docs: update Learning Hub with recent Copilot CLI features (v1.0.23-v1.0.30) (#1421)

- copilot-configuration-basics.md: Add /ask, /env, /statusline commands
  and --mode/--autopilot/--plan startup flags
- automating-with-hooks.md: Document preToolUse modifiedArgs/updatedInput
  and additionalContext fields for modifying tool arguments
- understanding-mcp-servers.md: Add /mcp install registry section and
  note that type field is optional for remote MCP servers
- installing-and-using-plugins.md: Add copilot plugin marketplace update
  command and deprecation notice for repo/URL/path installs
- using-copilot-coding-agent.md: Add Remote Control section
  (replaces steering feature)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

website/src/content/docs/learning-hub/using-copilot-coding-agent.md

@@ -3,7 +3,7 @@ title: 'Using the Copilot Coding Agent'
 description: 'Learn how to use GitHub Copilot coding agent to autonomously work on issues, generate pull requests, and automate development tasks.'
 authors:
   - GitHub Copilot Learning Hub Team
-lastUpdated: 2026-03-25
+lastUpdated: 2026-04-16
 estimatedReadingTime: '12 minutes'
 tags:
   - coding-agent
@@ -334,6 +334,45 @@ This repository provides a curated collection of agents, skills, and hooks desig
 
 > **Example workflow**: Combine a `test-specialist` agent with a `database-migrations` skill and a linting hook. Assign an issue to the coding agent using the test-specialist agent — it will automatically pick up the migrations skill when relevant, and the hook ensures all code is formatted before completion.
 
+## Remote Control
+
+You can connect to and steer a running coding agent session from a local Copilot CLI terminal using **remote control**. This lets you observe the agent's progress, send follow-up prompts, and redirect its work in real time — without waiting for it to open a PR first.
+
+### Starting a Remote-Controlled Session
+
+Launch a session that registers with GitHub for remote access:
+
+```bash
+copilot --remote
+```
+
+Or open a remote control tab from inside an existing session:
+
+```
+/remote
+```
+
+The **Remote** tab in the CLI shows all active coding agent tasks from the repository. Select a task to connect and begin sending steering messages.
+
+### Resuming from the Session Picker
+
+Remote sessions also appear in the `--resume` picker, so you can reconnect to a coding agent session you were previously controlling without needing to know the session ID:
+
+```bash
+copilot --resume
+```
+
+### Why Use Remote Control?
+
+| Scenario | Benefit |
+|----------|---------|
+| Long-running tasks | Monitor progress without waiting for the final PR |
+| Mid-course corrections | Redirect the agent if it heads in the wrong direction |
+| Interactive refinement | Provide clarification and feedback as the agent works |
+| No PR required | You can steer tasks that haven't yet opened a pull request |
+
+> **Note**: Remote control replaces the earlier "steering" feature. If you see references to steering in older documentation, remote control is the updated equivalent.
+
 ## Hooks and the Coding Agent
 
 Hooks are especially valuable with the coding agent because they provide deterministic guardrails for autonomous work: