Add golden test for gh aw --help output

[Copilot]

Adds snapshot testing to detect unintended changes to CLI help output.

Changes

• cmd/gh-aw/help_output_test.go: Integration test comparing gh aw --help output against golden file

  • Captures actual output and diffs against baseline
  • UPDATE_GOLDEN=1 environment variable updates snapshot
  • Clear diff output on mismatch

• cmd/gh-aw/testdata/help_output.golden.txt: Baseline snapshot

• CONTRIBUTING.md: Documents golden file update workflow

Usage

Update golden files after intentional help text changes:

UPDATE_GOLDEN=1 go test -v -tags integration -run TestHelpOutputGolden ./cmd/gh-aw

Test fails in CI if help output drifts, showing exact differences.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/user
  • Triggering command: /usr/bin/gh gh api user --jq .login -unreachable=false /tmp/go-build4031923621/b255/vet--log-format /opt/hostedtoolcache/go/1.25.0/xjson (http block)
  • Triggering command: /usr/bin/gh gh api user --jq .login /ref/tags/v8 g/timeutil/format_test.go by/213d854ce4107514e8e0f3331ef6c834d0e6d04bd343d9469b481c3facb8da30/log.json (http block)
  • Triggering command: /usr/bin/gh gh api user --jq .login 56/sanitize_output.js c 3a14e89ff37ddbaf3357e37bebcb55cd07b/log.json - efer <8320933+mnapi (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add golden test: gh aw --help</issue_title>
<issue_description>## Summary
Add a snapshot test to detect changes in gh aw --help output.

Implementation Notes

• Capture baseline snapshot
• Diff against snapshot in CI
• Provide update instructions for contributors

Success Criteria

• Help output drift is automatically caught in PRs
  </issue_description>

Comments on the Issue (you are @copilot in this section)

@pelikhan Sounds good assign to copilot.

• Fixes githubnext/gh-aw-planning#10

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[pelikhan]

This test will fail on every change to the help strings.