[xmhubj]

Summary

Migrates 5 composite actions from flagos-ai/FlagGems/.github/actions/ to flagos-ai/FlagOps/actions/ for organization-level sharing and generalization. Adds READMEs for each action and updates the main README.

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Actions added

Action	Source	Change
checkout-retry	FlagGems direct port	No change
checkout-pr	FlagGems + generalized	Added gh-version + gh-mirror-url parameters
robust-checkout	FlagGems direct port	No change
setup-project	Generalized from setup-flaggems	setup-script, vllm-version, vllm-backend-prefix, layer1-packages-pattern, gpu-check-script parameterized
run-ondemand-test	Generalized from ondemand-test	FlagGems-specific inputs replaced by test-command + artifact-name + comment-message-id

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Analysis & optimization notes

Issues found in FlagGems source

1. checkout-retry pins actions/checkout@de0fac2e...# v6.0.2 — there is no public actions/checkout v6; this SHA should be verified or updated to a known stable release. Carried over as-is pending verification.

2. setup-flaggems hardcodes VLLM_VERSION=0.21.0 — moved to the vllm-version input so callers can upgrade without touching the shared action.

3. checkout-pr hardcodes the internal CDN URL — now a gh-mirror-url parameter with the CDN as default; consumers outside the internal network can override it.

4. ondemand-test embeds FlagGems tool paths (tools/run_tests.py, tools/psum_text) — moved into the caller's test-command, making the action project-agnostic.

5. setup-flaggems uses snake_case input gpu_check_script — renamed to gpu-check-script (kebab-case) to match the rest of the org's convention.

Org-level sharing assessment

• checkout-retry and robust-checkout: ready for immediate reuse with no project-specific assumptions.
• checkout-pr: ready for reuse; the mirror override makes it viable for teams outside the internal CDN.
• setup-project: reusable for any project following a setup.sh <backend> convention. The vllm layer-integrity logic is opt-in.
• run-ondemand-test: fully generic — any project can pass its own test command. The artifact + PR comment plumbing is stateless.

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Next steps

A follow-up PR to flagos-ai/FlagGems will update command.yaml and backend-test.yaml to reference these shared actions instead of the local copies.