helmd v2: Go-server som styr agent i tmux — REST+SSE, frågedetektor, fildelning, ntfy, CI-release

- tmux som sanningskälla (agentoberoende, överlever omstart via adoption)
- API: sessions, prompt, question/answer, keys, mode, config, shares, notify, events
- frågedetektor testad mot riktiga agy 1.1.9-dumpar + mock
- integrationstest: 26 tester i isolerad debian-container (scripts/run-integration.sh)
- e2e-verifierad mot riktig agy (trust-fråga -> svar -> prompt)
- .gitea/workflows/helmd-release.yaml -> rullande helmd-latest (x64+arm64)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

helmd/tmux.go

@@ -0,0 +1,93 @@
+package main
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+// tmuxCmd runs a tmux command and returns its stdout.
+func tmuxCmd(args ...string) (string, error) {
+	out, err := exec.Command("tmux", args...).CombinedOutput()
+	if err != nil {
+		return "", fmt.Errorf("tmux %s: %v: %s", strings.Join(args, " "), err, strings.TrimSpace(string(out)))
+	}
+	return string(out), nil
+}
+
+func tmuxHasSession(name string) bool {
+	err := exec.Command("tmux", "has-session", "-t", "="+name).Run()
+	return err == nil
+}
+
+func tmuxListSessions() []string {
+	out, err := tmuxCmd("list-sessions", "-F", "#{session_name}")
+	if err != nil {
+		return nil // no tmux server running = no sessions
+	}
+	var names []string
+	for _, l := range strings.Split(strings.TrimSpace(out), "\n") {
+		if l != "" {
+			names = append(names, l)
+		}
+	}
+	return names
+}
+
+func tmuxNewSession(name, cwd string, width, height int, cmdline string) error {
+	args := []string{"new-session", "-d", "-s", name,
+		"-x", fmt.Sprint(width), "-y", fmt.Sprint(height)}
+	if cwd != "" {
+		args = append(args, "-c", cwd)
+	}
+	if cmdline != "" {
+		args = append(args, cmdline)
+	}
+	_, err := tmuxCmd(args...)
+	return err
+}
+
+func tmuxKillSession(name string) error {
+	_, err := tmuxCmd("kill-session", "-t", "="+name)
+	return err
+}
+
+// tmuxCapture returns the visible pane content. ansi keeps escape
+// sequences (for terminal-faithful rendering in clients).
+func tmuxCapture(name string, ansi bool, history int) (string, error) {
+	args := []string{"capture-pane", "-p", "-t", "=" + name + ":"}
+	if ansi {
+		args = append(args, "-e")
+	}
+	if history > 0 {
+		args = append(args, "-S", fmt.Sprintf("-%d", history))
+	}
+	return tmuxCmd(args...)
+}
+
+// tmuxSendKeys sends key names (Enter, Up, Down, BTab, C-c, ...).
+func tmuxSendKeys(name string, keys ...string) error {
+	args := append([]string{"send-keys", "-t", "=" + name + ":"}, keys...)
+	_, err := tmuxCmd(args...)
+	return err
+}
+
+// tmuxPasteText inserts literal text (multi-line safe) via a paste
+// buffer, without submitting it.
+func tmuxPasteText(name, text string) error {
+	cmd := exec.Command("tmux", "load-buffer", "-b", "helmd", "-")
+	cmd.Stdin = strings.NewReader(text)
+	if out, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("tmux load-buffer: %v: %s", err, strings.TrimSpace(string(out)))
+	}
+	_, err := tmuxCmd("paste-buffer", "-d", "-b", "helmd", "-t", "="+name+":")
+	return err
+}
+
+func tmuxSessionAlive(name string) bool {
+	out, err := tmuxCmd("list-panes", "-t", "="+name+":", "-F", "#{pane_dead}")
+	if err != nil {
+		return false
+	}
+	return strings.TrimSpace(out) == "0"
+}