Document direct project and extension lookups

browsers/extensions.mdx

@@ -44,6 +44,9 @@ kernel extensions upload ./my-extension --name my-extension
 Extensions uploaded to Kernel are assigned a random ID, but you can also give them a name for easier reference.
 This name must be unique within your [project](/info/projects).
 
+To retrieve an extension's metadata without downloading the archive, call `GET /extensions/{id_or_name}/metadata`.
+The response includes the extension's ID, name, size, and timestamps.
+
 ## Using extensions in a browser
 
 Passing the extension name or ID to the `create` method will load it into the browser.

info/projects.mdx

@@ -165,7 +165,7 @@ Use the `/org/projects` REST endpoints (or the SDKs' `projects` resource) to man
 | --- | --- | --- |
 | `GET` | `/org/projects` | List projects in the organization |
 | `POST` | `/org/projects` | Create a project |
-| `GET` | `/org/projects/{id}` | Get a project by ID |
+| `GET` | `/org/projects/{id}` | Get a project by ID or name |
 | `PATCH` | `/org/projects/{id}` | Update a project's name or status (`active` / `archived`) |
 | `DELETE` | `/org/projects/{id}` | Delete a project (must be empty and not the last active project) |
 
@@ -244,6 +244,30 @@ if err := pager.Err(); err != nil {
 ```
 </CodeGroup>
 
+### Get a project
+
+Project names are unique within an organization. You can retrieve a project by its ID or by its name.
+
+<CodeGroup>
+```typescript TypeScript
+const project = await kernel.projects.get('staging');
+console.log(project.id); // proj_abc123
+```
+
+```python Python
+project = kernel.projects.get("staging")
+print(project.id)  # proj_abc123
+```
+
+```go Go
+project, err := client.Projects.Get(ctx, "staging")
+if err != nil {
+	panic(err)
+}
+fmt.Println(project.ID) // proj_abc123
+```
+</CodeGroup>
+
 ### Update a project
 
 <CodeGroup>