Fix PHP Agent SDK split publish

[DanielButler1]

Fix two release-path failures exposed by the first Agent SDK publication run.

• push the PHP subtree commit to the fully qualified refs/heads/main destination required when creating an empty split repository
• skip optional live Agent SDK smoke tests when the Phaseo API-key secret is absent, without exposing the secret to unrelated setup steps
• retain exact-version/tag checks so rerunning skips Python, Ruby, Go, NuGet, and the already-created PHP monorepo tag

Validation:

• git diff --check
• PHP failure reproduced from release run 30199423102 and corrected using Git's explicit suggested refspec
• public clean installs verified for PyPI, NuGet, RubyGems, and Go at 0.2.0
• original main CI failure traced to an empty PHASEO_API_KEY with live-smoke opt-in enabled

Created with Codex

Summary by CodeRabbit

• Chores
  • Live GPT 5.6 Luna Agent SDK smoke tests now run only when the required API credentials are available.
  • Updated PHP Agent SDK publishing to target the main branch explicitly, improving release workflow reliability.

[coderabbitai]

📝 Walkthrough

Walkthrough

The CI workflow now skips live smoke tests when the API key is unavailable. The PHP SDK publish workflow now pushes split commits explicitly to the main branch ref.

Changes

CI live smoke gating

Layer / File(s)	Summary
Credential-gated live smoke test .github/workflows/ci.yml	Adds a credential availability check and requires it before running the main-branch live smoke step.

PHP SDK publishing

Layer / File(s)	Summary
Explicit split-repository branch ref .github/workflows/publish-agent-sdks.yml	Pushes the split commit to refs/heads/main.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• phaseoteam/Phaseo#1269: Modifies the same PHP SDK publishing workflow and split-repository push logic.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the main PHP Agent SDK split publish workflow change and is specific enough for history scanning.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/php-agent-sdk-split-ref-20260726

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[github-actions]

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Commit: fb85201