Add fire-and-forget prompting, remove auto-refresh

- B2 on session ID in main window sends selected text as prompt
- Remove periodic refresh (use Get manually to avoid cursor warping)
- Remove fire-and-forget idea from IDEAS.md (implemented)

IDEAS.md

@@ -2,15 +2,6 @@
 
 Vision: An LLM orchestrator that automates tasks with LLMs using Acme as the interface.
 
-## Fire and Forget Prompting
-
-Type a multi-line prompt, middle-click (X-x event) on a session ID to pass the prompt to that tmux session. Use case: start a task without following output (e.g., "build the program, fix errors and retry until successful").
-
-Implementation sketch:
-- Acme event handler watches for X-x (B2 chord) on session IDs
-- Extract selected text from current window as the prompt
-- Send prompt to the target session's tmux pane via `tmux send-keys`
-
 ## Shared Context
 
 Inject context from one session into another.

main.go

@@ -20,7 +20,6 @@ import (
 	"strconv"
 	"strings"
 	"syscall"
-	"time"
 
 	"9fans.net/go/acme"
 )
@@ -99,13 +98,6 @@ func main() {
 	refreshList(w, mgr)
 	w.Ctl("clean")
 
-	// Periodic refresh
-	go func() {
-		for range time.Tick(5 * time.Second) {
-			refreshList(w, mgr)
-		}
-	}()
-
 	// Event loop
 	for e := range w.EventChan() {
 		switch e.C2 {
@@ -113,6 +105,21 @@ func main() {
 			cmd := string(e.Text)
 			arg := strings.TrimSpace(string(e.Arg))
 
+			// Fire-and-forget: B2 on session ID sends selected text as prompt
+			if matched, _ := regexp.MatchString(`^[a-f0-9]{8}$`, cmd); matched {
+				if sess := mgr.Get(cmd); sess != nil {
+					// Get selected text from this window
+					if e.OrigQ0 != e.OrigQ1 {
+						w.Addr("#%d,#%d", e.OrigQ0, e.OrigQ1)
+						prompt, _ := w.ReadAll("xdata")
+						if len(prompt) > 0 {
+							go sess.Send(context.Background(), string(prompt))
+						}
+					}
+				}
+				continue
+			}
+
 			// Handle "Kiro /path", "Claude /path", "Kill <pid>", "Open <id>" typed directly in tag
 			if strings.HasPrefix(cmd, "Kiro ") {
 				arg = strings.TrimPrefix(cmd, "Kiro ")