Add support for custom command, args, and env in sandbox.agent for both AWF and SRT

[Copilot]

• Extend custom fields (command, args, env) to work with SRT
  • Update struct comments to clarify fields work for both AWF and SRT
  • Update JSON schema documentation to mention both AWF and SRT
  • Skip SRT installation when custom command is specified
  • Support custom command in SRT execution
  • Add tests for SRT with custom fields
  • Update example workflow to document both AWF and SRT usage
• Move example workflow to test workflows folder (pkg/cli/workflows/)

Original prompt

Update the "sandbox.agent" frontmatter definition to allow specifying an object to configure awf or srt

sandbox:
   agent:
     id: awf
     command: "..."
     args: ["..", ".."]
     env:
       ...

The command replaces the download of the awf binary, the args are added to the command args, the env is set on the step

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[pelikhan]

@copilot custom fields are also applicable to srt

[Copilot]

@copilot custom fields are also applicable to srt

Done! Extended custom fields (command, args, env) to work with both AWF and SRT.

Changes in commit d77da32:

• Updated struct and schema docs to clarify fields apply to both AWF and SRT
• Skip SRT installation when custom command is specified (similar to AWF)
• Support custom command in SRT execution with args appended
• Custom env variables already worked for both (shared code path)
• Added test for SRT with custom fields
• Updated example workflow to document both AWF and SRT usage

Example SRT configuration:

features:
  sandbox-runtime: true
sandbox:
  agent:
    id: srt
    command: "custom-srt-wrapper"
    args: ["--custom-arg"]
    env:
      SRT_DEBUG: "true"