feat: agent supports dynamic instructions (#1023)

* feat: agent supports dynamic instructions

* change tool calls' null output to 'TODO'

* REPL don't print banner if use agent/rag

1 files changed, 8 insertions, 4 deletions

diff --git a/src/config/session.rs b/src/config/session.rs
index 4b3da76..820fa12 100644
--- a/src/config/session.rs
+++ b/src/config/session.rs
@@ -36,6 +36,8 @@ pub struct Session {
     role_name: Option<String>,
     #[serde(default, skip_serializing_if = "IndexMap::is_empty")]
     agent_variables: AgentVariables,
+    #[serde(default, skip_serializing_if = "String::is_empty")]
+    agent_instructions: String,
 
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     compressed_messages: Vec<Message>,
@@ -275,19 +277,21 @@ impl Session {
         self.role_prompt.clear();
     }
 
-    pub fn sync_agent(&mut self, agent: &Agent, set_dirty: bool) {
+    pub fn sync_agent(&mut self, agent: &Agent) {
         self.role_name = None;
         self.role_prompt = agent.interpolated_instructions();
         self.agent_variables = agent.variables().clone();
-        if set_dirty {
-            self.dirty = true;
-        }
+        self.agent_instructions = self.role_prompt.clone();
     }
 
     pub fn agent_variables(&self) -> &AgentVariables {
         &self.agent_variables
     }
 
+    pub fn agent_instructions(&self) -> &str {
+        &self.agent_instructions
+    }
+
     pub fn set_save_session(&mut self, value: Option<bool>) {
         if self.save_session != value {
             self.save_session = value;