Adds AI-powered stash message generation support

Author: eamodio

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ### Added
 
+- Adds new AI-powered ability to generate a stash message from the changes in the _Stash_ commands
 - Adds and expands AI model support for GitLens' AI features
   - Adds DeepSeek V3 and R1 models — closes [#3943](https://github.com/gitkraken/vscode-gitlens/issues/3943)
   - Adds o3-mini and o1 OpenAI models

docs/telemetry-events.md

@@ -160,6 +160,23 @@ or
 }
 ```
 
+or
+
+```typescript
+{
+  'duration': number,
+  'failed.error': string,
+  'failed.reason': 'user-declined' | 'user-cancelled' | 'error',
+  'input.length': number,
+  'model.id': string,
+  'model.provider.id': 'anthropic' | 'deepseek' | 'gemini' | 'github' | 'huggingface' | 'openai' | 'vscode' | 'xai',
+  'model.provider.name': string,
+  'output.length': number,
+  'retry.count': number,
+  'type': 'stashMessage'
+}
+```
+
 ### associateIssueWithBranch/action
 
 > Sent when the user chooses to manage integrations

package.json

@@ -3939,6 +3939,16 @@
 							"preview"
 						]
 					},
+					"gitlens.ai.generateStashMessage.customInstructions": {
+						"type": "string",
+						"default": null,
+						"markdownDescription": "Specifies custom instructions to provide to the AI provider when generating a stash message",
+						"scope": "window",
+						"order": 220,
+						"tags": [
+							"preview"
+						]
+					},
 					"gitlens.ai.generateCloudPatchMessage.customInstructions": {
 						"type": "string",
 						"default": null,