[bot] Document CLI sandbox policy, non-GitHub git auth, and tgrep search (v1.0.79)

[github-actions]

Summary

Checked recent GitHub Copilot updates (CLI changelog up to v1.0.79, released 2026-08-10) against the Learning Hub. Note: github.blog, code.visualstudio.com, and the community guide site were unreachable from this sandboxed environment (network policy blocks non-GitHub domains), so this update is based on the github/copilot-cli repository changelog and releases only, cross-referenced with the existing Learning Hub content in website/src/content/docs/learning-hub/.

What was found

The Learning Hub (particularly copilot-configuration-basics.md) was already remarkably current, covering most v1.0.7x–v1.0.79 features (worktrees, autopilot modes, model picker, plugin marketplaces, sandbox settings, etc.). A few smaller v1.0.79 items were not yet documented:

• /sandbox policy command showing effective sandbox paths, denials, and network access
• Sandboxed git now authenticating to Azure DevOps, GitHub Enterprise Server, GitLab, and other non-GitHub remotes
• Automatic use of tgrep (trigram-indexed search) instead of ripgrep for faster search in large monorepos

Sections updated

• website/src/content/docs/learning-hub/copilot-configuration-basics.md — added three short entries to the existing CLI sandbox/search documentation block (no structural changes, no new pages needed).

cli-for-beginners/ pages were intentionally left untouched per instructions.

Sources

• https://github.com/github/copilot-cli/blob/main/changelog.md (v1.0.79, v1.0.78)
• https://github.com/github/copilot-cli releases (latest: v1.0.79)

Limitations

Could not access github.blog, code.visualstudio.com, or nishanil.github.io due to sandbox network restrictions (only github.com/api.github.com/raw content reachable), so those sources were not reviewed in this pass.

Warning

Firewall blocked 3 domains

The following domains were blocked by the firewall during workflow execution:

• code.visualstudio.com
• github.blog
• nishanil.github.io

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "code.visualstudio.com"
    - "github.blog"
    - "nishanil.github.io"

See Network Configuration for more information.

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