[plan] Parallelize setup operations in agent job

[github-actions]

Objective

Parallelize independent setup operations to reduce sequential execution time by 8-12 seconds.

Context

Currently, Stage 2 and Stage 3 of the agent job run sequentially, but many operations are independent:

• Stage 2: Dependencies Installation (8.8s)
  • AWF binary install (0.8s)
  • Claude Code CLI install (3.1s)
• Stage 3: Container & Network Setup (11.4s)
  • Docker image downloads
  • MCP server config generation
  • Safe outputs config

Impact: Save 8-12s (5-8% of agent job time)

Approach

1. Identify all independent operations in setup stages
2. Use bash background jobs to run parallel operations
3. Use wait to synchronize before dependent steps
4. Ensure error handling works with parallel execution

Example Implementation

# Run independent operations in parallel
npm install -g `@anthropic-ai/claude-code`@2.1.22 &
docker pull ghcr.io/github/github-mcp-server:v0.30.2 &
docker pull ghcr.io/githubnext/gh-aw-mcpg:v0.0.84 &
curl -L -o awf https://github.com/githubnext/gh-aw/releases/download/v0.11.2/awf &
wait  # Wait for all background jobs to complete

# Continue with dependent operations
chmod +x awf
./awf --version

Files to Modify

• actions/setup/ scripts that handle dependency installation
• Workflow template generation in pkg/workflow/
• Any shell scripts managing container initialization

Acceptance Criteria

• Independent setup operations run in parallel
• Total setup time reduced by at least 8 seconds
• Error handling preserves exit codes from background jobs
• Workflow logs clearly show parallel execution progress
• No race conditions or resource conflicts introduced
  Related to Running goal: Improve and optimize time to start of coding agent and overall workflow time  #12543

AI generated by Plan Command for #12543

[pelikhan]

Ignore MCP and safe output config generation steps, they are not network bound.