Claude Code 7-Phase Feature Development Workflow: A Complete Guide

Claude Code's feature-dev plugin automates full-stack feature implementation through a deterministic seven-step process driven by specialized AI agents that ensure every feature is well-understood, thoughtfully designed, and rigorously reviewed.

The feature-dev plugin in the anthropics/claude-code repository transforms informal feature requests into disciplined engineering workflows. This 7-phase approach for feature development workflow automation reduces rework by enforcing structured discovery, architecture design, and quality assurance before any code merges into the repository.

The Seven Phases of Feature Development

Claude Code orchestrates each feature through a predictable sequence from initial intent to final documentation. Every phase is encoded in the command definition at plugins/feature-dev/commands/feature-dev.md and documented in plugins/feature-dev/README.md.

Phase 1: Discovery

The workflow opens with intent capture. The system clarifies the problem statement, identifies constraints and requirements, and summarizes its understanding for developer confirmation. This ensures the AI comprehends the business goal before examining implementation details.

Phase 2: Codebase Exploration

Once the intent is clear, Claude Code launches 2-3 code-explorer agents in parallel to build a mental model of the surrounding code. Each agent investigates a different angle—similar features, high-level architecture, or UI patterns—and returns a curated list of 5-10 important files to read. This multi-perspective analysis prevents architectural mismatches and surfaces relevant abstractions early.

Phase 3: Clarifying Questions

Before generating designs, the system eliminates ambiguity by reviewing explorer findings against the original request. It generates a structured list of missing details covering edge cases, error handling, integration points, and performance needs, then waits for developer answers. This checkpoint prevents expensive rework during implementation.

Phase 4: Architecture Design

With requirements confirmed, Claude Code spawns 2-3 code-architect agents with distinct strategies—minimal change, clean architecture, or pragmatic balance. Each agent produces concrete implementation blueprints annotated with trade-offs. The system synthesizes these approaches, compares trade-offs, and recommends the best fit, asking the developer to pick an approach before proceeding.

Phase 5: Implementation

After explicit developer approval, the assistant reads all files highlighted in Phase 2 and writes the feature code adhering to the chosen architecture and project conventions. Throughout this phase, Claude Code continuously updates a Todo list to track progress and maintain visibility into remaining work.

Phase 6: Quality Review

The workflow enforces quality through three code-reviewer agents running in parallel, each focusing on a specific dimension: simplicity and DRY principles, bugs and functionality, and project conventions defined in CLAUDE.md. The system consolidates findings, surfaces high-severity issues with confidence scores, and lets the developer decide whether to fix immediately, defer, or proceed.

Phase 7: Summary

The final phase closes all todos and produces documentation summarizing what was built, key architectural decisions, modified files, and next steps. This creates a concise hand-off note for future reference and completes the audit trail.

How the Specialized Agents Cooperate

The 7-phase workflow relies on three distinct agent types defined in plugins/feature-dev/agents/. Each agent has a specialized prompt and output format encoded in its markdown definition file.

• code-explorer: Defined in plugins/feature-dev/agents/code-explorer.md, these agents scan the repository, trace execution paths, and surface key abstractions and file locations relevant to the feature.

• code-architect: Defined in plugins/feature-dev/agents/code-architect.md, these agents synthesize exploration insights into multiple design blueprints, each annotated with trade-offs and implementation strategies.

• code-reviewer: Defined in plugins/feature-dev/agents/code-reviewer.md, these agents enforce the project's style guide and report confidence-scored issues across correctness, readability, and compliance dimensions.

Together, they turn an informal request like "Add OAuth login" into a reproducible, multi-stage engineering process.

Running the Feature Development Workflow

Initiate the full 7-phase automation using the /feature-dev command:

# Start a full-feature workflow (Claude Code will drive all 7 phases)

/feature-dev Add rate limiting to API endpoints

During the session, the assistant will execute each phase sequentially:

1. Discovery – Ask clarifying questions like "What traffic volumes do you expect?"
2. Exploration – Run code-explorer agents returning files such as src/api/rateLimiter.ts and src/middleware/
3. Clarifying Questions – List open items like "Should the limit be per-IP or per-user?"
4. Architecture – Propose a "middleware-only" approach versus a "global service" approach
5. Implementation – After approval, write the new middleware, update tests, and commit
6. Quality Review – code-reviewer points out missing error-handlers and suggests DRY-friendly helpers
7. Summary – Post a concise report of changes and next steps

For manual exploration outside the full workflow, launch individual agents:

# Launch a code-explorer agent to understand current authentication flow

Launch code-explorer to trace how authentication works

Key Source Files and Implementation Details

The workflow automation is defined in the following locations within the anthropics/claude-code repository:

• plugins/feature-dev/README.md – Full description of the 7-phase workflow, philosophy, and best practices
• plugins/feature-dev/commands/feature-dev.md – Command definition encoding phase actions for Claude Code
• plugins/feature-dev/agents/code-explorer.md – Agent prompt and output format for exploration
• plugins/feature-dev/agents/code-architect.md – Agent prompt and output format for architecture design
• plugins/feature-dev/agents/code-reviewer.md – Agent prompt and output format for quality review
• CLAUDE.md – Project style guide referenced by the code-reviewer agents during Phase 6

Summary

• Claude Code's 7-phase feature development workflow automates the path from informal request to production-ready code through deterministic stages.
• Three specialized agents—code-explorer, code-architect, and code-reviewer—handle exploration, design, and validation in parallel where appropriate.
• The workflow enforces clarifying checkpoints before design and quality gates before completion, reducing technical debt and rework.
• All phase definitions and agent prompts are open-source in plugins/feature-dev/, making the automation transparent and customizable.
• Developers interact via the /feature-dev command, retaining approval authority at architecture selection and quality review stages.

Frequently Asked Questions

How do I start the 7-phase feature development workflow in Claude Code?

Invoke the /feature-dev command followed by your feature description. For example: /feature-dev Implement dark mode toggle. Claude Code will automatically proceed through Discovery, Exploration, Clarifying Questions, Architecture Design, Implementation, Quality Review, and Summary without additional commands.

What is the difference between code-explorer and code-architect agents?

The code-explorer agents investigate the existing codebase to locate relevant files and patterns, returning 5-10 key files to examine. The code-architect agents use those findings to generate implementation blueprints, proposing multiple architectural strategies (minimal change versus clean architecture) with explicit trade-off analysis for the developer to choose from.

Can I skip phases or run individual agents manually?

While the /feature-dev command orchestrates all seven phases sequentially, you can invoke individual agents manually using natural language commands like Launch code-explorer to analyze the payment processing module. However, skipping phases risks missing clarifying questions or architectural review, which the workflow is designed to enforce for quality assurance.

Where are the agent prompts and workflow definitions stored?

All definitions live in the plugins/feature-dev/ directory. The README at plugins/feature-dev/README.md documents the philosophy and phase details, while plugins/feature-dev/commands/feature-dev.md encodes the command logic. Individual agent prompts reside in plugins/feature-dev/agents/code-explorer.md, code-architect.md, and code-reviewer.md.

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