test(ci): exercise unified CI policy with GPT-2

[chaofengw-nv]

Background

Live end-to-end validation of Community CI after #1268 retired the standalone CPU workflow and paused automatic GPU execution. No functional change; this PR exists only to exercise the current pull-request policy with a clean families/ change.

Exit Criteria

• One Community CI workflow fires automatically for the rebased head; the retired standalone Community CPU workflow does not run.
• Community CPU / Required succeeds before GPU authorization and impact classification.
• GPU impact selection chooses only gpt2 and reports that automatic GPU execution is disabled.
• GPU reservation, execution, cleanup, and result publication remain skipped, with GPU validation outside the merge gate.

Implementation

Add a comment-only annotation to families/gpt2/support.py. Model support, runtime behavior, validation criteria, and public interfaces are unchanged.

Change categories

• CI or developer tooling

Validation

Commands and Results

• python3 -m ruff check families/gpt2/support.py: passed.
• python3 -m tools.community_ci impact --base github/main: passed; selected only gpt2 with family scope.
• python3 -m tools.test_impact --base github/main --head HEAD: passed; selected only gpt2 and requested Core tests.
• git diff --check github/main...HEAD: passed.

Hardware, Environment, and Revisions

Rebased onto github/main at f7c22339881f78e36ba138000e1dfa03f1943c07. Local validation used CPU-only tooling; the live pull-request workflow is the test target.

Not Run / Remaining Gaps

The optional manual GPU smoke is intentionally not requested. No GPU execution, model qualification, parity, or performance claim is made.

Contributor Self-Review

• I have completed a self-review of this change.

Notes For Future Readers

This PR is not intended to merge. Close it after the unified CPU gate, GPU impact classification, and disabled-execution policy are observed.

Risk level

• Low

Comment-only CI live-fire payload with no functional model change.

[coderabbitai]

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 296f366 and f5093fe.

📒 Files selected for processing (1)

• families/gpt2/support.py

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📝 Summary

Summary

Adds a three-line comment to families/gpt2/support.py to trigger the ordered Community CI pipeline.

The change does not alter GPT-2 support, runtime behavior, validation criteria, public interfaces, or dependencies. Live GPU validation remains pending.

Architecture impact

• Family-owned files: families/gpt2/support.py
• Shared surfaces: None changed.
• Dependency directions: None added.
• Affected consumers: Community CI only.
• Unresolved blast-radius questions: Confirm the live workflow produces the expected terminal GPU status and excludes unrelated model families.

Status: HUMAN REVIEW REQUIRED. Live workflow behavior remains unverified.

Walkthrough

The change adds a three-line comment to the GPT-2 support module. It documents an ordered Community CI live-fire payload. Runtime behavior remains unchanged.

Changes

GPT-2 support note

Layer / File(s)	Summary
Add CI payload comment families/gpt2/support.py	Documents the ordered Community CI live-fire payload and confirms that GPT-2 support and runtime behavior are unchanged.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 2c3b3

This documentation-only change introduces no production behavior or merge-blocking risk.

🚥 Pre-merge checks | ✅ 9

✅ Passed checks (9 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
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.
Family Ownership Boundary	✅ Passed	PASS. The authoritative diff changes only families/gpt2/support.py, adding comment lines 6-7. The base and head retain the same family_support import and GPT-2 describe declaration. No import, i…
Shared Semantic Neutrality	✅ Passed	PASS. The authoritative diff changes only families/gpt2/support.py, a family-owned support file, by adding three comment lines. The family_support declaration is unchanged after removing comments …
Benchmark Validation Integrity	✅ Passed	PASS: The review-scoped diff changes only families/gpt2/support.py by adding a comment. The family_support import, describe declaration, model type, task, and default task are unchanged. No benc…
Shared Change Blast Radius	✅ Passed	PASS: The authoritative diff changes only families/gpt2/support.py and adds three comments. The comments do not alter imports, declarations, runtime behavior, contracts, tooling, catalogs, or valida…
Title check	✅ Passed	The title clearly identifies a CI policy test using GPT-2. It matches the comment-only change and the stated objective to exercise unified Community CI.
Description check	✅ Passed	The description completes all required sections. It explains the purpose, exit criteria, implementation, change category, validation commands and results, environment, remaining gaps, self-review, not…

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