/execute-issue

Implement a task from a GitHub issue

# Execute Issue

Implement a task from a GitHub issue, working on a shared feature branch with a single PR for the spec.

## Usage



## Prerequisites

1. Verify this is a Git repository with a GitHub remote
2. Parse the issue number from the argument
3. Fetch the issue and validate it has the `regent` label

## Phase 1: Fetch Issue Context

1. Get issue details:
   

2. Parse the spec name from labels (find label matching `spec:*`)

3. If no `regent` label, warn user this may not be a Regent-managed issue

4. Verify `.regent/{spec-name}/` exists locally
   - If not, ask user if they want t...