feature-builder

Feature Builder Skill

Zero-to-feature orchestration pipeline for mobile development. Transforms a feature description into production-ready code through six structured phases with automated agent coordination, build verification, and quality enforcement.

Overview

The feature builder runs a deterministic six-phase pipeline:

Phase 1: Planning          Phase 2: Implementation       Phase 3: Testing
 ┌────────────┐             ┌────────────────┐            ┌──────────────┐
 │ Plan + Arch│────────────▶│ 5-Agent DAG    │───────────▶│ 3 Test Agents│
 │   Review   │             │  Build Code    │            │  in Parallel │
 └────────────┘             └────────────────┘            └──────────────┘
        │                                                        │
        ▼                                                        ▼
Phase 6: Verification      Phase 5: Quality Gate          Phase 4: Build & Fix
 ┌────────────┐             ┌────────────────┐            ┌──────────────┐
 │ pass@k=3   │◀────────────│ 3 Reviewers    │◀───────────│ Compile/Test │
 │ Coverage   │             │  in Parallel   │            │  Fix Loop    │
 └────────────┘             └────────────────┘            └──────────────┘

Entry Points:

• /feature-build <description> -- Full pipeline from planning to verification
• /feature-build --from-phase=<N> -- Resume from a specific phase
• /feature-build --skip-phase=<N> -- Skip a phase (e.g., skip quality gate for prototypes)
• Individual phase commands for targeted execution

Supported Platforms: Android, iOS, KMP (auto-detected or explicit via --platform)

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Usage

Full Pipeline

# Auto-detect platform, run all phases
/feature-build "User authentication with biometric login"

# Explicit platform
/feature-build --platform=android "Shopping cart checkout flow"
/feature-build --platform=ios "Push notification preferences"
/feature-build --platform=kmp "Offline-first data sync"

Partial Execution