:#06b6d4,stroke:#0891b2,color:#fff
    style AutoTest fill:#a855f7,stroke:#9333ea,color:#fff
    style Deploy fill:#14b8a6,stroke:#0d9488,color:#fff
    style DocsUpdate fill:#f97316,stroke:#ea580c,color:#fff
    style Ship fill:#22c55e,stroke:#16a34a,color:#fff
```

**Deployment Checklist:**
- All CI/CD pipeline stages must pass
- Integration tests validate cross-component behavior
- Automation tests cover critical user journeys
- Documentation updated for any API or behavior changes

---

## Consequences

### Positive
- Consistent quality through defined checkpoints
- Smaller, reviewable increments reduce risk
- AI-assisted review catches issues early
- Clear handoff points between team members

### Negative
- Additional overhead for small changes
- Requires discipline to follow all steps
- AI review tooling requires maintenance

### Mitigations
- For hotfixes, allow expedited path with post-merge review
- Automate checklist enforcement where possible
- Regular retrospectives to refine the process

---

## References

- [Git Flow Branching Model](https://nvie.com/posts/a-successful-git-branching-model/)
- [Continuous Integration Best Practices](https://martinfowler.com/articles/continuousIntegration.html)