Hi @xiangjishi1983-commits! Here is an official product-level breakdown answering your four questions regarding Copilot Skills, GitHub Pro, and private repository workflows:

1. GitHub Pro vs. GitHub Copilot

GitHub Pro and GitHub Copilot are distinct product subscriptions:

• GitHub Pro provides core platform features: unlimited private repositories, advanced branch protection, wiki in private repos, and 3,000 monthly GitHub Actions minutes. It does not include Copilot licensing or grant private-repo Copilot memory extensions.
• Access to GitHub Copilot requires a Copilot Individual (or Copilot Pro), Copilot Business, or Copilot Enterprise subscription.
• Enterprise-managed context and knowledge bases (such as indexing across private org repositories) are specifically part of Copilot Enterprise.

2. Runtime for the remember Skill

A Copilot Skill is an instruction and contract specification, not a self-executing server runtime:

• Skills are executed by an agent runtime—most commonly within VS Code Copilot Chat, JetBrains, or a custom Copilot Extension service.
• The Skill bundle provides tool definitions and formatting prompts, but file reading, validation, and persistent storage must be implemented by the client host or an external backend.

3. GitHub-Hosted Validation Against Private Repositories

The supported GitHub-hosted mechanism for running automated checks or state validation without third-party servers is GitHub Actions:

• A workflow triggered on workflow_dispatch, pull_request, or repository dispatch runs in an isolated runner VM.
• Access is governed strictly by the repository's GITHUB_TOKEN scopes (permissions: contents: read/write).
• For auditability, memory candidate proposals can be checked in via a Pull Request, where GitHub's native branch protections and required approvals act as the security boundary.

4. What You Must Build vs. What GitHub Provides

GitHub Pro manages account features but lacks AI capabilities, which require a Copilot subscription and organization policies. Copilot skills are static instruction bundles executed through supported clients like VS Code or the Copilot CLI without requiring external microservices. GitHub Actions provides a hosted environment for validation, while GitHub ensures strict repository isolation and protects private code from training global models. Ultimately, GitHub supplies the platform features, runtime interfaces, memory mechanisms, and CI infrastructure, whereas users are responsible for authoring skill content, configuring custom workflows, setting repository permissions, and managing validation rules.

Run project skills with Copilot cloud agent, using .github/skills/; no external runtime is required.
Copilot Memory is available on paid Copilot plans.
It can retain facts from unmerged PRs, so it isn't an approval-gated memory store.
For your own memory files, GitHub Pro supports required PR reviews in private personal repositories.