diff --git a/content/manuals/ai/sandboxes/agents/claude-code.md b/content/manuals/ai/sandboxes/agents/claude-code.md
index 931a5d7f8429..14b29879df9c 100644
--- a/content/manuals/ai/sandboxes/agents/claude-code.md
+++ b/content/manuals/ai/sandboxes/agents/claude-code.md
@@ -33,6 +33,13 @@ prompt from a file with `-- "$(cat prompt.txt)"`.
 To create a [mountless sandbox](../usage.md#choose-a-workspace), use
 `sbx create` without a workspace path, then attach by name.
 
+## Preserve conversations after sandbox removal
+
+To keep Claude Code conversations when you remove and recreate a local sandbox,
+add its session mixin when creating the sandbox. See
+[Preserve Claude Code and Codex conversations](../customize/use-kits.md#preserve-claude-code-and-codex-conversations)
+for commands and steps to resume a conversation.
+
 ## Authentication
 
 For the default Anthropic models, Claude Code requires either an Anthropic
diff --git a/content/manuals/ai/sandboxes/agents/codex.md b/content/manuals/ai/sandboxes/agents/codex.md
index da3e8d289a9e..ca97259c6bb3 100644
--- a/content/manuals/ai/sandboxes/agents/codex.md
+++ b/content/manuals/ai/sandboxes/agents/codex.md
@@ -32,6 +32,13 @@ $ sbx run codex
 To create a [mountless sandbox](../usage.md#choose-a-workspace), use
 `sbx create` without a workspace path, then attach by name.
 
+## Preserve conversations after sandbox removal
+
+To keep Codex conversations when you remove and recreate a local sandbox,
+add its session mixin when creating the sandbox. See
+[Preserve Claude Code and Codex conversations](../customize/use-kits.md#preserve-claude-code-and-codex-conversations)
+for commands and steps to resume a conversation.
+
 ## Authentication
 
 For the default OpenAI models, `sbx run codex` prompts you to authenticate on
diff --git a/content/manuals/ai/sandboxes/customize/use-kits.md b/content/manuals/ai/sandboxes/customize/use-kits.md
index 1879ddc09fb0..ae9818f9bfd8 100644
--- a/content/manuals/ai/sandboxes/customize/use-kits.md
+++ b/content/manuals/ai/sandboxes/customize/use-kits.md
@@ -328,6 +328,43 @@ discarded when the sandbox stops.
 For how to preserve storage when changing a kit, see
 [Configure the volume](author/patterns.md#configure-the-volume).
 
+### Preserve Claude Code and Codex conversations
+
+For local sandboxes, add a session mixin to keep conversations after removing
+and recreating the sandbox, including when you use `--rm`. Choose the mixin
+that matches your agent:
+
+{{< tabs >}}
+{{< tab name="Claude Code" >}}
+
+```console
+$ sbx run --rm docker.io/docker/sbx-kit-claude:2.1.267 \
+    --kit sbx/claude-sessions:1.0.0
+```
+
+{{< /tab >}}
+{{< tab name="Codex" >}}
+
+```console
+$ sbx run --rm docker.io/docker/sbx-kit-codex:0.155.1 \
+    --kit sbx/codex-sessions:1.0.0
+```
+
+{{< /tab >}}
+{{< /tabs >}}
+
+Start a conversation, then enter `/exit`. Run the same command again from the
+same project directory and enter `/resume` inside the agent to select the saved
+conversation.
+
+The mixins use host directories managed by Docker Sandboxes to store session
+state. They don't share conversations with Claude Code or Codex running directly
+on your host. Include the session mixin each time you recreate the sandbox.
+
+To choose a host directory, see [Choose directories for kit host mounts](#choose-directories-for-kit-host-mounts).
+The sandbox mount paths are `/home/agent/claude-history` for Claude Code and
+`/home/agent/codex-history` for Codex.
+
 ## Restrict kit sources
 
 [`kit.allowedSources`](../configuration/settings.md#kitallowedsources) controls