Add Log command to Acme interface

Opens streaming log window that displays session chat history.
Window is named /AnviLLM/Log.{session-id-or-alias} and streams
log data continuously, marking window as clean after each write.

.gitignore

@@ -7,3 +7,4 @@ anvilweb
 .claude
 .kiro
 *.elc
+Assist

README.md

@@ -205,7 +205,7 @@ Type `Assist` in Acme and middle-click to open the `/AnviLLM/` session manager.
 
 ### Commands
 
-**Main window** (`/AnviLLM/`) tag: `Get Attach Stop Restart Kill Alias Context Daemon Sandbox`
+**Main window** (`/AnviLLM/`) tag: `Get Attach Stop Restart Kill Alias Context Log Daemon Sandbox`
 
 | Command | Description |
 |---------|-------------|
@@ -217,6 +217,7 @@ Type `Assist` in Acme and middle-click to open the `/AnviLLM/` session manager.
 | `Attach <id>` | Open tmux terminal |
 | `Alias <id> <name>` | Name a session |
 | `Context <id>` | Edit context (prepended to prompts) |
+| `Log <id>` | View session log |
 | `Daemon` | Manage anvilsrv daemon (start/stop/status) |
 | `Sandbox` | Configure sandbox settings |
 

cmd/Assist/main.go

@@ -92,7 +92,7 @@ func main() {
 	defer w.CloseFiles()
 
 	w.Name(windowName)
-	w.Write("tag", []byte("Get Attach Stop Restart Kill Alias Context Daemon Sandbox "))
+	w.Write("tag", []byte("Get Attach Stop Restart Kill Alias Context Log Daemon Sandbox "))
 	refreshList(w)
 	w.Ctl("clean")
 
@@ -221,6 +221,19 @@ func main() {
 				if err := openContextWindow(sess); err != nil {
 					fmt.Fprintf(os.Stderr, "Error opening context window: %v\n", err)
 				}
+			case "Log":
+				if arg == "" {
+					fmt.Fprintf(os.Stderr, "Usage: Log <session-id>\n")
+					continue
+				}
+				sess, err := getSession(arg)
+				if err != nil {
+					fmt.Fprintf(os.Stderr, "Session not found: %s\n", arg)
+					continue
+				}
+				if err := openLogWindow(sess); err != nil {
+					fmt.Fprintf(os.Stderr, "Error opening log window: %v\n", err)
+				}
 			case "Sandbox":
 				if err := openSandboxWindow(); err != nil {
 					fmt.Fprintf(os.Stderr, "Error opening sandbox window: %v\n", err)
@@ -592,6 +605,57 @@ func openContextWindow(sess *SessionInfo) error {
 	return nil
 }
 
+func openLogWindow(sess *SessionInfo) error {
+	go func() {
+		displayName := sess.Alias
+		if displayName == "" {
+			displayName = sess.ID
+		}
+
+		w, err := acme.New()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error creating log window: %v\n", err)
+			return
+		}
+		defer w.CloseFiles()
+		
+		w.Name(fmt.Sprintf("/AnviLLM/Log.%s", displayName))
+		w.Ctl("clean")
+
+		// Stream log using external command
+		logPath := fmt.Sprintf("agent/%s/log", sess.ID)
+		cmd := exec.Command("9p", "read", logPath)
+		
+		stdout, err := cmd.StdoutPipe()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error creating pipe: %v\n", err)
+			return
+		}
+		
+		if err := cmd.Start(); err != nil {
+			fmt.Fprintf(os.Stderr, "Error starting 9p read: %v\n", err)
+			return
+		}
+		
+		// Stream output to window
+		buf := make([]byte, 8192)
+		for {
+			n, err := stdout.Read(buf)
+			if n > 0 {
+				w.Addr("$")
+				w.Write("data", buf[:n])
+				w.Ctl("clean")
+			}
+			if err != nil {
+				break
+			}
+		}
+		
+		cmd.Wait()
+	}()
+	return nil
+}
+
 func handleContextWindow(w *acme.Win, sess *SessionInfo) {
 	defer w.CloseFiles()