subagent-driven-development

# Subagent-Driven Development

Create and execute plan by dispatching fresh subagent per task or issue, with code and output review after each or batch of tasks.

**Core principle:** Fresh subagent per task + review between or after tasks = high quality, fast iteration.

Executing Plans through agents:

- Same session (no context switch)
- Fresh subagent per task (no context pollution)
- Code review after each or batch of task (catch issues early)
- Faster iteration (no human-in-loop between tasks)

## Supported types of execution

### Sequential Execution

When you have a tasks or issues that are related to each other, and they need to be executed in order, investigating or modifying them sequentially is the best way to go.

Dispatch one agent per task or issue. Let it work sequentially. Review the output and code after each task or issue.

**When to use:**

- Tasks are tightly coupled
- Tasks should be executed in order

### Parallel Execution

When you have multiple unrelated tasks or issues (different files, different subsystems, different bugs), investigatin or modifying them sequentially wastes time. Each task or investigation is independent and can happen in parallel.

Dispatch one agent per independent problem domain. Let them work concurrently.

**When to use:**

- Tasks are mostly independent
- Overral review can be done after all tasks are completed

## Sequential Execution Process

### 1. Load Plan

Read plan file, create TodoWrite with all tasks.

### 2. Execute Task with Subagent

For each task:

**Dispatch fresh subagent:**

```
Task tool (general-purpose):
  description: "Implement Task N: [task name]"
  prompt: |
    You are implementing Task N from [plan-file].

    Read that task carefully. Your job is to:
    1. Implement exactly what the task specifies
    2. Write tests (following TDD if task says to)
    3. Verify implementation works
    4. Commit your work
    5. Report back

    Work from: [directory]

    Report: What you implemented, what