docs: move tmux documentation to its own file

2 files changed, 85 insertions, 80 deletions

diff --git a/internal/editor/editor.go b/internal/editor/editor.go
index 44aa1d4..a1af1be 100644
--- a/internal/editor/editor.go
+++ b/internal/editor/editor.go
@@ -1,70 +1,70 @@
 package editor
 
 import (
-    "errors"
-    "os"
-    "os/exec"
-    "path/filepath"
-    "strings"
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
 )
 
 // Resolve returns the editor command from HEXAI_EDITOR or EDITOR.
 func Resolve() (string, error) {
-    ed := strings.TrimSpace(os.Getenv("HEXAI_EDITOR"))
-    if ed == "" {
-        ed = strings.TrimSpace(os.Getenv("EDITOR"))
-    }
-    if ed == "" {
-        return "", errors.New("no editor configured (set HEXAI_EDITOR or EDITOR)")
-    }
-    return ed, nil
+	ed := strings.TrimSpace(os.Getenv("HEXAI_EDITOR"))
+	if ed == "" {
+		ed = strings.TrimSpace(os.Getenv("EDITOR"))
+	}
+	if ed == "" {
+		return "", errors.New("no editor configured (set HEXAI_EDITOR or EDITOR)")
+	}
+	return ed, nil
 }
 
 // RunEditor is the seam that invokes the editor on the given file path.
 // Override in tests to avoid launching a real editor.
 var RunEditor = func(editor, path string) error {
-    cmd := exec.Command(editor, path)
-    cmd.Stdin = os.Stdin
-    cmd.Stdout = os.Stdout
-    cmd.Stderr = os.Stderr
-    return cmd.Run()
+	cmd := exec.Command(editor, path)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
 }
 
 // OpenTempAndEdit creates a temporary .md file, writes initial content if provided,
 // opens it in the resolved editor, then reads the final content and removes the file.
 // Returns the trimmed content.
 func OpenTempAndEdit(initial []byte) (string, error) {
-    ed, err := Resolve()
-    if err != nil {
-        return "", err
-    }
-    // Create temp file under system temp dir; ensure .md suffix
-    dir := os.TempDir()
-    f, err := os.CreateTemp(dir, "hexai-*.md")
-    if err != nil {
-        return "", err
-    }
-    path := f.Name()
-    defer func() { _ = os.Remove(path) }()
-    if len(initial) > 0 {
-        if _, err := f.Write(initial); err != nil {
-            _ = f.Close()
-            return "", err
-        }
-    }
-    if err := f.Sync(); err != nil {
-        _ = f.Close()
-        return "", err
-    }
-    if err := f.Close(); err != nil {
-        return "", err
-    }
-    if err := RunEditor(ed, path); err != nil {
-        return "", err
-    }
-    b, err := os.ReadFile(filepath.Clean(path))
-    if err != nil {
-        return "", err
-    }
-    return strings.TrimSpace(string(b)), nil
+	ed, err := Resolve()
+	if err != nil {
+		return "", err
+	}
+	// Create temp file under system temp dir; ensure .md suffix
+	dir := os.TempDir()
+	f, err := os.CreateTemp(dir, "hexai-*.md")
+	if err != nil {
+		return "", err
+	}
+	path := f.Name()
+	defer func() { _ = os.Remove(path) }()
+	if len(initial) > 0 {
+		if _, err := f.Write(initial); err != nil {
+			_ = f.Close()
+			return "", err
+		}
+	}
+	if err := f.Sync(); err != nil {
+		_ = f.Close()
+		return "", err
+	}
+	if err := f.Close(); err != nil {
+		return "", err
+	}
+	if err := RunEditor(ed, path); err != nil {
+		return "", err
+	}
+	b, err := os.ReadFile(filepath.Clean(path))
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(b)), nil
 }
diff --git a/internal/editor/editor_test.go b/internal/editor/editor_test.go
index df6dec7..06cc165 100644
--- a/internal/editor/editor_test.go
+++ b/internal/editor/editor_test.go
@@ -1,39 +1,44 @@
 package editor
 
 import (
-    "os"
-    "path/filepath"
-    "testing"
+	"os"
+	"path/filepath"
+	"testing"
 )
 
 func TestResolve_EnvPriority(t *testing.T) {
-    t.Setenv("HEXAI_EDITOR", "ed1")
-    t.Setenv("EDITOR", "ed2")
-    ed, err := Resolve()
-    if err != nil || ed != "ed1" {
-        t.Fatalf("Resolve failed: %v %q", err, ed)
-    }
-    t.Setenv("HEXAI_EDITOR", "")
-    ed, err = Resolve()
-    if err != nil || ed != "ed2" {
-        t.Fatalf("Resolve fallback failed: %v %q", err, ed)
-    }
+	t.Setenv("HEXAI_EDITOR", "ed1")
+	t.Setenv("EDITOR", "ed2")
+	ed, err := Resolve()
+	if err != nil || ed != "ed1" {
+		t.Fatalf("Resolve failed: %v %q", err, ed)
+	}
+	t.Setenv("HEXAI_EDITOR", "")
+	ed, err = Resolve()
+	if err != nil || ed != "ed2" {
+		t.Fatalf("Resolve fallback failed: %v %q", err, ed)
+	}
 }
 
 func TestOpenTempAndEdit_UsesRunEditor(t *testing.T) {
-    old := RunEditor
-    t.Cleanup(func(){ RunEditor = old })
-    // Ensure Resolve() succeeds
-    t.Setenv("HEXAI_EDITOR", "dummy")
-    var capturedPath string
-    RunEditor = func(editor, path string) error {
-        capturedPath = path
-        // simulate user writing content
-        return os.WriteFile(path, []byte("Hello\nWorld\n"), 0o600)
-    }
-    out, err := OpenTempAndEdit([]byte("# Start\n\n"))
-    if err != nil { t.Fatalf("OpenTempAndEdit: %v", err) }
-    if out != "Hello\nWorld" { t.Fatalf("unexpected content: %q", out) }
-    if filepath.Ext(capturedPath) != ".md" { t.Fatalf("expected .md suffix: %s", capturedPath) }
+	old := RunEditor
+	t.Cleanup(func() { RunEditor = old })
+	// Ensure Resolve() succeeds
+	t.Setenv("HEXAI_EDITOR", "dummy")
+	var capturedPath string
+	RunEditor = func(editor, path string) error {
+		capturedPath = path
+		// simulate user writing content
+		return os.WriteFile(path, []byte("Hello\nWorld\n"), 0o600)
+	}
+	out, err := OpenTempAndEdit([]byte("# Start\n\n"))
+	if err != nil {
+		t.Fatalf("OpenTempAndEdit: %v", err)
+	}
+	if out != "Hello\nWorld" {
+		t.Fatalf("unexpected content: %q", out)
+	}
+	if filepath.Ext(capturedPath) != ".md" {
+		t.Fatalf("expected .md suffix: %s", capturedPath)
+	}
 }
-