docs: update Learning Hub for Copilot CLI v1.0.15–v1.0.16 changes (#1273)

- Add PermissionRequest hook event to automating-with-hooks.md with
  practical CI example (new in v1.0.16)
- Add Ctrl+Q / Ctrl+Enter queue shortcut note to copilot-configuration-basics.md
  (Ctrl+D no longer queues as of v1.0.15)
- Add extraKnownMarketplaces config setting to installing-and-using-plugins.md
  (old 'marketplaces' setting removed in v1.0.16)
- Update lastUpdated dates on all three files

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/automating-with-hooks.md

@@ -3,7 +3,7 @@ title: 'Automating with Hooks'
 description: 'Learn how to use hooks to automate lifecycle events like formatting, linting, and governance checks during Copilot agent sessions.'
 authors:
   - GitHub Copilot Learning Hub Team
-lastUpdated: 2026-04-01
+lastUpdated: 2026-04-02
 estimatedReadingTime: '8 minutes'
 tags:
   - hooks
@@ -93,6 +93,7 @@ Hooks can trigger on several lifecycle events:
 | `preToolUse` | Before the agent uses any tool (e.g., `bash`, `edit`) | **Approve or deny** tool executions, block dangerous commands, enforce security policies |
 | `postToolUse` | After a tool **successfully** completes execution | Log results, track usage, format code after edits |
 | `postToolUseFailure` | When a tool call **fails with an error** | Log errors for debugging, send failure alerts, track error patterns |
+| `PermissionRequest` | When the CLI shows a **permission prompt** to the user | Programmatically approve or deny permission requests, enable auto-approval in CI/headless environments |
 | `agentStop` | Main agent finishes responding to a prompt | Run final linters/formatters, validate complete changes |
 | `preCompact` | Before the agent compacts its context window | Save a snapshot, log compaction event, run summary scripts |
 | `subagentStart` | A subagent is spawned by the main agent | Inject additional context into the subagent's prompt, log subagent launches |
@@ -207,6 +208,42 @@ automatically before the agent commits changes.
 
 ## Practical Examples
 
+### Auto-Approve Permissions in CI with PermissionRequest
+
+The `PermissionRequest` hook fires when the CLI shows a permission prompt to the user — for example, when the agent wants to run a shell command for the first time. Unlike `preToolUse` (which can block specific tool *calls*), `PermissionRequest` intercepts the permission approval UI itself, making it ideal for **headless and CI environments** where no one is available to click "Allow".
+
+When your hook script exits with code `0`, the permission request is **approved**. Exit with a non-zero code to **deny** it (the user will still see the prompt).
+
+```json
+{
+  "version": 1,
+  "hooks": {
+    "PermissionRequest": [
+      {
+        "type": "command",
+        "bash": "./scripts/ci-permission-policy.sh",
+        "cwd": ".",
+        "timeoutSec": 5
+      }
+    ]
+  }
+}
+```
+
+Example policy script that auto-approves all permissions when running in CI:
+
+```bash
+#!/usr/bin/env bash
+# scripts/ci-permission-policy.sh
+# Auto-approve all permission requests in CI environments
+if [ "${CI}" = "true" ]; then
+  exit 0   # approve
+fi
+exit 1     # deny (let the user decide interactively)
+```
+
+> **Security note**: Use `PermissionRequest` hooks carefully. Blanket auto-approval in non-CI environments removes an important safety check. Scope the auto-approval logic precisely (e.g., only in CI, only for specific tools).
+
 ### Handling Tool Failures with postToolUseFailure
 
 The `postToolUseFailure` hook fires when a tool call fails with an error — distinct from `postToolUse`, which only fires on success. Use it to log errors, send failure alerts, or implement retry logic:

website/src/content/docs/learning-hub/copilot-configuration-basics.md

@@ -3,7 +3,7 @@ title: 'Copilot Configuration Basics'
 description: 'Learn how to configure GitHub Copilot at user, workspace, and repository levels to optimize your AI-assisted development experience.'
 authors:
   - GitHub Copilot Learning Hub Team
-lastUpdated: 2026-04-01
+lastUpdated: 2026-04-02
 estimatedReadingTime: '10 minutes'
 tags:
   - configuration
@@ -457,6 +457,8 @@ The `/share html` command exports the current session — including conversation
 
 The exported file contains everything needed to view the session without a network connection and can be shared with teammates or stored for later reference. This complements `/share` (which shares via URL) for cases where an offline or attached format is preferred.
 
+**Keyboard shortcuts for queuing messages**: Use **Ctrl+Q** or **Ctrl+Enter** to queue a message (send it while the agent is still working). **Ctrl+D** no longer queues messages — it now has its default terminal behavior. If you have muscle memory for Ctrl+D queuing, switch to Ctrl+Q.
+
 The `/allow-all` command (also accessible as `/yolo`) enables autopilot mode, where the agent runs all tools without asking for confirmation. It now supports `on`, `off`, and `show` subcommands:
 
 ```

website/src/content/docs/learning-hub/installing-and-using-plugins.md

@@ -3,7 +3,7 @@ title: 'Installing and Using Plugins'
 description: 'Learn how to find, install, and manage plugins that extend GitHub Copilot CLI with reusable agents, skills, hooks, and integrations.'
 authors:
   - GitHub Copilot Learning Hub Team
-lastUpdated: 2026-03-30
+lastUpdated: 2026-04-02
 estimatedReadingTime: '8 minutes'
 tags:
   - plugins
@@ -142,6 +142,23 @@ Or from a local path:
 copilot plugin marketplace add /path/to/local-marketplace
 ```
 
+### Sharing Marketplace Registrations Across a Team
+
+To automatically register an additional marketplace for everyone working in a repository, add an `extraKnownMarketplaces` entry to your `.github/copilot-settings.json` (or `config.json`):
+
+```json
+{
+  "extraKnownMarketplaces": [
+    {
+      "name": "my-org-plugins",
+      "source": "my-org/internal-plugins"
+    }
+  ]
+}
+```
+
+With this in place, team members automatically get the `my-org-plugins` marketplace available without running a separate `marketplace add` command. This replaces the older `marketplaces` setting, which was removed in v1.0.16.
+
 ## Installing Plugins
 
 ### From Copilot CLI