[NGI Commons] Milestone 4 — GitHub Actions prototype

[safal207]

Goal

Provide a CI integration path for evidence gates in open-source repositories.

Deliverables

• Reusable workflow prototype.
• CI evidence gate example.
• Sample policy file.
• Documentation for integration into a repository.

Acceptance checks

• Demo workflow can run in GitHub Actions.
• Failing evidence causes a clear CI failure.
• Passing evidence produces a clear CI success.
• Limitations are documented.

Grant context

Application: 2026-06-133
Fund: NGI Zero Commons / Commons Fund
Reviewer docs: docs/BUDGET_AND_MILESTONES_COMMONS.md