diff --git a/website/src/content/docs/learning-hub/building-custom-agents.md b/website/src/content/docs/learning-hub/building-custom-agents.md
index 2afcc0eac..4179e729b 100644
--- a/website/src/content/docs/learning-hub/building-custom-agents.md
+++ b/website/src/content/docs/learning-hub/building-custom-agents.md
@@ -3,7 +3,7 @@ title: 'Building Custom Agents'
 description: 'Learn how to create specialized GitHub Copilot agents with custom personas, tool integrations, and domain expertise.'
 authors:
   - GitHub Copilot Learning Hub Team
-lastUpdated: 2026-07-06
+lastUpdated: 2026-07-09
 estimatedReadingTime: '10 minutes'
 tags:
   - agents
@@ -256,6 +256,7 @@ The agent can then query your database, analyze query plans, and suggest optimiz
 |----------|-------------------|
 | Most demanding reasoning, security review | Claude Sonnet 5 *(v1.0.67+)* |
 | Complex reasoning, analysis | Claude Sonnet 4 |
+| Code generation, tool-driven agentic work | GPT-5.6 *(v1.0.70+)* |
 | Code generation, refactoring | GPT-4.1 |
 | Code-specialized tasks, large context | kimi-k2.7-code *(v1.0.68+)* |
 | Quick analysis, simple tasks | Claude Haiku or GPT-4.1-mini |
diff --git a/website/src/content/docs/learning-hub/copilot-configuration-basics.md b/website/src/content/docs/learning-hub/copilot-configuration-basics.md
index 607cab55a..029501f2d 100644
--- a/website/src/content/docs/learning-hub/copilot-configuration-basics.md
+++ b/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: 2026-07-07
+lastUpdated: 2026-07-09
 estimatedReadingTime: '10 minutes'
 tags:
   - configuration
@@ -207,6 +207,32 @@ In addition to repository-level skills, GitHub Copilot CLI supports **personal s
 
 The `~/.agents/skills/` path aligns with the VS Code GitHub Copilot for Azure extension's default skill discovery path, while `~/.copilot/skills/` matches the Copilot CLI configuration directory. Both are supported for personal skills.
 
+### Pinning Model and Effort via `.github/copilot/settings.json`
+
+*(v1.0.70+)* A **trusted repository** can pin the model, reasoning effort level, and context tier for all sessions working in that repository by adding a `.github/copilot/settings.json` file. This is a team governance feature that ensures everyone uses a consistent model configuration without relying on individual user settings:
+
+```json
+{
+  "model": "claude-sonnet-4",
+  "effortLevel": "high",
+  "contextTier": "full"
+}
+```
+
+**Supported fields**:
+
+| Field | Description | Example values |
+|-------|-------------|----------------|
+| `model` | The AI model to use for this repository | `"claude-sonnet-4"`, `"gpt-4.1"`, `"claude-sonnet-5"` |
+| `effortLevel` | Reasoning effort level | `"low"`, `"medium"`, `"high"` |
+| `contextTier` | How much context to include | `"default"`, `"full"` |
+
+In addition to model and effort settings, this file can also extend the URL, MCP server, and skill deny lists, allowing organizations to enforce access restrictions at the repository level.
+
+**Why use this**: Pin a model when your team has agreed on the right cost/quality tradeoff for a project. Pin a high effort level for codebases where mistakes are expensive. Deny lists let you block specific MCP servers or URLs that aren't appropriate for a given project's security posture.
+
+> **Trust requirement**: The repository must be explicitly trusted by the user for these settings to take effect. This prevents untrusted repositories from changing your model or access restrictions without your knowledge.
+
 ### Custom Agents
 
 Agents are specialized assistants for specific workflows. Place agent definition files in `.github/agents/`.
@@ -592,6 +618,14 @@ The `/ask` command lets you ask a quick question without affecting your conversa
 /ask What does the `retry` utility in src/utils do?
 ```
 
+The `/refine` command *(v1.0.70+)* rewrites a rough, stream-of-consciousness prompt into a clear, structured one before sending it to the agent:
+
+```
+/refine
+```
+
+Type your rough idea, and `/refine` transforms it into a precise, well-structured prompt. This is especially helpful for complex multi-step tasks where prompt clarity significantly affects output quality — for example, turning "um make the login thing work better with the existing setup" into a focused task description with clear scope and acceptance criteria.
+
 The `/env` command shows all loaded environment details — instructions, MCP servers, skills, agents, and plugins — in a single view. Use it to verify that the right resources are active for the current session:
 
 ```
@@ -697,6 +731,15 @@ copilot --autopilot --max-autopilot-continues 10 "Refactor the authentication mo
 
 Set it higher for long-running tasks, or lower for tasks where you want more frequent checkpoints. Setting it to `0` disables automatic continuation entirely.
 
+The `--sandbox` and `--no-sandbox` flags *(v1.0.70+)* turn the OS-level shell sandbox on or off for the current session only, without permanently changing your saved sandbox setting. This is useful with `-p` (prompt mode) when you need to temporarily adjust sandbox behavior for a specific automated task:
+
+```bash
+copilot --sandbox -p "Run the full test suite and fix any failures"
+copilot --no-sandbox -p "Set up development environment with system tools"
+```
+
+These flags apply only to the current invocation — your persisted sandbox preference remains unchanged.
+
 The `--attachment` flag (available in prompt mode, `-p`) lets you attach files — images or native documents — to the initial prompt in non-interactive mode:
 
 ```bash
diff --git a/website/src/content/docs/learning-hub/installing-and-using-plugins.md b/website/src/content/docs/learning-hub/installing-and-using-plugins.md
index a45c85add..fe8a1d6cc 100644
--- a/website/src/content/docs/learning-hub/installing-and-using-plugins.md
+++ b/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: 2026-06-24
+lastUpdated: 2026-07-09
 estimatedReadingTime: '8 minutes'
 tags:
   - plugins
@@ -160,6 +160,28 @@ To automatically register an additional marketplace for everyone working in a re
 
 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.
 
+### Pinning a Marketplace to a Specific Commit
+
+*(v1.0.70+)* To ensure reproducibility and prevent unintended updates, you can pin a marketplace to an exact commit SHA using the `sha` field in the source configuration:
+
+```json
+{
+  "extraKnownMarketplaces": [
+    {
+      "name": "my-org-plugins",
+      "source": "my-org/internal-plugins",
+      "sha": "a1b2c3d4e5f6..."
+    }
+  ]
+}
+```
+
+Pinning to a SHA guarantees that everyone on the team installs plugins from exactly that snapshot of the marketplace, regardless of subsequent changes to the repository. This is useful for:
+
+- **Reproducible CI environments** — ensure builds always use the same plugin versions
+- **Change control** — review and approve plugin updates before rolling them out team-wide
+- **Stability** — prevent breaking changes in upstream marketplaces from impacting your team without notice
+
 ## Installing Plugins
 
 ### From Copilot CLI