[FEAT] Integrate Forge Gas Snapshot Diff Checker in Github Actions

[mijinummi]

Labels: good-first-issue, ci-cd, gas-optimization, gasguard
Difficulty: Easy
Module: .github/workflows/

---

🧠 Concept

Set up a GitHub Actions workflow that automatically compares gas snapshots generated by forge snapshot on pull requests against the baseline branch.

⚠️ Problem

Developers can introduce subtle gas regressions during refactoring without noticing unless gas diffs are surfaced directly in pull request reviews.

📁 Implementation Scope

• .github/workflows/gas-diff.yml
• scripts/compare-gas-snapshots.sh

🛠️ Requirements

1. Run forge snapshot --check on pull request triggers.
2. Generate a markdown table highlighting positive and negative gas deltas per test case.
3. Post the summary table directly as a pull request comment.

🎯 Acceptance Criteria

• Automated workflow posts clean gas diff markdown reports on pull requests.
• Non-zero gas increases flag a status warning on the commit build.

[odiliflash-ops]

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[codefather2026]

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