session autoload mechanism

main.go

@@ -1665,6 +1665,17 @@ func loadSession(sid string) ([]Message, error) {
   return nil, fmt.Errorf("session not found: %s", sid)
 }
 
+// findProjectSession returns the saved session for the current working
+// directory (if any), or nil when none exists yet.
+func findProjectSession() *Session {
+  pid := projectID()
+  ss := sessions()
+  for i := range ss {
+    if ss[i].ID == pid { return &ss[i] }
+  }
+  return nil
+}
+
 func autosave(msgs []Message) {
   saveSession(msgs, projectID())
 }
@@ -2156,6 +2167,22 @@ func main() {
     return
   }
   loadHistory()
+  // Interactive startup: if a session already exists for this directory, offer
+  // to autoload it so the user can seamlessly resume prior work.
+  if sess := findProjectSession(); sess != nil && len(sess.Messages) > 1 {
+    fmt.Println(c("[session found for this directory]", 33) + "  " + c(sess.ID, 32))
+    fmt.Println("  " + c(sess.Summary, 2))
+    fmt.Println(c(fmt.Sprintf("  created %s  [%d messages]", sess.Created, len(sess.Messages)), 2))
+    fmt.Print(c("Resume this session? [Y/n]: ", 33))
+    if ans, ok := readPlain(""); ok {
+      ans = strings.TrimSpace(strings.ToLower(ans))
+      if ans == "" || ans == "y" || ans == "yes" {
+        msgs = sess.Messages
+        autosave(msgs)
+        fmt.Println(c("[session resumed: "+sess.ID+"]", 32) + "  " + c(summary(msgs), 2))
+      }
+    }
+  }
   re := cfg.Raw["reasoning_effort"]
   if re == "" { re = "high" }
   fmt.Println(c("Bantam Agent ready", 1, 32) + c("  (Ctrl+J = new line)", 2))