docs: v0.2 version sidebar (#21844)

![image](https://github.com/langchain-ai/langchain/assets/9557659/189f2e04-0c08-4395-b729-f48982c6f53b)

docs/docs/versions/v0_2/deprecations.mdx

@@ -7,7 +7,7 @@ sidebar_label: Changes
 
 This code contains a list of deprecations and removals in the `langchain` and `langchain-core` packages.
 
-New features and improvements are not listed here. See the [overview](/docs/versions/v_02/overview) for a summary of what's new in this release.
+New features and improvements are not listed here. See the [overview](/docs/versions/overview/) for a summary of what's new in this release.
 
 ## Breaking changes
 
@@ -88,7 +88,7 @@ Code that has better alternatives available and will eventually be removed, so t
 
 ### astream events V1
 
-If you are using `astream_events`, please review how to [migrate to astream events v2](/docs/versions/v_02/migrating_astream_events).
+If you are using `astream_events`, please review how to [migrate to astream events v2](/docs/versions/v0_2/migrating_astream_events).
 
 ### langchain_core
 

docs/docs/versions/v0_2/index.mdx

@@ -1,11 +1,20 @@
 ---
 sidebar_position: 1
-sidebar_label: Migration
 ---
 
-# Migration
+# LangChain v0.2
+
+
+
+LangChain v0.2 was released in May 2024. This release includes a number of [breaking changes and deprecations](/docs/versions/v0_2/deprecations). This document contains a guide on upgrading to 0.2.x.
 
-LangChain v0.2 was released in May 2024. This release includes a number of [breaking changes and deprecations](/docs/versions/v_02/deprecations). This document contains a guide on upgrading to 0.2.x.
+:::note Reference
+
+- [Breaking Changes & Deprecations](/docs/versions/v0_2/deprecations)
+
+:::
+
+# Migration
 
 This documentation will help you upgrade your code to LangChain `0.2.x.`. To prepare for migration, we first recommend you take the following steps:
 
@@ -14,7 +23,6 @@ This documentation will help you upgrade your code to LangChain `0.2.x.`. To pre
 3. Install a recent version of `langchain-cli` , and use the tool to replace old imports used by your code with the new imports. (See instructions below.)
 4. Manually resolve any remaining deprecation warnings.
 5. Re-run unit tests.
-6. If you are using `astream_events`, please review how to [migrate to astream events v2](/docs/versions/v_02/migrating_astream_events).
 
 ## Upgrade to new imports
 

docs/docs/versions/v0_2/migrating_astream_events.mdx

@@ -5,6 +5,12 @@ sidebar_label: astream_events v2
 
 # Migrating to Astream Events v2
 
+:::danger
+
+This migration guide is a work in progress and is not complete. Please wait to migrate astream_events.
+
+:::
+
 We've added a `v2` of the astream_events API with the release of `0.2.0`. You can see this [PR](https://github.com/langchain-ai/langchain/pull/21638) for more details.
 
 The `v2` version is a re-write of the `v1` version, and should be more efficient, with more consistent output for the events. The `v1` version of the API will be deprecated in favor of the `v2` version and will be removed in  `0.4.0`.

docs/sidebars.js

@@ -69,18 +69,21 @@ module.exports = {
       collapsed: false,
       collapsible: false,
       items: [
+        "versions/overview",
         "versions/release_policy",
         "versions/packages",
         {
           type: "category",
           label: "v0.2",
-          items: [
-            {
-              type: "autogenerated",
-              dirName: "versions/v_02",
-            }
-          ]
-        }
+          link: {type: 'doc', id: 'versions/v0_2/index'},
+          collapsible: false,
+          collapsed: false,
+          items: [{
+            type: 'autogenerated',
+            dirName: 'versions/v0_2',
+            className: 'hidden',
+          }],
+        },
       ],
     },
     "security"