Standardize LLM instructions prompt (#118195)

* Standardize instructions prompt

* Add time/date to default instructions

homeassistant/components/openai_conversation/config_flow.py

@@ -34,7 +34,6 @@ from .const import (
     CONF_RECOMMENDED,
     CONF_TEMPERATURE,
     CONF_TOP_P,
-    DEFAULT_PROMPT,
     DOMAIN,
     RECOMMENDED_CHAT_MODEL,
     RECOMMENDED_MAX_TOKENS,
@@ -53,7 +52,7 @@ STEP_USER_DATA_SCHEMA = vol.Schema(
 RECOMMENDED_OPTIONS = {
     CONF_RECOMMENDED: True,
     CONF_LLM_HASS_API: llm.LLM_API_ASSIST,
-    CONF_PROMPT: DEFAULT_PROMPT,
+    CONF_PROMPT: llm.DEFAULT_INSTRUCTIONS_PROMPT,
 }
 
 
@@ -170,7 +169,11 @@ def openai_config_option_schema(
     schema = {
         vol.Optional(
             CONF_PROMPT,
-            description={"suggested_value": options.get(CONF_PROMPT, DEFAULT_PROMPT)},
+            description={
+                "suggested_value": options.get(
+                    CONF_PROMPT, llm.DEFAULT_INSTRUCTIONS_PROMPT
+                )
+            },
         ): TemplateSelector(),
         vol.Optional(
             CONF_LLM_HASS_API,

homeassistant/components/openai_conversation/const.py

@@ -7,7 +7,6 @@ LOGGER = logging.getLogger(__package__)
 
 CONF_RECOMMENDED = "recommended"
 CONF_PROMPT = "prompt"
-DEFAULT_PROMPT = """Answer in plain text. Keep it simple and to the point."""
 CONF_CHAT_MODEL = "chat_model"
 RECOMMENDED_CHAT_MODEL = "gpt-4o"
 CONF_MAX_TOKENS = "max_tokens"

homeassistant/components/openai_conversation/conversation.py

@@ -23,7 +23,6 @@ from .const import (
     CONF_PROMPT,
     CONF_TEMPERATURE,
     CONF_TOP_P,
-    DEFAULT_PROMPT,
     DOMAIN,
     LOGGER,
     RECOMMENDED_CHAT_MODEL,
@@ -143,7 +142,8 @@ class OpenAIConversationEntity(
                 prompt = "\n".join(
                     (
                         template.Template(
-                            options.get(CONF_PROMPT, DEFAULT_PROMPT), self.hass
+                            options.get(CONF_PROMPT, llm.DEFAULT_INSTRUCTIONS_PROMPT),
+                            self.hass,
                         ).async_render(
                             {
                                 "ha_name": self.hass.config.location_name,