docs: update .env

Author: zhzLuke96

.env.example

@@ -7,6 +7,23 @@ GOOGLE_APPLICATION_CREDENTIALS=./anthropic-vertex-credentials.json
 HTTP_PROXY=
 HTTPS_PROXY=
 
+# Conversation processing settings
+
+# Handling of the first message
 # Possible values: `continue` | `remove`
 # default value: `remove`
 ENSURE_FIRST_MODE=continue
+
+# Message merging mode
+# Possible values: `all` | `only_system`
+# default value: `only_system`
+PROMPT_MERGE_MODE=only_system
+
+# System message merging mode
+# Possible values: `merge_all` | `merge_top_user` | `merge_top_assistant` | `only_first_user` | `only_first_assistant` | `only_first_remove`
+# default value: `merge_top_user`
+SYSTEM_MERGE_MODE=merge_top_user
+
+# Maximum token length for the conversation
+# default value: 4096
+MAX_TOKEN_LENGTH=4096

README.md

@@ -52,16 +52,34 @@ Here's a sample `.env` file:
 
 ```env
 # Anthropic Vertex AI configuration
-ANTHROPIC_VERTEX_PROJECT_ID=your-project-id
+ANTHROPIC_VERTEX_PROJECT_ID=
 CLOUD_ML_REGION=us-east5
 GOOGLE_APPLICATION_CREDENTIALS=./anthropic-vertex-credentials.json
 
-# Network proxy settings (if needed)
-HTTPS_PROXY=http://your-proxy-url:port
+# Network proxy settings
+HTTP_PROXY=
+HTTPS_PROXY=
 
-# ENSURE_FIRST_MODE options: 'continue' | 'remove'
-# Default: 'remove'
+# Conversation processing settings
+
+# Handling of the first message
+# Possible values: `continue` | `remove`
+# default value: `remove`
 ENSURE_FIRST_MODE=continue
+
+# Message merging mode
+# Possible values: `all` | `only_system`
+# default value: `only_system`
+PROMPT_MERGE_MODE=only_system
+
+# System message merging mode
+# Possible values: `merge_all` | `merge_top_user` | `merge_top_assistant` | `only_first_user` | `only_first_assistant` | `only_first_remove`
+# default value: `merge_top_user`
+SYSTEM_MERGE_MODE=merge_top_user
+
+# Maximum token length for the conversation
+# default value: 4096
+MAX_TOKEN_LENGTH=4096
 ```
 
 ## System Variables Explanation