/harness-merge-all

Merge all PRs, close issues, delete branches (dependency order)

Merge all open PRs, close related issues, and delete branches in dependency order:

Arguments: $ARGUMENTS (optional - specific version like v1.2.0, defaults to auto-versioning)

Requires GitHub MCP to be configured.

## Phase 1: Gather State

1. Gather state:
   - List all open PRs for this repository
   - List all open issues with "feature" label
   - Read feature-list.json for linked issue/PR numbers
   - Get latest version tag from git: `git describe --tags --abbrev=0`

## Phase 2: Build Dependency Graph

2. Build dependency graph:
   - For each PR, check if its base branch is another fe...