New Feature Planner Agent
Plans new feature implementations by analyzing your codebase, designing architecture, and creating actionable task lists. Build features right the first time.
The "Just Start Coding" Trap
Teams often jump straight into implementation without proper planning:
- "We'll figure it out as we go" — then discover a blocker on day 3
- "It's just a simple feature" — that touches 15 files and breaks 3 others
- "The PM gave us requirements" — but not how it fits the existing architecture
- "Senior devs know the codebase" — and they're all busy on other projects
The result? Rework. Scope creep. Architectural drift. Features that don't integrate well with existing code.
How the Agent Works
Requirements Analysis
Clarifies what needs to be built and why.
- → Understands the business goal and user story
- → Identifies constraints and edge cases
- → Asks clarifying questions before designing
Codebase Audit
Finds related patterns and reusable components.
- → Identifies similar features in the codebase
- → Finds reusable UI components and helpers
- → Maps existing service objects and patterns
Architecture Design
Designs the technical solution following existing patterns.
- → Designs data model: new tables, associations, validations
- → Plans backend: controllers, services, jobs, API endpoints
- → Plans frontend: views, Stimulus controllers, Turbo frames
Task Breakdown
Creates ordered, actionable implementation steps.
- → Breaks work into small, mergeable PRs
- → Orders tasks to minimize blocked work
- → Identifies which tasks can be parallelized
Risk Assessment
Identifies potential blockers and mitigation strategies.
- → Flags complex parts that need senior review
- → Identifies external dependencies and API integrations
- → Delivers a complete implementation plan your team can execute.
What the Plan Includes
Data Model
- • New models/tables needed
- • Associations with existing models
- • Required validations and constraints
- • Migration strategy
Backend
- • Controller actions and routes
- • Service objects and business logic
- • Background jobs
- • API endpoints
Frontend
- • Views and partials
- • Stimulus controllers
- • Turbo frames/streams
- • UI component reuse
Testing
- • Unit tests needed
- • Integration tests
- • Feature specs
- • Edge case coverage
Safety Guarantees
Pattern Consistency
Plans follow existing codebase conventions. No alien patterns.
Minimal Scope
Plans exactly what's needed. No gold-plating or over-engineering.
Authorization Considered
Plans include permission checks and security considerations.
Error States Planned
Includes error handling and edge cases from the start.
Migration Safety
Database changes designed for zero-downtime deployment.
Test Strategy Included
Every plan includes what tests to write and when.
What This Is NOT
- ✗ Not a product spec. This is technical architecture, not requirements gathering.
- ✗ Not implementation. Delivers a plan, not the code itself.
- ✗ Not greenfield design. Plans integrate with your existing architecture.
- ✗ Not over-engineering. Plans the simplest solution that works.
Typical Results
Ready to Plan Your Next Feature?
Start with a $1,500 audit. Get a complete implementation plan for your most important upcoming feature.