add hexai-tmux-edit: tmux popup editor for AI agent prompts

New tool that opens $EDITOR in a tmux popup for composing longer prompts
when working with AI CLI agents (Claude Code, Cursor, Amp, Aider, etc.).
Captures existing prompt text from the target pane, pre-fills the editor,
and sends edited text back via tmux send-keys. Config-driven agent
detection via regex patterns in [tmux_edit] config section.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/cmd/hexai-tmux-edit/main.go b/cmd/hexai-tmux-edit/main.go
new file mode 100644
index 0000000..928a2cd
--- /dev/null
+++ b/cmd/hexai-tmux-edit/main.go
@@ -0,0 +1,48 @@
+// hexai-tmux-edit opens a tmux popup with $EDITOR for composing AI agent
+// prompts. It captures existing prompt text from the target pane, pre-fills
+// the editor, and sends the edited text back via tmux send-keys.
+//
+// Usage:
+//
+//	hexai-tmux-edit [--config <path>] [--agent <name>] [--pane <id>]
+//
+// Tmux keybinding (add to ~/.tmux.conf):
+//
+//	bind e run-shell -b "hexai-tmux-edit --pane '#{pane_id}'"
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"codeberg.org/snonux/hexai/internal/appconfig"
+	"codeberg.org/snonux/hexai/internal/tmuxedit"
+)
+
+func main() {
+	defaultPath := defaultConfigPath()
+	configPath := flag.String("config", "", fmt.Sprintf("path to config file (default: %s)", defaultPath))
+	agent := flag.String("agent", "", "AI agent name (auto-detected if omitted)")
+	pane := flag.String("pane", "", "tmux target pane ID (e.g. %%5)")
+	flag.Parse()
+
+	opts := tmuxedit.Options{
+		ConfigPath: strings.TrimSpace(*configPath),
+		Agent:      strings.TrimSpace(*agent),
+		Pane:       strings.TrimSpace(*pane),
+	}
+	if err := tmuxedit.Run(opts); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func defaultConfigPath() string {
+	path, err := appconfig.ConfigPath()
+	if err != nil {
+		return "$XDG_CONFIG_HOME/hexai/config.toml"
+	}
+	return path
+}