docs: update course content for CLI v1.0.15-v1.0.17 features

- Add /share html command to ch01 and ch02 (v1.0.15)
- Document built-in skills shipped with CLI to ch05 (v1.0.17)
- Add /mcp reload and /mcp auth commands to ch06 (v1.0.15/v1.0.16)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: DanWahlin

01-setup-and-first-steps/README.md

@@ -431,7 +431,7 @@ That's it for getting started! As you become comfortable, you can explore additi
 | `/rewind` | Open a timeline picker to roll back to any earlier point in the conversation |
 | `/usage` | Display session usage metrics and statistics |
 | `/session` | Show session info and workspace summary |
-| `/share` | Export session as markdown file or GitHub gist |
+| `/share` | Export session as markdown file, GitHub gist, or self-contained HTML file |
 
 ### Help and Feedback
 

02-context-conversations/README.md

@@ -470,6 +470,9 @@ copilot
 
 > /share gist
 # Creates a GitHub gist with the session
+
+> /share html ./my-session.html
+# Exports session as a self-contained interactive HTML file
 ```
 
 </details>

05-skills/README.md

@@ -267,17 +267,20 @@ Build your own skills from SKILL.md files.
 
 ## Skill Locations
 
-Skills are stored in `.github/skills/` (project-specific) or `~/.copilot/skills/` (user level).
+Skills are stored in `.github/skills/` (project-specific), `~/.copilot/skills/` (user level), or come **built-in** with the CLI itself.
 
 ### How Copilot Finds Skills
 
 Copilot automatically scans these locations for skills:
 
 | Location | Scope |
 |----------|-------|
+| Built-in (ships with CLI) | Available to everyone, no setup needed |
 | `.github/skills/` | Project-specific (shared with team via git) |
 | `~/.copilot/skills/` | User-specific (your personal skills) |
 
+> 💡 **Built-in skills**: Starting with v1.0.17, GitHub Copilot CLI ships with skills pre-installed. For example, the `customizing-copilot-cloud-agents-environment` skill provides a guide for setting up the Copilot cloud agent environment. Run `/skills list` to see all available skills, including built-in ones.
+
 ### Skill Structure
 
 Each skill lives in its own folder with a `SKILL.md` file. You can optionally include scripts, examples, or other resources:
@@ -841,7 +844,7 @@ Run `/skills reload` after creating or editing skills to ensure changes are pick
 1. **Skills are automatic**: Copilot loads them when your prompt matches the skill's description
 2. **Direct invocation**: You can also invoke skills directly with `/skill-name` as a slash command
 3. **SKILL.md format**: YAML frontmatter (name, description, optional license) plus markdown instructions
-4. **Location matters**: `.github/skills/` for project/team sharing, `~/.copilot/skills/` for personal use
+4. **Location matters**: Built-in skills ship with the CLI; `.github/skills/` for project/team sharing; `~/.copilot/skills/` for personal use
 5. **Description is key**: Write descriptions that match how you naturally ask questions
 
 > 📋 **Quick Reference**: See the [GitHub Copilot CLI command reference](https://docs.github.com/en/copilot/reference/cli-command-reference) for a complete list of commands and shortcuts.

06-mcp-servers/README.md

@@ -896,6 +896,8 @@ Beyond `/mcp show`, there are several other commands for managing your MCP serve
 | `/mcp enable <server-name>` | Enable a disabled server |
 | `/mcp disable <server-name>` | Temporarily disable a server |
 | `/mcp delete <server-name>` | Remove a server permanently |
+| `/mcp reload` | Reload MCP server configuration without restarting Copilot |
+| `/mcp auth <server-name>` | Authenticate or re-authenticate an MCP server that uses OAuth |
 
 For most of this course, `/mcp show` is all you need. The other commands become useful as you manage more servers over time.